/* ============================================================
   LingualSafety 1.0 - Main Stylesheet
   ============================================================ */

/* -- Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&family=Crimson+Pro:ital,wght@0,400;0,600;1,400&display=swap');

/* -- Design Tokens */
:root {
  /* Color palette - Normal Light Theme */
  --clr-bg:          #ffffff;
  --clr-bg-alt:      #f8f9fa;
  --clr-surface:     #ffffff;
  --clr-surface-2:   #f1f3f5;
  --clr-border:      #dee2e6;
  --clr-border-light:#ced4da;

  --clr-primary:     #0056b3; /* normal blue */
  --clr-primary-dim: #004085;
  --clr-primary-glow:rgba(0,86,179,0.08);
  --clr-accent:      #0056b3; /* normal blue */
  --clr-accent-dim:  #004085;
  --clr-teal:        #0056b3; /* normal blue */
  --clr-teal-dim:    #004085;
  --clr-green:       #198754;
  --clr-amber:       #ffc107;
  --clr-rose:        #dc3545;

  /* Text - Black and dark gray */
  --clr-text-1:      #111111;
  --clr-text-2:      #212529;
  --clr-text-3:      #495057;
  --clr-text-4:      #6c757d;

  /* Typography */
  --font-sans:       'Inter', system-ui, -apple-system, sans-serif;
  --font-mono:       'JetBrains Mono', 'Fira Code', monospace;
  --font-serif:      'Crimson Pro', Georgia, serif;

  /* Spacing scale */
  --space-xs:   0.25rem;
  --space-sm:   0.5rem;
  --space-md:   1rem;
  --space-lg:   1.5rem;
  --space-xl:   2rem;
  --space-2xl:  3rem;
  --space-3xl:  4rem;
  --space-4xl:  6rem;

  /* Layout */
  --max-width:  1200px;
  --nav-height: 64px;

  /* Borders */
  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --radius-xl:  16px;
  --radius-2xl: 24px;
  --radius-pill:9999px;

  /* Shadows - Minimal for light theme */
  --shadow-sm:  0 1px 2px rgba(0,0,0,0.05);
  --shadow-md:  0 4px 6px rgba(0,0,0,0.05);
  --shadow-lg:  0 10px 15px rgba(0,0,0,0.05);
  --shadow-glow:0 0 0 3px rgba(0,86,179,0.15);

  /* Transitions */
  --transition: 200ms cubic-bezier(0.4,0,0.2,1);
  --transition-slow: 400ms cubic-bezier(0.4,0,0.2,1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--clr-bg);
  color: var(--clr-text-2);
  line-height: 1.7;
  font-size: 1rem;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--clr-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--clr-primary); text-decoration: underline; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* -- Utility */
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-xl); }
.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; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.badge--primary { background: var(--clr-primary-glow); color: var(--clr-primary); border: 1px solid rgba(0,86,179,0.2); }
.badge--accent  { background: var(--clr-primary-glow); color: var(--clr-primary); border: 1px solid rgba(0,86,179,0.2); }
.badge--teal    { background: var(--clr-primary-glow); color: var(--clr-primary); border: 1px solid rgba(0,86,179,0.2); }
.badge--green   { background: rgba(25,135,84,0.08); color: var(--clr-green); border: 1px solid rgba(25,135,84,0.2); }
.badge--amber   { background: rgba(255,193,7,0.08); color: var(--clr-amber); border: 1px solid rgba(255,193,7,0.2); }

.section-label {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-primary);
  margin-bottom: var(--space-lg);
}
.section-label::before {
  content: '';
  display: block;
  width: 20px;
  height: 2px;
  background: var(--clr-primary);
  border-radius: var(--radius-pill);
}

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--clr-text-1);
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: 1.075rem;
  color: var(--clr-text-3);
  max-width: 1200px;
  line-height: 1.75;
}

.section-header { margin-bottom: var(--space-2xl); }

.about-header .section-label {
  margin-bottom: var(--space-4xl);
}

.tba {
  color: var(--clr-text-4);
  font-style: italic;
  font-size: 0.875rem;
}

/* -- Navigation */
#nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: var(--clr-bg);
  border-bottom: 1px solid var(--clr-border);
}
#nav.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 800;
  font-size: 1rem;
  color: var(--clr-text-1);
  white-space: nowrap;
  flex-shrink: 0;
}
.nav-logo span.logo-accent { color: var(--clr-primary); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  flex: 1;
  justify-content: center;
}

.nav-link {
  padding: var(--space-xs) var(--space-sm);
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--clr-text-3);
  border-radius: var(--radius-md);
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}
.nav-link:hover, .nav-link.active { color: var(--clr-text-1); background: var(--clr-surface-2); }

.nav-cta {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.5rem 1.125rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  background: var(--clr-primary);
  color: #fff;
  border-color: var(--clr-primary);
}
.btn--primary:hover {
  background: var(--clr-primary-dim);
  border-color: var(--clr-primary-dim);
  color: #fff;
}
.btn--outline {
  background: transparent;
  color: var(--clr-primary);
  border-color: var(--clr-border);
}
.btn--outline:hover {
  border-color: var(--clr-primary);
  color: var(--clr-primary);
  background: var(--clr-primary-glow);
}
.btn--ghost {
  background: var(--clr-bg-alt);
  color: var(--clr-text-2);
  border-color: var(--clr-border);
}
.btn--ghost:hover {
  background: var(--clr-surface-2);
  color: var(--clr-text-1);
}
.btn--lg {
  padding: 0.75rem 1.75rem;
  font-size: 0.9375rem;
  border-radius: var(--radius-lg);
}

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-sm);
  border-radius: var(--radius-md);
  background: var(--clr-bg-alt);
  border: 1px solid var(--clr-border);
  cursor: pointer;
}
.nav-hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--clr-text-2);
  border-radius: var(--radius-pill);
}

/* Mobile drawer */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0; right: 0;
  background: var(--clr-bg);
  border-bottom: 1px solid var(--clr-border);
  padding: var(--space-lg) var(--space-xl);
  flex-direction: column;
  gap: var(--space-xs);
  z-index: 999;
  transform: translateY(-10px);
  opacity: 0;
  pointer-events: none;
  transition: transform var(--transition-slow), opacity var(--transition-slow);
}
.nav-mobile.open {
  display: flex;
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.nav-mobile .nav-link {
  padding: var(--space-sm) var(--space-md);
  font-size: 0.9375rem;
  border: 1px solid transparent;
}
.nav-mobile .nav-link:hover {
  border-color: var(--clr-border);
}
.nav-mobile .btn { width: 100%; justify-content: center; margin-top: var(--space-sm); }

/* -- Hero */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: var(--nav-height);
  overflow: hidden;
  background: var(--clr-bg);
}

.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,86,179,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,86,179,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero-radial, .hero-orb {
  display: none; /* Hide active colorful gradients and glowing orbs */
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 1000px;
  text-align: center;
  margin: 0 auto;
  padding: var(--space-4xl) 0;
}

.hero-title {
  font-size: clamp(1.5rem, 5vw, 4rem);
  font-weight: 800;
  color: var(--clr-text-1);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-lg);
}
.hero-title .title-accent {
  color: var(--clr-primary);
}
.hero-title .title-rest {
  color: var(--clr-text-1);
}

.hero-subtitle {
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  color: var(--clr-text-2);
  font-weight: 500;
  margin-bottom: var(--space-md);
  line-height: 1.45;
}

.hero-desc {
  font-size: 1.0625rem;
  color: var(--clr-text-3);
  max-width: 660px;
  line-height: 1.8;
  margin: 0 auto;
  margin-bottom: var(--space-2xl);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-bottom: var(--space-3xl);
  justify-content: center;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xl);
  justify-content: center;
}
.hero-meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.875rem;
  color: var(--clr-text-3);
}
.hero-meta-icon {
  width: 18px; height: 18px;
  color: var(--clr-primary);
  flex-shrink: 0;
}

/* -- Stats section */
#stats {
  padding: var(--space-3xl) 0;
  background: var(--clr-bg-alt);
  border-top: 1px solid var(--clr-border);
  border-bottom: 1px solid var(--clr-border);
}

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

.stat-card {
  text-align: center;
  padding: var(--space-xl) var(--space-lg);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}

.stat-card:hover {
  border-color: var(--clr-border-light);
}
.stat-number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--clr-primary);
  letter-spacing: -0.03em;
  line-height: 1;
  margin-bottom: var(--space-sm);
}
.stat-label {
  font-weight: 500;
  color: var(--clr-text-3);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
}

/* -- Generic sections */
.section {
  padding: var(--space-2xl) 0;
}
.section--alt { background: var(--clr-bg-alt); }
.section--surface { background: var(--clr-surface); }

/* -- About */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

.about-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: stretch;
}

.about-content {
  min-width: 0;
}

.about-image {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: center;
}

.about-image img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: var(--radius-lg);
}

.about-prose p {
  color: var(--clr-text-2);
  font-size: 1.075rem;
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}
.about-prose p:last-child { margin-bottom: 0; }
.about-highlights {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}


.highlight-card {
  padding: var(--space-lg);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
}
.highlight-card h3 {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--clr-primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: var(--space-sm);
}
.highlight-card p {
  font-size: 0.9375rem;
  color: var(--clr-text-2);
  line-height: 1.65;
}

/* -- Languages */
.languages-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--space-lg);
}
.lang-card {
  position: relative;
  padding: var(--space-xl) var(--space-lg);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  text-align: center;
}
.lang-card:hover {
  border-color: var(--clr-primary);
}
.lang-script {
  font-size: 2rem;
  line-height: 1;
  margin-bottom: var(--space-md);
}
.lang-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-text-1);
  margin-bottom: var(--space-xs);
}
.lang-native {
  font-size: 1.25rem;
  color: var(--clr-primary);
  font-weight: 600;
}

/* -- Attack settings */
.attacks-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}
.attack-card {
  padding: var(--space-xl);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}

.attack-card:hover { border-color: var(--clr-border-light); }
.attack-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-lg);
  font-size: 1.5rem;
}
.attack-card.plain .attack-icon { background: rgba(220,53,69,0.08); color: var(--clr-rose); }
.attack-card.persuasion .attack-icon { background: var(--clr-primary-glow); color: var(--clr-primary); }
.attack-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--clr-text-1);
  margin-bottom: var(--space-md);
}
.attack-card p {
  font-size: 0.9375rem;
  color: var(--clr-text-2);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}
.attack-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}
.attack-tag {
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--clr-surface-2);
  color: var(--clr-text-3);
  border: 1px solid var(--clr-border);
}

/* -- Technique list (plain text rows) */
.techniques-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--clr-border);
}
.technique-row {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: var(--space-xl);
  align-items: baseline;
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--clr-border);
  font-size: 0.9375rem;
}
.technique-label {
  font-weight: 700;
  color: var(--clr-text-1);
}
.technique-desc {
  color: var(--clr-text-3);
  line-height: 1.6;
}

/* -- Safety categories list */
.categories-list {
  columns: 2;
  column-gap: var(--space-3xl);
  list-style: none;
  padding: 0;
  margin: 0;
}
.categories-list li {
  font-size: 0.9375rem;
  color: var(--clr-text-2);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--clr-border);
  break-inside: avoid;
}
.categories-list li::before {
  content: '';
}

.technique-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-text-1);
  margin-bottom: var(--space-sm);
}
.technique-card p {
  font-size: 0.875rem;
  color: var(--clr-text-3);
  line-height: 1.65;
}


/* -- Tracks */
.tracks-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
}
.track-card {
  padding: var(--space-2xl);
  border-radius: var(--radius-xl);
  border: 1px solid var(--clr-border);
  position: relative;
  overflow: hidden;
}
.track-card.track-closed { background: var(--clr-surface); }
.track-card.track-open { background: var(--clr-surface); }

.track-card:hover {
  border-color: var(--clr-border-light);
}
.track-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}
.track-number {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-primary);
}
.track-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--clr-text-1);
  margin-bottom: var(--space-md);
}
.track-card p {
  font-size: 0.9375rem;
  color: var(--clr-text-2);
  line-height: 1.7;
  margin-bottom: var(--space-lg);
}
.track-rules {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.track-rule {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  font-size: 0.875rem;
  color: var(--clr-text-3);
}
.track-rule-icon {
  width: 16px; height: 16px;
  flex-shrink: 0;
  margin-top: 2px;
}
.track-rule-icon.allowed { color: var(--clr-green); }
.track-rule-icon.denied  { color: var(--clr-rose); }

/* -- Evaluation metrics */
.metrics-grid {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  margin-bottom: var(--space-3xl);
}
.metric-card {
  flex: 0 1 360px;
  padding: var(--space-2xl);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  position: relative;
  overflow: hidden;
}

.metric-card.css { border-color: var(--clr-primary); }
.metric-abbr {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-xs);
}
.metric-card.asr .metric-abbr  { color: var(--clr-rose); }
.metric-card.srr .metric-abbr  { color: var(--clr-green); }
.metric-card.css .metric-abbr  { color: var(--clr-primary); }
.metric-full-name {
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--clr-text-3);
  margin-bottom: var(--space-lg);
}
.metric-formula {
  display: flex;
  align-items: center;
  background: var(--clr-bg-alt);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--clr-text-2);
  line-height: 1.6;
  margin-bottom: var(--space-md);
  min-height: 120px;
}

.formula-line {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  width: 100%;
}

.formula-fraction {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  flex: 1;
}

.fraction-line {
  width: 100%;
  border-top: 1px solid currentColor;
  margin: 0.25rem 0;
}
.metric-card p {
  font-size: 0.875rem;
  color: var(--clr-text-3);
  line-height: 1.65;
}
/* -- Metric official badge inline */
.metric-official-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--clr-primary);
  background: var(--clr-primary-glow);
  border: 1px solid rgba(0,86,179,0.2);
  border-radius: var(--radius-pill);
  padding: 2px 7px;
  margin-left: var(--space-sm);
  vertical-align: middle;
}

/* -- Scoring Scheme */
.scoring-section {
  margin-top: var(--space-2xl);
}

.scoring-title {
  font-size: 1.5rem;
  margin-bottom: var(--space-sm);
}

.scoring-intro {
  max-width: 1000px;
  font-size: 0.9375rem;
  color: var(--clr-text-2);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
}

.scoring-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-xl);
}

.score-card {
  flex: 0 1 calc((100% - 2 * var(--space-xl)) / 3);
  max-width: 380px;
  padding: var(--space-xl);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
}

.score-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.score-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--clr-primary-glow);
  color: var(--clr-primary);
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
}

.score-header h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-text-1);
  margin: 0;
}

.score-content p {
  font-size: 0.875rem;
  color: var(--clr-text-3);
  line-height: 1.65;
  margin: 0;
}

/* -- Models / Resources (Button Cards) */
.models-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-lg);
}
.model-btn-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  flex: 0 1 290px;
  min-width: 220px;
  padding: var(--space-lg) var(--space-md);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  text-decoration: none;
  transition: all var(--transition);
}
.model-btn-card:hover {
  border-color: var(--clr-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  text-decoration: none;
}
.model-btn-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-text-1);
  font-family: var(--font-mono);
  margin-bottom: var(--space-xs);
  transition: color var(--transition);
}
.model-btn-card:hover .model-btn-name {
  color: var(--clr-primary);
}
.model-btn-org {
  font-size: 0.8125rem;
  color: var(--clr-primary);
  font-weight: 500;
}
.model-hf-link:hover {
  background: rgba(0,86,179,0.15);
  color: var(--clr-primary);
}

/* -- Submission */
.submission-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3xl);
  align-items: start;
}
.submission-column {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.submission-column h3 {
  font-size: 1.5rem;
  margin-bottom: 0;
}
.submission-column .section-subtitle {
  margin-bottom: 0;
}
.submission-column .btn {
  align-self: flex-start;
  margin-top: var(--space-sm);
}
.submission-main {
  padding: var(--space-2xl);
}
.submission-main h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--clr-text-1);
  margin-bottom: var(--space-md);
}
.submission-main p {
  font-size: 0.9375rem;
  color: var(--clr-text-2);
  line-height: 1.7;
  margin-bottom: var(--space-xl);
}
.submission-detail-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}
.submission-detail {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--clr-border);
  font-size: 0.9rem;
}
.submission-detail:last-child { border-bottom: none; }
.submission-detail-key {
  font-weight: 600;
  color: var(--clr-text-2);
  min-width: 150px;
}
.submission-detail-val {
  color: var(--clr-text-4);
  font-style: italic;
  text-align: right;
}

/* -- Baseline */
.baseline-card {
  padding: var(--space-2xl);
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  gap: var(--space-2xl);
}
.baseline-icon-wrap {
  width: 72px; height: 72px;
  border-radius: var(--radius-xl);
  background: var(--clr-primary-glow);
  border: 1px solid rgba(0,86,179,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  flex-shrink: 0;
}
.baseline-info { flex: 1; }
.baseline-info h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--clr-text-1);
  margin-bottom: var(--space-sm);
}
.baseline-info p {
  font-size: 0.9375rem;
  color: var(--clr-text-2);
  line-height: 1.7;
  margin-bottom: var(--space-md);
}

/* -- Academic Vertical Timeline / Dates */
.timeline-container {
  position: relative;
  max-width: 820px;
  margin: 0 auto;
  padding: var(--space-lg) 0;
}

.timeline-events {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

/* Fixed stationary vertical guideline */
.timeline-events::before {
  content: '';
  position: absolute;
  top: 14px;
  bottom: 14px;
  left: 175px;
  width: 2px;
  background: var(--clr-border);
  transform: translateX(-50%);
  z-index: 1;
}

/* Individual timeline row item */
.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 145px 60px 1fr;
  align-items: flex-start;
  z-index: 2;
  transition: transform var(--transition);
}

.timeline-item:hover {
  transform: translateX(4px);
}

/* Left date column */
.timeline-date-col {
  text-align: right;
  padding-right: var(--space-sm);
  padding-top: 2px;
}

.timeline-date {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--clr-text-3);
  letter-spacing: -0.01em;
}

/* Center node / marker column */
.timeline-node-col {
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  height: 28px;
}

.timeline-dot {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--clr-surface);
  border: 2px solid var(--clr-border-light);
  box-shadow: 0 0 0 4px var(--clr-surface);
  transition: all var(--transition);
}

/* Right content column */
.timeline-content-col {
  padding-left: var(--space-xs);
}

.timeline-title-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-sm);
}

.timeline-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--clr-text-1);
  line-height: 1.4;
  margin: 0;
}

.timeline-desc {
  font-size: 0.875rem;
  color: var(--clr-text-4);
  line-height: 1.5;
  margin-top: 4px;
}

/* Badge for current/upcoming active milestone */
.timeline-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-sans);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #ffffff;
  background: var(--clr-primary);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  box-shadow: 0 2px 6px rgba(0, 86, 179, 0.35);
  animation: pulse-subtle 2.5s infinite ease-in-out;
}

@keyframes pulse-subtle {
  0%, 100% {
    transform: scale(1);
    box-shadow: 0 2px 6px rgba(0, 86, 179, 0.35);
  }
  50% {
    transform: scale(1.04);
    box-shadow: 0 0 0 4px rgba(0, 86, 179, 0.2);
  }
}

/* --- STATE: COMPLETED --- */
.timeline-completed .timeline-dot {
  background: var(--clr-text-2);
  border-color: var(--clr-text-2);
}

.timeline-completed .timeline-date {
  color: var(--clr-text-4);
}

.timeline-completed .timeline-title {
  color: var(--clr-text-2);
}

/* --- STATE: CURRENT / ACTIVE / UP NEXT --- */
.timeline-current {
  position: relative;
}

.timeline-current .timeline-dot {
  width: 16px;
  height: 16px;
  background: var(--clr-primary);
  border: 3px solid #ffffff;
  box-shadow: 0 0 0 4px rgba(0, 86, 179, 0.25), 0 0 10px rgba(0, 86, 179, 0.4);
}

.timeline-current .timeline-date {
  color: var(--clr-primary);
  font-weight: 700;
}

.timeline-current .timeline-title {
  color: var(--clr-primary);
  font-weight: 700;
}

/* --- STATE: FUTURE --- */
.timeline-future .timeline-dot {
  background: var(--clr-surface);
  border: 2px solid var(--clr-border-light);
}

.timeline-future .timeline-date {
  color: var(--clr-text-4);
}

.timeline-future .timeline-title {
  color: var(--clr-text-3);
}

/* Mobile Responsive Timeline */
@media (max-width: 640px) {
  .timeline-container {
    padding: var(--space-md) 0;
  }

  .timeline-events::before {
    left: 19px;
  }

  .timeline-item {
    grid-template-columns: 38px 1fr;
    grid-template-areas:
      "node date"
      "node content";
    column-gap: var(--space-xs);
    row-gap: 2px;
  }

  .timeline-node-col {
    grid-area: node;
    justify-content: center;
  }

  .timeline-date-col {
    grid-area: date;
    text-align: left;
    padding-right: 0;
    padding-top: 0;
  }

  .timeline-content-col {
    grid-area: content;
    padding-left: 0;
    padding-bottom: var(--space-xs);
  }
}


/* -- Leaderboard */
.leaderboard-coming {
  padding: var(--space-4xl) var(--space-2xl);
  background: var(--clr-surface);
  border: 2px dashed var(--clr-border);
  border-radius: var(--radius-2xl);
  text-align: center;
}
.leaderboard-coming .lb-icon { font-size: 3rem; margin-bottom: var(--space-lg); opacity: 0.6; }
.leaderboard-coming h3 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--clr-text-2);
  margin-bottom: var(--space-sm);
}
.leaderboard-coming p {
  font-size: 1rem;
  color: var(--clr-text-4);
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.7;
}
.lb-metric-note {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  margin-top: var(--space-xl);
  padding: var(--space-sm) var(--space-lg);
  background: var(--clr-bg-alt);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-pill);
  font-size: 0.875rem;
  color: var(--clr-text-3);
}
/* Future leaderboard table placeholder styles */
#leaderboard-table-wrap { display: none; }
#leaderboard-table { width: 100%; border-collapse: collapse; }
#leaderboard-table th {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--clr-text-3);
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--clr-border);
  text-align: left;
}
#leaderboard-table td {
  padding: var(--space-md) var(--space-lg);
  border-bottom: 1px solid var(--clr-border);
  font-size: 0.9rem;
  color: var(--clr-text-2);
}
#leaderboard-table tr:hover td { background: var(--clr-bg-alt); }

/* -- Conference section */
.conference-card {
  padding: var(--space-2xl) var(--space-3xl);
  display: flex;
  align-items: center;
  gap: var(--space-3xl);
}
.conf-icon {
  font-size: 4rem;
  flex-shrink: 0;
  line-height: 1;
}
.conf-info h3 a {
  color: var(--clr-text-1);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  transition: color var(--transition);
}
.conf-info h3 a:hover {
  color: var(--clr-primary);
  text-decoration: underline;
}
.conf-info .conf-location {
  font-size: 1rem;
  color: var(--clr-primary);
  font-weight: 600;
  margin-bottom: var(--space-md);
}
.conf-info p {
  font-size: 0.9375rem;
  color: var(--clr-text-3);
  max-width: 600px;
  line-height: 1.7;
}

/* -- Footer */
#footer {
  background: var(--clr-bg-alt);
  border-top: 1px solid var(--clr-border);
  padding: var(--space-3xl) 0 var(--space-2xl);
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: 0;
}
.footer-brand .brand-name {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--clr-text-1);
  margin-bottom: var(--space-xs);
}
.footer-brand .brand-subtitle {
  font-size: 0.8125rem;
  color: var(--clr-text-4);
  margin-bottom: var(--space-lg);
  line-height: 1.6;
}
.footer-col h4 {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--clr-text-3);
  margin-bottom: var(--space-lg);
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.footer-links a {
  font-size: 0.875rem;
  color: var(--clr-text-4);
}
.footer-links a:hover { color: var(--clr-text-1); }
.footer-divider {
  height: 1px;
  background: var(--clr-border);
  margin-bottom: var(--space-xl);
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
}
.footer-copyright {
  font-size: 0.8125rem;
  color: var(--clr-text-4);
}
.footer-bottom-links {
  display: flex;
  gap: var(--space-lg);
}
.footer-bottom-links a {
  font-size: 0.8125rem;
  color: var(--clr-text-4);
}
.footer-bottom-links a:hover { color: var(--clr-text-2); }

/* -- Scroll to top */
#scroll-top {
  position: fixed;
  bottom: var(--space-xl);
  right: var(--space-xl);
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  color: var(--clr-text-2);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  z-index: 500;
}
#scroll-top.visible {
  opacity: 1;
  pointer-events: auto;
}
#scroll-top:hover {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
  color: #fff;
}

/* -- Objective list as plain ul */
.objective-list {
  list-style: disc;
  padding-left: var(--space-xl);
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  max-width: 900px;
}
.objective-list li {
  font-size: 0.9375rem;
  color: var(--clr-text-2);
  line-height: 1.65;
}

.objective-highlights-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}

/* -- Organizers */
.organizers-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
  max-width: 1100px;
  margin: 0 auto;
}

.faculty-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
  max-width: 1100px;
  margin: 0 auto;
}

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

.organizer-card {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-xl);
  text-align: center;
}

.organizer-photo {
  display: block;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto var(--space-lg);
}

.organizer-name {
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--clr-primary);
  margin-bottom: var(--space-xs);
  text-decoration: none;
}

.organizer-name:hover {
  text-decoration: underline;
}

.organizer-role {
  display: block;
  font-size: 1rem;
  color: var(--clr-text-3);
  line-height: 1.6;
}

/* -- Responsive */
@media (max-width: 1024px) {
  .nav-links { display: none; }
  .nav-cta   { display: none; }
  .nav-hamburger { display: flex; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .languages-grid { grid-template-columns: repeat(3, 1fr); }
  .metrics-grid { grid-template-columns: 1fr; }
  .footer-top { 
    grid-template-columns: 1fr 1fr; 
    gap: var(--space-2xl) var(--space-xl); 
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
  .volunteers-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .conference-card { flex-direction: column; padding: var(--space-xl); gap: var(--space-xl); }
  .techniques-grid { grid-template-columns: repeat(2, 1fr); }
  .models-grid { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; }
  .submission-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  :root { 
    --space-4xl: 3rem; 
    --space-3xl: 2.5rem;
    --space-2xl: 2rem;
  }
  .container { padding: 0 var(--space-md); }
  .hero-title { font-size: 2.25rem; }
  .hero-subtitle { font-size: 1.125rem; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-md); }
  .languages-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-md); }
  .attacks-grid { grid-template-columns: 1fr; }
  .techniques-grid { grid-template-columns: 1fr; }
  .technique-row { 
    grid-template-columns: 1fr;
    gap: var(--space-xs); 
    padding: var(--space-md) 0;
  }
  .organizers-grid { 
      grid-template-columns: repeat(2, 1fr);
    }
  .volunteers-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .technique-label { 
    font-size: 1rem;
    color: var(--clr-primary);
  }
  .tracks-grid { grid-template-columns: 1fr; }
  .models-grid { grid-template-columns: 1fr; }
  .categories-list { columns: 1; }
  .categories-grid { grid-template-columns: 1fr 1fr; }
  .footer-top { 
    grid-template-columns: 1fr 1fr; 
    gap: var(--space-xl); 
  }
  .footer-brand {
    grid-column: 1 / -1;
    margin-bottom: var(--space-xs);
  }
  .footer-bottom { flex-direction: column; text-align: center; }
  .hero-actions { flex-direction: column; align-items: stretch; width: 100%; }
  .hero-actions .btn { justify-content: center; width: 100%; }
  .objective-highlights-grid { grid-template-columns: 1fr; }
  .organizers-grid { grid-template-columns: repeat(2, 1fr);}
  .dates-table { width: 100%; }
  .dates-event { width: 55%; font-size: 0.875rem; }
  .dates-date { font-size: 0.8125rem; }
  .metrics-grid {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-lg);
  }

  .metric-card {
    flex: 1 1 100%;
    max-width: none;
    width: 100%;
    box-sizing: border-box;
  }

  .metric-formula {width: 100%;box-sizing: border-box;}
  .formula-line {gap: 0.5rem;}
  .formula-fraction { min-width: 0; }
  .formula-fraction span { overflow-wrap: break-word; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 1.85rem; }
  .languages-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr; }
  .categories-grid { grid-template-columns: 1fr; }
  .footer-top { 
    grid-template-columns: 1fr; 
    gap: var(--space-lg); 
  }
  .organizers-grid,
  .volunteers-grid {
    grid-template-columns: 1fr;
  }
  .footer-col {
    padding-top: var(--space-xs);
  }
  .dates-table, .dates-table tbody, .dates-table tr, .dates-table td {
    display: block;
    width: 100%;
  }
  .dates-table tr {
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--clr-border);
  }
  .dates-event {
    padding: 0 0 2px 0;
    font-size: 0.9rem;
  }
  .dates-date {
    padding: 0;
    text-align: left;
    font-size: 0.8125rem;
  }
}

@media (max-width: 1000px) {
  .score-card {
    flex-basis: calc((100% - var(--space-xl)) / 2);
  }
}

@media (max-width: 600px) {
  .scoring-grid {
    gap: var(--space-md);
  }

  .score-card {
    flex-basis: 100%;
    max-width: none;
  }
}

/* -- Intersection observer reveal */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* -- Focus styles for a11y */
:focus-visible {
  outline: 2px solid var(--clr-primary);
  outline-offset: 2px;
}

/* -- Code mono formatting */
code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  color: var(--clr-primary);
  background: rgba(0,86,179,0.05);
  padding: 1px 5px;
  border-radius: 3px;
}

#about .section-header {
  margin-bottom: 0;
}

#about .section-label {
  margin-bottom: var(--space-xl);
}

#about .about-prose {
  margin-top: 0 !important;
}

/* ============================================================
   MOBILE RESPONSIVENESS FIXES
   ============================================================ */

/* Tablets and smaller laptops */
@media (max-width: 1024px) {

  /* Fix About section */
  .about-layout {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  /* Faculty */
  .faculty-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Prevent cards/content from overflowing */
  .container {
    width: 100%;
    max-width: 100%;
  }

  /* Conference */
  .conference-card {
    width: 100%;
  }
}


/* ============================================================
   MOBILE — 768px and below
   ============================================================ */

@media (max-width: 768px) {

  /* ---------- GLOBAL ---------- */

  html {
    overflow-x: hidden;
  }

  body {
    width: 100%;
    overflow-x: hidden;
  }

  .container {
    width: 100%;
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .section {
    padding-top: 2.5rem;
    padding-bottom: 2.5rem;
  }

  .section-header {
    margin-bottom: 1.5rem;
  }

  .section-title {
    font-size: clamp(1.5rem, 7vw, 2rem) !important;
    line-height: 1.2;
  }

  .section-subtitle {
    font-size: 0.95rem;
    line-height: 1.65;
  }


  /* ---------- NAVIGATION ---------- */

  .nav-inner {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  .nav-logo {
    font-size: 0.9rem;
  }

  .nav-hamburger {
    display: flex;
    flex-shrink: 0;
  }

  .nav-mobile {
    left: 0;
    right: 0;
    width: 100%;
    max-height: calc(100vh - var(--nav-height));
    overflow-y: auto;
    padding: 1rem;
  }

  .nav-mobile .nav-link {
    width: 100%;
    padding: 0.75rem 1rem;
  }


  /* ---------- HERO ---------- */

  #hero {
    min-height: auto;
  }

  .hero-inner {
    width: 100%;
    padding: 4rem 0 3rem;
  }

  .hero-title {
    font-size: clamp(2rem, 10vw, 3rem) !important;
    line-height: 1.05;
    word-break: normal;
  }

  .hero-subtitle {
    font-size: 1.05rem;
    line-height: 1.45;
  }

  .hero-desc {
    font-size: 0.95rem;
    line-height: 1.7;
  }

  .hero-actions {
    width: 100%;
    flex-direction: column;
    gap: 0.75rem;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }

  .hero-meta {
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }

  .hero-meta-item {
    width: 100%;
    font-size: 0.82rem;
    line-height: 1.5;
  }


  /* ---------- STATS ---------- */

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
  }

  .stat-card {
    min-width: 0;
    padding: 1.25rem 0.75rem;
  }

  .stat-number {
    font-size: 2rem;
  }

  .stat-label {
    font-size: 0.65rem;
    line-height: 1.4;
  }


  /* ---------- ABOUT ---------- */

  .about-layout {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .about-content {
    width: 100%;
    min-width: 0;
  }

  .about-image {
    width: 100%;
    height: auto;
  }

  .about-image img {
    width: 100%;
    height: auto;
    max-height: 500px;
    object-fit: contain;
  }

  .about-prose p {
    font-size: 0.95rem;
    line-height: 1.7;
  }


  /* ---------- LANGUAGES ---------- */

  .languages-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem;
  }

  .lang-card {
    min-width: 0;
    padding: 1.25rem 0.75rem;
  }

  .lang-name {
    font-size: 0.95rem;
  }

  .lang-native {
    font-size: 1.1rem;
  }


  /* ---------- ATTACK SETTINGS ---------- */

  .attacks-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .attack-card {
    padding: 1.25rem;
  }


  /* ---------- TECHNIQUES ---------- */

  .techniques-list {
    width: 100%;
  }

  .technique-row {
    grid-template-columns: 1fr;
    gap: 0.4rem;
    padding: 1rem 0;
  }

  .technique-label {
    font-size: 1rem;
  }

  .technique-desc {
    font-size: 0.9rem;
    line-height: 1.6;
  }


  /* ---------- TIMELINE ---------- */

  .timeline-container {
    width: 100%;
    padding: 1rem 0;
  }

  .timeline-item {
    grid-template-columns: 38px minmax(0, 1fr);
    grid-template-areas:
      "node date"
      "node content";
    column-gap: 0.5rem;
  }

  .timeline-events::before {
    left: 19px;
  }

  .timeline-date-col {
    text-align: left;
    padding: 0;
  }

  .timeline-content-col {
    min-width: 0;
    padding: 0 0 0.75rem;
  }

  .timeline-title {
    font-size: 0.95rem;
    overflow-wrap: anywhere;
  }

  .timeline-desc {
    font-size: 0.82rem;
    line-height: 1.55;
  }

  .timeline-title-wrap {
    align-items: flex-start;
  }


  /* ---------- FACULTY / ORGANIZERS ---------- */

  .faculty-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .organizers-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .volunteers-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .organizer-card {
    padding: 1.25rem;
  }

  .organizer-photo {
    width: 140px;
    height: 140px;
  }

  .organizer-name {
    font-size: 1.1rem;
  }

  .organizer-role {
    font-size: 0.9rem;
  }


  /* ---------- SUBMISSION ---------- */

  .submission-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .submission-column {
    min-width: 0;
  }

  .submission-column .btn {
    width: 100%;
    justify-content: center;
  }


  /* ---------- CONFERENCE ---------- */

  .conference-card {
    flex-direction: column;
    align-items: flex-start;
    padding: 1.5rem;
    gap: 1rem;
  }

  .conf-icon {
    font-size: 3rem;
  }

  .conf-info {
    width: 100%;
    min-width: 0;
  }

  .conf-info p {
    font-size: 0.9rem;
  }


  /* ---------- FOOTER ---------- */

  .footer-top {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 0.75rem;
  }

  .footer-bottom-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.75rem 1rem;
  }


  /* ---------- SCROLL TOP ---------- */

  #scroll-top {
    width: 40px;
    height: 40px;
    right: 1rem;
    bottom: 1rem;
  }
}


/* ============================================================
   VERY SMALL PHONES — 480px and below
   ============================================================ */

@media (max-width: 480px) {

  .container {
    padding-left: 0.875rem;
    padding-right: 0.875rem;
  }

  .hero-inner {
    padding-top: 3rem;
    padding-bottom: 2.5rem;
  }

  .hero-title {
    font-size: 1.9rem !important;
  }

  .hero-desc {
    font-size: 0.9rem;
  }

  .hero-meta-item {
    font-size: 0.78rem;
  }

  .stats-grid {
    grid-template-columns: 1fr;
  }

  .languages-grid {
    grid-template-columns: 1fr;
  }

  .stat-card {
    padding: 1.25rem;
  }

  .lang-card {
    padding: 1.25rem;
  }

  .attack-card {
    padding: 1rem;
  }

  .timeline-title {
    font-size: 0.9rem;
  }

  .timeline-date {
    font-size: 0.75rem;
  }

  .organizer-photo {
    width: 120px;
    height: 120px;
  }

  .organizer-card {
    padding: 1rem;
  }

  .btn--lg {
    padding: 0.7rem 1rem;
    font-size: 0.9rem;
  }
}

@media (max-width: 1024px) {
  .nav-mobile {
    max-height: calc(100dvh - var(--nav-height));
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
}

/* Hamburger animation */
.nav-hamburger span {
  transition: transform 200ms ease, opacity 200ms ease;
}

.nav-hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}