/* SUDigger showcase — Athena DNA: indigo/slate, rounded-2xl, soft shadows,
   generous whitespace, never pure black. */

:root {
  --indigo-600: #4f46e5;
  --indigo-500: #6366f1;
  --indigo-100: #e0e7ff;
  --indigo-50: #eef2ff;
  --slate-900: #0f172a;
  --slate-700: #334155;
  --slate-500: #64748b;
  --slate-200: #e2e8f0;
  --slate-100: #f1f5f9;
  --slate-50: #f8fafc;
  --card-shadow: 0 1px 3px rgba(15, 23, 42, .06), 0 8px 24px rgba(15, 23, 42, .05);
  --radius: 18px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  color: var(--slate-900);
  background: var(--slate-50);
  line-height: 1.6;
}
a { color: var(--indigo-600); text-decoration: none; }
a:hover { text-decoration: underline; }
h2 { font-size: 30px; letter-spacing: -.02em; margin: 0 0 8px; }
h3 { font-size: 17px; margin: 0 0 10px; }
.section-sub { color: var(--slate-500); max-width: 720px; margin: 0 0 28px; }
section { max-width: 1080px; margin: 0 auto; padding: 72px 24px 8px; }
.card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  padding: 24px 28px;
}

/* ------------------------------------------------------------- hero */
.hero {
  background:
    radial-gradient(1100px 500px at 80% -10%, rgba(99, 102, 241, .18), transparent 60%),
    radial-gradient(800px 420px at 10% 0%, rgba(79, 70, 229, .12), transparent 55%),
    var(--slate-900);
  color: #fff;
  padding-bottom: 84px;
}
nav {
  max-width: 1080px; margin: 0 auto;
  display: flex; justify-content: space-between; align-items: center;
  padding: 22px 24px;
}
.wordmark { font-weight: 800; font-size: 20px; letter-spacing: -.02em; }
.wordmark span { color: var(--indigo-500); }
.nav-links { display: flex; gap: 22px; font-size: 14px; }
.nav-links a { color: #cbd5e1; }
.nav-links a:hover { color: #fff; text-decoration: none; }
.nav-links .gh { color: #fff; font-weight: 600; }
.hero-inner { max-width: 1080px; margin: 0 auto; padding: 64px 24px 0; }
.hero h1 { font-size: 44px; line-height: 1.15; letter-spacing: -.025em; margin: 0 0 18px; }
.hero h1 em { font-style: normal; color: var(--indigo-500); }
.hero-sub { color: #cbd5e1; max-width: 760px; font-size: 17px; margin: 0 0 40px; }
.hero-sub strong { color: #fff; }
.stat-strip {
  display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px;
}
.stat {
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: 14px;
  padding: 14px 20px;
  min-width: 150px;
}
.stat-n { display: block; font-size: 28px; font-weight: 800; color: #fff; font-variant-numeric: tabular-nums; }
.stat-l { font-size: 12.5px; color: #94a3b8; }
.hero-ctas { display: flex; gap: 14px; }
.btn {
  display: inline-block;
  border-radius: 12px;
  padding: 11px 22px;
  font-size: 14.5px; font-weight: 600;
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(148, 163, 184, .35);
  color: #e2e8f0;
}
.btn:hover { text-decoration: none; background: rgba(255, 255, 255, .14); }
.btn.primary { background: var(--indigo-600); border-color: var(--indigo-600); color: #fff; }
.btn.primary:hover { background: var(--indigo-500); }
main .btn { background: #fff; border: 1px solid var(--slate-200); color: var(--slate-700); box-shadow: var(--card-shadow); }
main .btn:hover { border-color: var(--indigo-500); color: var(--indigo-600); }

/* ------------------------------------------------------------- receipts */
.lead-chart { display: flex; flex-direction: column; gap: 10px; margin-bottom: 26px; }
.lead-row { display: grid; grid-template-columns: 150px 1fr 88px; align-items: center; gap: 14px; }
.lead-name { font-weight: 600; font-size: 14.5px; white-space: nowrap; }
.lead-track { background: var(--slate-100); border-radius: 99px; height: 26px; overflow: hidden; }
.lead-bar {
  height: 100%; width: 0;
  background: linear-gradient(90deg, var(--indigo-500), var(--indigo-600));
  border-radius: 99px;
  transition: width 1s cubic-bezier(.2, .7, .2, 1);
  display: flex; align-items: center; justify-content: flex-end;
  color: #fff; font-size: 12px; font-weight: 700; padding-right: 10px;
  min-width: 34px;
}
.lead-days { font-size: 13px; color: var(--slate-500); }
.catch-cards { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }
.catch {
  background: #fff; border-radius: var(--radius); box-shadow: var(--card-shadow);
  padding: 18px 20px; font-size: 14px;
}
.catch-head { display: flex; align-items: baseline; gap: 8px; margin-bottom: 6px; }
.catch-head strong { font-size: 16px; }
.badge {
  margin-left: auto;
  background: var(--indigo-50); color: var(--indigo-600);
  font-weight: 700; font-size: 12.5px;
  border-radius: 99px; padding: 3px 10px; white-space: nowrap;
}
.badge.unattended { background: #ecfdf5; color: #047857; }
.catch-dates { color: var(--slate-500); font-size: 13px; margin-bottom: 6px; }
.catch-how { color: var(--slate-700); }
.catch-links { margin-top: 8px; font-size: 13px; }
.catch-links a { margin-right: 10px; }
.callout {
  margin-top: 26px;
  background: var(--indigo-50);
  border: 1px solid var(--indigo-100);
  border-radius: var(--radius);
  padding: 20px 24px;
  color: var(--slate-700);
}

/* ------------------------------------------------------------- loop */
.loop-wrap { display: grid; grid-template-columns: 340px 1fr; gap: 20px; align-items: start; }
.loop-steps { display: flex; flex-direction: column; gap: 8px; }
.loop-step {
  display: flex; gap: 12px; align-items: center;
  background: #fff; border: 1.5px solid var(--slate-200);
  border-radius: 14px; padding: 12px 16px;
  cursor: pointer; transition: border-color .25s, background .25s;
  font-size: 14.5px;
}
.loop-step .n {
  width: 26px; height: 26px; border-radius: 8px; flex: none;
  background: var(--slate-100); color: var(--slate-500);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px;
}
.loop-step.active { border-color: var(--indigo-500); background: var(--indigo-50); }
.loop-step.active .n { background: var(--indigo-600); color: #fff; }
.loop-detail { min-height: 300px; }
.loop-detail h3 { color: var(--indigo-600); }
.loop-detail .prod { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--slate-100); color: var(--slate-500); font-size: 14px; }
.loop-detail .prod strong { color: var(--slate-700); }

/* ------------------------------------------------------------- economics */
.econ-grid { display: grid; grid-template-columns: 1.4fr 1fr; gap: 20px; }
.bar-row { display: grid; grid-template-columns: 210px 1fr 56px; gap: 12px; align-items: center; margin-bottom: 14px; font-size: 14px; }
.bar-label { color: var(--slate-500); text-align: right; }
.bar-track { background: var(--slate-100); border-radius: 99px; height: 22px; }
.bar { height: 100%; width: 0; border-radius: 99px; transition: width 1.1s cubic-bezier(.2, .7, .2, 1); }
.bar.full { background: #cbd5e1; }
.bar.signal { background: linear-gradient(90deg, var(--indigo-500), var(--indigo-600)); }
.bar-val { font-weight: 700; font-size: 13.5px; }
.econ-note { color: var(--slate-500); font-size: 13.5px; margin: 14px 0 0; }
.seat-compare { display: flex; flex-direction: column; gap: 18px; }
.seat-price { display: block; font-size: 30px; font-weight: 800; letter-spacing: -.02em; }
.seat-price.accent { color: var(--indigo-600); }
.seat-label { color: var(--slate-500); font-size: 13.5px; }

/* ------------------------------------------------------------- demo */
.demo-card { padding: 0; overflow: hidden; }
.demo-controls {
  display: flex; flex-wrap: wrap; gap: 14px; align-items: center;
  padding: 16px 20px; border-bottom: 1px solid var(--slate-100);
}
.tabs { display: flex; background: var(--slate-100); border-radius: 10px; padding: 3px; }
.tab {
  border: 0; background: transparent; border-radius: 8px;
  padding: 7px 14px; font-size: 13.5px; font-weight: 600;
  color: var(--slate-500); cursor: pointer; font-family: inherit;
}
.tab.active { background: #fff; color: var(--slate-900); box-shadow: 0 1px 2px rgba(15,23,42,.08); }
.chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  border: 1px solid var(--slate-200); background: #fff;
  border-radius: 99px; padding: 4px 12px;
  font-size: 12.5px; font-weight: 600; color: var(--slate-500);
  cursor: pointer; font-family: inherit;
}
.chip.active { background: var(--indigo-600); border-color: var(--indigo-600); color: #fff; }
.table-wrap { overflow-x: auto; max-height: 520px; overflow-y: auto; }
#demo-table { border-collapse: collapse; width: 100%; font-size: 13.5px; }
#demo-table th {
  position: sticky; top: 0; background: #fff;
  text-align: left; color: var(--slate-500); font-size: 12px;
  text-transform: uppercase; letter-spacing: .04em;
  padding: 10px 14px; border-bottom: 2px solid var(--slate-200);
  white-space: nowrap;
}
#demo-table td { padding: 9px 14px; border-bottom: 1px solid var(--slate-100); vertical-align: top; }
#demo-table td.score { color: var(--indigo-600); font-weight: 700; white-space: nowrap; }
#demo-table td.name { font-weight: 600; white-space: nowrap; }
#demo-table td.dim { color: var(--slate-500); }
#demo-table td.wide { min-width: 320px; }
.demo-foot { padding: 12px 20px; margin: 0; color: var(--slate-500); font-size: 13px; }

/* ------------------------------------------------------------- decisions */
.decision-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(420px, 1fr)); gap: 16px; }
.decision p { margin: 0; color: var(--slate-700); font-size: 14.5px; }

/* ------------------------------------------------------------- engine / terminal */
.terminal { padding: 0; overflow: hidden; background: var(--slate-900); }
.term-bar {
  display: flex; align-items: center; gap: 7px;
  padding: 12px 16px; background: rgba(255, 255, 255, .04);
  border-bottom: 1px solid rgba(255, 255, 255, .07);
}
.term-bar span { width: 11px; height: 11px; border-radius: 50%; background: #334155; }
.term-bar code { margin-left: 10px; color: #94a3b8; font-size: 13px; }
#term-body {
  margin: 0; padding: 18px 20px 22px;
  color: #e2e8f0; font-size: 13px; line-height: 1.55;
  font-family: "SF Mono", ui-monospace, "Cascadia Code", Menlo, monospace;
  white-space: pre; overflow-x: auto; min-height: 300px;
}
#term-body .hl { color: #a5b4fc; font-weight: 700; }
#term-body .ok { color: #6ee7b7; }
#term-body .dim { color: #64748b; }
.engine-links { display: flex; gap: 12px; margin-top: 18px; flex-wrap: wrap; }

/* ------------------------------------------------------------- footer */
footer {
  margin-top: 90px; padding: 48px 24px 56px;
  background: var(--slate-900); color: #94a3b8;
}
.arc { max-width: 1080px; margin: 0 auto 30px; display: flex; gap: 26px; flex-wrap: wrap; }
.arc-item { flex: 1; min-width: 240px; font-size: 14px; }
.arc-date { display: block; color: var(--indigo-500); font-weight: 700; margin-bottom: 4px; }
footer p { max-width: 1080px; margin: 0 auto; font-size: 13.5px; }
footer a { color: #c7d2fe; }

/* ------------------------------------------------------------- responsive */
@media (max-width: 860px) {
  .hero h1 { font-size: 32px; }
  .loop-wrap { grid-template-columns: 1fr; }
  .econ-grid { grid-template-columns: 1fr; }
  .decision-grid { grid-template-columns: 1fr; }
  .bar-row { grid-template-columns: 130px 1fr 50px; }
  .bar-label { font-size: 12px; }
  .lead-row { grid-template-columns: 110px 1fr 80px; }
}