:root {
  --paper: #f2eee4;
  --paper-2: #e8e2d4;
  --ink: #17201f;
  --ink-2: #4c5754;
  --ink-3: #8a918c;
  --line: #d3ccbb;
  --water: #1f6f78;
  --water-2: #3fa2a0;
  --water-soft: #d4e6e2;
  --warn: #a2471f;
  --serif: 'Instrument Serif', Georgia, serif;
  --sans: 'Inter Tight', system-ui, sans-serif;
  --mono: 'IBM Plex Mono', ui-monospace, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper: #0f1514;
    --paper-2: #17201f;
    --ink: #e9e5da;
    --ink-2: #aab3ae;
    --ink-3: #6d7772;
    --line: #2a3533;
    --water: #5cc4bd;
    --water-2: #3a9c97;
    --water-soft: #16302e;
    --warn: #e08a5f;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
html, body { margin: 0; overflow-x: clip; }
body {
  background: var(--paper);
  color: var(--ink);
  font: 16px/1.55 var(--sans);
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; }
.mono { font-family: var(--mono); }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
[hidden] { display: none !important; }

button {
  white-space: nowrap;
  font: 500 15px var(--sans);
  background: var(--ink);
  color: var(--paper);
  border: 0;
  border-radius: 999px;
  padding: 11px 20px;
  cursor: pointer;
  transition: transform .15s, opacity .15s;
}
button:hover { transform: translateY(-1px); }
button:disabled { opacity: .45; cursor: default; transform: none; }
button.ghost { background: transparent; color: var(--ink); box-shadow: inset 0 0 0 1px var(--line); }
button.water { background: var(--water); color: #fff; }
input {
  font: inherit;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--line);
  padding: 8px 2px;
  outline: none;
  width: 100%;
}
input:focus { border-color: var(--water); }

.bar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px clamp(16px, 4vw, 48px);
  background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 8px; font: 600 18px var(--mono); text-decoration: none; letter-spacing: -.02em; }
.brand svg { color: var(--water); }
.bar nav { display: flex; align-items: center; gap: 22px; font-size: 14px; }
.bar nav a { text-decoration: none; color: var(--ink-2); }
.bar nav a:hover { color: var(--ink); }
@media (max-width: 640px) { .bar nav a { display: none; } }

/* ---------- hero */
.hero { position: relative; min-height: calc(100vh - 62px); display: grid; align-items: center; padding: 48px clamp(16px, 6vw, 96px); overflow: hidden; }
#river { position: absolute; inset: 0; width: 100%; height: 100%; }
.hero-copy { position: relative; max-width: 580px; }
.kicker { font-size: 12px; letter-spacing: .14em; text-transform: uppercase; color: var(--water); margin: 0 0 18px; }
h1 { font: 400 clamp(46px, 7.4vw, 92px)/.98 var(--serif); letter-spacing: -.02em; margin: 0 0 22px; }
h1 em { color: var(--water); }
.lede { font-size: clamp(17px, 1.6vw, 19px); color: var(--ink-2); max-width: 540px; margin: 0 0 30px; }
.find {
  display: flex; align-items: center; gap: 6px;
  max-width: 520px; padding: 6px 6px 6px 18px;
  background: var(--paper); border: 1px solid var(--ink); border-radius: 999px;
  box-shadow: 0 10px 30px -18px rgba(0,0,0,.35);
}
.find .prefix { color: var(--ink-3); font-size: 15px; white-space: nowrap; }
.find input { border: 0; padding: 8px 0; font-size: 15px; min-width: 0; }
.msg { min-height: 1.5em; font-size: 14px; color: var(--ink-2); margin: 12px 0 0; }
.msg.err { color: var(--warn); }
@media (max-width: 480px) { .find .prefix { display: none; } }

/* ---------- listing */
.listing { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 64px); padding: 56px clamp(16px, 6vw, 96px); border-top: 1px solid var(--line); background: var(--paper-2); }
@media (max-width: 820px) { .listing { grid-template-columns: 1fr; } }
.repo-card { display: grid; grid-template-columns: 64px 1fr; gap: 6px 18px; align-content: start; }
.repo-card img { width: 64px; height: 64px; border-radius: 14px; grid-row: span 2; }
.repo-card .full { font: 500 22px var(--mono); word-break: break-word; }
.repo-card .meta { font: 13px var(--mono); color: var(--ink-3); }
.repo-card .desc { grid-column: 1 / -1; color: var(--ink-2); margin: 10px 0 0; }
.repo-card .note { grid-column: 1 / -1; font-size: 14px; color: var(--water); margin: 4px 0 0; }
.list-form { display: grid; gap: 18px; align-content: start; }
.list-form label { display: grid; gap: 4px; font-size: 13px; color: var(--ink-2); }
.list-form .hint { color: var(--ink-3); }
.list-form .row { display: grid; grid-template-columns: 2fr 1fr; gap: 18px; }
.amount { display: flex; align-items: center; gap: 8px; }
.amount input { font: 500 22px var(--mono); }
.fine { font-size: 13px; color: var(--ink-3); margin: 0; }
.list-form button { justify-self: start; }

/* ---------- river log */
.river-sec, .letter, .fees { padding: 72px clamp(16px, 6vw, 96px); border-top: 1px solid var(--line); }
h2 { font: 400 clamp(34px, 4.6vw, 54px)/1 var(--serif); margin: 0 0 12px; letter-spacing: -.01em; }
.sub { color: var(--ink-2); margin: 0 0 28px; max-width: 640px; }
.log { list-style: none; margin: 0; padding: 0; font-size: 14px; }
.log li { position: relative; padding: 12px 0 12px 34px; border-bottom: 1px dashed var(--line); display: flex; flex-wrap: wrap; gap: 4px 18px; align-items: baseline; }
.log li::before { content: ''; position: absolute; left: 10px; top: 0; bottom: 0; width: 2px; background: var(--water-soft); }
.log li::after { content: ''; position: absolute; left: 5px; top: 17px; width: 12px; height: 12px; border-radius: 50%; background: var(--paper); border: 2px solid var(--water); }
.log li.claimed::after { background: var(--water); }
.log a { font-weight: 600; text-decoration: none; }
.log a:hover { color: var(--water); }
.log .pot { color: var(--water); }
.log .who { color: var(--ink-3); }
.log .empty { color: var(--ink-3); padding-left: 0; border: 0; }
.log .empty::before, .log .empty::after { display: none; }

/* ---------- letter */
.letter { max-width: 760px; font: 400 clamp(19px, 1.7vw, 22px)/1.6 var(--serif); }
.letter h2 { font-style: italic; margin-bottom: 26px; }
.letter p { margin: 0 0 18px; }
.letter mark { background: linear-gradient(transparent 58%, var(--water-soft) 58%); color: inherit; }
.letter .sign { font-style: italic; color: var(--ink-2); }

/* ---------- fees */
.fee-line { font-size: clamp(18px, 1.7vw, 21px); max-width: 760px; margin: 0 0 22px; }
.fee-line .up, .fee-bar .up { color: var(--water); }
.fee-bar { display: flex; max-width: 760px; height: 34px; border-radius: 6px; overflow: hidden; font: 12px/34px var(--mono); margin-bottom: 18px; }
.fee-bar span { padding: 0 10px; background: var(--paper-2); color: var(--ink-2); white-space: nowrap; overflow: hidden; border-right: 1px solid var(--paper); }
.fee-bar span.up { background: var(--water); color: #fff; }

/* ---------- market page */
.mkt { padding: 40px clamp(16px, 6vw, 96px) 72px; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: clamp(24px, 4vw, 64px); }
@media (max-width: 900px) { .mkt { grid-template-columns: 1fr; } }
.mkt .back { grid-column: 1 / -1; font-size: 14px; color: var(--ink-3); text-decoration: none; }
.mkt h1 { font: 500 clamp(26px, 3.4vw, 40px)/1.15 var(--mono); letter-spacing: -.02em; margin: 6px 0 4px; word-break: break-word; }
.mkt .tick { color: var(--ink-3); font: 15px var(--mono); }
.mkt .story { font-size: 18px; color: var(--ink-2); margin: 22px 0; max-width: 620px; }
.mkt .story b { color: var(--ink); font-weight: 600; }
.stream { position: relative; height: 10px; border-radius: 10px; background: var(--paper-2); overflow: hidden; margin: 6px 0 4px; }
.stream i { position: absolute; inset: 0 auto 0 0; background: repeating-linear-gradient(90deg, var(--water) 0 14px, var(--water-2) 14px 28px); background-size: 28px 100%; animation: flow 1.2s linear infinite; border-radius: 10px; }
@keyframes flow { to { background-position: 28px 0; } }
@media (prefers-reduced-motion: reduce) { .stream i { animation: none; } }
.panel { border: 1px solid var(--line); border-radius: 14px; padding: 22px; background: var(--paper); }
.panel + .panel { margin-top: 18px; }
.panel h3 { font: 400 26px var(--serif); margin: 0 0 6px; }
.tabs { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; padding: 3px; margin-bottom: 14px; }
.tabs button { background: transparent; color: var(--ink-2); padding: 7px 16px; font-size: 14px; }
.tabs button[aria-pressed="true"] { background: var(--ink); color: var(--paper); }
.quote { font: 13px var(--mono); color: var(--ink-3); min-height: 1.4em; margin: 8px 0 14px; }
.pot-big { font: 400 clamp(40px, 5vw, 60px)/1 var(--serif); color: var(--water); margin: 8px 0 6px; }
.panel .btns { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
.panel p { margin: 6px 0; color: var(--ink-2); }
.addr { font: 13px var(--mono); color: var(--ink-3); word-break: break-all; }

/* ---------- claim */
.claim-view { padding: 64px clamp(16px, 6vw, 96px); max-width: 760px; }
.claim-view p { font-size: 18px; color: var(--ink-2); }

.foot { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px; padding: 26px clamp(16px, 6vw, 96px); font-size: 12px; color: var(--ink-3); border-top: 1px solid var(--line); }
.toast { position: fixed; left: 50%; bottom: 22px; transform: translateX(-50%); background: var(--ink); color: var(--paper); padding: 12px 18px; border-radius: 12px; font-size: 14px; max-width: min(560px, calc(100vw - 32px)); z-index: 20; box-shadow: 0 12px 30px -12px rgba(0,0,0,.5); }
@media (max-width: 700px) { #river { opacity: .32; } }

/* ---------- richer homepage */
.sec-head { max-width: 720px; }
.river-sec, .follow, .contract, .before, .cta { padding: 80px clamp(16px, 6vw, 96px); border-top: 1px solid var(--line); }
.log-h { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-3); font-weight: 500; margin: 44px 0 4px; }
.log-note { margin-bottom: 14px; max-width: 620px; }
.rising li::after { border-style: dashed; border-color: var(--ink-3); }
.rising li::before { background: repeating-linear-gradient(var(--line) 0 4px, transparent 4px 8px); }
.rising .desc { flex-basis: 100%; color: var(--ink-3); font-family: var(--sans); font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.rising .list-it { margin-left: auto; color: var(--water); text-decoration: none; font-weight: 600; }
.rising .stars { color: var(--ink-3); }

.split { margin: 28px 0 0; }
.split svg { width: 100%; max-width: 980px; height: auto; display: block; overflow: visible; }
.split .flow { fill: none; stroke-width: 3; stroke-linecap: round; stroke-dasharray: 2 12; animation: dash 1.4s linear infinite; }
.split .flow.main { stroke: var(--ink-3); stroke-width: 6; }
.split .flow.pot { stroke: var(--water); stroke-width: 4; }
.split .flow.trib, .split .flow.pons { stroke: var(--ink-3); }
.split .tip { fill: var(--ink-3); }
.split .node { fill: var(--ink); }
.split .pot-node { fill: var(--water); }
.split .big { font: 400 30px var(--serif); fill: var(--ink); }
.split .lbl { font: 500 14px var(--mono); fill: var(--ink-2); }
.split .dim { fill: var(--ink-3); }
.split .up { fill: var(--water); }
@keyframes dash { to { stroke-dashoffset: -28; } }
@media (prefers-reduced-motion: reduce) { .split .flow { animation: none; } }
.split figcaption { margin-top: 26px; }

.code-notes { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr); gap: 18px 40px; margin-top: 30px; max-width: 1100px; align-items: center; }
@media (max-width: 860px) { .code-notes { grid-template-columns: 1fr; } .code-notes .note { margin-bottom: 18px; } }
.code { margin: 0; padding: 16px 18px; background: var(--paper-2); border-left: 3px solid var(--water); border-radius: 0 10px 10px 0; font: 13.5px/1.6 var(--mono); overflow-x: auto; color: var(--ink); }
.code .ln { display: inline; color: var(--ink-3); font-size: 11px; letter-spacing: .08em; text-transform: uppercase; }
.code .k { color: var(--water); }
.note { margin: 0; color: var(--ink-2); font-size: 16px; }
.note b { color: var(--ink); font-weight: 600; }

.before { max-width: 820px; }
.before p { font-size: 18px; color: var(--ink-2); }

.cta { text-align: center; display: grid; justify-items: center; gap: 24px; background: var(--paper-2); }
.cta h2 { font-size: clamp(38px, 5.4vw, 66px); font-style: italic; }
.cta .find { width: 100%; }

.foot { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 28px; padding: 44px clamp(16px, 6vw, 96px); font-size: 13px; color: var(--ink-3); border-top: 1px solid var(--line); }
@media (max-width: 760px) { .foot { grid-template-columns: 1fr 1fr; } .foot-brand { grid-column: 1 / -1; } }
.foot-brand p { margin: 8px 0 0; max-width: 300px; font-size: 14px; }
.foot-brand b { color: var(--ink); font-size: 16px; }
.foot-col { display: grid; gap: 8px; align-content: start; }
.foot-col a { text-decoration: none; color: var(--ink-2); }
.foot-col a:hover { color: var(--water); }
.foot-h { text-transform: uppercase; letter-spacing: .12em; font-size: 11px; color: var(--ink-3); }
.hero { min-height: max(640px, calc(100vh - 62px)); }

/* ---------- opening */
.intro { position: fixed; inset: 0; z-index: 50; background: var(--paper); cursor: pointer; transition: transform .7s cubic-bezier(.7,0,.2,1), opacity .7s; }
.intro canvas { position: absolute; inset: 0; }
.intro-text { position: absolute; left: 0; right: 0; top: calc(36% + 56px); display: grid; justify-items: center; gap: 8px; pointer-events: none; }
.intro-word { background: var(--paper); padding: 0 14px; border-radius: 8px; font: 600 clamp(30px, 5vw, 46px) var(--mono); letter-spacing: -.03em; color: var(--ink); min-height: 1.2em; transition: opacity .2s; }
.intro-tag { background: var(--paper); padding: 0 12px; border-radius: 6px; font: italic 400 clamp(18px, 2.2vw, 24px) var(--serif); color: var(--water); opacity: 0; }
.intro-skip { position: absolute; right: 22px; bottom: 20px; background: transparent; color: var(--ink-3); box-shadow: inset 0 0 0 1px var(--line); font-size: 12px; padding: 8px 14px; }
.intro-out { transform: translateY(-100%); opacity: .6; pointer-events: none; }
html.intro-on, html.intro-on body { overflow: hidden; }
.intro-out ~ .bar, .intro-out ~ main .hero-copy { animation: rise-in .8s .15s both cubic-bezier(.2,.7,.2,1); }
@keyframes rise-in { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: none; } }