:root {
  --bg: #f6f5f1;
  --surface: #ffffff;
  --ink: #1b1d1f;
  --muted: #6a6f75;
  --line: #e2e0d9;
  --accent: #1f7a5a;
  --accent-ink: #ffffff;
  --warn: #c2410c;
  --bad: #b42318;
  --i-ask: #2563eb;
  --i-instruct: #4f46e5;
  --i-clarify: #0891b2;
  --i-correct: #dc2626;
  --i-retry: #ea580c;
  --i-continue: #a16207;
  --i-ack: #9ca3af;
  --i-context: #7c3aed;
  --i-assistant: #1f7a5a;
  --radius: 14px;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #121416; --surface: #1b1e21; --ink: #e9e7e2; --muted: #9aa1a8; --line: #2c3035;
    --accent: #3fb68b; --accent-ink: #0d1411; --warn: #fb923c; --bad: #f87171;
    --i-ack: #6b7280; --i-assistant: #3fb68b;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #121416; --surface: #1b1e21; --ink: #e9e7e2; --muted: #9aa1a8; --line: #2c3035;
  --accent: #3fb68b; --accent-ink: #0d1411; --warn: #fb923c; --bad: #f87171;
  --i-ack: #6b7280; --i-assistant: #3fb68b;
  color-scheme: dark;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--ink);
  font: 16px/1.55 system-ui, -apple-system, "Segoe UI", "Apple SD Gothic Neo", "Noto Sans KR", sans-serif;
}
a { color: var(--accent); }
main, .top, footer { max-width: 980px; margin: 0 auto; padding: 0 16px; }
.top { display: flex; align-items: center; justify-content: space-between; padding-top: 18px; padding-bottom: 18px; gap: 12px; }
.brand { font-weight: 800; letter-spacing: .04em; text-decoration: none; color: var(--ink); }
.brand span { color: var(--accent); }
nav { display: flex; gap: 14px; align-items: center; }
nav a { color: var(--muted); text-decoration: none; font-size: 15px; }
nav a:hover { color: var(--ink); }

h1 { font-size: clamp(26px, 5vw, 40px); line-height: 1.2; margin: 28px 0 12px; letter-spacing: -.01em; }
h2 { font-size: 24px; margin: 28px 0 8px; }
h3 { font-size: 16px; margin: 0 0 12px; }
.kicker { margin: 28px 0 -16px; font-size: 14px; color: var(--muted); letter-spacing: .02em; }
.kicker b { color: var(--accent); font-weight: 700; }
.lede { font-size: 18px; color: var(--muted); max-width: 720px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

.counter { display: flex; flex-wrap: wrap; gap: 28px; margin: 22px 0 6px; }
.counter b { display: block; font-size: 28px; font-variant-numeric: tabular-nums; }
.counter span { color: var(--muted); font-size: 14px; }

.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin: 20px 0; }
.label { display: block; font-weight: 600; margin-bottom: 8px; }
textarea {
  width: 100%; resize: vertical; min-height: 140px; padding: 12px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--bg); color: var(--ink); font: 14px/1.5 var(--mono);
}
.row { display: flex; flex-wrap: wrap; gap: 12px 20px; align-items: center; margin-top: 12px; }
.row.end { justify-content: flex-end; }
.file input { display: none; }
.file span { display: inline-block; padding: 6px 12px; border: 1px dashed var(--line); border-radius: 8px; cursor: pointer; }
.file em { color: var(--muted); font-size: 13px; }
.check { font-size: 14px; color: var(--muted); display: flex; gap: 8px; align-items: flex-start; }
button {
  background: var(--accent); color: var(--accent-ink); border: 0; border-radius: 10px;
  padding: 10px 18px; font: inherit; font-weight: 600; cursor: pointer;
}
button.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); font-weight: 500; }
button:disabled { opacity: .6; cursor: progress; }
.error { color: var(--bad); margin: 12px 0 0; }

.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); gap: 14px; margin: 18px 0; }
.stat { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.stat .k { color: var(--muted); font-size: 13px; }
.stat .v { font-size: 26px; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat .s { color: var(--muted); font-size: 13px; }
.stat.hero .v { color: var(--accent); font-size: 34px; }

.bar { display: flex; height: 18px; border-radius: 9px; overflow: hidden; background: var(--line); margin: 8px 0 10px; }
.bar > div { height: 100%; }
.legend { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 13px; color: var(--muted); }
.legend i { display: inline-block; width: 10px; height: 10px; border-radius: 3px; margin-right: 6px; vertical-align: -1px; }

.chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip { padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); font-size: 14px; background: var(--bg); }
.chip.main { border-color: var(--accent); color: var(--accent); font-weight: 600; }

pre.prompt { background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 14px; white-space: pre-wrap; font: 14px/1.6 var(--mono); margin: 0 0 10px; }
ol.tips { padding-left: 20px; margin: 0; }
ol.tips li { margin: 8px 0; }

.graph { width: 100%; overflow-x: auto; }
.graph svg { display: block; }
.graph text { fill: var(--muted); font-size: 11px; }
.graph .axis { stroke: var(--line); }
.graph .edge { fill: none; stroke-width: 1.5; opacity: .75; }
.graph .node { stroke: var(--surface); stroke-width: 1.5; }
.graph .node.redundant { stroke: var(--bad); stroke-width: 2.5; stroke-dasharray: 3 2; }
.graph .tlabel { fill: var(--ink); font-size: 12px; }

.actions { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; }
.note { font-size: 13px; color: var(--muted); }
footer { color: var(--muted); font-size: 14px; padding-top: 30px; padding-bottom: 40px; border-top: 1px solid var(--line); margin-top: 40px; }
@media (max-width: 560px) { .top { flex-wrap: wrap; } .stat .v { font-size: 22px; } }

/* static site additions */
.contrib pre.payload { max-height: 260px; overflow: auto; background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 12px; font: 12px/1.5 var(--mono); white-space: pre-wrap; word-break: break-all; }
.contrib .chip button { background: none; border: 0; color: var(--muted); padding: 0 0 0 6px; font: inherit; cursor: pointer; }
.contrib .status { font-size: 14px; color: var(--muted); min-height: 1.4em; }
.contrib .status.ok { color: var(--accent); }
.contrib .status.err { color: var(--bad); }
.privacy-badge { display: inline-flex; gap: 8px; align-items: center; font-size: 13px; color: var(--accent); border: 1px solid var(--accent); border-radius: 999px; padding: 4px 12px; margin-top: 4px; }
.linkbox ol { padding-left: 20px; margin: 8px 0 0; }
.linkbox li { margin: 8px 0; }
.bookmarklet { display: inline-block; padding: 8px 14px; border-radius: 10px; background: var(--accent); color: var(--accent-ink); font-weight: 700; text-decoration: none; cursor: grab; }
.muted-box { background: var(--bg); border: 1px dashed var(--line); border-radius: 10px; padding: 12px 14px; font-size: 14px; color: var(--muted); }