:root {
  --bg: #0b0d10;
  --panel: #12161b;
  --panel-2: #171c22;
  --text: #f3f5f7;
  --muted: #a8b0b9;
  --line: #2b333c;
  --accent: #d8b56a;
  --accent-2: #f2d79b;
  --good: #8bc5a5;
  --max: 1180px;
  --radius: 18px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: radial-gradient(circle at 75% 0%, rgba(216,181,106,.08), transparent 34%), var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.55;
}
a { color: inherit; text-decoration: none; }
button, textarea, input { font: inherit; }
button { cursor: pointer; }
.noise {
  position: fixed; inset: 0; pointer-events: none; opacity: .055; z-index: 99;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180' viewBox='0 0 180 180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.82' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.26'/%3E%3C/svg%3E");
}
.shell { width: min(calc(100% - 36px), var(--max)); margin-inline: auto; }
.site-header {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px max(18px, calc((100vw - var(--max))/2));
  border-bottom: 1px solid rgba(255,255,255,.08);
  background: rgba(11,13,16,.84); backdrop-filter: blur(16px);
}
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; letter-spacing: .08em; font-size: .86rem; }
.brand-mark { width: 32px; height: 32px; display:grid; place-items:center; border:1px solid var(--accent); color:var(--accent-2); border-radius: 9px; font-family: Georgia, serif; }
nav { display:flex; gap: 22px; color: var(--muted); font-size: .92rem; }
nav a:hover { color: var(--text); }
.hero { min-height: 760px; display:grid; grid-template-columns: 1.25fr .75fr; gap: 54px; align-items:center; padding: 72px 0 54px; }
.eyebrow { margin:0 0 12px; color:var(--accent); letter-spacing:.15em; font-size:.76rem; font-weight:800; }
h1 { margin:0; font-size: clamp(3.4rem, 7.2vw, 7.25rem); line-height:.92; letter-spacing:-.055em; max-width: 9.8ch; }
h1 span { color: var(--muted); }
.lede { max-width: 760px; margin: 28px 0 0; color:#c6ccd2; font-size: clamp(1.03rem, 1.8vw, 1.28rem); }
.hero-actions { display:flex; gap:12px; flex-wrap:wrap; margin-top: 30px; }
.button { border:1px solid var(--line); border-radius:999px; padding:12px 18px; background:transparent; color:var(--text); font-weight:750; transition:.18s ease; }
.button:hover { transform: translateY(-1px); border-color:#5a6570; }
.button.primary { background:var(--accent); color:#17130c; border-color:var(--accent); }
.button.ghost { background:rgba(255,255,255,.025); }
.button.compact { padding:10px 14px; }
.status-line { display:flex; align-items:center; gap:9px; margin-top:22px; color:var(--muted); font-size:.86rem; }
.status-dot { width:8px; height:8px; border-radius:50%; background:var(--good); box-shadow:0 0 0 5px rgba(139,197,165,.08); }
.hero-panel { border:1px solid var(--line); background:linear-gradient(160deg, rgba(255,255,255,.04), rgba(255,255,255,.015)); border-radius:var(--radius); padding:24px; box-shadow:0 28px 80px rgba(0,0,0,.28); }
.panel-label { color:var(--muted); font-size:.72rem; letter-spacing:.13em; font-weight:800; }
.panel-question { font-family: Georgia, serif; font-size:2rem; line-height:1.14; margin:14px 0 24px; }
.signal-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:1px; background:var(--line); border:1px solid var(--line); border-radius:14px; overflow:hidden; }
.signal-grid div { display:flex; gap:12px; align-items:center; padding:16px; background:var(--panel); }
.signal-grid strong { color:var(--accent); font-size:.75rem; }
.signal-grid span { font-weight:700; }
section { padding-block: 86px; }
.section-heading { display:grid; grid-template-columns:.5fr 1.5fr; gap:32px; align-items:start; margin-bottom:34px; }
.section-heading h2, .lab-layout h2 { margin:0; font-size:clamp(2.2rem,4.5vw,4.5rem); line-height:1.02; letter-spacing:-.045em; }
.section-heading.narrow { display:block; max-width:860px; }
.section-heading.narrow p:last-child { color:var(--muted); font-size:1.08rem; max-width:760px; }
.principle-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:14px; }
.principle-card { min-height:230px; border:1px solid var(--line); border-radius:16px; padding:22px; background:rgba(255,255,255,.018); }
.principle-card > span { color:var(--accent); font-weight:800; font-size:.75rem; }
.principle-card h3 { font-size:1.35rem; margin:44px 0 8px; }
.principle-card p { margin:0; color:var(--muted); }
.lab-section { border-block:1px solid var(--line); background:#0e1115; }
.lab-layout { display:grid; grid-template-columns:.9fr 1.1fr; gap:52px; align-items:start; }
.section-copy { color:var(--muted); font-size:1.05rem; max-width:650px; }
.question-bank { display:flex; flex-wrap:wrap; gap:9px; margin-top:24px; }
.question-bank button { border:1px solid var(--line); background:transparent; color:#cbd1d7; border-radius:999px; padding:8px 11px; font-size:.86rem; }
.question-bank button:hover { border-color:var(--accent); color:var(--accent-2); }
.lab-card { background:var(--panel); border:1px solid var(--line); border-radius:var(--radius); padding:18px; box-shadow:0 30px 80px rgba(0,0,0,.2); }
.dropzone { min-height:260px; border:1px dashed #47515c; border-radius:14px; display:grid; place-items:center; text-align:center; background:#0d1014; overflow:hidden; outline:none; }
.dropzone:focus, .dropzone.dragging { border-color:var(--accent); box-shadow:0 0 0 3px rgba(216,181,106,.1); }
#dropPrompt { display:flex; flex-direction:column; gap:7px; align-items:center; color:var(--muted); }
#dropPrompt strong { color:var(--text); }
.drop-icon { width:42px; height:42px; display:grid; place-items:center; border:1px solid var(--line); border-radius:12px; color:var(--accent); font-size:1.35rem; }
#preview { width:100%; height:100%; max-height:420px; object-fit:contain; background:#090b0e; }
.file-meta { color:var(--muted); font-size:.8rem; margin:8px 2px 14px; }
.lab-card label { display:block; font-size:.82rem; font-weight:800; margin:8px 0; }
.lab-card textarea { width:100%; resize:vertical; border:1px solid var(--line); border-radius:12px; background:#0d1014; color:var(--text); padding:12px; outline:none; }
.lab-card textarea:focus { border-color:var(--accent); }
.lab-actions { display:flex; gap:8px; margin-top:12px; }
.packet { margin-top:16px; border:1px solid var(--line); border-radius:12px; background:#0b0e12; overflow:hidden; }
.packet-head { display:flex; justify-content:space-between; padding:10px 12px; border-bottom:1px solid var(--line); font-size:.82rem; }
.packet-head button { background:none; border:0; color:var(--accent-2); }
.packet pre { white-space:pre-wrap; margin:0; padding:12px; color:#cbd1d7; font: .84rem/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; }
.privacy-note { color:#7f8993; font-size:.75rem; margin:10px 2px 0; }
.evidence-ladder { display:grid; grid-template-columns:repeat(4,1fr); border:1px solid var(--line); border-radius:16px; overflow:hidden; }
.evidence-ladder article { padding:22px; min-height:250px; border-right:1px solid var(--line); background:rgba(255,255,255,.015); }
.evidence-ladder article:last-child { border-right:0; }
.evidence-ladder .level { color:var(--accent); font-size:.72rem; font-weight:800; letter-spacing:.12em; }
.evidence-ladder h3 { margin:54px 0 8px; }
.evidence-ladder p { color:var(--muted); margin:0; }
.challenge-card { margin-top:18px; display:grid; grid-template-columns:1fr 1fr; gap:30px; border:1px solid var(--accent); border-radius:16px; padding:26px; background:linear-gradient(120deg, rgba(216,181,106,.075), transparent); }
.challenge-card h3 { font-size:1.8rem; margin:0; line-height:1.15; }
.challenge-card > p { margin:0; color:#c5cbd1; }
.roadmap { list-style:none; padding:0; margin:0; border-top:1px solid var(--line); }
.roadmap li { display:grid; grid-template-columns:150px 1fr; gap:24px; padding:22px 8px; border-bottom:1px solid var(--line); color:var(--muted); }
.roadmap li > span { font-size:.78rem; font-weight:850; letter-spacing:.12em; }
.roadmap li strong { color:var(--text); font-size:1.2rem; }
.roadmap li p { margin:4px 0 0; }
.roadmap li.active > span { color:var(--accent); }
footer { border-top:1px solid var(--line); padding:38px 0 28px; background:#080a0d; }
.footer-grid { display:flex; justify-content:space-between; gap:30px; }
.footer-grid p { color:var(--muted); margin:5px 0 0; }
.footer-links { display:flex; gap:18px; color:var(--muted); }
.riot-note { margin-top:26px; padding-top:20px; border-top:1px solid #20262d; color:#737c85; font-size:.72rem; max-width:980px; }
.legal-page { min-height:70vh; padding-top:80px; }
.legal-page h1 { max-width:none; font-size:clamp(3rem,7vw,6rem); }
.legal-copy { max-width:800px; color:#c4cbd1; }
.legal-copy h2 { color:var(--text); margin-top:34px; }
.legal-copy a { color:var(--accent-2); text-decoration:underline; }

@media (max-width: 900px) {
  nav { display:none; }
  .hero { min-height:auto; grid-template-columns:1fr; padding-top:96px; }
  .hero-panel { max-width:640px; }
  .section-heading, .lab-layout, .challenge-card { grid-template-columns:1fr; }
  .principle-grid { grid-template-columns:repeat(2,1fr); }
  .evidence-ladder { grid-template-columns:repeat(2,1fr); }
  .evidence-ladder article:nth-child(2) { border-right:0; }
  .evidence-ladder article:nth-child(-n+2) { border-bottom:1px solid var(--line); }
}
@media (max-width: 620px) {
  .shell { width:min(calc(100% - 24px), var(--max)); }
  .site-header { padding-inline:12px; }
  h1 { font-size: clamp(3.2rem, 16vw, 5.2rem); }
  section { padding-block:64px; }
  .principle-grid, .evidence-ladder { grid-template-columns:1fr; }
  .evidence-ladder article { border-right:0; border-bottom:1px solid var(--line); }
  .evidence-ladder article:last-child { border-bottom:0; }
  .roadmap li { grid-template-columns:1fr; gap:6px; }
  .footer-grid { flex-direction:column; }
}