:root {
  --bg: #05060a;
  --panel: #0c0f16;
  --panel-2: #12161f;
  --hairline: rgba(255, 255, 255, 0.09);
  --hairline-soft: rgba(255, 255, 255, 0.05);
  --ink: #eef1f6;
  --ink-muted: #a6b0c0;
  --ink-subtle: #6b7688;
  --cyan: #22e3ff;
  --cyan-dim: #0ea5c4;
  --magenta: #d946ef;
  --amber: #ffb454;
  --mono: ui-monospace, "SF Mono", "Cascadia Mono", "Consolas", "Menlo", monospace;
  --sans: -apple-system, "Segoe UI", "Inter", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  padding: clamp(20px, 4vw, 56px) clamp(16px, 5vw, 64px) 64px;
  position: relative;
}

.bg-glow {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(60% 45% at 12% -5%, rgba(34, 227, 255, 0.16), transparent 60%),
    radial-gradient(55% 40% at 100% 0%, rgba(217, 70, 239, 0.14), transparent 60%),
    radial-gradient(80% 60% at 50% 100%, rgba(34, 227, 255, 0.06), transparent 60%),
    var(--bg);
}

.page-header {
  max-width: 900px;
  margin: 0 auto 32px;
}

.brand-mark {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
  background: rgba(34, 227, 255, 0.09);
  border: 1px solid rgba(34, 227, 255, 0.28);
  padding: 5px 10px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.page-header h1 {
  font-size: clamp(28px, 4.4vw, 44px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  color: var(--ink);
}

.lede {
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink-muted);
  max-width: 720px;
  margin: 0;
}

.lede strong { color: var(--ink); }

main {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* ---------- hero fractal card ---------- */

.hero-card {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--hairline);
  border-radius: 18px;
  padding: clamp(12px, 2vw, 20px);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.canvas-wrap {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--hairline-soft);
  background: #000;
  line-height: 0;
}

#fractal {
  display: block;
  width: 100%;
  height: clamp(320px, 58vw, 560px);
  touch-action: none;
  cursor: grab;
}
#fractal:active { cursor: grabbing; }

.hud {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(5, 6, 10, 0.62);
  backdrop-filter: blur(6px);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  padding: 10px 12px;
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.5;
  display: grid;
  gap: 4px;
  pointer-events: none;
  min-width: 128px;
}

.hud-row { display: flex; justify-content: space-between; gap: 14px; }
.hud-k { color: var(--ink-subtle); text-transform: uppercase; letter-spacing: 0.06em; font-size: 10px; align-self: center; }
.hud-v { color: var(--cyan); font-variant-numeric: tabular-nums; }

.hint {
  position: absolute;
  bottom: 10px;
  right: 12px;
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.55);
  background: rgba(5, 6, 10, 0.5);
  padding: 5px 9px;
  border-radius: 999px;
  border: 1px solid var(--hairline-soft);
  pointer-events: none;
  transition: opacity 0.4s ease;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 4px 4px 2px;
}

.btn {
  appearance: none;
  border: 1px solid var(--hairline);
  background: var(--panel-2);
  color: var(--ink);
  font: inherit;
  font-size: 13px;
  font-weight: 600;
  padding: 9px 14px;
  border-radius: 8px;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}
.btn:hover { border-color: rgba(34, 227, 255, 0.4); color: var(--cyan); }
.btn:focus-visible { outline: 2px solid var(--cyan); outline-offset: 2px; }
.btn[aria-pressed="true"] {
  background: rgba(34, 227, 255, 0.14);
  border-color: rgba(34, 227, 255, 0.55);
  color: var(--cyan);
}

.zoom-btns { display: flex; gap: 6px; margin-left: auto; }
.btn-icon { width: 36px; padding: 9px 0; text-align: center; font-size: 16px; }

.slider {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  color: var(--ink-muted);
  font-family: var(--mono);
}
.slider input[type="range"] {
  accent-color: var(--cyan);
  width: 140px;
}
.slider output {
  color: var(--cyan);
  min-width: 3ch;
  text-align: right;
}

/* ---------- benchmark card ---------- */

.bench-card {
  background: linear-gradient(180deg, var(--panel), var(--panel-2));
  border: 1px solid var(--hairline);
  border-radius: 18px;
  padding: clamp(18px, 3vw, 30px);
}

.bench-head h2 {
  margin: 0 0 8px;
  font-size: clamp(19px, 2.4vw, 24px);
  letter-spacing: -0.01em;
}

.bench-head p {
  margin: 0 0 22px;
  color: var(--ink-muted);
  font-size: 14px;
  line-height: 1.6;
  max-width: 760px;
}
.bench-head code {
  font-family: var(--mono);
  font-size: 12.5px;
  background: rgba(255, 255, 255, 0.07);
  padding: 1px 6px;
  border-radius: 5px;
  color: var(--ink);
}

.bench-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.bench-col {
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 18px 20px;
  background: rgba(255, 255, 255, 0.02);
}
.bench-col.wasm { border-color: rgba(34, 227, 255, 0.35); }
.bench-col.js { border-color: rgba(255, 180, 84, 0.3); }

.bench-label {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink-muted);
  margin-bottom: 8px;
}

.bench-number {
  font-family: var(--mono);
  font-size: clamp(30px, 5vw, 46px);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  line-height: 1;
  color: var(--ink);
}
.bench-col.wasm .bench-number { color: var(--cyan); }
.bench-col.js .bench-number { color: var(--amber); }

.bench-unit {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--ink-subtle);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 4px 0 12px;
}

.bench-bar-track {
  height: 8px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  overflow: hidden;
}
.bench-bar {
  height: 100%;
  width: 100%;
  border-radius: 999px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s cubic-bezier(.2,.8,.2,1);
}
.bench-col.wasm .bench-bar { background: linear-gradient(90deg, var(--cyan-dim), var(--cyan)); }
.bench-col.js .bench-bar { background: linear-gradient(90deg, #c98a3a, var(--amber)); }

.bench-foot {
  margin-top: 20px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 20px;
  border-top: 1px solid var(--hairline-soft);
  padding-top: 16px;
}

.speedup {
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--magenta);
}

.bench-meta {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-subtle);
}

.page-footer {
  max-width: 760px;
  margin: 8px auto 0;
  color: var(--ink-subtle);
  font-size: 12.5px;
  line-height: 1.7;
  text-align: center;
}
.page-footer code {
  font-family: var(--mono);
  background: rgba(255, 255, 255, 0.06);
  padding: 1px 6px;
  border-radius: 5px;
}

@media (max-width: 640px) {
  .bench-grid { grid-template-columns: 1fr; }
  .zoom-btns { margin-left: 0; }
  .controls { justify-content: flex-start; }
}