/* ================================================================
   SANDMAIL THESIS — Stylesheet
   Design System: Outfit + JetBrains Mono, Emerald accent, dark theme
   ================================================================ */

:root {
  --bg: #0c0e12;
  --bg-card: #13161c;
  --bg-card-hover: #181c24;
  --border: #1e2330;
  --border-accent: #2a3040;
  --text: #e4e7ed;
  --text-muted: #8891a4;
  --text-dim: #5a6378;
  --accent: #10b981;
  --accent-dim: #065f46;
  --accent-light: #34d399;
  --danger: #ef4444;
  --warning: #f59e0b;
  --blue: #3b82f6;
  --purple: #8b5cf6;
  --cyan: #06b6d4;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html {
  overflow-x: hidden;
}

body {
  font-family: 'Outfit', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.mono { font-family: 'JetBrains Mono', monospace; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  overflow-x: hidden;
}

/* ================================================================
   NAV
   ================================================================ */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(12,14,18,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transform: translateY(-100%);
  opacity: 0;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1),
              opacity 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

.site-nav.visible {
  transform: translateY(0);
  opacity: 1;
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
}

.nav-brand {
  font-weight: 700;
  font-size: 1rem;
  color: var(--accent-light);
  text-decoration: none;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.15rem;
}

.nav-links a {
  color: var(--text-dim);
  text-decoration: none;
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.35rem 0.65rem;
  border-radius: 6px;
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--accent-light);
  background: rgba(16,185,129,0.06);
}

.nav-links a.active {
  color: var(--accent-light);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  flex-direction: column;
  gap: 4px;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-muted);
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

/* Scroll padding so anchors don't hide behind fixed nav */
html {
  scroll-padding-top: 64px;
  scroll-behavior: smooth;
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 52px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(12,14,18,0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 1.25rem;
    gap: 0;
  }

  .nav-links.open { display: flex; }

  .nav-links a {
    padding: 0.6rem 0.5rem;
    font-size: 0.85rem;
  }

  .nav-toggle { display: flex; }
}

/* ================================================================
   HERO — Split layout, left content / right visual
   ================================================================ */
.hero {
  min-height: 100dvh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: 1fr auto;
  align-content: center;
  gap: 2.5rem 4rem;
  position: relative;
  overflow: hidden;
  padding: 3rem 0;
}

.hero::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 800px;
  height: 800px;
  background: radial-gradient(circle, rgba(16,185,129,0.06) 0%, transparent 65%);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -15%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(6,182,212,0.04) 0%, transparent 65%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  align-self: center;
}

@keyframes hero-fade-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero h1 {
  font-size: clamp(2.4rem, 4.5vw, 3.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.08;
  margin-bottom: 1.25rem;
  opacity: 0;
  transform: translateY(20px);
  animation: hero-fade-in 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.1s forwards;
}

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

.hero-sub {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 520px;
  line-height: 1.7;
  margin-bottom: 0;
  opacity: 0;
  transform: translateY(16px);
  animation: hero-fade-in 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.25s forwards;
}

.hero-stats {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  opacity: 0;
  transform: translateY(16px);
  animation: hero-fade-in 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.4s forwards;
}

.hero-stat {
  background: var(--bg-card);
  padding: 1.25rem;
  text-align: center;
}

.hero-stat .value {
  font-size: 1.8rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  color: var(--accent-light);
}

.hero-stat .label {
  font-size: 0.7rem;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.2rem;
}

/* Hero right visual — ring + stacked model cards */
.hero-visual {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  align-self: center;
  gap: 2rem;
  opacity: 0;
  transform: translateY(24px);
  animation: hero-fade-in 0.8s cubic-bezier(0.16, 1, 0.3, 1) 0.3s forwards;
}

.accuracy-ring {
  position: relative;
  width: 240px;
  height: 240px;
  flex-shrink: 0;
}

.accuracy-ring svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.accuracy-ring .ring-bg {
  fill: none;
  stroke: var(--border);
  stroke-width: 5;
}

.accuracy-ring .ring-fill {
  fill: none;
  stroke: var(--accent);
  stroke-width: 5;
  stroke-linecap: round;
  stroke-dasharray: 704;
  stroke-dashoffset: 704;
  animation: ring-draw 1.8s cubic-bezier(0.16, 1, 0.3, 1) 0.8s forwards;
  filter: drop-shadow(0 0 6px rgba(16,185,129,0.25));
}

@keyframes ring-draw {
  to {
    stroke-dashoffset: 4;
  }
}

.accuracy-center {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.accuracy-number {
  font-family: 'JetBrains Mono', monospace;
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--accent-light);
  letter-spacing: -0.03em;
}

.accuracy-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-dim);
  font-weight: 600;
}

/* Model comparison cards — vertical stack below ring */
.model-cards-stack {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
  max-width: 280px;
}

.model-card-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 0.75rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 0.65rem 1rem;
  opacity: 0;
  transform: translateY(8px);
  animation: hero-fade-in 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.model-card-row:nth-child(1) { animation-delay: 1.2s; }
.model-card-row:nth-child(2) { animation-delay: 1.4s; }
.model-card-row:nth-child(3) { animation-delay: 1.6s; }

.model-card-row.mcr-winner {
  border-color: var(--accent-dim);
  box-shadow: 0 2px 16px rgba(16,185,129,0.06);
}

.mcr-info {
  display: flex;
  flex-direction: column;
}

.mcr-name {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
}

.mcr-detail {
  font-size: 0.65rem;
  color: var(--text-dim);
}

.mcr-score {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.15rem;
  font-weight: 700;
  white-space: nowrap;
}

/* ================================================================
   SECTIONS
   ================================================================ */
section {
  padding: 5rem 0;
  border-top: 1px solid var(--border);
}

.section-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.75rem;
}

h2 {
  font-size: 2.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  margin-top: 2.5rem;
}

p {
  color: var(--text-muted);
  max-width: 75ch;
  margin-bottom: 1rem;
}

.lead {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 70ch;
  margin-bottom: 3rem;
}

/* ================================================================
   CARDS
   ================================================================ */
.card-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  margin: 2rem 0;
}

.card-grid.three { grid-template-columns: 1fr 1fr 1fr; }
.card-grid.single { grid-template-columns: 1fr; }

.card {
  background: var(--bg-card);
  padding: 2rem;
}

.card-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
}

.card-value {
  font-size: 1.8rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
}

.card-detail {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-top: 0.25rem;
}

.green { color: var(--accent-light); }
.red { color: var(--danger); }
.yellow { color: var(--warning); }
.blue { color: var(--blue); }
.dim { color: var(--text-dim); }

/* ================================================================
   EXPANDABLE / COLLAPSIBLE DETAILS
   ================================================================ */
.expandable {
  border: 1px solid var(--border);
  border-radius: 12px;
  margin: 1.5rem 0;
  overflow: hidden;
  transition: border-color 0.2s;
}

.expandable[open] {
  border-color: var(--border-accent);
}

.expandable summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.1rem 1.5rem;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--text);
  background: var(--bg-card);
  list-style: none;
  user-select: none;
  transition: background 0.2s;
}

.expandable summary::-webkit-details-marker { display: none; }

.expandable summary:hover {
  background: var(--bg-card-hover);
}

.expandable summary .expand-arrow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 6px;
  background: rgba(16,185,129,0.1);
  color: var(--accent-light);
  font-size: 0.7rem;
  flex-shrink: 0;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.expandable[open] summary .expand-arrow {
  transform: rotate(90deg);
}

.expandable summary .expand-tag {
  margin-left: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-dim);
  background: rgba(90,99,120,0.15);
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
}

.expand-body {
  padding: 1.25rem 1.5rem 1.5rem;
  border-top: 1px solid var(--border);
  background: var(--bg);
}

.expand-body p {
  font-size: 0.88rem;
  margin-bottom: 0.75rem;
}

.expand-body h4 {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--accent-light);
  margin: 1.25rem 0 0.5rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.expand-body h4:first-child {
  margin-top: 0;
}

.tech-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  margin: 0.5rem 0;
}

.tech-item {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.45rem 0.75rem;
  background: var(--bg-card);
  border-radius: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.tech-item .ti-pct {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.72rem;
  color: var(--text-dim);
  min-width: 32px;
  text-align: right;
  flex-shrink: 0;
}

.tech-item .ti-name {
  font-weight: 500;
  color: var(--text);
}

.tech-item .ti-desc {
  color: var(--text-dim);
  font-size: 0.78rem;
}

.tech-list.single-col {
  grid-template-columns: 1fr;
}

.score-row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.85rem;
}

.score-row:last-child { border-bottom: none; }

.score-name {
  font-weight: 600;
  color: var(--text);
  min-width: 160px;
}

.score-desc {
  color: var(--text-dim);
  font-size: 0.8rem;
}

.score-weight {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  color: var(--accent-light);
  font-size: 0.85rem;
}

@media (max-width: 768px) {
  .tech-list { grid-template-columns: 1fr; }
  .score-row { grid-template-columns: 1fr; gap: 0.2rem; }
  .score-name { min-width: auto; }
}

/* ================================================================
   BENCHMARK TABLE
   ================================================================ */
.bench-table-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 2rem 0;
}

.bench-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
  min-width: 700px;
}

.bench-table th {
  text-align: left;
  padding: 1rem;
  font-weight: 600;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  border-bottom: 1px solid var(--border-accent);
}

.bench-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  color: var(--text-muted);
}

.bench-table tr:hover td {
  background: var(--bg-card);
}

.bench-table .model-name {
  font-weight: 600;
  color: var(--text);
}

.bench-table .winner {
  background: rgba(16,185,129,0.05);
}

.bench-table .winner td {
  color: var(--text);
  border-bottom-color: var(--accent-dim);
}

.bench-table .winner .model-name {
  color: var(--accent-light);
}

.rank {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
}

.rank-1 { background: var(--accent-dim); color: var(--accent-light); }
.rank-2 { background: rgba(59,130,246,0.15); color: var(--blue); }
.rank-3 { background: rgba(245,158,11,0.15); color: var(--warning); }
.rank-4 { background: rgba(239,68,68,0.1); color: var(--danger); }
.rank-5 { background: rgba(239,68,68,0.1); color: var(--danger); }
.rank-6 { background: rgba(90,99,120,0.2); color: var(--text-dim); }

/* ================================================================
   BAR CHART
   ================================================================ */
.bar-chart {
  margin: 2.5rem 0;
}

.bar-row {
  display: grid;
  grid-template-columns: 160px 1fr 80px;
  align-items: center;
  gap: 1rem;
  margin-bottom: 0.6rem;
}

.bar-label {
  font-size: 0.85rem;
  font-weight: 500;
  text-align: right;
  color: var(--text-muted);
}

.bar-track {
  height: 32px;
  background: var(--bg-card);
  border-radius: 6px;
  overflow: hidden;
  position: relative;
}

.bar-fill {
  height: 100%;
  border-radius: 6px;
  transition: width 1s ease;
  position: relative;
}

.bar-value {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.85rem;
  font-weight: 600;
}

/* ================================================================
   CONFUSION MATRIX
   ================================================================ */
.confusion-grid {
  display: grid;
  grid-template-columns: 120px 1fr 1fr;
  grid-template-rows: auto auto auto;
  gap: 2px;
  max-width: 500px;
  margin: 1.5rem 0;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.9rem;
}

.confusion-grid .header {
  padding: 0.75rem;
  text-align: center;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
}

.confusion-grid .row-label {
  padding: 0.75rem;
  display: flex;
  align-items: center;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-dim);
  font-family: 'Outfit', sans-serif;
  font-weight: 600;
}

.confusion-grid .cell {
  padding: 1.25rem;
  text-align: center;
  font-weight: 600;
  font-size: 1.3rem;
  border-radius: 8px;
}

.cell-tp { background: rgba(16,185,129,0.15); color: var(--accent-light); }
.cell-tn { background: rgba(16,185,129,0.1); color: var(--accent); }
.cell-fp { background: rgba(239,68,68,0.1); color: var(--danger); }
.cell-fn { background: rgba(245,158,11,0.1); color: var(--warning); }

/* ================================================================
   PIPELINE DIAGRAM
   ================================================================ */
.pipeline {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 0;
  margin: 3rem 0;
}

.pipeline-step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  text-align: center;
}

.pipeline-step .step-num {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.pipeline-step .step-title {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 0.25rem;
}

.pipeline-step .step-detail {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.pipeline-arrow {
  text-align: center;
  color: var(--text-dim);
  font-size: 1.5rem;
  padding: 0 0.5rem;
}

/* ================================================================
   CODE BLOCK
   ================================================================ */
.code-block {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.8rem;
  line-height: 1.8;
  color: var(--text-muted);
  overflow-x: auto;
  margin: 1.5rem 0;
}

.code-block .kw { color: var(--cyan); }
.code-block .str { color: var(--accent-light); }
.code-block .num { color: var(--warning); }
.code-block .comment { color: var(--text-dim); }

/* ================================================================
   CALLOUT
   ================================================================ */
.callout {
  border-left: 3px solid var(--accent);
  padding: 1.25rem 1.5rem;
  background: rgba(16,185,129,0.04);
  border-radius: 0 12px 12px 0;
  margin: 2rem 0;
}

.callout p { margin-bottom: 0; color: var(--text); }

.callout-warning {
  border-left-color: var(--warning);
  background: rgba(245,158,11,0.04);
}

/* ================================================================
   SVG CHART CONTAINER
   ================================================================ */
.chart-container {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
  margin: 2rem 0;
}

.chart-title {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 1.5rem;
  font-weight: 600;
}

/* ================================================================
   TAG
   ================================================================ */
.tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 6px;
  font-size: 0.75rem;
  font-weight: 600;
  font-family: 'JetBrains Mono', monospace;
}

.tag-green { background: rgba(16,185,129,0.15); color: var(--accent-light); }
.tag-red { background: rgba(239,68,68,0.1); color: var(--danger); }
.tag-blue { background: rgba(59,130,246,0.15); color: var(--blue); }
.tag-yellow { background: rgba(245,158,11,0.15); color: var(--warning); }

/* ================================================================
   DIFFICULTY CHART
   ================================================================ */
.diff-chart {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  margin: 2rem 0;
}

.diff-cell {
  background: var(--bg-card);
  padding: 1rem;
  text-align: center;
}

.diff-cell.diff-header {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  font-weight: 600;
}

.diff-cell .diff-val {
  font-family: 'JetBrains Mono', monospace;
  font-weight: 600;
  font-size: 1.1rem;
}

/* ================================================================
   TRY SANDMAIL BANNER
   ================================================================ */
.try-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem 2.5rem;
}

.try-content {
  flex: 1;
}

.try-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  max-width: 600px;
  margin-bottom: 1rem;
}

.try-limits {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.try-limit-tag {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: 6px;
  background: rgba(245,158,11,0.1);
  color: var(--warning);
}

.try-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: var(--bg);
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  border-radius: 10px;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background 0.2s, transform 0.15s;
}

.try-btn:hover {
  background: var(--accent-light);
}

.try-btn:active {
  transform: scale(0.97);
}

@media (max-width: 768px) {
  .try-banner {
    flex-direction: column;
    align-items: stretch;
    padding: 1.5rem;
  }

  .try-btn {
    text-align: center;
    justify-content: center;
  }
}

/* ================================================================
   SCROLL REVEAL
   ================================================================ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ================================================================
   RESPONSIVE
   ================================================================ */
@media (max-width: 768px) {
  .container { padding: 0 1.25rem; }

  .hero {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    gap: 2rem;
    padding: 3rem 0 2rem;
    min-height: auto;
  }

  .hero h1 { font-size: 1.8rem; }

  .hero-sub { font-size: 0.95rem; }

  .hero-stats {
    grid-column: 1;
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-visual { order: -1; }

  .accuracy-ring { width: 160px; height: 160px; }

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

  .model-cards-stack { max-width: 100%; }

  h2 { font-size: 1.6rem; }
  h3 { font-size: 1.15rem; }

  section { padding: 3rem 0; }

  .card-grid { grid-template-columns: 1fr; }
  .card-grid.three { grid-template-columns: 1fr; }

  .pipeline { grid-template-columns: 1fr; gap: 0.5rem; }
  .pipeline-arrow { transform: rotate(90deg); }

  .bar-row { grid-template-columns: 80px 1fr 55px; gap: 0.5rem; }
  .bar-label { font-size: 0.75rem; }

  .diff-chart { grid-template-columns: repeat(3, 1fr); }

  .confusion-grid {
    max-width: 100%;
    grid-template-columns: 80px 1fr 1fr;
    font-size: 0.8rem;
  }

  .code-block { font-size: 0.7rem; padding: 1rem; }

  .tech-list { grid-template-columns: 1fr; }
  .score-row { grid-template-columns: 1fr; gap: 0.2rem; }
  .score-name { min-width: auto; }

  .try-banner {
    flex-direction: column;
    align-items: stretch;
    padding: 1.5rem;
  }
  .try-btn { text-align: center; justify-content: center; }
}

@media (max-width: 480px) {
  .container { padding: 0 1rem; }

  .hero h1 { font-size: 1.5rem; }

  .hero-stat .value { font-size: 1.4rem; }
  .hero-stat .label { font-size: 0.6rem; }
  .hero-stat { padding: 0.85rem 0.5rem; }

  .bar-row { grid-template-columns: 70px 1fr 45px; }
  .bar-label { font-size: 0.7rem; }
  .bar-value { font-size: 0.75rem; }
}

@media print {
  body { background: white; color: #111; }
  .hero::before, .hero::after { display: none; }
  section { page-break-inside: avoid; }
  .reveal { opacity: 1; transform: none; }
}