:root {
  color-scheme: light dark;
  --bg: #f4f4f2;
  --ink: #141414;
  --muted: #5e5e5e;
  --line: #d8d8d4;
  --card: #ffffff;
  --swiss: #e10600;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.08);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e0e10;
    --ink: #f4f4f5;
    --muted: #a1a1aa;
    --line: #2c2c31;
    --card: #17171a;
    --shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font: 16px/1.5 ui-sans-serif, system-ui, -apple-system, sans-serif;
  background: var(--bg);
  color: var(--ink);
}
a { color: inherit; }
header {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 28px;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.logo { height: 42px; width: auto; display: block; }
nav { display: flex; gap: 18px; align-items: center; }
nav a { text-decoration: none; color: var(--muted); font-size: 14px; }
.btn {
  border: 0; border-radius: 999px; padding: 10px 16px;
  font: inherit; font-weight: 600; cursor: pointer;
}
.btn.primary { background: var(--ink); color: var(--bg); }
.btn.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn.swiss { background: var(--swiss); color: #fff; }
.hero {
  max-width: 980px; margin: 0 auto; padding: 72px 24px 32px; text-align: center;
}
.kicker {
  letter-spacing: 0.14em; text-transform: uppercase; font-size: 12px; color: var(--muted);
}
h1 { font-size: clamp(36px, 6vw, 68px); line-height: 1.02; margin: 12px 0; letter-spacing: -0.03em; }
.lede { font-size: 18px; color: var(--muted); max-width: 640px; margin: 0 auto 28px; }
.hero-actions { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; }
.stage {
  max-width: 860px; margin: 36px auto 10px; padding: 18px;
  border: 1px solid var(--line); border-radius: 18px; background: var(--card);
  box-shadow: var(--shadow); text-align: left;
}
.stage-top { display: flex; justify-content: space-between; color: var(--muted); font-size: 13px; }
.tokens { margin: 14px 0 0; font: 14px/1.6 ui-monospace, Menlo, monospace; white-space: pre-wrap; }
.tok { color: var(--swiss); font-weight: 700; }
.sweep {
  height: 2px; margin-top: 14px; background: linear-gradient(90deg, transparent, var(--ink), transparent);
  background-size: 40% 100%; background-repeat: no-repeat;
  animation: sweep 2.4s ease-in-out infinite;
}
@keyframes sweep { from { background-position: -40% 0; } to { background-position: 140% 0; } }
section { max-width: 980px; margin: 0 auto; padding: 56px 24px; }
h2 { font-size: 32px; letter-spacing: -0.03em; margin: 0 0 8px; }
.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 22px; }
.card {
  border: 1px solid var(--line); border-radius: 16px; padding: 18px; background: var(--card);
}
.card strong { display: block; margin-bottom: 6px; }
.card p, .fine { color: var(--muted); }
.price { font-size: 28px; margin: 8px 0; }
footer { border-top: 1px solid var(--line); padding: 28px; color: var(--muted); text-align: center; }
.modal, .dash {
  position: fixed; inset: 0; z-index: 40; background: rgba(0,0,0,.45);
  display: grid; place-items: center; padding: 20px;
}
.modal[hidden], .dash[hidden] { display: none !important; }
.sheet {
  width: min(440px, 100%); background: var(--card); color: var(--ink);
  border-radius: 18px; padding: 22px; border: 1px solid var(--line);
}
label { display: block; font-size: 13px; margin: 12px 0 4px; }
input {
  width: 100%; border: 1px solid var(--line); border-radius: 10px;
  padding: 10px 12px; font: inherit; background: var(--bg); color: var(--ink);
}
.err { color: #dc2626; min-height: 1.2em; font-size: 14px; }
.walk {
  width: min(920px, 100%);
  min-height: 420px;
  padding: 36px;
}
.walk h2 { font-size: 40px; }
.walk p { font-size: 18px; }
.steps { display: flex; gap: 8px; margin: 12px 0; }
.steps span { width: 28px; height: 4px; border-radius: 99px; background: var(--line); }
.steps span.on { background: var(--ink); }
@media (max-width: 800px) { .grid { grid-template-columns
...