/* Redknot site: verdigris and folium, a ribbon knot on a clean ground. */
:root {
  --bg: #faf6f0;
  --card: #ffffff;
  --ink: #221a16;
  --muted: #66574f;
  --accent: #B54A33;
  --accent-amber: #2E4A7D;
  --accent-gradient: linear-gradient(135deg, #B54A33 0%, #2E4A7D 100%);
  --accent-glow: rgba(181, 74, 51, 0.35);
  --line: #e8ddd0;
  --wash: #f6ede4;
  --good: #B54A33;
  --warn: #b5541c;
  --neutral: #5e514a;
  --k-canvas: #FFFFFF; --k-edge: #1C2629; --k-wall: #C2410C; --k-one: #1D8469;
  --k-s0: #B4432A; --k-s1: #1E6A78; --k-s2: #B9852A; --k-s3: #70357A;
  --k-s4: #557634; --k-s5: #3A5795; --k-s6: #B05470; --k-s7: #82633F;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #16120f;
    --card: #211b17;
    --ink: #f4ede6;
    --muted: #bcaea4;
    --accent: #E27A5F;
    --accent-amber: #8FA9DA;
    --accent-gradient: linear-gradient(135deg, #B54A33 0%, #2E4A7D 100%);
    --accent-glow: rgba(226, 122, 95, 0.35);
    --line: #3a302a;
    --wash: #2a211c;
    --good: #E27A5F;
    --warn: #f0a15a;
    --neutral: #bcaea4;
    --k-canvas: #100D0B; --k-edge: #03070A; --k-wall: #F59E6B; --k-one: #34B894;
    --k-s0: #E2714F; --k-s1: #4FB0BF; --k-s2: #E0B04F; --k-s3: #B587BF;
    --k-s4: #8DBA62; --k-s5: #7C9CE0; --k-s6: #E28AA5; --k-s7: #C9A57A;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0;
  padding: 48px 16px 80px;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.6 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}
main { max-width: 900px; margin: 0 auto; }
.hero { text-align: center; margin-bottom: 40px; }
.icon {
  width: 112px; height: 112px; margin: 0 auto 14px; display: block;
  border-radius: 22.5%;
  filter: drop-shadow(0 12px 24px rgba(29, 132, 105, 0.25));
}
h1 { font-size: 34px; margin: 0 0 6px; letter-spacing: -0.4px; }
.tagline { color: var(--muted); margin: 0; font-size: 18px; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 26px 28px;
  margin-bottom: 20px;
}
h2 { font-size: 22px; margin: 0 0 12px; letter-spacing: -0.3px; }
h3 { font-size: 17px; margin: 22px 0 6px; }
p, li { color: var(--ink); }
p.note, li.note { color: var(--muted); }
ul { padding-left: 22px; }
li { margin: 6px 0; }
a { color: var(--accent); }
code { font-size: 0.92em; }
nav.links { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; margin-top: 18px; }
nav.links a {
  text-decoration: none; font-weight: 500;
  border: 1px solid var(--line); background: var(--card);
  padding: 9px 16px; border-radius: 999px;
}
footer { text-align: center; color: var(--muted); font-size: 14px; margin-top: 36px; }
footer a { color: var(--muted); }

/* Interactive temari demo */
.kd-stage {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 24px;
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.08);
}
.kd-stage h2 { margin: 0 0 4px; text-align: center; }
.kd-lead { text-align: center; color: var(--muted); margin: 0 auto 18px; max-width: 560px; }
.kd-grid { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr); gap: 24px; align-items: center; }
@media (max-width: 720px) { .kd-grid { grid-template-columns: minmax(0, 1fr); } .kd-stage { padding: 16px; } }
.kd-box { background: var(--k-canvas); border: 1px solid var(--line); border-radius: 18px; padding: 6px; }
#temariCanvas { display: block; margin: 0 auto; touch-action: none; cursor: grab; border-radius: 14px; }
#temariCanvas:active { cursor: grabbing; }
#temariCanvas:focus-visible { outline: 3px solid var(--accent-amber); outline-offset: 2px; }
.td-box { display: flex; justify-content: center; }
.td-count { font-size: 30px; }
#knotCanvas { display: block; touch-action: manipulation; cursor: pointer; border-radius: 14px; -webkit-tap-highlight-color: transparent; }
#knotCanvas svg { display: block; }
#knotCanvas:focus-visible { outline: 3px solid var(--accent-amber); outline-offset: 2px; }
.kd-panel { display: flex; flex-direction: column; gap: 14px; min-width: 0; }
.kd-verdict {
  border-radius: 16px; padding: 12px 16px;
  border: 1px solid var(--line); border-left: 6px solid var(--accent);
  background: var(--wash);
}
.kd-count { font-size: 40px; font-weight: 800; line-height: 1.1; letter-spacing: -1px; color: var(--accent); font-variant-numeric: tabular-nums; }
.kd-count-label { font-size: 16px; font-weight: 600; margin-left: 4px; }
.kd-sub { color: var(--muted); font-size: 14.5px; margin: 4px 0 0; }
.kd-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.kd-chip {
  font: inherit; font-size: 14px; font-weight: 600; color: var(--ink);
  background: var(--card); border: 1px solid var(--line);
  padding: 9px 16px; min-height: 40px; border-radius: 999px; cursor: pointer;
}
.kd-chip:hover { border-color: var(--accent); }
.kd-chip[aria-pressed="true"] {
  background: var(--accent-gradient); color: #fff; border-color: transparent;
  box-shadow: 0 4px 14px var(--accent-glow);
}
.kd-chip.action { background: color-mix(in srgb, var(--accent) 12%, var(--card)); border-color: color-mix(in srgb, var(--accent) 35%, var(--line)); }
.kd-chip:focus-visible { outline: 3px solid var(--accent-amber); outline-offset: 2px; }
.kd-how { color: var(--muted); font-size: 14.5px; margin: 0; }
.kd-sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }