:root {
  --cream: #fdf6ec;
  --ink: #1a1a18;
  --muted: #5c584f;
  --sage: #3f6d4e;
  --sage-2: #2f553c;
  --line: rgba(26, 26, 24, 0.08);
  --card: #fffdf8;
  --serif: "Instrument Serif", Georgia, serif;
  --sans: "Bricolage Grotesque", Inter, system-ui, sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.55;
  min-height: 100vh;
}
a { color: var(--sage-2); }
img { max-width: 100%; }
button, textarea, input { font: inherit; }
.wrap { width: min(1080px, calc(100% - 32px)); margin: 0 auto; }

.top {
  position: sticky; top: 0; z-index: 30;
  backdrop-filter: blur(16px);
  background: rgba(253, 246, 236, 0.82);
  border-bottom: 1px solid var(--line);
}
.top-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: inherit; }
.mark {
  width: 36px; height: 36px; border-radius: 999px;
  background: var(--ink); color: var(--cream);
  display: grid; place-items: center; font-weight: 800;
}
.brand strong { display: block; font-size: 16px; letter-spacing: -0.03em; }
.brand span { display: block; font-size: 10px; letter-spacing: 0.16em; text-transform: uppercase; opacity: 0.5; font-weight: 700; }
.live {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid var(--line); background: #fff; border-radius: 999px;
  padding: 6px 12px; font-size: 12px; font-weight: 600;
}
.dot { width: 7px; height: 7px; border-radius: 99px; background: var(--sage); animation: pulse 1.8s infinite; }
@keyframes pulse { 50% { opacity: 0.35; } }

.hero { padding: 56px 0 28px; }
.kicker { font-size: 12px; letter-spacing: 0.18em; text-transform: uppercase; font-weight: 700; color: var(--sage); margin: 0 0 14px; }
h1 {
  font-family: var(--serif);
  font-size: clamp(40px, 7vw, 72px);
  line-height: 0.95;
  font-weight: 400;
  letter-spacing: -0.03em;
  margin: 0 0 16px;
  max-width: 14ch;
}
.lede { max-width: 46ch; color: var(--muted); font-size: 18px; margin: 0 0 28px; }

.board {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 18px;
  box-shadow: 0 20px 50px rgba(26,26,24,0.06);
}
.tabs { display: flex; gap: 8px; margin-bottom: 12px; }
.tab {
  border: 1px solid var(--line); background: transparent; border-radius: 999px;
  padding: 10px 16px; cursor: pointer; font-weight: 600; min-height: 44px;
}
.tab[aria-selected="true"] { background: var(--ink); color: var(--cream); border-color: var(--ink); }
label { display: block; font-size: 13px; font-weight: 600; margin: 8px 0; }
textarea {
  width: 100%; min-height: 140px; resize: vertical;
  border: 1px solid var(--line); border-radius: 16px;
  padding: 14px 16px; background: #fff; color: var(--ink);
}
textarea:focus, .tab:focus-visible, .go:focus-visible { outline: 3px solid rgba(63,109,78,0.35); outline-offset: 2px; }
.row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; justify-content: space-between; margin-top: 12px; }
.hint { color: var(--muted); font-size: 13px; }
.go {
  border: 0; background: var(--sage); color: #fff; cursor: pointer;
  border-radius: 999px; padding: 12px 22px; font-weight: 700; min-height: 44px;
}
.go:hover { background: var(--sage-2); }
.go:disabled { opacity: 0.55; cursor: not-allowed; }

.err {
  display: none; margin-top: 12px; padding: 12px 14px; border-radius: 12px;
  background: #fde8e4; color: #7a2e22; font-size: 14px;
}
.err.show { display: block; }

.result { display: none; padding: 8px 0 64px; }
.result.show { display: block; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 24px 0; }
.panel { background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 20px; }
.panel h2 { font-family: var(--serif); font-size: 28px; margin: 8px 0 12px; font-weight: 400; }
.tag { font-size: 11px; font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; opacity: 0.55; }
.stats { display: flex; gap: 18px; flex-wrap: wrap; margin: 10px 0 0; font-size: 14px; }
.swaps { display: grid; gap: 10px; margin: 20px 0; }
.swap {
  display: grid; grid-template-columns: 1fr auto 1fr; gap: 10px; align-items: center;
  background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 14px;
}
.swap b { display: block; }
.swap small { color: var(--muted); }
.arrow { opacity: 0.4; font-weight: 800; }
.credit {
  background: var(--ink); color: var(--cream); border-radius: 20px; padding: 22px;
}
.credit a { color: #c8e3cf; }
.list { margin: 0; padding-left: 18px; }
.list li { margin: 6px 0; }

.how { padding: 10px 0 80px; }
.how h2 { font-family: var(--serif); font-size: 36px; font-weight: 400; }
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 18px; }
.step { background: #fff; border: 1px solid var(--line); border-radius: 18px; padding: 18px; }
.n { font-weight: 800; color: var(--sage); }

footer {
  border-top: 1px solid var(--line); padding: 28px 0 40px;
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  color: var(--muted); font-size: 13px;
}

@media (max-width: 800px) {
  .split, .steps, .swap { grid-template-columns: 1fr; }
  .arrow { display: none; }
  h1 { max-width: none; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}