:root {
  --bg: #101614;
  --bg-2: #18211e;
  --ink: #14201c;
  --paper: #f6f1e7;
  --paper-2: #fffaf3;
  --muted: #5d675f;
  --line: #ddd4c6;
  --gold: #c9862a;
  --gold-deep: #8d5a12;
  --teal: #1f6a5c;
  --danger: #8d2b2b;
  --text: #f4efe6;
  --text-dim: #c9c2b4;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "Segoe UI", "Avenir Next", "Trebuchet MS", sans-serif;
  background:
    radial-gradient(900px 420px at 10% -10%, #24352f 0%, transparent 60%),
    var(--bg);
  color: var(--text);
  line-height: 1.55;
  min-height: 100vh;
}
a { color: #f0c27a; }
a:hover { color: #ffe1a8; }
.sheet a, .panel a, .notice a, .card a, .lane a { color: var(--teal); font-weight: 650; }
.sheet a:hover, .panel a:hover, .notice a:hover, .card a:hover, .lane a:hover { color: #15483e; }
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem 6vw;
  border-bottom: 1px solid rgba(240, 194, 122, 0.18);
  background: rgba(16, 22, 20, 0.9);
  position: sticky;
  top: 0;
  z-index: 2;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--text);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  font-size: 0.82rem;
}
.mark {
  width: 1.7rem;
  height: 1.7rem;
  border-radius: 50%;
  background: conic-gradient(from 120deg, var(--gold), #f3d7a1, var(--teal), var(--gold));
  box-shadow: inset 0 0 0 4px #101614;
}
nav { display: flex; gap: 0.8rem; align-items: center; }
nav a { text-decoration: none; font-size: 0.95rem; }
nav .btn { margin-top: 0; }
.inline { display: inline; margin: 0; }
.nav-btn, button.nav-btn {
  margin: 0;
  padding: 0.35rem 0.7rem;
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(244, 239, 230, 0.35);
}
main { padding: 2rem 6vw 4rem; max-width: 1080px; }
.kicker {
  color: var(--gold);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  font-size: 0.75rem;
  font-weight: 700;
  margin: 0 0 0.6rem;
}
.sheet .kicker, .panel .kicker, .notice .kicker, .card .kicker { color: var(--gold-deep); }
h1 {
  font-family: Palatino, "Palatino Linotype", Georgia, serif;
  font-weight: 600;
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  line-height: 1.05;
  margin: 0 0 0.8rem;
}
h2, h3 { font-family: Palatino, Georgia, serif; font-weight: 600; }
h2 { font-size: 1.7rem; margin: 0 0 0.4rem; }
h3 { margin: 0 0 0.35rem; }
.lede { max-width: 40rem; color: var(--text-dim); font-size: 1.08rem; }
.hero { display: grid; grid-template-columns: 1.4fr 0.8fr; gap: 1.5rem; align-items: end; margin-bottom: 1.5rem; }
.badge {
  display: inline-block;
  background: #3a2a12;
  color: #f6d7a2;
  border: 1px solid #c9862a;
  padding: 0.35rem 0.6rem;
  border-radius: 999px;
  font-size: 0.82rem;
  margin-bottom: 0.8rem;
}
.notice, .card, form.panel, .sheet {
  background: var(--paper);
  color: var(--ink);
  padding: 1.25rem 1.4rem;
  margin: 1rem 0;
  border-radius: 16px;
}
.notice { border-top: 6px solid var(--gold); }
.notice h2, .card h2, form.panel h2 { margin-top: 0; }
.grid { display: grid; gap: 1rem; grid-template-columns: repeat(3, 1fr); }
.card { min-height: 100%; }
.card .num {
  font-family: Palatino, Georgia, serif;
  font-size: 1.8rem;
  color: var(--gold-deep);
  margin: 0;
}
.steps { list-style: none; margin: 0.6rem 0 0; padding: 0; counter-reset: step; }
.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 2.2rem 1fr;
  gap: 0.8rem;
  padding: 0.75rem 0;
  border-top: 1px solid var(--line);
}
.steps li::before {
  content: counter(step);
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  background: var(--ink);
  color: var(--paper);
  display: grid;
  place-items: center;
  font-weight: 700;
}
code, .mono {
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.92em;
  background: #efe7da;
  padding: 0.05rem 0.3rem;
  border-radius: 4px;
}
label { display: block; font-size: 0.82rem; font-weight: 650; margin: 0.75rem 0 0.25rem; color: var(--muted); letter-spacing: 0.03em; text-transform: uppercase; }
input, button, textarea { font: inherit; }
input[type="text"], input[type="email"], input[type="password"], input[type="tel"], input[type="file"] {
  width: 100%;
  padding: 0.7rem 0.75rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--paper-2);
  color: var(--ink);
}
button, .btn {
  display: inline-block;
  margin-top: 0.9rem;
  background: var(--ink);
  color: var(--paper);
  border: 0;
  border-radius: 999px;
  padding: 0.65rem 1.1rem;
  cursor: pointer;
  text-decoration: none;
  font-weight: 650;
}
button.secondary { background: var(--teal); }
button.danger { background: var(--danger); }
.btn.gold { background: var(--gold-deep); color: #fff8ee; }
.muted { color: var(--muted); font-size: 0.95rem; }
.dim { color: var(--text-dim); }
.error {
  background: #f8e4e4;
  color: var(--danger);
  font-weight: 650;
  padding: 0.7rem 0.8rem;
  border-radius: 10px;
}
.track { display: flex; justify-content: space-between; gap: 1rem; align-items: center; padding: 0.65rem 0; border-top: 1px solid var(--line); }
.code { font-variant-numeric: tabular-nums; letter-spacing: 0.08em; font-size: 1.35rem; font-weight: 700; }
.split { display: grid; gap: 1rem; grid-template-columns: 1fr 1fr; margin-top: 1rem; }
.lane { background: #fff; border-radius: 12px; padding: 0.9rem; border: 1px solid var(--line); }
.recorder { background: #f3eee4; border-radius: 12px; padding: 0.8rem; margin: 0.5rem 0 1rem; }
.keypad { display: grid; grid-template-columns: repeat(3, 4.4rem); gap: 0.45rem; margin: 1rem 0; }
.keypad button { margin: 0; width: 4.4rem; height: 3.1rem; border-radius: 12px; background: #24312c; }
.phone-shell { max-width: 28rem; }
.prompt {
  min-height: 5rem;
  background: #0e1412;
  color: #f4efe6;
  padding: 1rem 1.1rem;
  border-radius: 14px;
  font-size: 1.05rem;
}
audio { width: 100%; margin-top: 1rem; }
table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
td, th { text-align: left; padding: 0.45rem 0.4rem; border-bottom: 1px solid var(--line); }
.check { display: flex; gap: 0.6rem; align-items: flex-start; margin: 0.8rem 0; text-transform: none; font-weight: 500; letter-spacing: 0; color: var(--ink); }
.check input { margin-top: 0.3rem; }
.auth { max-width: 32rem; }
.who { color: var(--text-dim); margin-top: 0; }
@media (max-width: 800px) {
  .hero, .grid, .split { grid-template-columns: 1fr; }
  .topbar { align-items: flex-start; }
  main { padding: 1.4rem 1rem 3rem; }
}