/* ============================================================
   NSTN Hub — Design Tokens & Component Styles
   Dark-first theme: #0a0e17 bg, teal #00c8c8 accent,
   purple #b478ff secondary, success #50dc96
   ============================================================ */

/* --- FONTS --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

/* --- DESIGN TOKENS --- */
:root {
  /* Type scale (fluid) */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* Spacing (4px base) */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Fonts */
  --font-body: 'Inter', 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
  --font-display: 'Inter', 'Helvetica Neue', sans-serif;

  /* Colors — dark theme */
  --color-bg:           #0a0e17;
  --color-surface:      #111827;
  --color-surface-2:    #1a2234;
  --color-surface-3:    #243049;
  --color-border:       rgba(255,255,255,0.08);
  --color-border-hover: rgba(255,255,255,0.15);
  --color-divider:      rgba(255,255,255,0.06);

  /* Text */
  --color-text:         #e8eaed;
  --color-text-muted:   #8b95a5;
  --color-text-faint:   #4d5a6e;
  --color-text-inverse: #0a0e17;

  /* Primary — Teal */
  --color-primary:        #00c8c8;
  --color-primary-hover:  #00e0e0;
  --color-primary-active: #00a8a8;
  --color-primary-glow:   rgba(0, 200, 200, 0.15);
  --color-primary-subtle: rgba(0, 200, 200, 0.08);

  /* Secondary — Purple */
  --color-secondary:        #b478ff;
  --color-secondary-hover:  #c898ff;
  --color-secondary-active: #9a58e0;
  --color-secondary-glow:   rgba(180, 120, 255, 0.15);

  /* Success */
  --color-success:      #50dc96;
  --color-success-glow: rgba(80, 220, 150, 0.15);

  /* Warning */
  --color-warning:      #ffb347;

  /* Error */
  --color-error:        #ff6b6b;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 300ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
  --shadow-glow-teal: 0 0 20px rgba(0,200,200,0.15);
  --shadow-glow-purple: 0 0 20px rgba(180,120,255,0.15);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;
}

/* ============================================================
   LAYOUT
   ============================================================ */

.container {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-4);
}

.container--narrow {
  max-width: var(--content-narrow);
}

.container--default {
  max-width: var(--content-default);
}

/* ============================================================
   HEADER / NAV
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(10, 14, 23, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-3) 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: -0.02em;
}

.nav-logo svg {
  flex-shrink: 0;
}

.nav-logo .logo-nstn {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav-links a {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--transition-interactive);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--color-primary);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-primary);
  color: var(--color-text-inverse) !important;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  transition: background var(--transition-interactive),
              box-shadow var(--transition-interactive);
}

.nav-cta:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-glow-teal);
}

.mobile-menu-btn {
  display: none;
  padding: var(--space-2);
  color: var(--color-text);
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(10, 14, 23, 0.97);
    backdrop-filter: blur(16px);
    padding: var(--space-4);
    gap: var(--space-4);
    border-bottom: 1px solid var(--color-border);
  }
  .nav-links.open { display: flex; }
  .mobile-menu-btn { display: block; }
}

/* ============================================================
   HERO
   ============================================================ */

.hero {
  padding: clamp(var(--space-16), 10vw, var(--space-32)) 0;
  text-align: left;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 60%;
  height: 100%;
  background: radial-gradient(ellipse, rgba(0,200,200,0.07) 0%, transparent 70%);
  pointer-events: none;
}

.hero-grid-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(rgba(0,200,200,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,200,200,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 60% 70% at 50% 40%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 60% 70% at 50% 40%, black 20%, transparent 70%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 40%;
  height: 80%;
  background: radial-gradient(ellipse, rgba(180,120,255,0.04) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-3);
  background: var(--color-primary-subtle);
  border: 1px solid rgba(0,200,200,0.2);
  border-radius: var(--radius-full);
  color: var(--color-primary);
  font-size: var(--text-xs);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-6);
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: var(--space-6);
  color: var(--color-text);
}

.hero h1 .accent {
  color: var(--color-primary);
}

.hero .subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-8);
  max-width: 600px;
}

.hero-install {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.install-box {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.install-box .prompt {
  color: var(--color-primary);
  user-select: none;
}

.install-box code {
  color: var(--color-text);
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  transition: all var(--transition-interactive);
}

.copy-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-subtle);
}

.copy-btn.copied {
  color: var(--color-success);
  border-color: var(--color-success);
}

.hero-link {
  color: var(--color-primary);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  transition: color var(--transition-interactive);
}

.hero-link:hover {
  color: var(--color-primary-hover);
}

/* ============================================================
   STATS BAR
   ============================================================ */

.stats-bar {
  padding: var(--space-8) 0;
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
}

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

.stat-value {
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-text);
  font-variant-numeric: tabular-nums;
}

.stat-value .teal { color: var(--color-primary); }
.stat-value .purple { color: var(--color-secondary); }
.stat-value .green { color: var(--color-success); }

.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}

@media (max-width: 640px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
}

/* ============================================================
   SECTION HEADINGS
   ============================================================ */

.section {
  padding: clamp(var(--space-12), 6vw, var(--space-20)) 0;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: var(--space-8);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.section-title {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-link {
  font-size: var(--text-sm);
  color: var(--color-primary);
  text-decoration: none;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.section-link:hover {
  color: var(--color-primary-hover);
}

/* ============================================================
   PACK CARD
   ============================================================ */

.pack-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  transition: border-color var(--transition-interactive),
              box-shadow var(--transition-slow),
              transform var(--transition-slow);
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  position: relative;
}

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

.pack-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
}

.pack-name {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  word-break: break-word;
}

.pack-author {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

.pack-author .namespace {
  color: var(--color-secondary);
}

.quality-score {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
}

.quality-score.excellent {
  background: rgba(80, 220, 150, 0.12);
  color: var(--color-success);
  border: 1px solid rgba(80, 220, 150, 0.25);
}

.quality-score.good {
  background: rgba(0, 200, 200, 0.12);
  color: var(--color-primary);
  border: 1px solid rgba(0, 200, 200, 0.25);
}

.quality-score.average {
  background: rgba(255, 179, 71, 0.12);
  color: var(--color-warning);
  border: 1px solid rgba(255, 179, 71, 0.25);
}

.pack-description {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
  flex: 1;
}

.pack-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px var(--space-2);
  border-radius: var(--radius-full);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.badge-zero-token {
  background: rgba(0, 200, 200, 0.12);
  color: var(--color-primary);
  border: 1px solid rgba(0, 200, 200, 0.2);
}

.badge-verified {
  background: rgba(80, 220, 150, 0.12);
  color: var(--color-success);
  border: 1px solid rgba(80, 220, 150, 0.2);
}

.badge-unverified {
  background: rgba(255, 179, 71, 0.08);
  color: var(--color-warning);
  border: 1px solid rgba(255, 179, 71, 0.15);
}

.badge-tier {
  background: rgba(180, 120, 255, 0.1);
  color: var(--color-secondary);
  border: 1px solid rgba(180, 120, 255, 0.2);
}

.badge-deterministic {
  background: rgba(232, 234, 237, 0.06);
  color: var(--color-text);
  border: 1px solid rgba(255,255,255,0.1);
}

.pack-meta {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-divider);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.pack-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.pack-meta-item svg {
  width: 14px;
  height: 14px;
  color: var(--color-text-faint);
}

.test-coverage {
  font-weight: 700;
}

.test-coverage.full {
  color: var(--color-success);
}

.test-coverage.partial {
  color: var(--color-warning);
}

/* ============================================================
   PACK GRIDS
   ============================================================ */

.featured-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(320px, 100%), 1fr));
  gap: var(--space-4);
}

.pack-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
}

@media (max-width: 1024px) {
  .pack-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .pack-grid { grid-template-columns: 1fr; }
}

/* ============================================================
   CATEGORIES
   ============================================================ */

.category-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

.category-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 500;
  text-decoration: none;
  transition: all var(--transition-interactive);
  cursor: pointer;
}

.category-chip:hover,
.category-chip.active {
  background: var(--color-primary-subtle);
  border-color: rgba(0,200,200,0.3);
  color: var(--color-primary);
}

.category-chip .count {
  font-size: 11px;
  color: var(--color-text-faint);
  font-variant-numeric: tabular-nums;
}

/* ============================================================
   TRENDING LIST
   ============================================================ */

.trending-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.trending-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: inherit;
  transition: all var(--transition-interactive);
  cursor: pointer;
}

.trending-item:hover {
  border-color: var(--color-border-hover);
  background: var(--color-surface-2);
}

.trending-rank {
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-text-faint);
  min-width: 2.5rem;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

.trending-item:nth-child(1) .trending-rank { color: var(--color-primary); }
.trending-item:nth-child(2) .trending-rank { color: var(--color-secondary); }
.trending-item:nth-child(3) .trending-rank { color: var(--color-success); }

.trending-info {
  flex: 1;
  min-width: 0;
}

.trending-name {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.trending-desc {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.trending-stats {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-xs);
  flex-shrink: 0;
}

@media (max-width: 640px) {
  .trending-item {
    flex-wrap: wrap;
  }
  .trending-stats {
    width: 100%;
    padding-left: calc(2.5rem + var(--space-4));
    margin-top: var(--space-1);
  }
  .trending-desc {
    white-space: normal;
  }
}

.trending-stats .stat-badge {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  color: var(--color-text-muted);
}

/* ============================================================
   BROWSE PAGE — FILTERS
   ============================================================ */

.browse-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-8);
  align-items: start;
}

@media (max-width: 768px) {
  .browse-layout {
    grid-template-columns: 1fr;
  }
}

.filter-sidebar {
  position: sticky;
  top: calc(60px + var(--space-4));
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

@media (max-width: 768px) {
  .filter-sidebar {
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
    gap: var(--space-4);
  }
}

.filter-group h3 {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-3);
}

.filter-option {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) 0;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: color var(--transition-interactive);
}

.filter-option:hover,
.filter-option.active {
  color: var(--color-primary);
}

.filter-option input[type="checkbox"] {
  accent-color: var(--color-primary);
}

.sort-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-3);
}

.sort-tabs {
  display: flex;
  gap: var(--space-1);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 3px;
  border: 1px solid var(--color-border);
}

.sort-tab {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  transition: all var(--transition-interactive);
  white-space: nowrap;
}

.sort-tab:hover {
  color: var(--color-text);
}

.sort-tab.active {
  background: var(--color-surface-2);
  color: var(--color-primary);
}

.result-count {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ============================================================
   PACK DETAIL PAGE
   ============================================================ */

.detail-header {
  padding: var(--space-12) 0 var(--space-8);
}

.detail-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.detail-breadcrumb a {
  color: var(--color-primary);
  text-decoration: none;
}

.detail-breadcrumb a:hover {
  text-decoration: underline;
}

.detail-title-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.detail-title {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
}

.detail-version {
  font-size: var(--text-sm);
  color: var(--color-text-faint);
  font-weight: 400;
}

.detail-author {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

.detail-author .ns {
  color: var(--color-secondary);
}

.detail-badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.detail-body {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--space-8);
  align-items: start;
  padding-bottom: var(--space-16);
}

@media (max-width: 768px) {
  .detail-body { grid-template-columns: 1fr; }
}

.detail-main {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.detail-sidebar {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  position: sticky;
  top: calc(60px + var(--space-4));
}

@media (max-width: 768px) {
  .detail-sidebar { position: static; order: -1; }
}

.detail-install-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.detail-install-card h3 {
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-3);
  color: var(--color-text);
}

.detail-install-cmd {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  overflow-x: auto;
}

.detail-install-cmd .prompt {
  color: var(--color-primary);
  user-select: none;
}

.detail-install-cmd code {
  color: var(--color-text);
  flex: 1;
  white-space: nowrap;
}

.detail-stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}

.detail-stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.detail-stat {
  text-align: center;
}

.detail-stat .value {
  font-size: var(--text-lg);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

.detail-stat .label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}

/* Functions list */
.detail-section h2 {
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--color-divider);
}

.function-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.function-item {
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.function-sig {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.function-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.function-example {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  overflow-x: auto;
}

.function-example .comment {
  color: var(--color-text-faint);
}

.function-example .output {
  color: var(--color-success);
}

/* Collapsible */
.collapsible-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
  padding: var(--space-3) 0;
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  font-weight: 600;
  text-align: left;
  transition: color var(--transition-interactive);
}

.collapsible-toggle:hover {
  color: var(--color-primary);
}

.collapsible-toggle .chevron {
  transition: transform var(--transition-interactive);
}

.collapsible-toggle.open .chevron {
  transform: rotate(90deg);
}

.collapsible-content {
  display: none;
  padding-bottom: var(--space-4);
}

.collapsible-content.open {
  display: block;
}

.toml-preview {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre;
}

.toml-preview .key { color: var(--color-primary); }
.toml-preview .string { color: var(--color-success); }
.toml-preview .section-header { color: var(--color-secondary); }
.toml-preview .comment { color: var(--color-text-faint); }

/* ============================================================
   SUBMIT / CONTRIBUTE PAGE
   ============================================================ */

.contribute-hero {
  padding: var(--space-16) 0 var(--space-12);
}

.contribute-hero h1 {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.contribute-hero p {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 600px;
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(300px, 100%), 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-16);
}

.step-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: relative;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-primary-subtle);
  color: var(--color-primary);
  font-weight: 700;
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
  border: 1px solid rgba(0,200,200,0.2);
}

.step-card h3 {
  font-size: var(--text-base);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.step-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-4);
}

.code-block {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.7;
  overflow-x: auto;
  white-space: pre;
  position: relative;
  margin-bottom: var(--space-4);
}

.code-block .line-comment { color: var(--color-text-faint); }
.code-block .key { color: var(--color-primary); }
.code-block .string { color: var(--color-success); }
.code-block .keyword { color: var(--color-secondary); }
.code-block .type { color: var(--color-warning); }
.code-block .section-header { color: var(--color-secondary); }
.code-block .bracket { color: var(--color-text-muted); }

.code-block-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-bottom: none;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.code-block-header + .code-block {
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

.format-section {
  margin-bottom: var(--space-12);
}

.format-section h2 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.format-section > p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.requirement-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  list-style: none;
}

.requirement-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

.requirement-list li svg {
  color: var(--color-success);
  flex-shrink: 0;
  margin-top: 2px;
}

.pr-cta {
  text-align: center;
  padding: var(--space-12);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.pr-cta h2 {
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.pr-cta p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  margin-inline: auto;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  transition: all var(--transition-interactive);
}

.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: var(--shadow-glow-teal);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: var(--text-sm);
  text-decoration: none;
  transition: all var(--transition-interactive);
}

.btn-secondary:hover {
  background: var(--color-primary-subtle);
}

/* ============================================================
   FOOTER
   ============================================================ */

.site-footer {
  padding: var(--space-12) 0 var(--space-8);
  border-top: 1px solid var(--color-divider);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}

.footer-brand p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-3);
  max-width: 320px;
}

.footer-col h4 {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-3);
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer-col a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.footer-col a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* ============================================================
   ANIMATIONS
   ============================================================ */

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.animate-in {
  animation: fadeInUp 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  opacity: 0;
}

.animate-in:nth-child(1) { animation-delay: 0ms; }
.animate-in:nth-child(2) { animation-delay: 60ms; }
.animate-in:nth-child(3) { animation-delay: 120ms; }
.animate-in:nth-child(4) { animation-delay: 180ms; }
.animate-in:nth-child(5) { animation-delay: 240ms; }
.animate-in:nth-child(6) { animation-delay: 300ms; }
.animate-in:nth-child(7) { animation-delay: 360ms; }
.animate-in:nth-child(8) { animation-delay: 420ms; }

/* ============================================================
   SCROLLBAR
   ============================================================ */

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-surface-3); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-text-faint); }

/* ============================================================
   UTILITIES
   ============================================================ */

.text-teal { color: var(--color-primary); }
.text-purple { color: var(--color-secondary); }
.text-green { color: var(--color-success); }
.text-muted { color: var(--color-text-muted); }
.text-faint { color: var(--color-text-faint); }
.text-mono { font-family: var(--font-mono); }

.hidden { display: none !important; }

/* Page transitions */
.page { display: none; }
.page.active { display: block; }