/* ============================================================
   MEIN WÖRTERBUCH — Design System
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=Inter:wght@300;400;500;600&display=swap');

/* ── Accessibility utilities ── */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: absolute;
  left: 8px; top: -48px;
  z-index: 1000;
  background: var(--sky-blue, #5cc3e8);
  color: #08313f;
  padding: 10px 16px;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  transition: top 0.18s ease;
}
.skip-link:focus { top: 8px; outline: 2px solid #fff; outline-offset: 2px; }
/* Always show a visible keyboard focus ring */
:focus-visible { outline: 2px solid var(--sky-blue, #5cc3e8); outline-offset: 2px; }

/* ── CSS Variables ── */
:root {
  /* ── Brand Palette (light mode) ── */
  --navy: #314855;
  --sky-blue: #5cc3e8;
  --sunshine: #ffdb00;
  --mint: #79ceb8;
  --coral: #e95f5c;

  /* Primary Accent Mapping */
  --primary: var(--sky-blue);

  /* Light surfaces */
  --bg-primary: #f8fafc;
  --bg-secondary: #ffffff;
  --bg-tertiary: #f1f5f9;
  --bg-card: rgba(255, 255, 255, 0.98);
  --bg-card-hover: #ffffff;

  /* Brand accents mapped */
  --accent-gold: var(--sunshine);
  --accent-gold-soft: rgba(255, 219, 0, 0.15);
  --accent-gold-glow: rgba(255, 219, 0, 0.3);

  --accent-blue: var(--sky-blue);
  --accent-blue-soft: rgba(92, 195, 232, 0.12);
  --accent-blue-light: #8ce1ff;
  --accent-blue-light-soft: rgba(140, 225, 255, 0.12);

  --accent-green: var(--mint);
  --accent-green-soft: rgba(121, 206, 184, 0.15);

  --accent-red: var(--coral);
  --accent-red-soft: rgba(233, 95, 92, 0.12);

  /* --accent-purple was an off-brand violet (#5cc3e8). Mapped to the brand
     sky-blue so the palette stays to the five brand colours only. */
  --accent-purple: var(--sky-blue);
  --accent-purple-soft: var(--accent-blue-soft);

  /* CEFR level scale — built ONLY from brand colours, progressing
     beginner→advanced: mint → sky-blue → sunshine → navy → coral.
     Single source of truth; js/cefr.js mirrors these. */
  --cefr-a1: var(--mint);
  --cefr-a2: var(--sky-blue);
  --cefr-b1: var(--sunshine);
  --cefr-b2: var(--navy);
  --cefr-c1: var(--coral);
  --cefr-c2: var(--coral);

  /* Status dots / pills — brand-mapped */
  --status-ok: var(--mint);
  --status-warn: var(--sunshine);
  --status-error: var(--coral);

  /* Dark text on light backgrounds */
  --text-primary: var(--navy);
  --text-secondary: #475a66;
  --text-muted: #8397a6;
  --text-accent: #3b8ea5;

  /* Light borders */
  --border: rgba(49, 72, 85, 0.08);
  --border-accent: rgba(92, 195, 232, 0.45);
  --border-hover: rgba(49, 72, 85, 0.15);

  /* Subtle shadows (depth via shadow, not dark bg) */
  --shadow-sm: 0 1px 4px rgba(49, 72, 85, 0.08);
  --shadow-md: 0 4px 20px rgba(49, 72, 85, 0.10);
  --shadow-lg: 0 12px 48px rgba(49, 72, 85, 0.14);
  --shadow-gold: 0 0 24px rgba(255, 219, 0, 0.3);

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Radii */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

/* ── Reset & Base ── */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.6;
}

/* Background subtle grid pattern */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(92, 195, 232, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(92, 195, 232, 0.055) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  z-index: 0;
}

/* Ambient glow blobs */
body::after {
  content: '';
  position: fixed;
  top: -160px;
  right: -160px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(255,219,0, 0.18) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ── Typography ── */
h1, h2, h3, h4, h5 {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.4rem; }
h4 { font-size: 1.1rem; }

p { color: var(--text-secondary); }

/* ── Layout ── */
#app {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
  width: 100%;
}

/* ── Header / Navbar ── */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 12px rgba(30, 40, 100, 0.07);
  padding: var(--space-md) 0;
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
}

.logo-icon {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(92, 195, 232, 0.15);
  flex-shrink: 0;
}

.logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.3);
}

.logo-text {
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--text-primary);
  letter-spacing: -0.5px;
  white-space: nowrap;
}

.logo-text span {
  color: var(--sky-blue);
}

.nav-tabs {
  display: flex;
  gap: var(--space-xs);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 4px;
}

.nav-tab {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  border: none;
  background: transparent;
  transition: all var(--transition-base);
  white-space: nowrap;
}

.nav-tab:hover {
  color: var(--text-primary);
  background: var(--bg-card-hover);
}

.nav-tab.active {
  background: var(--sky-blue);
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(92, 195, 232, 0.25);
}

.nav-tab svg {
  width: 15px;
  height: 15px;
}

.nav-count-badge {
  background: var(--accent-gold-soft);
  color: var(--text-primary);
  padding: 1px 7px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
}

.nav-stats {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.stat-pill {
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 6px 12px;
  font-size: 0.8rem;
  color: var(--text-secondary);
}

#nav-level-pill {
  background: var(--accent-blue-soft);
  color: var(--sky-blue);
  border-color: rgba(92, 195, 232, 0.25);
}

#nav-level-pill .stat-pill-value {
  color: inherit;
}

.stat-pill-value {
  font-weight: 700;
  color: var(--accent-gold);
  font-family: 'Outfit', sans-serif;
}

/* ── Main Content ── */
.main-content {
  flex: 1;
  padding: var(--space-xl) 0;
}

/* ── Views ── */
.view {
  display: none;
  animation: fadeIn 0.3s ease;
}

.view.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ── Cards ── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  box-shadow: var(--shadow-md);
}

.card-gold {
  border-color: rgba(255,219,0, 0.28);
  background: linear-gradient(135deg, rgba(255,219,0, 0.07), rgba(92, 195, 232, 0.04));
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all var(--transition-base);
  text-decoration: none;
  white-space: nowrap;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--sky-blue);
  color: #ffffff;
  box-shadow: 0 4px 16px rgba(92, 195, 232, 0.25);
}

.btn-primary:hover:not(:disabled) {
  background: #4bb4d9;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(92, 195, 232, 0.35);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
}

.btn-secondary {
  background: var(--navy);
  color: #ffffff;
  border: 1px solid var(--navy);
  box-shadow: 0 4px 12px rgba(49, 72, 85, 0.15);
}

.btn-secondary:hover:not(:disabled) {
  background: #253742;
  border-color: #253742;
  transform: translateY(-2px);
}

.btn-accent {
  background: var(--sunshine);
  color: var(--navy);
  box-shadow: 0 4px 12px rgba(255, 219, 0, 0.15);
}

.btn-accent:hover:not(:disabled) {
  background: #e6c500;
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(255, 219, 0, 0.25);
}

.btn-success {
  background: var(--mint);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(121, 206, 184, 0.15);
}

.btn-success:hover:not(:disabled) {
  background: #66bfa7;
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid transparent;
}

.btn-ghost:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.btn-danger {
  background: var(--coral);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(233, 95, 92, 0.15);
}

.btn-danger:hover:not(:disabled) {
  background: #d8504d;
  transform: translateY(-2px);
}

.btn-sm {
  padding: 7px 13px;
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 16px 28px;
  font-size: 1rem;
  border-radius: var(--radius-lg);
}

.btn-pill {
  border-radius: var(--radius-full);
  padding: 6px 14px;
  font-size: 0.8rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.btn-icon {
  width: 36px;
  height: 36px;
  padding: 0;
  border-radius: var(--radius-sm);
}

/* ── Inputs ── */
.input-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.input-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.input, .textarea, .select {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  padding: 12px 16px;
  transition: all var(--transition-base);
  width: 100%;
  outline: none;
}

.input::placeholder, .textarea::placeholder {
  color: var(--text-muted);
}

.input:focus, .textarea:focus, .select:focus {
  border-color: var(--accent-blue);
  background: rgba(92, 195, 232, 0.04);
  box-shadow: 0 0 0 3px rgba(92, 195, 232, 0.1);
}

.textarea {
  resize: vertical;
  min-height: 100px;
}

.select option {
  background: var(--bg-secondary);
  color: var(--text-primary);
}

/* ── Badges / Tags ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* Badges — mapped to CodePen brand palette */
.badge-noun      { background: rgba(92, 195, 232, 0.14);  color: #0089cc; }  /* cyan  */
.badge-verb      { background: rgba(121,206,184, 0.14);  color: #2da85a; }  /* green */
.badge-adjective { background: rgba(92,195,232, 0.14);  color: #8a45c0; }  /* purple */
.badge-greeting  { background: rgba(255,219,0, 0.18);   color: #a08000; }  /* yellow */
.badge-food      { background: rgba(233,95,92, 0.12);   color: #cc2428; }  /* red */
.badge-travel    { background: rgba(118, 218, 255, 0.18); color: #0089cc; }  /* sky blue */
.badge-number    { background: rgba(121,206,184, 0.14);  color: #2da85a; }  /* green */
.badge-feelings  { background: rgba(92,195,232, 0.14);  color: #8a45c0; }  /* purple */
.badge-work      { background: rgba(92, 195, 232, 0.14);  color: #0089cc; }  /* cyan */
.badge-general   { background: rgba(0, 0, 0, 0.06);       color: #7880a0; }  /* neutral */
.badge-phrase    { background: rgba(233,95,92, 0.12);   color: #cc2428; }  /* red */

/* ── Section Headers ── */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-xl);
  gap: var(--space-md);
}

.section-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1.6rem;
  font-weight: 700;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 4px;
}

/* ── Translator View ── */
.translator-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  align-items: start;
  margin-bottom: var(--space-xl);
}

@media (max-width: 1024px) {
  .translator-grid {
    grid-template-columns: 1fr;
  }
}

.translator-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}

.translator-panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border);
}

.lang-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.lang-flag {
  font-size: 1.2rem;
}

.translator-textarea {
  border: none;
  border-radius: 0;
  background: transparent;
  padding: var(--space-lg);
  font-size: 1.1rem;
  min-height: 140px;
  resize: none;
  width: 100%;
}

.translator-textarea:focus {
  border: none;
  box-shadow: none;
  background: transparent;
}

.translator-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-top: 1px solid var(--border);
  gap: var(--space-sm);
}

.char-count {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.translate-btn-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
}

.swap-btn {
  width: 48px;
  height: 48px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-base);
  color: var(--text-secondary);
}

.swap-btn:hover {
  background: rgba(92, 195, 232, 0.1);
  border-color: rgba(92, 195, 232, 0.4);
  color: var(--accent-blue);
  transform: rotate(180deg);
}

.result-panel {
  position: relative;
}

.result-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 140px;
  gap: var(--space-sm);
  color: var(--text-muted);
  font-size: 0.9rem;
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent-blue);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.result-text {
  padding: var(--space-lg);
  font-size: 1.3rem;
  font-weight: 500;
  font-family: 'Outfit', sans-serif;
  color: var(--text-primary);
  min-height: 140px;
  display: flex;
  align-items: flex-start;
}

.result-empty {
  color: var(--text-muted);
  font-size: 1rem;
  font-weight: 400;
  font-family: 'Inter', sans-serif;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: var(--space-sm);
}

.result-empty svg {
  width: 32px;
  height: 32px;
  opacity: 0.3;
}

.word-meta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
  padding: 0 var(--space-lg) var(--space-md);
}

.save-action-bar {
  background: rgba(92, 195, 232, 0.07);
  border-top: 1px solid rgba(92, 195, 232, 0.22);
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.save-action-bar .save-msg {
  font-size: 0.85rem;
  color: #0089cc;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* Recent translations */
.recent-section {
  margin-top: var(--space-xl);
}

.recent-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.recent-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base);
}

.recent-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateX(4px);
}

.recent-en {
  font-size: 0.9rem;
  color: var(--text-secondary);
  flex: 1;
}

.recent-arrow {
  color: var(--text-muted);
}

.recent-de {
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  color: var(--text-primary);
  flex: 1;
}

.recent-time {
  font-size: 0.75rem;
  color: var(--text-muted);
}

/* ── Word Bank View ── */
.wordbank-controls {
  display: flex;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
  align-items: center;
}

.search-wrap {
  flex: 1;
  min-width: 200px;
  position: relative;
}

.search-wrap svg {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  width: 16px;
  height: 16px;
}

.search-wrap .input {
  padding-left: 38px;
}

.filter-pills {
  display: flex;
  gap: var(--space-xs);
  flex-wrap: wrap;
}

.filter-pill {
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-secondary);
  transition: all var(--transition-base);
}

.filter-pill:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.filter-pill.active {
  background: rgba(92, 195, 232, 0.12);
  border-color: rgba(92, 195, 232, 0.38);
  color: var(--accent-blue);
}

.word-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-md);
}

.word-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.word-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #5cc3e8, #79ceb8, #5cc3e8);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.word-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-card-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: rgba(92, 195, 232, 0.28);
}

.word-card:hover::before {
  opacity: 1;
}

.word-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}

.word-card-de {
  font-family: 'Outfit', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
}

.word-card-en {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 2px;
}

.word-card-actions {
  display: flex;
  gap: 4px;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.word-card:hover .word-card-actions {
  opacity: 1;
}

.word-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--space-md);
  padding-top: var(--space-md);
  border-top: 1px solid var(--border);
}

.frequency-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  color: var(--text-muted);
}

.freq-dots {
  display: flex;
  gap: 3px;
}

.freq-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--border);
  transition: background var(--transition-base);
}

.freq-dot.active {
  background: #ffdb00;
}

.empty-state {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
  color: var(--text-muted);
}

.empty-state-icon {
  font-size: 4rem;
  margin-bottom: var(--space-md);
  opacity: 0.5;
}

.empty-state h3 {
  color: var(--text-secondary);
  margin-bottom: var(--space-sm);
}

/* ── Insights View ── */
.insights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-base);
}

.stat-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.stat-card-icon {
  font-size: 2rem;
  margin-bottom: var(--space-sm);
}

.stat-card-value {
  font-family: 'Outfit', sans-serif;
  font-size: 2.5rem;
  font-weight: 800;
  color: #0089cc;
  line-height: 1;
  margin-bottom: 4px;
}

.stat-card-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.insights-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}




.chart-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  box-shadow: var(--shadow-sm);
}

.chart-title {
  font-family: 'Outfit', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: var(--space-lg);
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Category bars */
.category-bars {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.cat-bar-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.cat-bar-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.85rem;
}

.cat-bar-name {
  color: var(--text-secondary);
  font-weight: 500;
}

.cat-bar-count {
  color: var(--text-muted);
  font-size: 0.78rem;
}

.cat-bar-track {
  height: 8px;
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.cat-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Top words list */
.top-words-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.top-word-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.02);
  transition: background var(--transition-fast);
}

.top-word-item:hover {
  background: rgba(255,255,255,0.05);
}

.top-word-rank {
  font-family: 'Outfit', sans-serif;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  width: 20px;
  text-align: center;
}

.top-word-rank.gold { color: #ffd700; }
.top-word-rank.silver { color: #c0c0c0; }
.top-word-rank.bronze { color: #cd7f32; }

.top-word-text {
  flex: 1;
}

.top-word-de {
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 0.95rem;
}

.top-word-en {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.top-word-freq {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.8rem;
  color: #0089cc;
  font-weight: 600;
}

/* Streak calendar */
.streak-section {
  margin-top: var(--space-lg);
}

.streak-calendar {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.streak-day {
  width: 16px;
  height: 16px;
  border-radius: 3px;
  background: rgba(255,255,255,0.05);
  transition: all var(--transition-fast);
}

.streak-day.active-1 { background: rgba(255,219,0, 0.28); }
.streak-day.active-2 { background: rgba(255,219,0, 0.55); }
.streak-day.active-3 { background: rgba(255,219,0, 0.82); }
.streak-day.today    { background: #ffdb00; box-shadow: 0 0 10px rgba(255,219,0, 0.65); }

/* Older Exercise View styles removed (redefined under DUOLINGO-style lesson cards below) */

/* Flashcard */
.flashcard-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-xl);
  padding: var(--space-xl) 0;
}

.flashcard-progress {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  width: 100%;
  max-width: 500px;
}

.progress-bar {
  flex: 1;
  height: 6px;
  background: rgba(255,255,255,0.06);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #5cc3e8, #79ceb8);
  border-radius: var(--radius-full);
  transition: width 0.4s ease;
}

.progress-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.flashcard-scene {
  width: 100%;
  max-width: 500px;
  height: 280px;
  perspective: 1000px;
  cursor: pointer;
}

.flashcard-inner {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.flashcard-inner.flipped {
  transform: rotateY(180deg);
}

.flashcard-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--radius-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  border: 1px solid var(--border);
}

.flashcard-front {
  background: var(--bg-secondary);
  box-shadow: var(--shadow-md);
}

.flashcard-back {
  background: linear-gradient(135deg, #fffce0, #fff6b0);
  border-color: rgba(255,219,0, 0.55);
  box-shadow: var(--shadow-md);
  transform: rotateY(180deg);
}

.flashcard-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.flashcard-back .flashcard-hint {
  color: #9a8000;
}

.flashcard-word {
  font-family: 'Outfit', sans-serif;
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  padding: 0 var(--space-xl);
}

.flashcard-back .flashcard-word {
  color: #8a7000;
}

.flashcard-category {
  margin-top: -8px;
}

.flashcard-controls {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

/* Multiple Choice */
.mc-container {
  max-width: 600px;
  margin: 0 auto;
}

.mc-question {
  font-family: 'Outfit', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-xl);
  padding: var(--space-xl);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.mc-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.mc-option {
  padding: var(--space-lg);
  border: 2px solid var(--border);
  border-radius: var(--radius-lg);
  font-family: 'Outfit', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  background: var(--bg-card);
  color: var(--text-primary);
  transition: all var(--transition-base);
  text-align: left;
}

.mc-option:hover:not(:disabled) {
  border-color: rgba(92, 195, 232, 0.5);
  background: rgba(92, 195, 232, 0.08);
  color: #5cc3e8;
}

.mc-option.correct {
  border-color: #79ceb8;
  background: rgba(121,206,184, 0.13);
  color: #79ceb8;
}

.mc-option.wrong {
  border-color: #e95f5c;
  background: rgba(233,95,92, 0.13);
  color: #e95f5c;
}

/* Fill in the blank */
.fitb-container {
  max-width: 600px;
  margin: 0 auto;
}

.fitb-sentence {
  font-family: 'Outfit', sans-serif;
  font-size: 1.4rem;
  font-weight: 600;
  text-align: center;
  line-height: 2;
  margin-bottom: var(--space-xl);
  padding: var(--space-xl);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}

.fitb-blank {
  display: inline-block;
  width: 140px;
  border-bottom: 3px solid #ffdb00;
  margin: 0 8px;
  vertical-align: bottom;
  text-align: center;
  color: #ffdb00;
  font-weight: 700;
}

.fitb-input-row {
  display: flex;
  gap: var(--space-md);
  align-items: center;
}

.fitb-input-row .input {
  font-size: 1.1rem;
  font-family: 'Outfit', sans-serif;
}

/* Exercise results */
.exercise-result {
  text-align: center;
  padding: var(--space-3xl) var(--space-lg);
}

.result-score {
  font-family: 'Outfit', sans-serif;
  font-size: 5rem;
  font-weight: 800;
  background: linear-gradient(135deg, #5cc3e8, #79ceb8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: var(--space-sm);
}

.result-message {
  font-size: 1.2rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-xl);
}

/* ── Notification Toast ── */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  /* Use the theme-aware card token so toasts respect dark mode. A subtle
     left accent (set per-type below) carries the status colour. */
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-left: 3px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  font-size: 0.9rem;
  color: var(--text-primary);
  min-width: 260px;
  max-width: 360px;
  animation: slideInRight 0.3s ease, fadeOut 0.3s ease 2.7s forwards;
}

.toast-success { border-left-color: var(--mint); }
.toast-error   { border-left-color: var(--coral); }
.toast-info    { border-left-color: var(--sky-blue); }

@keyframes slideInRight {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes fadeOut {
  to { opacity: 0; transform: translateX(20px); }
}

/* ═══════════════════════════════════════════════════════════════
   DESIGN REFINEMENTS — less-is-more, brand-only, theme-aware
   ═══════════════════════════════════════════════════════════════ */

/* Consistent brand focus ring for keyboard users (a11y). Mouse clicks
   don't get the ring thanks to :focus-visible. */
:where(a, button, input, textarea, select, [tabindex]):focus-visible {
  outline: 2px solid var(--sky-blue);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Skeleton shimmer for loading placeholders (replaces plain "Loading…"
   text). Apply .skeleton to any block; it animates a brand-tinted sweep. */
.skeleton {
  position: relative;
  overflow: hidden;
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  color: transparent !important;
  min-height: 1em;
}
.skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, rgba(92, 195, 232, 0.14), transparent);
  animation: shimmer 1.3s infinite;
}
@keyframes shimmer { to { transform: translateX(100%); } }

/* The leaderboard "Loading scoreboard…" row → soft shimmering rows. */
.leaderboard-item.loading {
  color: var(--text-muted);
  background: var(--bg-tertiary);
  border-radius: var(--radius-sm);
  position: relative;
  overflow: hidden;
}
.leaderboard-item.loading::after {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, rgba(92, 195, 232, 0.12), transparent);
  animation: shimmer 1.3s infinite;
}

@media (prefers-reduced-motion: reduce) {
  .skeleton::after, .leaderboard-item.loading::after { animation: none; }
}

/* First-run onboarding (UX-01) — brand, minimal, three steps. */
.onboard-steps { display: flex; flex-direction: column; gap: 14px; margin-bottom: 20px; }
.onboard-step { display: flex; gap: 14px; align-items: flex-start; }
.onboard-emoji {
  flex: 0 0 44px; height: 44px; width: 44px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; border-radius: var(--radius-md);
  background: var(--accent-blue-soft); border: 1px solid var(--border-accent);
}
.onboard-step-title { font-family: 'Outfit', sans-serif; font-weight: 700; font-size: 0.98rem; color: var(--text-primary); }
.onboard-step-text { margin: 2px 0 0; font-size: 0.86rem; line-height: 1.5; color: var(--text-secondary); }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-hover); }

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE — Intermediate Laptop/Tablet (≤ 1200px)
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 1200px) {
  .navbar-inner {
    gap: var(--space-md);
  }
  .logo-text {
    font-size: 1.1rem;
  }
  .nav-tabs {
    gap: 2px;
  }
  .nav-tab {
    padding: 6px 10px;
    font-size: 0.8rem;
    gap: 4px;
  }
  .nav-stats {
    gap: 6px;
  }
  .stat-pill {
    padding: 4px 8px;
    font-size: 0.75rem;
  }
  .provider-badge {
    display: none;
  }
}

@media (max-width: 1120px) {
  .stat-pill span:nth-child(3) {
    display: none;
  }
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE — Tablet (≤ 900px)
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 900px) {
  .settings-grid {
    grid-template-columns: 1fr;
  }
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE — Tablet & Mobile (≤ 1024px)
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 1024px) {

  /* ── Typography ── */
  h1, .section-title { font-size: 1.55rem; }
  h2 { font-size: 1.3rem; }
  .section-subtitle { font-size: 0.85rem; }

  /* ── Layout ── */
  .container {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }

  .main-content {
    padding-bottom: 80px; /* clear the mobile nav */
  }

  /* ── Navbar ── */
  .nav-tabs     { display: none; }
  .nav-stats    { display: none; }
  .mobile-nav   { display: flex !important; }
  /* Keep the settings cog accessible on mobile */
  #settings-btn { display: flex !important; }

  .navbar-inner {
    justify-content: space-between;
  }

  /* ── Section headers ── */
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }
  .section-header > .btn {
    width: 100%;
    justify-content: center;
  }

  /* ── Translator ── */
  .translator-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  .translator-textarea {
    min-height: 110px;
    font-size: 1rem;
  }
  .translator-panel {
    border-radius: var(--radius-lg);
  }

  /* Synonym row — wrap nicely */
  .synonym-row {
    padding: var(--space-sm) var(--space-md);
    gap: 6px;
  }
  .synonym-chips {
    gap: 5px;
  }
  .synonym-chip {
    font-size: 0.78rem;
    padding: 3px 9px;
  }

  /* Level variations — 2 columns on mobile */
  .level-cards-grid {
    grid-template-columns: 1fr 1fr;
  }

  /* ── Recent list ── */
  .recent-item {
    flex-wrap: wrap;
    gap: 4px;
  }
  .recent-time { margin-left: auto; }

  /* ── Word Bank ── */
  .wordbank-controls {
    flex-direction: column;
    gap: var(--space-sm);
  }
  .filter-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding-bottom: 4px;
  }
  .filter-pills::-webkit-scrollbar { display: none; }
  .filter-pill {
    flex-shrink: 0;
    font-size: 0.78rem;
    padding: 5px 12px;
    white-space: nowrap;
  }
  .word-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
  .word-card {
    padding: var(--space-md);
  }


  /* MC options */
  .mc-options {
    grid-template-columns: 1fr;
  }

  /* Flashcard */
  .flashcard-scene {
    height: 220px;
  }
  .flashcard-word {
    font-size: 1.5rem;
  }
  .flashcard-controls {
    flex-direction: row;
    gap: var(--space-sm);
  }
  .flashcard-controls .btn {
    flex: 1;
    font-size: 0.85rem;
    padding: var(--space-sm) var(--space-md);
  }

  /* ── Insights ── */
  .insights-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
  }
  .stat-card {
    padding: var(--space-md);
  }
  .stat-card-value { font-size: 1.8rem; }

  .insights-row {
    grid-template-columns: 1fr;
  }

  /* Streak calendar — smaller dots */
  .streak-day {
    width: 10px;
    height: 10px;
    border-radius: 2px;
  }

  /* ── Backend/Settings page ── */
  .settings-grid {
    grid-template-columns: 1fr;
  }
  .settings-page-card-header {
    flex-wrap: wrap;
    gap: var(--space-sm);
  }
  .settings-api-row {
    grid-template-columns: 1fr;
  }
  .data-actions-grid {
    grid-template-columns: 1fr 1fr;
  }
  .code-steps { gap: var(--space-sm); }

  /* ── Settings drawer ── */
  .settings-drawer {
    width: 100vw;
    right: -100vw;
  }

  /* ── Toasts ── */
  .toast-container {
    left: var(--space-md);
    right: var(--space-md);
    bottom: 80px;  /* above mobile nav */
  }
  .toast {
    min-width: unset;
    width: 100%;
  }

  /* ── Exercise result ── */
  .result-score { font-size: 3.5rem; }
  .exercise-result { padding: var(--space-lg); }

  /* ── Cards ── */
  .card { padding: var(--space-lg); }
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE — Small phones (≤ 480px)
   ═══════════════════════════════════════════════════════════════ */
@media (max-width: 480px) {

  .container {
    padding-left: 12px;
    padding-right: 12px;
  }

  .section-title { font-size: 1.3rem; }

  /* Translator textarea even shorter */
  .translator-textarea { min-height: 90px; }

  /* Level variations — single column on very small phones */
  .level-cards-grid { grid-template-columns: 1fr; }

  /* Word card compact */
  .word-card-de { font-size: 1.1rem; }

  /* Insights — single column on tiny phones */
  .insights-grid { grid-template-columns: 1fr 1fr; }

  /* Flashcard smaller */
  .flashcard-scene { height: 190px; }
  .flashcard-word  { font-size: 1.25rem; }

  /* Bottom mobile nav labels smaller */
  .mobile-nav-btn { font-size: 0.6rem; gap: 2px; }
  .mobile-nav-btn svg { width: 20px; height: 20px; }

  /* Backend status banner stacks */
  .backend-status-banner { flex-direction: column; text-align: center; }

  /* Exercise mode cards */
  .exercise-mode-card { padding: var(--space-md); }
  .exercise-mode-title { font-size: 1rem; }
  .exercise-mode-desc  { font-size: 0.82rem; }

  /* Data action grid single column */
  .data-actions-grid { grid-template-columns: 1fr; }
}

/* Mobile bottom nav */
.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid var(--border);
  box-shadow: 0 -4px 20px rgba(30, 40, 100, 0.08);
  padding: 8px 0 calc(8px + env(safe-area-inset-bottom));
  z-index: 100;
}

.mobile-nav-inner {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  justify-items: center;
  width: 100%;
}

.mobile-nav-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 6px 1px;
  border: none;
  background: transparent;
  color: var(--text-muted);
  font-size: 0.58rem;
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: color var(--transition-base);
  width: 100%;
  text-align: center;
  white-space: nowrap;
}

.mobile-nav-btn svg {
  width: 20px;
  height: 20px;
}

.mobile-nav-btn.active {
  color: var(--sky-blue);
}

/* ── Utility ── */
.hidden { display: none !important; }
.flex { display: flex; }
.items-center { align-items: center; }
.gap-sm { gap: var(--space-sm); }
.gap-md { gap: var(--space-md); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.text-cyan { color: var(--sky-blue); }
.text-gold { color: var(--sunshine); }
.text-muted { color: var(--text-muted); }
.text-center { text-align: center; }
.font-heading { font-family: 'Outfit', sans-serif; }
.w-full { width: 100%; }

/* ── Translation animation ── */
@keyframes translateIn {
  from { opacity: 0; transform: translateY(6px); }
  to   { opacity: 1; transform: translateY(0); }
}
.translation-animated {
  animation: translateIn 0.3s ease;
  font-family: 'Outfit', sans-serif;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  padding: var(--space-lg);
  line-height: 1.3;
}
.result-text {
  padding: var(--space-lg);
  font-family: 'Outfit', sans-serif;
  font-size: 1.1rem;
  color: var(--text-primary);
}
.result-empty {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--text-muted);
  font-size: 0.95rem;
  padding: var(--space-xl);
}
.result-empty svg { width: 20px; height: 20px; opacity: 0.4; }
.result-loading {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xl);
  color: var(--text-muted);
}

/* ── Provider badge (navbar) ── */
.provider-badge {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: rgba(92, 195, 232, 0.1);
  color: #0089cc;
  border: 1px solid rgba(92, 195, 232, 0.25);
  white-space: nowrap;
}

/* ── Synonym row ── */
.synonym-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-lg);
  border-top: 1px solid var(--border);
  background: rgba(92, 195, 232, 0.03);
}
.synonym-label {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  white-space: nowrap;
}
.synonym-chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  flex: 1;
}
.synonym-chip {
  padding: 4px 10px;
  font-size: 0.82rem;
  font-family: 'Outfit', sans-serif;
  font-weight: 500;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  box-shadow: var(--shadow-sm);
}
.synonym-chip:hover {
  border-color: rgba(92, 195, 232, 0.4);
  background: rgba(92, 195, 232, 0.07);
  color: #0089cc;
  transform: translateY(-1px);
}
.synonym-chip.active {
  border-color: #5cc3e8;
  background: rgba(92, 195, 232, 0.12);
  color: #0089cc;
  font-weight: 600;
}

/* ── Level variations ── */
.level-var-toggle {
  width: 100%;
  text-align: center;
  font-size: 0.8rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  border-radius: 0;
  padding: var(--space-sm) var(--space-lg);
  transition: color var(--transition-fast), background var(--transition-fast);
}
.level-var-toggle:hover { color: #0089cc; background: rgba(92, 195, 232,0.04); }

.level-variations-panel {
  border-top: 1px solid var(--border);
  padding: var(--space-lg);
  background: rgba(0,0,0,0.02);
}
.level-variations-header {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  margin-bottom: var(--space-md);
}
.lv-note {
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--text-muted);
  text-transform: none;
  letter-spacing: 0;
  margin-left: auto;
}
.level-cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-sm);
}
@media (max-width: 700px) {
  .level-cards-grid { grid-template-columns: repeat(2, 1fr); }
}
.level-card {
  border: 1px solid rgba(0,0,0,0.1);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  background: var(--bg-secondary);
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.level-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-md); }
.level-card-current { box-shadow: var(--shadow-sm); }
.level-card-badge {
  font-family: 'Outfit', sans-serif;
  font-size: 0.85rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
}
.lv-current-tag {
  font-size: 0.65rem;
  font-weight: 600;
  background: rgba(0,0,0,0.07);
  border-radius: 4px;
  padding: 1px 5px;
  color: var(--text-muted);
  text-transform: uppercase;
}
.level-card-translation {
  font-family: 'Outfit', sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  word-break: break-word;
}
.level-card-desc {
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.4;
}
.level-card-note {
  font-size: 0.7rem;
  color: var(--text-muted);
  font-style: italic;
}
.level-card-use {
  margin-top: auto;
  font-size: 0.75rem;
  color: #0089cc;
  padding: 4px 8px;
  border-radius: var(--radius-sm);
}
.level-card-use:hover { background: rgba(92, 195, 232,0.08); }

/* ── Settings drawer ── */
.settings-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(18, 21, 46, 0.35);
  backdrop-filter: blur(3px);
  z-index: 200;
}
.settings-overlay.open { display: block; }

.settings-drawer {
  position: fixed;
  top: 0;
  right: -420px;
  width: 380px;
  max-width: 100vw;
  height: 100vh;
  background: var(--bg-secondary);
  box-shadow: var(--shadow-lg);
  z-index: 201;
  display: flex;
  flex-direction: column;
  transition: right var(--transition-slow) cubic-bezier(0.4, 0, 0.2, 1);
  overflow: hidden;
}
.settings-drawer.open { right: 0; }

.settings-drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg);
  border-bottom: 1px solid var(--border);
  background: rgba(92, 195, 232, 0.04);
}
.settings-drawer-title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-primary);
}
.settings-drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}
.settings-status-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  background: rgba(92, 195, 232, 0.07);
  border: 1px solid rgba(92, 195, 232, 0.2);
  font-size: 0.82rem;
  color: #0089cc;
  font-weight: 500;
}
.settings-status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #5cc3e8;
  flex-shrink: 0;
}
.settings-status-dot.error { background: #e95f5c; }
.settings-status-dot.warn  { background: #ffdb00; }

.settings-section {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  background: #fafbff;
}
.settings-section-title {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.settings-section-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: var(--space-md);
  line-height: 1.5;
}
.settings-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.settings-help-link {
  font-size: 0.75rem;
  color: #0089cc;
  text-decoration: none;
  font-weight: 400;
}
.settings-help-link:hover { text-decoration: underline; }
.settings-input-wrap {
  display: flex;
  gap: 6px;
  align-items: center;
}
.settings-input-wrap .input { flex: 1; }
.firebase-status-row {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  padding: var(--space-sm) var(--space-md);
  background: rgba(0,0,0,0.03);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

/* ── Backend / Settings page ── */
.settings-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(460px, 1fr));
  gap: var(--space-lg);
}
@media (max-width: 600px) { .settings-grid { grid-template-columns: 1fr; } }

.settings-page-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.settings-page-card-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-lg);
  border-bottom: 1px solid var(--border);
  background: rgba(92, 195, 232, 0.03);
}
.settings-page-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
}
.settings-page-card-title {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-primary);
  margin: 0;          /* reset default <h3> margins — these are real headings now */
  line-height: 1.3;
}
.settings-page-card-sub { font-size: 0.78rem; color: var(--text-muted); margin-top: 2px; }
.settings-explainer {
  margin: 0 0 var(--space-md);
  padding: 12px 14px;
  background: var(--accent-blue-soft);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-md);
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--text-secondary);
}
.settings-explainer strong { color: var(--text-primary); }
.settings-api-badge {
  margin-left: auto;
  flex-shrink: 0;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  background: var(--bg-tertiary);
  color: var(--text-muted);
  border: 1px solid transparent;
  transition: background 0.2s, color 0.2s, border-color 0.2s;
}
.settings-api-badge.badge--active {
  background: var(--accent-green-soft);
  color: var(--accent-green);
  border-color: rgba(121,206,184, 0.3);
}
.settings-api-badge.badge--warning {
  background: var(--accent-gold-soft);
  color: #a08000;
  border-color: rgba(255,219,0, 0.35);
}
.settings-api-badge.badge--danger {
  background: var(--accent-red-soft);
  color: var(--accent-red);
  border-color: rgba(233,95,92, 0.3);
}
.settings-api-badge.badge--disabled {
  background: rgba(0, 0, 0, 0.05);
  color: var(--text-muted);
  border-color: transparent;
}
.settings-form {
  padding: var(--space-lg);
}
.settings-form-row { margin-bottom: var(--space-md); }
.settings-api-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  margin-top: var(--space-md);
}
@media (max-width: 700px) { .settings-api-row { grid-template-columns: 1fr; } }
.settings-api-item {
  background: rgba(0,0,0,0.02);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}
.settings-api-name {
  display: flex;
  align-items: center;
  gap: 6px;
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 6px;
  color: var(--text-primary);
}
.settings-api-status {
  margin-left: auto;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-muted);
}
.settings-api-status.active { color: var(--accent-green); }
.settings-api-status.warning { color: var(--accent-gold); }
.settings-api-status.danger { color: var(--accent-red); }
.settings-api-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.5;
}
.settings-api-desc code {
  background: rgba(0,0,0,0.06);
  border-radius: 3px;
  padding: 1px 4px;
  font-size: 0.75rem;
}

/* Firebase env block */
.firebase-env-block {
  background: #f4f6ff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.firebase-env-title {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border);
  background: rgba(92, 195, 232,0.05);
}
.firebase-env-code {
  padding: var(--space-md);
  font-size: 0.78rem;
  color: var(--text-secondary);
  font-family: monospace;
  white-space: pre;
  overflow-x: auto;
  background: transparent;
  line-height: 1.7;
}

/* Data actions */
.data-actions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-sm);
}

/* Code steps */
.code-steps { display: flex; flex-direction: column; gap: var(--space-md); }
.code-step {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}
.code-step-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(92, 195, 232,0.12);
  color: #0089cc;
  font-weight: 700;
  font-size: 0.85rem;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.code-step-label {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
  font-weight: 500;
}
.code-block {
  display: block;
  background: #12152e;
  color: #5cc3e8;
  border-radius: var(--radius-sm);
  padding: var(--space-sm) var(--space-md);
  font-family: monospace;
  font-size: 0.85rem;
  letter-spacing: 0.03em;
}

/* Backend status banner */
.backend-status-banner {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-lg);
  border: 1px solid rgba(92, 195, 232,0.25);
  background: rgba(92, 195, 232,0.06);
  transition: background 0.3s, border-color 0.3s;
}
.backend-status-banner.banner--ok {
  border-color: rgba(121,206,184, 0.35);
  background: rgba(121,206,184, 0.06);
}
.backend-status-banner.banner--err {
  border-color: rgba(233,95,92, 0.35);
  background: rgba(233,95,92, 0.06);
}
.backend-status-icon { font-size: 1.8rem; flex-shrink: 0; }
.backend-status-title { font-family: 'Outfit', sans-serif; font-weight: 700; font-size: 1rem; color: var(--text-primary); }
.backend-status-sub { font-size: 0.8rem; color: var(--text-muted); margin-top: 2px; }
.backend-status-sub code { background: rgba(0,0,0,0.07); border-radius: 3px; padding: 1px 4px; font-size: 0.75rem; }


/* ═══════════════════════════════════════════════════════════════
   AUTH — Login Screen
   ═══════════════════════════════════════════════════════════════ */

.login-screen {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #f4f7f9 0%, #eef3f6 50%, #e5edf0 100%);
  padding: var(--space-lg);
  animation: fadeIn 0.25s ease;
}
.login-screen.hidden { display: none; }

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes cardIn {
  from { opacity: 0; transform: translateY(20px) scale(0.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.login-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  box-shadow: 0 20px 60px rgba(0,0,0,0.10), 0 6px 20px rgba(92, 195, 232,0.08);
  padding: 2.5rem 2rem 2rem;
  max-width: 400px;
  width: 100%;
  text-align: center;
  animation: cardIn 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.login-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}
.login-logo-icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  box-shadow: 0 6px 20px rgba(92, 195, 232, 0.2);
  flex-shrink: 0;
}
.login-logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.3);
}
.login-logo-text {
  font-family: 'Outfit', sans-serif;
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: -0.5px;
}
.login-logo-text span { color: var(--sky-blue); }

.login-tagline {
  font-size: 0.95rem;
  color: var(--text-muted);
  margin-bottom: 1.75rem;
  line-height: 1.6;
}

.login-error {
  background: rgba(233,95,92,0.08);
  border: 1px solid rgba(233,95,92,0.2);
  border-radius: var(--radius-md);
  color: #cc2428;
  font-size: 0.85rem;
  padding: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-md);
  text-align: left;
}

/* Google button — follows official Google branding */
.login-btn-google {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 13px var(--space-lg);
  background: var(--bg-secondary);
  border: 1.5px solid rgba(0,0,0,0.14);
  border-radius: var(--radius-lg);
  font-family: 'Outfit', sans-serif;
  font-size: 0.95rem;
  font-weight: 600;
  color: #3c4043;
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  margin-bottom: var(--space-md);
}
.login-btn-google:hover {
  box-shadow: 0 4px 16px rgba(0,0,0,0.13);
  border-color: rgba(0,0,0,0.2);
  transform: translateY(-1px);
}
.login-btn-google:active { transform: translateY(0); }
.login-btn-google:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.login-divider {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin: var(--space-sm) 0;
  color: var(--text-muted);
  font-size: 0.82rem;
}
.login-divider::before,
.login-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.login-btn-guest {
  width: 100%;
  padding: 12px var(--space-lg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  background: transparent;
  font-family: 'Outfit', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
  margin-bottom: var(--space-md);
}
.login-btn-guest:hover {
  background: rgba(0,0,0,0.03);
  border-color: var(--border-hover);
  transform: translateY(-1px);
}
.login-btn-guest:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }

.login-note {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

/* Spinner inside login button */
.login-spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(0,0,0,0.15);
  border-top-color: #3c4043;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  flex-shrink: 0;
}

/* ── Guest Upgrade Banner ─────────────────────────────────────── */
.guest-banner {
  background: linear-gradient(135deg, rgba(92, 195, 232, 0.08), rgba(121, 206, 184, 0.08));
  border: 1px solid rgba(92, 195, 232, 0.25);
  border-radius: var(--radius-md);
  padding: 10px 16px;
  margin-top: 0;
  margin-bottom: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  font-size: 0.85rem;
  color: var(--text-secondary);
  box-shadow: 0 2px 8px rgba(49, 72, 85, 0.02);
}
.guest-banner.hidden { display: none; }
.guest-banner-text { flex: 1; line-height: 1.4; }
.guest-banner-text strong { color: #0089cc; }

body.dark-theme .guest-banner {
  background: rgba(92, 195, 232, 0.08);
  border-color: rgba(92, 195, 232, 0.2);
  color: var(--text-secondary);
}
body.dark-theme .guest-banner-text strong {
  color: var(--sky-blue);
}

@media (max-width: 576px) {
  .guest-banner {
    flex-direction: column;
    text-align: center;
    padding: 16px;
    gap: 12px;
  }
  .guest-banner button {
    width: 100%;
  }
}

/* ── User Avatar + Dropdown ───────────────────────────────────── */
.nav-user {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: linear-gradient(135deg, #5cc3e8, #79ceb8);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.85rem;
  color: #fff;
  cursor: pointer;
  border: 2px solid rgba(92, 195, 232,0.35);
  overflow: hidden;
  flex-shrink: 0;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  user-select: none;
}
.nav-avatar:hover {
  transform: scale(1.07);
  box-shadow: 0 4px 14px rgba(92, 195, 232,0.3);
}
.nav-avatar img { width: 100%; height: 100%; object-fit: cover; }

@keyframes dropdownIn {
  from { opacity: 0; transform: translateY(-8px); }
  to   { opacity: 1; transform: translateY(0); }
}
.nav-user-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 220px;
  z-index: 500;
  overflow: hidden;
  animation: dropdownIn 0.15s ease;
}
.nav-user-dropdown.hidden { display: none; }

.nav-user-info {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border);
  background: rgba(92, 195, 232,0.03);
}
.nav-user-name  { font-family: 'Outfit', sans-serif; font-weight: 700; font-size: 0.92rem; color: var(--text-primary); }
.nav-user-email { font-size: 0.78rem; color: var(--text-muted); margin-top: 1px; }

.nav-user-badge {
  display: inline-block;
  margin-top: 5px;
  font-size: 0.7rem;
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: 600;
  background: rgba(92, 195, 232,0.1);
  color: #0089cc;
}
.nav-user-badge.guest {
  background: rgba(255,219,0,0.15);
  color: #a08000;
}

.nav-user-actions { padding: var(--space-sm); }

.nav-user-action-btn {
  width: 100%;
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 8px;
  border: none;
  background: transparent;
}
.nav-user-action-btn:hover  { background: rgba(0,0,0,0.04); }
.nav-user-action-btn.danger { color: #cc2428; }
.nav-user-action-btn.danger:hover { background: rgba(233,95,92,0.06); }

/* Environment Modes (Static/Production vs Local Server) */
body.prod-mode .dev-only {
  display: none !important;
}
body.dev-mode .prod-only {
  display: none !important;
}

.settings-api-badge.guest {
  background: rgba(255,219,0,0.15) !important;
  color: #a08000 !important;
  border-color: rgba(255,219,0,0.3) !important;
}

/* Grammatical Article Gender Styling */
.article-masc {
  color: #5cc3e8;
  font-weight: 800;
  text-shadow: 0 0 1px rgba(92, 195, 232,0.15);
}
.article-fem {
  color: #e95f5c;
  font-weight: 800;
  text-shadow: 0 0 1px rgba(233,95,92,0.15);
}
.article-neu {
  color: #79ceb8;
  font-weight: 800;
  text-shadow: 0 0 1px rgba(121,206,184,0.15);
}

/* Pronunciation Speaker Button */
.speaker-btn {
  opacity: 0.65;
  cursor: pointer;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}
.speaker-btn:hover {
  opacity: 1;
  transform: scale(1.15);
  background: rgba(0,0,0,0.04) !important;
}
.speaker-btn:active {
  transform: scale(0.95);
}

/* ── Gamification (XP, Levels, Badges) ── */
.xp-bar-track {
  box-shadow: inset 0 1px 3px rgba(0,0,0,0.06);
}
.xp-bar-fill {
  box-shadow: 0 2px 6px rgba(103,58,183,0.3);
}

/* Badge Gallery Card */
.badges-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.badge-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem 0.75rem;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  position: relative;
  box-shadow: var(--shadow-sm);
}

.badge-item.unlocked {
  border-color: rgba(255,219,0, 0.35);
  background: linear-gradient(180deg, var(--bg-secondary) 0%, rgba(255,219,0, 0.04) 100%);
}

.badge-item.unlocked:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(255,219,0, 0.15);
  border-color: #ffdb00;
}

.badge-item.locked {
  filter: grayscale(1);
  opacity: 0.55;
  background: #fafafa;
}

.badge-emoji {
  font-size: 2.2rem;
  margin-bottom: 0.5rem;
  filter: drop-shadow(0 4px 6px rgba(0,0,0,0.1));
}

.badge-item.unlocked .badge-emoji {
  animation: floatBadge 3s ease-in-out infinite;
}

@keyframes floatBadge {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-4px); }
}

.badge-name {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 0.85rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.badge-desc {
  font-size: 0.7rem;
  color: var(--text-muted);
  line-height: 1.3;
  margin-bottom: 8px;
  flex: 1;
}

.badge-date {
  font-size: 0.65rem;
  font-weight: 700;
  color: #cda200;
  background: rgba(255,219,0, 0.12);
  padding: 2px 8px;
  border-radius: var(--radius-full);
}

.badge-date.locked-label {
  background: rgba(0,0,0,0.06);
  color: var(--text-muted);
}

/* ── AI Noun/Verb Metadata inside Cards ── */
.word-card-ai-details {
  margin-top: 10px;
  border-top: 1px solid rgba(0,0,0,0.05);
  padding-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.word-card-ai-meta-item {
  font-size: 0.82rem;
  color: var(--text-secondary);
  text-align: left;
}

.word-card-ai-meta-item span {
  font-weight: 600;
  color: var(--text-muted);
  font-size: 0.78rem;
}

.word-card-ai-example {
  margin-top: 6px;
  padding: 8px 12px;
  background: rgba(0, 0, 0, 0.02);
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  text-align: left;
}

.word-card-ai-example .example-de {
  font-size: 0.82rem;
  color: var(--text-primary);
  font-style: italic;
}

.word-card-ai-example .example-en {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ── Custom Dialog Modal overlay ── */
.dd-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(18, 21, 46, 0.55);
  backdrop-filter: blur(4px);
  z-index: 1100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: modalFadeIn 0.2s ease-out;
}

@keyframes modalFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.dd-modal-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-xl);
  box-shadow: 0 24px 70px rgba(18, 21, 46, 0.25);
  width: 100%;
  max-width: 440px;
  overflow: hidden;
  animation: modalSlideUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes modalSlideUp {
  from { transform: translateY(30px) scale(0.95); opacity: 0; }
  to { transform: translateY(0) scale(1); opacity: 1; }
}

.dd-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--border);
  background: rgba(92, 195, 232, 0.04);
}

.dd-modal-title {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text-primary);
}

.dd-modal-close {
  background: transparent;
  border: none;
  font-size: 1.1rem;
  color: var(--text-muted);
  cursor: pointer;
  padding: 4px;
}
.dd-modal-close:hover {
  color: var(--text-primary);
}

.dd-modal-body {
  padding: var(--space-lg);
}

/* ── AI Story Card ── */
.ai-story-card {
  background: linear-gradient(135deg, rgba(92, 195, 232,0.03) 0%, rgba(103,58,183,0.02) 100%);
  border: 1px solid rgba(92, 195, 232, 0.12);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  box-shadow: var(--shadow-sm);
}

.ai-story-card:hover {
  border-color: rgba(92, 195, 232, 0.25);
}

/* ── AI Writing Assistant Card ── */
.ai-writing-assistant {
  margin: 0 var(--space-lg) var(--space-lg) var(--space-lg);
  padding: var(--space-lg);
  background: linear-gradient(135deg, rgba(92,195,232, 0.06), rgba(92, 195, 232, 0.04));
  border: 1px solid rgba(92,195,232, 0.18);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  transition: all var(--transition-base);
}

.ai-writing-assistant-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  border-bottom: 1px solid rgba(92,195,232, 0.12);
  padding-bottom: 8px;
}

.ai-writing-assistant-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--accent-purple);
}

.ai-writing-assistant-body {
  font-size: 0.88rem;
  line-height: 1.5;
  color: var(--text-secondary);
}

.ai-writing-assistant-cefr-badge {
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 0.8rem;
  padding: 4px 8px;
  border-radius: 8px;
  color: #ffffff;
  background: #5cc3e8;
  box-shadow: 0 2px 8px rgba(92,195,232, 0.25);
}

.ai-writing-assistant-better {
  background: var(--bg-secondary);
  border: 1px dashed rgba(92,195,232, 0.22);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  margin-top: 4px;
}

.ai-writing-assistant-better-title {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 4px;
}

.ai-writing-assistant-better-text {
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
}

.ai-writing-assistant-better-explain {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 6px;
  line-height: 1.4;
}

.ai-writing-assistant-improvements {
  margin-top: 4px;
}

.ai-writing-assistant-improvements-title {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 8px;
}

.ai-writing-assistant-improvements-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.ai-writing-assistant-improvement-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-left: 10px;
  border-left: 2px solid var(--accent-blue);
  font-size: 0.85rem;
}

.ai-writing-assistant-improvement-orig {
  text-decoration: line-through;
  color: var(--text-muted);
  font-size: 0.78rem;
}

.ai-writing-assistant-improvement-new {
  font-weight: 600;
  color: var(--text-primary);
}

.ai-writing-assistant-improvement-reason {
  color: var(--text-secondary);
  font-size: 0.8rem;
  margin-top: 2px;
}

/* ── Verb Conjugations Panel ── */
.verb-conjugations-panel {
  margin: 0 var(--space-lg) var(--space-lg) var(--space-lg);
  padding: var(--space-lg);
  background: linear-gradient(135deg, rgba(121,206,184, 0.06), rgba(92, 195, 232, 0.04));
  border: 1px solid rgba(121,206,184, 0.18);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  transition: all var(--transition-base);
}

.verb-conjugations-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-sm);
  border-bottom: 1px solid rgba(121,206,184, 0.12);
  padding-bottom: 8px;
}

.verb-conjugations-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--accent-green);
}

.verb-conjugations-table-wrapper {
  overflow-x: auto;
  width: 100%;
}

.conjugation-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  text-align: left;
}

.conjugation-table th, .conjugation-table td {
  padding: 8px 12px;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.conjugation-table th {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  color: var(--text-secondary);
  background: rgba(0, 0, 0, 0.02);
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.05em;
}

.conjugation-table tr:hover {
  background: rgba(121,206,184, 0.03);
}

.conjugation-pronoun {
  font-weight: 600;
  color: var(--text-muted);
  width: 20%;
}

.conjugation-verb-form {
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  color: var(--text-primary);
}

/* ============================================================
   LIVE COMMUNITY SCORECARD / LEADERBOARD — GAMING STYLE
   ============================================================ */
.live-scorecard-card {
  position: relative;
  overflow: hidden;
  background: linear-gradient(145deg, #1a1a3e 0%, #16213e 60%, #0f3460 100%);
  border: 1px solid rgba(157, 111, 255, 0.25);
  border-radius: 20px;
  padding: 20px;
}

body:not(.dark-theme) .live-scorecard-card {
  background: linear-gradient(145deg, #1a1a3e 0%, #16213e 60%, #0f3460 100%);
  border: 1px solid rgba(157, 111, 255, 0.3);
}

.live-scorecard-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.live-scorecard-card .chart-title {
  color: #ffffff !important;
}

.live-scorecard-card .section-subtitle {
  color: rgba(255,255,255,0.5) !important;
  font-size: 0.82rem;
}

.live-indicator {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.72rem;
  font-weight: 700;
  color: #4ade80;
  background: rgba(74, 222, 128, 0.12);
  padding: 3px 10px;
  border-radius: 99px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 1px solid rgba(74,222,128,0.3);
}

.live-dot {
  width: 7px;
  height: 7px;
  background: #4ade80;
  border-radius: 50%;
  animation: pulseLive 1.5s infinite;
}

@keyframes pulseLive {
  0%   { transform: scale(0.9); opacity: 0.6; }
  50%  { transform: scale(1.3); opacity: 1; box-shadow: 0 0 8px #4ade80; }
  100% { transform: scale(0.9); opacity: 0.6; }
}

/* ── Loading State ── */
.lb-loading {
  text-align: center;
  padding: 2.5rem 1rem;
  color: rgba(255,255,255,0.4);
  font-size: 0.9rem;
}

/* ── Podium (Top 3) ── */
.lb-podium {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 10px;
  padding: 16px 0 8px;
}

.lb-podium-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  flex: 1;
  max-width: 110px;
  position: relative;
}

.lb-podium-first {
  transform: translateY(-12px);
}

.lb-podium-top {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}

.lb-podium-medal {
  font-size: 1.35rem;
  line-height: 1;
  filter: drop-shadow(0 2px 4px rgba(0,0,0,0.5));
}

.lb-podium-av-wrap {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  overflow: hidden;
  border: 2.5px solid rgba(255,255,255,0.2);
  flex-shrink: 0;
  position: relative;
}

.lb-podium-first .lb-podium-av-wrap {
  width: 68px;
  height: 68px;
}

.lb-first-ring {
  border-color: #FFD700;
  box-shadow: 0 0 0 3px rgba(255,215,0,0.25), 0 0 20px rgba(255,215,0,0.2);
}

/* Avatar shared */
.lb-avatar-img,
.lb-avatar-letter {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  object-fit: cover;
}

.lb-avatar-letter {
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 1rem;
  color: #fff;
  background: linear-gradient(135deg, #9d6fff, #5c74ff);
}

.lb-podium-first .lb-avatar-letter {
  font-size: 1.2rem;
}

.lbav-lg { font-size: 1rem; }
.lbav-sm { font-size: 0.85rem; }

.lb-avatar-img.lbav-lg, .lb-avatar-img.lbav-sm {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.lb-podium-info {
  text-align: center;
}

.lb-podium-name {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 0.82rem;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 95px;
  line-height: 1.2;
}

.lb-podium-xp {
  font-size: 0.72rem;
  font-weight: 600;
  color: #4ade80;
  margin-top: 2px;
}

.lb-podium-badge {
  font-family: 'Outfit', sans-serif;
  font-size: 0.65rem;
  font-weight: 800;
  color: var(--mc, #fff);
  border: 1.5px solid var(--mc, rgba(255,255,255,0.3));
  border-radius: 6px;
  padding: 2px 7px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.lb-you {
  font-size: 0.65rem;
  font-weight: 700;
  color: #9d6fff;
  vertical-align: middle;
  background: rgba(157,111,255,0.15);
  padding: 1px 5px;
  border-radius: 4px;
}

.lb-podium-you .lb-podium-av-wrap {
  border-color: #9d6fff;
  box-shadow: 0 0 0 3px rgba(157,111,255,0.25);
}

/* ── Ranked List (4th+) ── */
.lb-ranked-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 12px;
  border-top: 1px solid rgba(255,255,255,0.07);
  padding-top: 12px;
}

.lb-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 10px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.07);
  border-radius: 12px;
  transition: background 0.2s, transform 0.15s;
}

.lb-row:hover {
  background: rgba(255,255,255,0.09);
  transform: translateX(3px);
}

.lb-row-you {
  background: rgba(157,111,255,0.12);
  border-color: rgba(157,111,255,0.35);
}

.lb-row-rank {
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.4);
  width: 22px;
  flex-shrink: 0;
  text-align: right;
}

.lb-row-av {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  border: 1.5px solid rgba(255,255,255,0.12);
}

.lb-row-you .lb-row-av {
  border-color: rgba(157,111,255,0.5);
}

.lb-row-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.lb-row-name {
  font-weight: 600;
  font-size: 0.87rem;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.lb-row-xp {
  font-size: 0.73rem;
  font-weight: 600;
  color: #4ade80;
}

.lb-row-badge {
  font-family: 'Outfit', sans-serif;
  font-size: 0.65rem;
  font-weight: 800;
  color: rgba(255,255,255,0.35);
  border: 1.5px solid rgba(255,255,255,0.15);
  border-radius: 6px;
  padding: 2px 7px;
  flex-shrink: 0;
  letter-spacing: 0.03em;
}

.lb-row-you .lb-row-badge {
  color: #9d6fff;
  border-color: rgba(157,111,255,0.45);
}

/* ── XP flash animation ── */
.score-increase { animation: flashGreen 1s ease-out; }

@keyframes flashGreen {
  0%   { color: #4ade80; transform: scale(1.1); }
  100% { color: #4ade80; transform: scale(1); }
}

/* ── Mobile ── */
@media (max-width: 480px) {
  .lb-podium { gap: 6px; padding: 10px 0 6px; }
  .lb-podium-card { max-width: 90px; }
  .lb-podium-av-wrap { width: 46px; height: 46px; }
  .lb-podium-first .lb-podium-av-wrap { width: 56px; height: 56px; }
  .lb-podium-name { font-size: 0.76rem; max-width: 80px; }
  .lb-row { padding: 7px 8px; gap: 8px; }
  .lb-row-av { width: 30px; height: 30px; }
  .lb-row-name { font-size: 0.82rem; }
}


/* ═══════════════════════════════════════════════════════════════
   DARK THEME OVERRIDES (Brand Navy Palette)
   ═══════════════════════════════════════════════════════════════ */
body.dark-theme, html.dark-theme {
  --bg-primary: #1e2c34;
  --bg-secondary: #273842;
  --bg-tertiary: #19252c;
  --bg-card: rgba(39, 56, 66, 0.98);
  --bg-card-hover: #2e414c;
  --bg-navbar: rgba(30, 44, 52, 0.9);
  
  --text-primary: #ffffff;
  --text-secondary: #c2d1db;
  --text-muted: #8ea1b0;
  --text-accent: var(--sky-blue);
  
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(255, 255, 255, 0.15);
  --border-accent: rgba(92, 195, 232, 0.45);
}

body.dark-theme {
  background: var(--bg-primary);
  color: var(--text-primary);
}

body.dark-theme::before {
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
}

body.dark-theme::after {
  background: radial-gradient(circle, rgba(255,219,0, 0.06) 0%, transparent 70%);
}

body.dark-theme .navbar {
  background: var(--bg-navbar);
  border-color: var(--border);
}

body.dark-theme .select option,
body.dark-theme .settings-page-card,
body.dark-theme .modal-content,
body.dark-theme .drawer-content,
body.dark-theme .results-card,
body.dark-theme .exercise-card,
body.dark-theme .word-card,
body.dark-theme .stats-card,
body.dark-theme .chart-card,
body.dark-theme .nav-tabs,
body.dark-theme .mobile-nav,
body.dark-theme .settings-drawer {
  background: var(--bg-secondary) !important;
  color: var(--text-primary) !important;
  border-color: var(--border) !important;
}

body.dark-theme .settings-page-card-header {
  background: rgba(255, 255, 255, 0.02) !important;
  border-color: var(--border) !important;
}

body.dark-theme .settings-api-item {
  background: rgba(255, 255, 255, 0.02);
  border-color: var(--border);
}

body.dark-theme .input,
body.dark-theme .textarea,
body.dark-theme .select {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  border-color: var(--border);
}

body.dark-theme .input:focus,
body.dark-theme .textarea:focus,
body.dark-theme .select:focus {
  background: rgba(92, 195, 232, 0.06);
  border-color: var(--accent-blue);
}

body.dark-theme p,
body.dark-theme .section-subtitle,
body.dark-theme .settings-page-card-sub,
body.dark-theme .settings-label,
body.dark-theme .settings-api-desc,
body.dark-theme #settings-page-sync-desc {
  color: var(--text-secondary) !important;
}

body.dark-theme h1,
body.dark-theme h2,
body.dark-theme h3,
body.dark-theme h4,
body.dark-theme h5,
body.dark-theme .settings-page-card-title,
body.dark-theme .logo-text,
body.dark-theme #settings-page-user-name {
  color: var(--text-primary) !important;
}

body.dark-theme .nav-tab {
  color: var(--text-secondary);
}
body.dark-theme .nav-tab:hover {
  color: var(--text-primary);
  background: var(--bg-card-hover);
}
body.dark-theme .nav-tab.active {
  background: var(--sky-blue) !important;
  color: #ffffff !important;
}

body.dark-theme .mobile-nav-btn {
  color: var(--text-muted);
}
body.dark-theme .mobile-nav-btn.active {
  color: var(--sky-blue);
}

body.dark-theme ::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
}

/* ── Sentence Auditor ── */
.auditor-area {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.auditor-textarea-wrap {
  position: relative;
  width: 100%;
}

.auditor-textarea {
  width: 100%;
  height: 120px;
  padding: var(--space-md);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-lg);
  font-family: inherit;
  font-size: 1rem;
  background: var(--bg-card);
  color: var(--text-primary);
  resize: vertical;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.auditor-textarea:focus {
  border-color: var(--sky-blue);
  box-shadow: 0 0 0 3px rgba(92, 195, 232, 0.15);
}

.auditor-warning-card {
  background: rgba(233, 95, 92, 0.06);
  border: 1px solid rgba(233, 95, 92, 0.18);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  color: var(--text-secondary);
  font-size: 0.9rem;
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-top: var(--space-sm);
}

.auditor-warning-card strong {
  color: var(--accent-red);
}

.auditor-result-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-lg);
  margin-top: var(--space-md);
}

.auditor-result-card.perfect {
  border-color: var(--mint);
  background: rgba(121, 206, 184, 0.03);
}

.auditor-result-card.imperfect {
  border-color: var(--border);
}

.auditor-sentence-display {
  font-size: 1.2rem;
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  margin: var(--space-sm) 0;
  line-height: 1.4;
}

.auditor-sentence-original {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin-bottom: var(--space-xs);
  text-decoration: line-through;
  opacity: 0.7;
}

.auditor-sentence-corrected {
  color: var(--mint);
}

.auditor-mistakes-title {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
  color: var(--text-primary);
}

.auditor-mistake-item {
  border-left: 3.5px solid var(--accent-red);
  background: rgba(233, 95, 92, 0.02);
  padding: var(--space-md);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-bottom: var(--space-sm);
  border-top: 1px solid var(--border);
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

body.dark-theme .auditor-mistake-item {
  background: rgba(233, 95, 92, 0.05);
}

.auditor-diff-grid {
  display: flex;
  gap: var(--space-md);
  font-size: 0.9rem;
  margin-bottom: var(--space-xs);
  flex-wrap: wrap;
}

.auditor-diff-wrong {
  color: var(--accent-red);
  font-weight: 600;
}

.auditor-diff-right {
  color: var(--mint);
  font-weight: 600;
}


.auditor-mistake-exp {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.45;
}

/* ============================================================
   EXERCISE PICKER — Duolingo-style lesson cards
   ============================================================ */
.exercise-mode-picker {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 14px;
  margin-bottom: var(--space-xl);
}

.exercise-mode-card {
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: 18px;
  padding: 20px 18px;
  text-align: center;
  cursor: pointer;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s;
  display: flex;
  flex-direction: column;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.exercise-mode-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--card-accent, transparent);
  opacity: 0.07;
  pointer-events: none;
  border-radius: inherit;
}

.exercise-mode-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(0,0,0,0.12);
  border-color: var(--card-accent-border, rgba(92,195,232,0.4));
}

.exercise-mode-card[data-accent="green"] { --card-accent: #22c55e; --card-accent-border: rgba(34,197,94,0.4); }
.exercise-mode-card[data-accent="blue"]  { --card-accent: #5cc3e8; --card-accent-border: rgba(92,195,232,0.4); }
.exercise-mode-card[data-accent="purple"]{ --card-accent: #9d6fff; --card-accent-border: rgba(157,111,255,0.4); }
.exercise-mode-card[data-accent="orange"]{ --card-accent: #f97316; --card-accent-border: rgba(249,115,22,0.4); }
.exercise-mode-card[data-accent="pink"]  { --card-accent: #ec4899; --card-accent-border: rgba(236,72,153,0.4); }
.exercise-mode-card[data-accent="teal"]  { --card-accent: #14b8a6; --card-accent-border: rgba(20,184,166,0.4); }

.exercise-mode-card.card-soon {
  opacity: 0.65;
  cursor: default;
}

.exercise-mode-card.card-soon:hover {
  transform: none;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.exercise-mode-icon {
  font-size: 2.4rem;
  margin-bottom: 10px;
  display: block;
  line-height: 1;
  color: var(--card-accent, var(--primary));
}

.exercise-mode-icon svg {
  width: 38px;
  height: 38px;
  display: block;
  margin: 0 auto;
  stroke: currentColor;
  fill: none;
}

.exercise-mode-title {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 5px;
  color: var(--text-primary);
}

.exercise-mode-desc {
  font-size: 0.78rem;
  color: var(--text-muted);
  line-height: 1.4;
  flex: 1;
}

.exercise-card-count {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin: 8px 0 0;
  font-weight: 500;
}

.exercise-card-soon-tag {
  font-size: 0.62rem;
  font-weight: 700;
  background: rgba(157,111,255,0.12);
  color: #9d6fff;
  border: 1px solid rgba(157,111,255,0.25);
  border-radius: 99px;
  padding: 2px 8px;
  margin-top: 8px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ============================================================
   WORD ARRANGEMENT EXERCISE
   ============================================================ */
.wa-container {
  max-width: 520px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
  padding: var(--space-xl) 0;
}

.wa-progress-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.wa-header-label {
  text-align: center;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.wa-phrase-prompt {
  text-align: center;
}

.wa-phrase-speaker-btn {
  background: none;
  border: none;
  font-size: 1.4rem;
  cursor: pointer;
  margin-bottom: 8px;
  display: block;
  margin-left: auto;
  margin-right: auto;
  transition: transform 0.15s;
}

.wa-phrase-speaker-btn:hover { transform: scale(1.2); }

.wa-phrase-text {
  font-family: 'Outfit', sans-serif;
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  text-align: center;
}

/* Answer drop zone */
.wa-answer-zone {
  min-height: 62px;
  border: 2px dashed var(--border);
  border-radius: 14px;
  padding: 10px 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  justify-content: flex-start;
  background: var(--bg-secondary);
  transition: border-color 0.2s;
}

.wa-answer-zone.has-tiles {
  border-style: solid;
  border-color: rgba(92,195,232,0.35);
}

/* Word tiles */
.word-tile {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: 10px;
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--text-primary);
  cursor: pointer;
  user-select: none;
  transition: transform 0.12s, box-shadow 0.12s, background 0.12s, border-color 0.12s, opacity 0.12s;
  box-shadow: 0 2px 6px rgba(0,0,0,0.07);
}

.word-tile:hover {
  transform: translateY(-2px);
  box-shadow: 0 5px 14px rgba(0,0,0,0.12);
  border-color: #5cc3e8;
}

.word-tile.tile-in-answer {
  background: rgba(92,195,232,0.1);
  border-color: rgba(92,195,232,0.5);
}

.word-tile.tile-used {
  opacity: 0;
  pointer-events: none;
}

.word-tile.tile-correct {
  background: rgba(34,197,94,0.12);
  border-color: rgba(34,197,94,0.5);
  color: #16a34a;
}

.word-tile.tile-wrong {
  background: rgba(239,68,68,0.12);
  border-color: rgba(239,68,68,0.5);
  color: #dc2626;
}

/* Pool of tiles */
.wa-tile-pool {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  padding: 14px;
  background: rgba(0,0,0,0.025);
  border-radius: 14px;
  border: 1px solid var(--border);
  min-height: 50px;
}

/* ============================================================
   MATCH EXERCISE
   ============================================================ */
.match-container {
  max-width: 480px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: var(--space-xl) 0;
}

.match-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.match-timer {
  font-family: 'Outfit', sans-serif;
  font-size: 1.25rem;
  font-weight: 800;
  color: #9d6fff;
  letter-spacing: 0.05em;
}

.match-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.match-tile {
  aspect-ratio: 1.15 / 1;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 8px;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: 14px;
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--text-primary);
  cursor: pointer;
  user-select: none;
  transition: background 0.15s, border-color 0.15s, transform 0.15s, opacity 0.2s;
  box-shadow: 0 1px 4px rgba(0,0,0,0.07);
  line-height: 1.3;
}

.match-tile:hover:not(.tile-matched):not(.tile-selected-wrong) {
  border-color: #9d6fff;
  transform: scale(1.04);
}

.match-tile.tile-selected {
  background: rgba(157,111,255,0.15);
  border-color: #9d6fff;
  transform: scale(1.05);
  box-shadow: 0 4px 14px rgba(157,111,255,0.25);
}

.match-tile.tile-selected-wrong {
  background: rgba(239,68,68,0.15);
  border-color: #ef4444;
  animation: shakeWrong 0.4s ease;
}

@keyframes shakeWrong {
  0%,100% { transform: translateX(0); }
  20%      { transform: translateX(-6px); }
  60%      { transform: translateX(6px); }
}

.match-tile.tile-matched {
  background: rgba(34,197,94,0.15);
  border-color: rgba(34,197,94,0.5);
  color: #16a34a;
  cursor: default;
  opacity: 0.7;
}

.match-tile.tile-matched:hover {
  transform: none;
}

/* Match completion */
.match-complete {
  text-align: center;
  padding: 2rem 1rem;
}

.match-complete-emoji {
  font-size: 3.5rem;
  margin-bottom: 12px;
}

.match-complete-time {
  font-family: 'Outfit', sans-serif;
  font-size: 2rem;
  font-weight: 800;
  color: #9d6fff;
  margin-bottom: 8px;
}

.match-complete-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

/* ============================================================
   EXERCISE FEEDBACK BAR (Duolingo-style slide-up)
   ============================================================ */
.exercise-feedback-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 1200;
  padding: 16px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  border-top-left-radius: 20px;
  border-top-right-radius: 20px;
}

.exercise-feedback-bar.fb-visible {
  transform: translateY(0);
}

.exercise-feedback-bar.fb-correct {
  background: #f0fdf4;
  border-top: 3px solid #22c55e;
}

.exercise-feedback-bar.fb-wrong {
  background: #fff1f2;
  border-top: 3px solid #ef4444;
}

body.dark-theme .exercise-feedback-bar.fb-correct {
  background: rgba(34,197,94,0.12);
}

body.dark-theme .exercise-feedback-bar.fb-wrong {
  background: rgba(239,68,68,0.1);
}

.fb-top-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.fb-emoji {
  font-size: 2rem;
  line-height: 1;
  flex-shrink: 0;
}

.fb-title {
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 1.1rem;
}

.exercise-feedback-bar.fb-correct .fb-title { color: #16a34a; }
.exercise-feedback-bar.fb-wrong  .fb-title { color: #dc2626; }

.fb-detail {
  font-size: 0.85rem;
  color: var(--text-secondary);
  padding-left: 44px;
}

.fb-correct-answer {
  font-size: 0.82rem;
  color: var(--text-muted);
  padding-left: 44px;
}

.fb-correct-answer strong {
  color: var(--text-primary);
}

.fb-actions {
  display: flex;
  gap: 10px;
  justify-content: flex-end;
  margin-top: 4px;
}

/* ============================================================
   ACHIEVEMENT BADGES — Redesigned Duolingo-style
   ============================================================ */
.badges-grid-redesign {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.badge-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background: var(--bg-card);
  border: 1.5px solid var(--border);
  border-radius: 16px;
  padding: 16px 10px 12px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s;
  position: relative;
  box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}

.badge-item.unlocked {
  border-color: rgba(255,219,0,0.4);
  background: linear-gradient(160deg, var(--bg-card) 0%, rgba(255,219,0,0.04) 100%);
}

.badge-item.unlocked:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(255,219,0,0.18);
  border-color: #ffdb00;
}

.badge-item.locked {
  filter: grayscale(1);
  opacity: 0.5;
}

.badge-emoji {
  font-size: 2rem;
  margin-bottom: 8px;
  line-height: 1;
  filter: drop-shadow(0 3px 6px rgba(0,0,0,0.12));
}

.badge-item.unlocked .badge-emoji {
  animation: floatBadge 3s ease-in-out infinite;
}

.badge-name {
  font-family: 'Outfit', sans-serif;
  font-weight: 700;
  font-size: 0.75rem;
  color: var(--text-primary);
  margin-bottom: 3px;
  line-height: 1.2;
}

.badge-desc {
  font-size: 0.65rem;
  color: var(--text-muted);
  line-height: 1.3;
  margin-bottom: 6px;
  flex: 1;
}

.badge-date {
  font-size: 0.6rem;
  font-weight: 700;
  color: #cda200;
  background: rgba(255,219,0,0.12);
  padding: 2px 7px;
  border-radius: 99px;
}

.badge-date.locked-label {
  background: rgba(0,0,0,0.06);
  color: var(--text-muted);
}

/* Unlocked badge sparkle ring */
.badge-item.unlocked::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: 17px;
  border: 2px solid transparent;
  background: linear-gradient(135deg, rgba(255,219,0,0.5), transparent 60%) border-box;
  -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: destination-out;
  mask-composite: exclude;
  pointer-events: none;
}

/* Mobile tweaks */
@media (max-width: 480px) {
  .exercise-mode-picker {
    grid-template-columns: 1fr;
    gap: 10px;
  }
  .exercise-mode-card {
    display: grid;
    grid-template-columns: 42px 1fr 24px;
    grid-template-areas: 
      "icon title arrow"
      "icon desc arrow"
      "icon count arrow";
    align-items: center;
    text-align: left;
    padding: 14px 16px;
    border-radius: 16px;
    gap: 0 12px;
    box-shadow: 0 1px 6px rgba(0,0,0,0.03);
  }
  .exercise-mode-card:hover {
    transform: none;
    box-shadow: 0 1px 6px rgba(0,0,0,0.03);
  }
  .exercise-mode-card:active {
    transform: scale(0.98);
  }
  .exercise-mode-icon {
    grid-area: icon;
    font-size: 1.8rem;
    margin-bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
  }
  .exercise-mode-icon svg {
    width: 28px;
    height: 28px;
  }
  .exercise-mode-title {
    grid-area: title;
    font-size: 0.95rem;
    margin-bottom: 2px;
  }
  .exercise-mode-desc {
    grid-area: desc;
    font-size: 0.76rem;
    margin-bottom: 0;
    line-height: 1.3;
  }
  .exercise-card-count {
    grid-area: count;
    margin: 2px 0 0;
    font-size: 0.68rem;
  }
  .exercise-mode-card .btn {
    display: none;
  }
  .exercise-mode-card::after {
    grid-area: arrow;
    content: '→';
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--card-accent, var(--primary));
    justify-self: end;
    display: flex;
    align-items: center;
    transition: transform 0.2s;
  }
  .exercise-mode-card:active::after {
    transform: translateX(4px);
  }
  .match-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
  }
  .match-tile {
    font-size: 0.75rem;
    padding: 6px;
  }
  .wa-phrase-text { font-size: 1.2rem; }
  .exercise-feedback-bar { padding: 14px 16px 20px; }
  .badges-grid-redesign {
    grid-template-columns: repeat(auto-fill, minmax(85px, 1fr));
    gap: 10px;
  }
}

/* ============================================================
   PM Audit v1.2.12 — New Components
   ============================================================ */

/* ── Exercises Empty State ── */
.exercises-empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  background: var(--bg-card);
  border: 2px dashed rgba(92,195,232,0.35);
  border-radius: var(--radius-xl);
  margin-bottom: var(--space-lg);
  animation: fadeInUp 0.4s ease both;
}
.exercises-empty-state-icon {
  font-size: 3.5rem;
  margin-bottom: var(--space-md);
  animation: bounceIn 0.6s cubic-bezier(.16,1,.3,1) both;
}
.exercises-empty-state h3 {
  font-family: 'Outfit', sans-serif;
  font-weight: 800;
  font-size: 1.35rem;
  margin-bottom: var(--space-sm);
  background: linear-gradient(135deg, var(--sky-blue), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.exercises-empty-state p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.5;
  max-width: 320px;
  margin-bottom: var(--space-lg);
}
@keyframes bounceIn {
  0%   { transform: scale(0.5); opacity: 0; }
  60%  { transform: scale(1.1); opacity: 1; }
  80%  { transform: scale(0.95); }
  100% { transform: scale(1); }
}

/* ── Streak Celebration Modal ── */
.streak-modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 9000;
  background: rgba(0,0,0,0.65);
  backdrop-filter: blur(6px);
  display: flex;
  align-items: center;
  justify-content: center;
  animation: fadeIn 0.2s ease both;
  padding: var(--space-lg);
}
.streak-modal-overlay.hidden { display: none; }
.streak-modal-card {
  background: var(--bg-card);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl) var(--space-xl);
  text-align: center;
  max-width: 340px;
  width: 100%;
  position: relative;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0,0,0,0.4);
  animation: popIn 0.5s cubic-bezier(.16,1,.3,1) both;
}
@keyframes popIn {
  0%   { transform: scale(0.7) translateY(30px); opacity: 0; }
  100% { transform: scale(1) translateY(0); opacity: 1; }
}
.streak-modal-fire {
  font-size: 4rem;
  margin-bottom: var(--space-sm);
  display: block;
  animation: firePulse 0.8s ease-in-out infinite alternate;
}
@keyframes firePulse {
  0%   { transform: scale(1) rotate(-3deg); }
  100% { transform: scale(1.15) rotate(3deg); }
}
.streak-modal-number {
  font-family: 'Outfit', sans-serif;
  font-size: 5rem;
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(135deg, var(--sunshine), var(--coral));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}
.streak-modal-label {
  font-family: 'Outfit', sans-serif;
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: var(--space-sm);
}
.streak-modal-sub {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: var(--space-lg);
}
.streak-confetti-dot {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  animation: confettiFly 1.2s ease-out both;
}
@keyframes confettiFly {
  0%   { transform: translate(0,0) scale(0); opacity: 1; }
  100% { transform: translate(var(--cx), var(--cy)) scale(1); opacity: 0; }
}

/* ── Badge Share Button ── */
.badge-share-btn {
  margin-top: var(--space-sm);
  font-size: 0.75rem;
  padding: 4px 10px;
  border: 1px solid rgba(92,195,232,0.4);
  border-radius: 20px;
  color: var(--sky-blue);
  background: rgba(92,195,232,0.08);
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.badge-share-btn:hover {
  background: rgba(92,195,232,0.2);
  transform: translateY(-1px);
}

/* ── German-Only Brand Badge ── */
.german-only-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, rgba(0,0,0,0.04), rgba(255,219,0,0.1));
  border: 1.5px solid rgba(255,219,0,0.5);
  border-radius: 30px;
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 8px;
}
.german-only-note {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 8px;
  line-height: 1.4;
}

/* ── Collab Invite Active Card ── */
.exercise-mode-card.collab-active {
  border: 2px solid rgba(92,195,232,0.3);
  background: linear-gradient(135deg, rgba(92,195,232,0.05), rgba(92,195,232,0.02));
}
.exercise-mode-card.collab-active:hover {
  border-color: rgba(92,195,232,0.5);
  box-shadow: 0 8px 30px rgba(92,195,232,0.15);
}

/* Mobile additions */
@media (max-width: 480px) {
  .streak-modal-number { font-size: 4rem; }
  .exercises-empty-state { padding: var(--space-xl) var(--space-md); }
}

/* ── AI Trial Badges ── */
.trial-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(92,195,232, 0.12);
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 20px;
  margin-left: 6px;
  text-transform: none;
  letter-spacing: 0;
  vertical-align: middle;
}

/* ── Pro Waitlist Form & Modal Adjustments ── */
.pro-modal-content label {
  color: var(--text-primary);
}
.pro-modal-content .input {
  background: var(--bg-card);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  padding: var(--space-sm) var(--space-md);
  font-size: 0.95rem;
  transition: border-color 0.2s;
}
.pro-modal-content .input:focus {
  border-color: var(--primary);
  outline: none;
}