/* ============================================================
   Algo Infinity Verse — Homepage Redesign
   Color palette: soft pastels only (no cyan, lime, neon, etc.)
   Style: minimalist bento-grid with deliberate asymmetry
   ============================================================ */

/* ── 1. DESIGN TOKENS ── */
:root {
  /* Background — deep neutral dark (no purple tint) */
  --hp-bg: #0E0E14;
  --hp-surface: #16161E;
  --hp-card: #1C1C26;
  --hp-card-hover: #262632;
  --hp-card-border: rgba(212, 196, 240, 0.08);
  --hp-card-border-hover: rgba(212, 196, 240, 0.18);

  /* Text */
  --hp-text: #E8E4F2;
  --hp-text-secondary: #A398C0;
  --hp-text-tertiary: #7A7298;

  /* Soft pastel accents — NO harsh/vivid colors */
  --hp-lavender: #D4C4F0;
  --hp-lavender-rgb: 212, 196, 240;
  --hp-periwinkle: #BCC8F0;
  --hp-peach: #F2D5C4;
  --hp-rose: #EDC8D2;
  --hp-mint: #C4E2D0;
  --hp-sky: #C0D4EA;

  /* Semantic accents */
  --hp-accent: var(--hp-lavender);
  --hp-accent-secondary: var(--hp-periwinkle);

  /* Layout */
  --hp-max-width: 1400px;
  --hp-gap: 24px;
  --hp-radius: 20px;
  --hp-radius-sm: 12px;

  /* Transitions */
  --hp-transition: 0.35s cubic-bezier(0.22, 1, 0.36, 1);
  --hp-transition-fast: 0.2s ease;

  /* Z-index layers */
  --z-base: 1;
  --z-sticky: 100;
  --z-overlay: 1000;
}

/* Override body background to match new palette (homepage only) */
body[data-page="index"] {
  background: var(--hp-bg);
}

/* ── 2. TYPOGRAPHY ── */
.hp-display {
  font-family: 'DM Serif Display', Georgia, serif;
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.hp-heading {
  font-family: 'DM Serif Display', Georgia, serif;
  font-weight: 400;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.hp-body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 400;
  line-height: 1.6;
}

.hp-mono {
  font-family: 'JetBrains Mono', 'Fira Code', monospace;
  font-weight: 400;
  letter-spacing: -0.01em;
}

/* ── 3. SECTION BASE ── */
.hp-section {
  width: 100%;
  max-width: var(--hp-max-width);
  margin: 0 auto;
  padding: 80px 32px;
  position: relative;
}

.hp-section-header {
  margin-bottom: 48px;
  max-width: 560px;
}

.hp-section-eyebrow {
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--hp-lavender);
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.hp-section-eyebrow::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--hp-lavender);
  border-radius: 2px;
}

.hp-section-title {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 400;
  color: var(--hp-text);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0;
}

.hp-section-subtitle {
  font-family: 'Inter', sans-serif;
  font-size: 1.05rem;
  color: var(--hp-text-secondary);
  margin-top: 16px;
  line-height: 1.6;
  max-width: 480px;
}

/* ── 4. HERO SECTION ── */
.hp-hero {
  position: relative;
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 120px 32px 80px;
  background:
    linear-gradient(to bottom, transparent 60%, var(--hp-bg) 100%),
    radial-gradient(ellipse 80% 60% at 30% 20%, rgba(212, 196, 240, 0.07) 0%, transparent 70%),
    radial-gradient(ellipse 60% 50% at 80% 50%, rgba(188, 200, 240, 0.05) 0%, transparent 60%),
    radial-gradient(ellipse 50% 40% at 50% 50%, rgba(242, 213, 196, 0.03) 0%, transparent 50%),
    var(--hp-bg);
}
/* Light mode CSS variables override */
html.light-mode {
  --hp-bg: #FAFAF9;              /* Light background */
  --hp-text: #2C1E4A;            /* Dark text for light mode */
  --hp-text-secondary: #6B5B7F;  /* Secondary text */
  --hp-card: #F0EEE8;            /* Light cards */
  --hp-lavender: #8B5CF6;        /* Adjusted accent colors */
  /* ... etc */
}
.hp-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 160px;
  background: linear-gradient(to bottom, transparent, var(--hp-bg));
  pointer-events: none;
  z-index: 1;
}

/* Floating pastel geometric shapes — signature element */
.hp-hero-shapes {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 1) 60%, rgba(0, 0, 0, 0) 100%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 1) 60%, rgba(0, 0, 0, 0) 100%);
}

.hp-shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.15;
  filter: blur(40px);
  animation: hpShapeFloat 20s ease-in-out infinite;
}

.hp-shape:nth-child(1) {
  width: 500px;
  height: 500px;
  background: var(--hp-lavender);
  top: -10%;
  left: -8%;
  animation-delay: 0s;
  animation-duration: 25s;
}

.hp-shape:nth-child(2) {
  width: 400px;
  height: 400px;
  background: var(--hp-periwinkle);
  bottom: 5%;
  right: -5%;
  animation-delay: -5s;
  animation-duration: 22s;
}

.hp-shape:nth-child(3) {
  width: 300px;
  height: 300px;
  background: var(--hp-peach);
  top: 40%;
  right: 15%;
  animation-delay: -10s;
  animation-duration: 28s;
}

.hp-shape:nth-child(4) {
  width: 200px;
  height: 200px;
  background: var(--hp-rose);
  top: 15%;
  right: 35%;
  animation-delay: -3s;
  animation-duration: 18s;
}

.hp-shape:nth-child(5) {
  width: 350px;
  height: 350px;
  background: var(--hp-mint);
  bottom: 15%;
  left: 12%;
  animation-delay: -8s;
  animation-duration: 24s;
}

@keyframes hpShapeFloat {
  0%, 100% { transform: translate(0, 0) scale(1) rotate(0deg); }
  25% { transform: translate(30px, -40px) scale(1.05) rotate(5deg); }
  50% { transform: translate(-20px, 20px) scale(0.95) rotate(-3deg); }
  75% { transform: translate(40px, 30px) scale(1.02) rotate(4deg); }
}

/* Hero content */
.hp-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
}

.hp-hero-title {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 400;
  color: var(--hp-text);
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin: 0 0 24px;
  animation: hpFadeSlideUp 0.8s ease both 0.4s;
}

.hp-hero-title .hp-gradient-text {
  background: linear-gradient(135deg, var(--hp-lavender), var(--hp-periwinkle), var(--hp-peach));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hp-hero-subtitle {
  font-family: 'Inter', sans-serif;
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--hp-text-secondary);
  line-height: 1.7;
  max-width: 600px;
  margin: 0 auto 40px;
  animation: hpFadeSlideUp 0.8s ease both 0.6s;
}

.hp-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-bottom: 60px;
  animation: hpFadeSlideUp 0.8s ease both 0.8s;
}

.hp-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 100px;
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--hp-transition);
  border: none;
}

.hp-btn-primary {
  background: linear-gradient(135deg, var(--hp-lavender), var(--hp-periwinkle));
  color: #0E0E14;
  box-shadow: 0 4px 24px rgba(var(--hp-lavender-rgb), 0.25);
}

.hp-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(var(--hp-lavender-rgb), 0.35);
}

.hp-btn-primary:active {
  transform: translateY(0);
}

.hp-btn-secondary {
  background: transparent;
  color: var(--hp-text);
  border: 1.5px solid rgba(var(--hp-lavender-rgb), 0.25);
}

.hp-btn-secondary:hover {
  background: rgba(var(--hp-lavender-rgb), 0.08);
  border-color: rgba(var(--hp-lavender-rgb), 0.4);
}

.hp-hero-stats {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  animation: hpFadeSlideUp 0.8s ease both 1s;
}

.hp-stat-item {
  text-align: center;
}

.hp-stat-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2rem;
  font-weight: 500;
  color: var(--hp-text);
  display: block;
  line-height: 1.2;
}

.hp-stat-label {
  font-family: 'Inter', sans-serif;
  font-size: 0.82rem;
  color: var(--hp-text-tertiary);
  margin-top: 4px;
  display: block;
}

@keyframes hpFadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── 5. PROGRESS STRIP ── */
.hp-progress {
  background: transparent;
  padding: 16px 32px 32px;
  max-width: var(--hp-max-width);
  margin: 0 auto;
}

.hp-progress-inner {
  max-width: var(--hp-max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.hp-progress-left {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.hp-level-badge {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  background: rgba(var(--hp-lavender-rgb), 0.08);
  border: 1px solid rgba(var(--hp-lavender-rgb), 0.15);
  border-radius: 100px;
}

.hp-level-number {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 1.4rem;
  color: var(--hp-lavender);
}

.hp-level-label {
  font-family: 'Inter', sans-serif;
  font-size: 0.8rem;
  color: var(--hp-text-secondary);
}

.hp-xp-bar-wrap {
  min-width: 180px;
}

.hp-xp-bar {
  height: 6px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 100px;
  overflow: hidden;
  position: relative;
}

.hp-xp-fill {
  height: 100%;
  border-radius: 100px;
  background: linear-gradient(90deg, var(--hp-lavender), var(--hp-periwinkle));
  transition: width 0.8s ease;
  width: 0%;
}

.hp-xp-text {
  font-family: 'Inter', sans-serif;
  font-size: 0.75rem;
  color: var(--hp-text-tertiary);
  margin-top: 4px;
  display: block;
}

.hp-streak {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(237, 200, 210, 0.08);
  border: 1px solid rgba(237, 200, 210, 0.15);
  border-radius: 100px;
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  color: var(--hp-rose);
}

.hp-streak i {
  color: inherit;
}

.hp-streak-number {
  font-weight: 600;
  font-size: 1.1rem;
}

.hp-progress-cta {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--hp-text-secondary);
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  text-decoration: none;
  padding: 8px 16px;
  border-radius: 100px;
  transition: all var(--hp-transition-fast);
}

.hp-progress-cta:hover {
  background: rgba(var(--hp-lavender-rgb), 0.08);
  color: var(--hp-lavender);
}

/* ── 6. BENTO GRID (shared) ── */
.hp-bento-grid {
  display: grid;
  gap: var(--hp-gap);
}

/* ── 7. QUICK ACTIONS ── */
.hp-quick-actions {
  /* Inherits default hp-section padding */
}

.hp-quick-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 0.8fr 1.2fr;
  grid-template-rows: auto auto;
  gap: var(--hp-gap);
}

.hp-quick-card {
  position: relative;
  padding: 32px;
  background: var(--hp-card);
  border: 1px solid var(--hp-card-border);
  border-radius: var(--hp-radius);
  transition: all var(--hp-transition);
  cursor: pointer;
  text-decoration: none;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.hp-quick-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--hp-transition);
  pointer-events: none;
}

.hp-quick-card:hover {
  background: var(--hp-card-hover);
  border-color: var(--hp-card-border-hover);
  transform: translateY(-4px);
}

.hp-quick-card:active {
  transform: translateY(-2px);
}

/* Asymmetry */
.hp-quick-card--daily {
  grid-row: 1 / 3;
  grid-column: 1 / 2;
}

.hp-quick-card--flashcards {
  grid-row: 1 / 2;
  grid-column: 2 / 3;
}

.hp-quick-card--quiz {
  grid-row: 2 / 3;
  grid-column: 2 / 3;
}

.hp-quick-card--tutor {
  grid-row: 1 / 3;
  grid-column: 3 / 5;
}

.hp-quick-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
  flex-shrink: 0;
}

.hp-quick-icon--daily { background: rgba(212, 196, 240, 0.12); color: var(--hp-lavender); }
.hp-quick-icon--flashcards { background: rgba(188, 200, 240, 0.12); color: var(--hp-periwinkle); }
.hp-quick-icon--quiz { background: rgba(242, 213, 196, 0.12); color: var(--hp-peach); }
.hp-quick-icon--tutor { background: rgba(196, 226, 208, 0.12); color: var(--hp-mint); }

.hp-quick-card-title {
  font-family: 'Inter', sans-serif;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--hp-text);
  margin: 0 0 8px;
}

.hp-quick-card-desc {
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  color: var(--hp-text-secondary);
  line-height: 1.5;
  margin: 0;
  flex: 1;
}

.hp-quick-card-meta {
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  color: var(--hp-text-tertiary);
  margin-top: 16px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.hp-quick-card-meta .hp-due-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--hp-rose);
  display: inline-block;
}

/* Tutor card special treatment - larger */
.hp-quick-card--tutor .hp-quick-card-title {
  font-size: 1.3rem;
}

.hp-quick-card--tutor .hp-quick-demo-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: rgba(var(--hp-lavender-rgb), 0.12);
  border-radius: 100px;
  font-size: 0.75rem;
  color: var(--hp-lavender);
  margin-top: auto;
  align-self: flex-start;
}

/* ── 8. PATHWAYS ── */
.hp-pathways-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--hp-gap);
}

.hp-pathway-card {
  padding: 36px;
  background: var(--hp-card);
  border: 1px solid var(--hp-card-border);
  border-radius: var(--hp-radius);
  transition: all var(--hp-transition);
  text-decoration: none;
  display: flex;
  flex-direction: column;
}

.hp-pathway-card:hover {
  background: var(--hp-card-hover);
  border-color: var(--hp-card-border-hover);
  transform: translateY(-4px);
}

.hp-pathway-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
}

.hp-pathway-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
}

.hp-pathway-icon--goal { background: rgba(212, 196, 240, 0.12); color: var(--hp-lavender); }
.hp-pathway-icon--topic { background: rgba(188, 200, 240, 0.12); color: var(--hp-periwinkle); }

.hp-pathway-arrow {
  color: var(--hp-text-tertiary);
  font-size: 1rem;
  transition: transform var(--hp-transition-fast);
}

.hp-pathway-card:hover .hp-pathway-arrow {
  transform: translateX(4px);
  color: var(--hp-lavender);
}

.hp-pathway-title {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 1.3rem;
  color: var(--hp-text);
  margin: 0 0 8px;
}

.hp-pathway-desc {
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  color: var(--hp-text-secondary);
  line-height: 1.5;
  margin: 0 0 20px;
}

.hp-pathway-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: auto;
}

.hp-pathway-tag {
  padding: 6px 14px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 100px;
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  color: var(--hp-text-secondary);
}

/* ── 9. FEATURED VISUALIZER ── */
.hp-visualizer-section {
  /* Inherits default hp-section padding */
}

.hp-visualizer-card {
  position: relative;
  padding: 48px;
  background:
    linear-gradient(135deg, rgba(212, 196, 240, 0.06), rgba(188, 200, 240, 0.04)),
    var(--hp-card);
  border: 1px solid rgba(var(--hp-lavender-rgb), 0.12);
  border-radius: var(--hp-radius);
  overflow: hidden;
  transition: all var(--hp-transition);
}

.hp-visualizer-card:hover {
  border-color: rgba(var(--hp-lavender-rgb), 0.25);
  transform: translateY(-2px);
}

.hp-visualizer-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: rgba(var(--hp-lavender-rgb), 0.12);
  border: 1px solid rgba(var(--hp-lavender-rgb), 0.18);
  border-radius: 100px;
  font-family: 'Inter', sans-serif;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--hp-lavender);
  margin-bottom: 20px;
}

.hp-visualizer-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  align-items: center;
}

.hp-visualizer-info-title {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 1.8rem;
  color: var(--hp-text);
  margin: 0 0 12px;
}

.hp-visualizer-info-desc {
  font-family: 'Inter', sans-serif;
  font-size: 0.92rem;
  color: var(--hp-text-secondary);
  line-height: 1.6;
  margin: 0 0 28px;
}

.hp-visualizer-preview {
  position: relative;
  height: 300px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--hp-radius-sm);
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hp-visualizer-preview-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  color: var(--hp-text-tertiary);
  font-size: 0.85rem;
  text-align: center;
}

.hp-visualizer-preview-placeholder i {
  font-size: 3rem;
  color: var(--hp-lavender);
  opacity: 0.6;
}

/* ── 10. TOPICS GRID ── */
.hp-topics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--hp-gap);
}

.hp-topic-card {
  padding: 28px;
  background: var(--hp-card);
  border: 1px solid var(--hp-card-border);
  border-radius: var(--hp-radius);
  transition: all var(--hp-transition);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.hp-topic-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1.5px;
  background: linear-gradient(135deg, transparent, transparent);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
  transition: all var(--hp-transition);
}

.hp-topic-card:nth-child(1)::after { background: linear-gradient(135deg, var(--hp-lavender), transparent); }
.hp-topic-card:nth-child(2)::after { background: linear-gradient(135deg, var(--hp-periwinkle), transparent); }
.hp-topic-card:nth-child(3)::after { background: linear-gradient(135deg, var(--hp-peach), transparent); }
.hp-topic-card:nth-child(4)::after { background: linear-gradient(135deg, var(--hp-rose), transparent); }
.hp-topic-card:nth-child(5)::after { background: linear-gradient(135deg, var(--hp-mint), transparent); }
.hp-topic-card:nth-child(6)::after { background: linear-gradient(135deg, var(--hp-sky), transparent); }
.hp-topic-card:nth-child(7)::after { background: linear-gradient(135deg, var(--hp-lavender), transparent); }
.hp-topic-card:nth-child(8)::after { background: linear-gradient(135deg, var(--hp-periwinkle), transparent); }

/* Fallback for browsers that don't support -webkit-mask-composite */
@supports not (-webkit-mask-composite: xor) {
  .hp-topic-card::after {
    display: none;
  }
  .hp-topic-card {
    border-image: none;
    position: relative;
  }
  .hp-topic-card:hover {
    border-color: rgba(var(--hp-lavender-rgb), 0.25);
  }
}

.hp-topic-card:hover {
  background: var(--hp-card-hover);
  border-color: var(--hp-card-border-hover);
  transform: translateY(-4px);
}

.hp-topic-card:hover::after {
  opacity: 0.6;
}

.hp-topic-icon {
  font-size: 2rem;
  margin-bottom: 16px;
  display: block;
  color: var(--hp-lavender);
}

.hp-topic-card:nth-child(1) .hp-topic-icon { color: var(--hp-lavender); }
.hp-topic-card:nth-child(2) .hp-topic-icon { color: var(--hp-periwinkle); }
.hp-topic-card:nth-child(3) .hp-topic-icon { color: var(--hp-peach); }
.hp-topic-card:nth-child(4) .hp-topic-icon { color: var(--hp-rose); }
.hp-topic-card:nth-child(5) .hp-topic-icon { color: var(--hp-mint); }
.hp-topic-card:nth-child(6) .hp-topic-icon { color: var(--hp-sky); }
.hp-topic-card:nth-child(7) .hp-topic-icon { color: var(--hp-lavender); }
.hp-topic-card:nth-child(8) .hp-topic-icon { color: var(--hp-periwinkle); }

.hp-topic-name {
  font-family: 'Inter', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--hp-text);
  margin: 0 0 8px;
}

.hp-topic-meta {
  font-family: 'Inter', sans-serif;
  font-size: 0.8rem;
  color: var(--hp-text-tertiary);
  display: flex;
  align-items: center;
  gap: 12px;
}

.hp-topic-difficulty {
  display: flex;
  gap: 3px;
  align-items: center;
}

.hp-topic-difficulty-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
}

.hp-topic-difficulty-dot.filled {
  background: var(--hp-mint);
}

.hp-topic-difficulty-dot.filled.medium {
  background: var(--hp-peach);
}

.hp-topic-difficulty-dot.filled.hard {
  background: var(--hp-rose);
}

/* ── 11. DID YOU KNOW? ── */
.hp-facts-card {
  padding: 36px 40px;
  background: linear-gradient(135deg, rgba(212, 196, 240, 0.04), rgba(188, 200, 240, 0.02));
  border: 1px solid rgba(var(--hp-lavender-rgb), 0.10);
  border-radius: var(--hp-radius);
  transition: all var(--hp-transition);
}

.hp-facts-card:hover {
  border-color: rgba(var(--hp-lavender-rgb), 0.18);
}

.hp-facts-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}

.hp-facts-title {
  display: flex;
  align-items: center;
  gap: 12px;
}

.hp-facts-icon {
  font-size: 1.5rem;
  color: var(--hp-lavender);
}

.hp-facts-title h3 {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--hp-text);
  margin: 0;
}

.hp-facts-btn {
  padding: 8px 20px;
  background: rgba(var(--hp-lavender-rgb), 0.10);
  border: 1px solid rgba(var(--hp-lavender-rgb), 0.15);
  border-radius: 100px;
  color: var(--hp-lavender);
  font-family: 'Inter', sans-serif;
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--hp-transition-fast);
}

.hp-facts-btn:hover {
  background: rgba(var(--hp-lavender-rgb), 0.18);
  border-color: rgba(var(--hp-lavender-rgb), 0.3);
  transform: translateY(-1px);
}

.hp-fact-text {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: 1.25rem;
  line-height: 1.6;
  color: var(--hp-text);
  margin: 0 0 20px;
  min-height: 2rem;
  transition: opacity 0.3s ease;
}

.hp-facts-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: 'Inter', sans-serif;
  font-size: 0.8rem;
  color: var(--hp-text-tertiary);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding-top: 16px;
}

.hp-facts-counter {
  padding: 3px 12px;
  background: rgba(var(--hp-lavender-rgb), 0.08);
  border-radius: 100px;
  font-size: 0.72rem;
}

/* ── 12. PLATFORM FEATURES ── */
.hp-features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--hp-gap);
}

.hp-feature-card {
  padding: 36px;
  background: var(--hp-card);
  border: 1px solid var(--hp-card-border);
  border-radius: var(--hp-radius);
  transition: all var(--hp-transition);
}

.hp-feature-card:hover {
  background: var(--hp-card-hover);
  border-color: var(--hp-card-border-hover);
  transform: translateY(-4px);
}

.hp-feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 20px;
}

.hp-feature-icon:nth-child(1) { background: rgba(212, 196, 240, 0.12); color: var(--hp-lavender); }
.hp-feature-icon:nth-child(2) { background: rgba(188, 200, 240, 0.12); color: var(--hp-periwinkle); }
.hp-feature-icon:nth-child(3) { background: rgba(242, 213, 196, 0.12); color: var(--hp-peach); }
.hp-feature-icon:nth-child(4) { background: rgba(196, 226, 208, 0.12); color: var(--hp-mint); }

.hp-feature-title {
  font-family: 'Inter', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--hp-text);
  margin: 0 0 8px;
}

.hp-feature-desc {
  font-family: 'Inter', sans-serif;
  font-size: 0.88rem;
  color: var(--hp-text-secondary);
  line-height: 1.6;
  margin: 0;
}

.hp-feature-stat {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2.2rem;
  font-weight: 500;
  color: var(--hp-lavender);
  display: block;
  margin-bottom: 4px;
}

/* ── 13. LEADERBOARD PREVIEW ── */
.hp-leaderboard-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: var(--hp-gap);
}

.hp-leaderboard-card {
  padding: 36px;
  background: var(--hp-card);
  border: 1px solid var(--hp-card-border);
  border-radius: var(--hp-radius);
}

.hp-leaderboard-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.hp-leaderboard-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 16px;
  border-radius: var(--hp-radius-sm);
  transition: background var(--hp-transition-fast);
}

.hp-leaderboard-row:hover {
  background: rgba(255, 255, 255, 0.03);
}

.hp-leaderboard-rank {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--hp-text-tertiary);
  width: 24px;
  text-align: center;
}

.hp-leaderboard-rank.top-1 { color: var(--hp-peach); }
.hp-leaderboard-rank.top-2 { color: var(--hp-sky); }
.hp-leaderboard-rank.top-3 { color: var(--hp-lavender); }

.hp-leaderboard-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  color: var(--hp-lavender);
  overflow: hidden;
  flex-shrink: 0;
}

.hp-leaderboard-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hp-leaderboard-name {
  flex: 1;
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--hp-text);
}

.hp-leaderboard-xp {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.82rem;
  color: var(--hp-lavender);
}

.hp-leaderboard-link {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 36px;
  background: var(--hp-card);
  border: 1px solid var(--hp-card-border);
  border-radius: var(--hp-radius);
  text-decoration: none;
  color: var(--hp-text-secondary);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  transition: all var(--hp-transition);
}

.hp-leaderboard-link:hover {
  background: var(--hp-card-hover);
  border-color: var(--hp-card-border-hover);
  color: var(--hp-lavender);
}

.hp-leaderboard-link i {
  transition: transform var(--hp-transition-fast);
  color: inherit;
}

.hp-leaderboard-link:hover i {
  transform: translateX(4px);
}

/* ── 14. CTA BAND ── */
.hp-cta-band {
  position: relative;
  padding: 100px 32px;
  text-align: center;
  overflow: hidden;
  background:
    radial-gradient(ellipse 60% 50% at 50% 50%, rgba(212, 196, 240, 0.06) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 30% 80%, rgba(188, 200, 240, 0.04) 0%, transparent 60%),
    var(--hp-bg);
}

.hp-cta-band::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(var(--hp-lavender-rgb), 0.15), transparent);
}

.hp-cta-title {
  font-family: 'DM Serif Display', Georgia, serif;
  font-size: clamp(2rem, 5vw, 3.5rem);
  color: var(--hp-text);
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}

.hp-cta-subtitle {
  font-family: 'Inter', sans-serif;
  font-size: 1.1rem;
  color: var(--hp-text-secondary);
  margin: 0 0 36px;
}

.hp-cta-number {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 500;
  color: var(--hp-lavender);
}

/* ── 14.5. KEYBOARD SHORTCUTS ── */

.shortcuts-toggle-btn {
  position: fixed;
  bottom: 55px;
  left: 30px;
  z-index: 998;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  background: rgba(28, 28, 38, 0.85);
  border: 1px solid rgba(212, 196, 240, 0.12);
  border-radius: 8px;
  color: #A398C0;
  font-size: 0.72rem;
  font-weight: 400;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: 'JetBrains Mono', monospace;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  line-height: 1;
  box-shadow: none;
}

.shortcuts-toggle-btn:hover {
  background: rgba(28, 28, 38, 0.92);
  color: #C8C0D8;
  border-color: rgba(212, 196, 240, 0.20);
}

.shortcuts-toggle-btn i {
  font-size: 0.72rem;
  color: #A398C0;
  transition: color 0.2s ease;
}

.shortcuts-toggle-btn:hover i {
  color: #C8C0D8;
}

.shortcuts-toggle-btn .shortcut-hint {
  font-size: 0.68rem;
  opacity: 0.5;
}

.shortcuts-toggle-btn:focus-visible {
  outline: 2px solid rgba(212, 196, 240, 0.3) !important;
  outline-offset: 2px !important;
}

/* Shortcuts modal */
.shortcuts-modal {
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.shortcuts-modal.shortcuts-modal--visible {
  opacity: 1;
  visibility: visible;
}

.shortcuts-modal .modal-content {
  max-width: 960px;
  max-height: 85vh;
  overflow-y: auto;
  margin-top: 20px;
  padding: 22px 28px 22px;
  transform: translateY(12px) scale(0.97);
  opacity: 0;
  transition: transform 0.25s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.2s ease;
  background: var(--hp-card);
  border: 1px solid rgba(212, 196, 240, 0.12);
  box-shadow:
    0 25px 60px rgba(0, 0, 0, 0.6),
    0 0 0 1px rgba(212, 196, 240, 0.04);
}

.shortcuts-modal.shortcuts-modal--visible .modal-content {
  transform: translateY(0) scale(1);
  opacity: 1;
}

.shortcuts-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.shortcuts-card-header h3 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--hp-lavender);
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0;
}

.shortcuts-card-header h3 i {
  color: var(--hp-lavender);
  font-size: 1.2rem;
}

.shortcuts-card-header .modal-close {
  background: none;
  border: none;
  color: var(--hp-text-tertiary);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 6px;
  border-radius: 8px;
  transition: all 0.2s ease;
}

.shortcuts-card-header .modal-close:hover {
  background: rgba(255, 255, 255, 0.06);
  color: var(--hp-text);
}

.shortcuts-card-header .modal-close:focus-visible {
  outline: 2px solid var(--hp-lavender) !important;
  outline-offset: 2px !important;
}

.shortcuts-intro {
  color: var(--hp-text-secondary);
  font-size: 0.9rem;
  margin-bottom: 20px;
  letter-spacing: 0.01em;
}

.shortcuts-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.shortcuts-section {
  border-radius: 14px;
  padding: 16px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.06);
}

.shortcuts-section:hover {
  transform: translateY(-1px);
}

.shortcuts-section:has(h4 i.fa-compass) {
  background: rgba(212, 196, 240, 0.05);
  border: 1px solid rgba(212, 196, 240, 0.10);
}

.shortcuts-section:has(h4 i.fa-compass):hover {
  box-shadow: 0 4px 20px rgba(212, 196, 240, 0.06);
  border-color: rgba(212, 196, 240, 0.18);
}

.shortcuts-section:has(h4 i.fa-search) {
  background: rgba(192, 212, 234, 0.05);
  border: 1px solid rgba(192, 212, 234, 0.10);
}

.shortcuts-section:has(h4 i.fa-search):hover {
  box-shadow: 0 4px 20px rgba(192, 212, 234, 0.06);
  border-color: rgba(192, 212, 234, 0.18);
}

.shortcuts-section:has(h4 i.fa-code) {
  background: rgba(188, 200, 240, 0.05);
  border: 1px solid rgba(188, 200, 240, 0.10);
}

.shortcuts-section:has(h4 i.fa-code):hover {
  box-shadow: 0 4px 20px rgba(188, 200, 240, 0.06);
  border-color: rgba(188, 200, 240, 0.18);
}

.shortcuts-section:has(h4 i.fa-globe) {
  background: rgba(242, 213, 196, 0.04);
  border: 1px solid rgba(242, 213, 196, 0.10);
}

.shortcuts-section:has(h4 i.fa-globe):hover {
  box-shadow: 0 4px 20px rgba(242, 213, 196, 0.06);
  border-color: rgba(242, 213, 196, 0.18);
}

.shortcuts-section h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--hp-text);
  margin: 0 0 12px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.02em;
}

.shortcuts-section h4 i {
  font-size: 0.9rem;
}

.shortcuts-section:has(h4 i.fa-compass) h4 i { color: var(--hp-lavender); }
.shortcuts-section:has(h4 i.fa-search) h4 i { color: var(--hp-sky); }
.shortcuts-section:has(h4 i.fa-code) h4 i { color: var(--hp-periwinkle); }
.shortcuts-section:has(h4 i.fa-globe) h4 i { color: var(--hp-peach); }

.shortcuts-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

.shortcuts-table tr {
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: background 0.15s ease;
}

.shortcuts-table tr:last-child {
  border-bottom: none;
}

.shortcuts-table tr:hover {
  background: rgba(255, 255, 255, 0.03);
}

.shortcuts-table td {
  padding: 6px 4px;
  color: var(--hp-text-secondary);
  vertical-align: middle;
}

.shortcuts-table td:first-child {
  color: var(--hp-text);
  font-weight: 500;
  min-width: 130px;
  white-space: nowrap;
}

.shortcuts-table kbd {
  display: inline-block;
  padding: 2px 8px;
  background: rgba(30, 41, 59, 0.8);
  border: 1px solid rgba(148, 163, 184, 0.15);
  border-radius: 5px;
  font-size: 0.7rem;
  font-weight: 600;
  font-family: 'Fira Code', 'JetBrains Mono', monospace;
  color: #e2e8f0;
  letter-spacing: 0.02em;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.shortcuts-table tr:hover kbd {
  border-color: rgba(212, 196, 240, 0.25);
  background: rgba(30, 41, 59, 1);
}

body.modal-open {
  overflow: hidden;
}

body.shortcuts-modal-open .navbar {
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

/* ── 15. SCROLL REVEAL ── */
.hp-reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.hp-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── 16. SKIP-TO-CONTENT LINK ── */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  padding: 12px 24px;
  background: var(--hp-lavender);
  color: #0E0E14;
  font-family: 'Inter', sans-serif;
  font-size: 0.9rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 0 0 12px 12px;
  z-index: 10000;
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
}

.skip-link:focus-visible {
  outline: 2px solid var(--hp-text) !important;
  outline-offset: 2px !important;
}

/* ── 16.5. MINI PATHFINDING GRID ── */
.hp-mini-grid {
  display: grid;
  grid-template-columns: repeat(var(--cols, 22), 1fr);
  gap: 2px;
  padding: 8px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--hp-radius-sm);
  width: 100%;
}

.hp-mini-cell {
  aspect-ratio: 1;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.15s ease;
  min-width: 8px;
  min-height: 8px;
}

.hp-mini-cell:hover {
  border-color: rgba(var(--hp-lavender-rgb), 0.3);
}

.hp-mini-cell.hp-mini-start {
  background: var(--hp-mint);
  border-color: var(--hp-mint);
  box-shadow: 0 0 6px rgba(196, 226, 208, 0.5);
}

.hp-mini-cell.hp-mini-target {
  background: var(--hp-rose);
  border-color: var(--hp-rose);
  box-shadow: 0 0 6px rgba(237, 200, 210, 0.5);
}

.hp-mini-cell.hp-mini-wall {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.1);
}

.hp-mini-cell.hp-mini-visited {
  background: rgba(212, 196, 240, 0.4);
  border-color: rgba(212, 196, 240, 0.2);
  animation: hpMiniVisitPulse 0.3s ease;
}

.hp-mini-cell.hp-mini-path {
  background: rgba(242, 213, 196, 0.6);
  border-color: var(--hp-peach);
  animation: hpMiniPathPulse 0.3s ease;
}

@keyframes hpMiniVisitPulse {
  0% { transform: scale(0.6); opacity: 0.4; border-radius: 50%; }
  100% { transform: scale(1); opacity: 1; border-radius: 2px; }
}

@keyframes hpMiniPathPulse {
  0% { transform: scale(0.7); opacity: 0.5; }
  100% { transform: scale(1); opacity: 1; }
}

.hp-mini-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 8px 8px;
  flex-wrap: wrap;
}

@media (prefers-reduced-motion: reduce) {
  .hp-mini-cell { transition: none; }
  .hp-mini-cell.hp-mini-visited,
  .hp-mini-cell.hp-mini-path { animation: none; }
}

/* ── 17. ACCESSIBILITY ── */
.hp-btn:focus-visible,
.hp-quick-card:focus-visible,
.hp-pathway-card:focus-visible,
.hp-topic-card:focus-visible,
.hp-feature-card:focus-visible,
.hp-leaderboard-link:focus-visible,
.hp-facts-btn:focus-visible,
.hp-progress-cta:focus-visible {
  outline: 2px solid var(--hp-lavender) !important;
  outline-offset: 3px !important;
  border-radius: var(--hp-radius-sm);
}

/* ── 18. REDUCED MOTION ── */
@media (prefers-reduced-motion: reduce) {
  .hp-hero-shapes { display: none; }
  .hp-shape { animation: none !important; }
  .hp-reveal { opacity: 1; transform: none; transition: none; }
  .hp-hero-badge,
  .hp-hero-title,
  .hp-hero-subtitle,
  .hp-hero-actions,
  .hp-hero-stats { animation: none !important; opacity: 1 !important; }
  .hp-quick-card,
  .hp-pathway-card,
  .hp-topic-card,
  .hp-feature-card,
  .hp-visualizer-card,
  .hp-leaderboard-link { transition: none !important; }
  .hp-quick-card:hover,
  .hp-pathway-card:hover,
  .hp-topic-card:hover,
  .hp-feature-card:hover,
  .hp-visualizer-card:hover,
  .hp-leaderboard-link:hover { transform: none !important; }
}

/* ── 19. RESPONSIVE - TABLET ── */
@media (max-width: 1024px) {
  .hp-hero { min-height: 80vh; padding: 100px 24px 60px; }
  .hp-section { padding: 60px 24px; }
  .hp-quick-grid {
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto;
  }
  .hp-quick-card--daily { grid-row: auto; grid-column: auto; }
  .hp-quick-card--flashcards { grid-row: auto; grid-column: auto; }
  .hp-quick-card--quiz { grid-row: auto; grid-column: auto; }
  .hp-quick-card--tutor { grid-row: auto; grid-column: 1 / 3; }
  .hp-visualizer-layout { grid-template-columns: 1fr; }
  .hp-visualizer-preview { height: 200px; }
  .hp-pathways-grid { grid-template-columns: 1fr; }
  .hp-topics-grid { grid-template-columns: repeat(3, 1fr); }
  .hp-features-grid { grid-template-columns: 1fr; }
  .hp-leaderboard-grid { grid-template-columns: 1fr; }
}

/* ── 20. RESPONSIVE - MOBILE ── */
@media (max-width: 640px) {
  /* ── Section base ── */
  .hp-section {
    padding: 40px 16px;
  }

  .hp-section-header {
    margin-bottom: 24px;
    max-width: 100%;
  }

  .hp-section-eyebrow {
    font-size: 0.65rem;
    margin-bottom: 8px;
  }

  .hp-section-eyebrow::before {
    width: 16px;
  }

  .hp-section-title {
    font-size: 1.35rem;
  }

  .hp-section-subtitle {
    font-size: 0.85rem;
    margin-top: 8px;
    max-width: 100%;
  }

  /* ── Hero ── */
  .hp-hero {
    min-height: auto;
    padding: 100px 16px 48px;
  }

  .hp-hero::after {
    height: 60px;
  }

  .hp-shape {
    opacity: 0.08;
    filter: blur(24px);
  }

  .hp-shape:nth-child(1) {
    width: 180px;
    height: 180px;
    top: 2%;
    left: -20%;
    animation-duration: 35s;
  }

  .hp-shape:nth-child(2) {
    width: 150px;
    height: 150px;
    bottom: 15%;
    right: -12%;
    animation-duration: 30s;
  }

  .hp-shape:nth-child(3),
  .hp-shape:nth-child(4),
  .hp-shape:nth-child(5) {
    display: none;
  }

  .hp-hero-content {
    max-width: 100%;
  }

  .hp-hero-title {
    font-size: 1.8rem;
    margin: 0 0 12px;
  }

  .hp-hero-subtitle {
    font-size: 0.92rem;
    line-height: 1.6;
    margin: 0 auto 28px;
    max-width: 340px;
  }

  .hp-hero-actions {
    gap: 10px;
    margin-bottom: 36px;
    flex-direction: row;
    justify-content: center;
  }

  .hp-hero-actions .hp-btn {
    padding: 8px 16px;
    font-size: 0.78rem;
    min-height: 34px;
  }

  .hp-hero-stats {
    gap: 24px;
    justify-content: center;
  }

  .hp-stat-item {
    text-align: center;
  }

  .hp-stat-number {
    font-size: 1.2rem;
  }

  .hp-stat-label {
    font-size: 0.68rem;
    margin-top: 2px;
  }

  /* ── Progress strip ── */
  .hp-progress {
    padding: 4px 16px 12px;
  }

  .hp-progress-inner {
    flex-direction: column;
    gap: 10px;
  }

  .hp-progress-left {
    width: 100%;
    gap: 10px;
    flex-wrap: nowrap;
  }

  .hp-level-badge {
    padding: 4px 10px;
    gap: 4px;
  }

  .hp-level-number {
    font-size: 0.95rem;
  }

  .hp-level-label {
    font-size: 0.65rem;
  }

  .hp-xp-bar-wrap {
    min-width: 0;
    flex: 1;
  }

  .hp-xp-text {
    font-size: 0.65rem;
  }

  .hp-streak {
    padding: 4px 10px;
    font-size: 0.72rem;
  }

  .hp-streak-number {
    font-size: 0.85rem;
  }

  .hp-progress-cta {
    padding: 6px 12px;
    font-size: 0.72rem;
    justify-content: center;
    width: 100%;
    border: 1px solid rgba(var(--hp-lavender-rgb), 0.1);
    background: rgba(var(--hp-lavender-rgb), 0.04);
    border-radius: 100px;
  }

  /* ── Quick actions: compact mobile cards ── */
  .hp-quick-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .hp-quick-card--daily,
  .hp-quick-card--flashcards,
  .hp-quick-card--quiz,
  .hp-quick-card--tutor {
    grid-row: auto;
    grid-column: auto;
  }

  .hp-quick-card {
    padding: 16px 18px;
    border-radius: 14px;
    flex-direction: row;
    align-items: center;
    gap: 14px;
    min-height: 56px;
  }

  .hp-quick-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    font-size: 0.9rem;
    margin-bottom: 0;
    flex-shrink: 0;
  }

  .hp-quick-card--daily {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 20px;
  }

  .hp-quick-card--daily .hp-quick-icon {
    margin-bottom: 12px;
  }

  .hp-quick-card--tutor {
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 20px;
  }

  .hp-quick-card--tutor .hp-quick-icon {
    margin-bottom: 12px;
  }

  .hp-quick-card-title {
    font-size: 0.92rem;
    margin: 0;
  }

  .hp-quick-card--daily .hp-quick-card-title,
  .hp-quick-card--tutor .hp-quick-card-title {
    margin-bottom: 4px;
  }

  .hp-quick-card-desc {
    font-size: 0.75rem;
    display: none;
  }

  .hp-quick-card--daily .hp-quick-card-desc,
  .hp-quick-card--tutor .hp-quick-card-desc {
    display: block;
    margin-bottom: 8px;
  }

  .hp-quick-card-meta {
    margin-top: 0;
    font-size: 0.65rem;
  }

  .hp-quick-card--daily .hp-quick-card-meta {
    margin-top: 0;
  }

  .hp-quick-card--tutor .hp-quick-demo-badge {
    margin-top: 4px;
    font-size: 0.65rem;
    padding: 3px 10px;
  }

  /* ── Pathways ── */
  .hp-pathways-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .hp-pathway-card {
    padding: 20px;
    border-radius: 14px;
  }

  .hp-pathway-header {
    margin-bottom: 12px;
  }

  .hp-pathway-icon {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    font-size: 0.95rem;
  }

  .hp-pathway-title {
    font-size: 1rem;
  }

  .hp-pathway-desc {
    font-size: 0.78rem;
    margin-bottom: 12px;
  }

  .hp-pathway-tag {
    font-size: 0.65rem;
    padding: 4px 10px;
  }

  /* ── Visualizer ── */
  .hp-visualizer-section {
    padding: 24px 16px 40px;
  }

  .hp-visualizer-card {
    padding: 16px;
    border-radius: 14px;
  }

  .hp-visualizer-badge {
    font-size: 0.65rem;
    padding: 3px 10px;
    margin-bottom: 10px;
  }

  .hp-visualizer-layout {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .hp-visualizer-info-title {
    font-size: 1.1rem;
    margin-bottom: 4px;
  }

  .hp-visualizer-info-desc {
    font-size: 0.78rem;
    margin-bottom: 12px;
  }

  .hp-visualizer-preview {
    height: auto;
    min-height: 160px;
    border-radius: 8px;
  }

  /* Mini grid: compact for mobile */
  .hp-mini-grid {
    gap: 1px;
    padding: 4px;
  }

  .hp-mini-toolbar {
    gap: 4px;
    padding: 0 4px 4px;
  }

  .hp-mini-toolbar .hp-btn {
    padding: 6px 12px;
    font-size: 0.7rem;
    min-height: 32px;
  }

  .hp-mini-toolbar span:not(#hpVizPathLen) {
    display: none;
  }

  /* ── Topics: compact 2-col ── */
  .hp-topics-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
  }

  .hp-topic-card {
    padding: 14px;
    border-radius: 14px;
  }

  .hp-topic-icon {
    font-size: 1.2rem;
    margin-bottom: 8px;
  }

  .hp-topic-name {
    font-size: 0.82rem;
    margin-bottom: 4px;
  }

  .hp-topic-meta {
    font-size: 0.68rem;
    gap: 6px;
  }

  .hp-topic-difficulty-dot {
    width: 4px;
    height: 4px;
  }

  /* ── Did You Know? ── */
  .hp-facts-card {
    padding: 20px 24px;
    border-radius: 16px;
  }

  .hp-facts-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 14px;
  }

  .hp-facts-title h3 {
    font-size: 1rem;
  }

  .hp-facts-btn {
    font-size: 0.72rem;
    padding: 8px 16px;
    min-height: 36px;
  }

  .hp-fact-text {
    font-size: 0.95rem;
    line-height: 1.6;
    min-height: 2.4rem;
  }

  .hp-facts-footer {
    font-size: 0.68rem;
    padding-top: 12px;
  }

  .hp-facts-counter {
    font-size: 0.65rem;
  }

  /* ── Topic of the Day ── */
  #topic-of-the-day .hp-facts-card {
    padding: 14px 16px;
    border-radius: 14px;
  }

  #topic-of-the-day .hp-facts-header {
    margin-bottom: 10px;
  }

  #topic-of-the-day .hp-facts-title h3 {
    font-size: 0.85rem;
  }

  #topic-of-the-day .hp-facts-icon {
    font-size: 1rem;
  }

  #topic-of-the-day .hp-facts-content {
    gap: 10px !important;
    flex-direction: column !important;
    align-items: flex-start !important;
  }

  #topic-of-the-day #totdIcon {
    font-size: 1.5rem !important;
    margin-bottom: 2px !important;
  }

  #topic-of-the-day [style*="min-width: 200px"] {
    min-width: 0 !important;
    width: 100%;
  }

  #topic-of-the-day #totdTitle {
    font-size: 1rem !important;
    margin: 0 0 4px !important;
  }

  #topic-of-the-day #totdDesc {
    font-size: 0.78rem;
    margin: 0 0 8px !important;
  }

  #topic-of-the-day [style*="gap: 16px"] {
    gap: 8px !important;
    font-size: 0.72rem !important;
  }

  #topic-of-the-day .totd-btn {
    padding: 6px 14px !important;
    font-size: 0.75rem !important;
    min-height: 32px !important;
    align-self: flex-start;
  }

  /* ── Features: compact single col ── */
  .hp-features-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .hp-feature-card {
    padding: 14px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
  }

  .hp-feature-stat {
    font-size: 0.95rem;
    margin-bottom: 0;
    flex-shrink: 0;
    min-width: 36px;
    text-align: center;
  }

  .hp-feature-title {
    font-size: 0.85rem;
    margin-bottom: 1px;
  }

  .hp-feature-desc {
    font-size: 0.72rem;
  }

  /* ── Leaderboard ── */
  .hp-leaderboard-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .hp-leaderboard-card {
    padding: 20px;
    border-radius: 14px;
  }

  .hp-leaderboard-list {
    gap: 4px;
  }

  .hp-leaderboard-row {
    padding: 8px 10px;
    gap: 10px;
    min-height: 40px;
    border-radius: 10px;
  }

  .hp-leaderboard-rank {
    font-size: 0.75rem;
    width: 18px;
  }

  .hp-leaderboard-avatar {
    width: 28px;
    height: 28px;
    font-size: 0.72rem;
  }

  .hp-leaderboard-name {
    font-size: 0.82rem;
  }

  .hp-leaderboard-xp {
    font-size: 0.72rem;
  }

  .hp-leaderboard-link {
    padding: 16px;
    border-radius: 14px;
    font-size: 0.82rem;
    min-height: 48px;
  }

  /* ── CTA Band ── */
  .hp-cta-band {
    padding: 48px 16px;
  }

  .hp-cta-title {
    font-size: 1.4rem;
  }

  .hp-cta-subtitle {
    font-size: 0.88rem;
    margin-bottom: 24px;
  }

  .hp-cta-band .hp-btn {
    padding: 8px 20px;
    font-size: 0.78rem;
    min-height: 34px;
  }

  /* ── Prevent sticky hover states on touch devices ── */
  .hp-quick-card:hover,
  .hp-pathway-card:hover,
  .hp-topic-card:hover,
  .hp-feature-card:hover,
  .hp-feature-icon:hover {
    transform: none !important;
  }

  .hp-quick-card::before {
    display: none;
  }

  /* ── Touch-friendly adjustments ── */
  .hp-btn,
  .hp-quick-card,
  .hp-pathway-card,
  .hp-topic-card,
  .hp-leaderboard-row,
  .hp-leaderboard-link {
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
  }

  .hp-btn {
    min-height: 34px;
    padding: 8px 18px;
    font-size: 0.78rem;
  }

  .hp-quick-card,
  .hp-pathway-card,
  .hp-topic-card,
  .hp-leaderboard-row {
    cursor: pointer;
  }

  /* ── Hide floating utility buttons ── */
  .scroll-top-btn,
  .shortcuts-toggle-btn,
  #pwa-storage-usage {
    display: none !important;
  }

  /* ── Hide breadcrumbs on mobile ── */
  .breadcrumb-bar {
    display: none !important;
  }

  /* ── Compressed footer ── */
  .footer {
    padding: 16px 12px 12px;
  }

  .footer-bg-pattern {
    display: none;
  }

  .footer-content {
    grid-template-columns: 1fr 1fr;
    gap: 10px 8px;
  }

  .footer-section.footer-brand {
    grid-column: 1 / -1;
  }

  .footer-section:last-of-type {
    grid-column: 1 / -1;
  }

  .footer-brand-heading {
    gap: 4px;
  }

  .footer-logo-symbol {
    font-size: 1rem;
  }

  .footer-logo-top {
    font-size: 0.75rem;
  }

  .footer-logo-bottom {
    font-size: 0.5rem;
  }

  .footer-tagline {
    font-size: 0.65rem;
    margin-bottom: 6px;
    line-height: 1.3;
  }

  .social-links {
    gap: 6px;
  }

  .social-links a {
    font-size: 0.8rem;
  }

  .footer-heading {
    font-size: 0.68rem;
    gap: 3px;
    margin-bottom: 4px;
  }

  .footer-heading i {
    font-size: 0.55rem;
  }

  .footer-links {
    gap: 1px;
  }

  .footer-links li a {
    font-size: 0.65rem;
    padding: 3px 4px;
    gap: 3px;
  }

  .footer-links li a i {
    font-size: 0.5rem;
    width: 10px;
  }

  .footer-newsletter {
    margin-top: 6px;
    padding-top: 6px;
  }

  .footer-newsletter-label {
    font-size: 0.62rem;
  }

  .newsletter-input-wrap input {
    font-size: 0.65rem;
    padding: 4px 8px;
    min-height: 28px;
  }

  .newsletter-input-wrap button {
    width: 28px;
    height: 28px;
    font-size: 0.65rem;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 4px;
    padding-top: 10px;
    margin-top: 12px;
    text-align: center;
  }

  .footer-copyright {
    font-size: 0.6rem;
  }

  .footer-bottom-links {
    gap: 3px;
    font-size: 0.58rem;
    justify-content: center;
  }

  .footer-link-dot {
    font-size: 0.45rem;
  }

  .footer-heart {
    font-size: 0.6rem;
  }

  @media (prefers-reduced-motion: reduce) {
    .hp-shape { display: none; }
  }
}

/* ── 21. RESPONSIVE - SMALL MOBILE (≤380px) ── */
@media (max-width: 380px) {
  .hp-hero-title {
    font-size: 1.5rem;
  }

  .hp-hero-actions .hp-btn {
    padding: 8px 16px;
    font-size: 0.75rem;
  }

  .hp-hero-stats {
    gap: 16px;
  }

  .hp-stat-number {
    font-size: 1rem;
  }

  .hp-topics-grid {
    gap: 8px;
  }

  .hp-topic-card {
    padding: 12px;
  }

  .hp-topic-icon {
    font-size: 1rem;
    margin-bottom: 6px;
  }

  .hp-topic-name {
    font-size: 0.75rem;
  }

  .hp-quick-card {
    padding: 12px 14px;
  }

  .hp-quick-card--daily,
  .hp-quick-card--tutor {
    padding: 16px;
  }

  .hp-quick-icon {
    width: 30px;
    height: 30px;
    font-size: 0.8rem;
  }

  .hp-visualizer-card {
    padding: 14px;
  }

  .hp-feature-card {
    padding: 14px;
    gap: 10px;
  }

  .hp-leaderboard-card {
    padding: 14px;
  }
}