:root {
  --bg: #eef1f8;
  --surface: #ffffff;
  --surface-muted: #f8fafc;
  --border: #e2e8f0;
  --border-strong: #cbd5e1;
  --text: #0f172a;
  --text-muted: #64748b;
  --accent: #b7410e;
  --accent-soft: #ffedd5;
  --accent-glow: rgb(183 65 14 / 0.25);
  --js: #d97706;
  --js-soft: #fef3c7;
  --wasm: #b7410e;
  --wasm-soft: #ffedd5;
  --success: #15803d;
  --success-soft: #dcfce7;
  --shadow-md: 0 8px 30px rgb(15 23 42 / 0.07);
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --font-sans:
    "Inter", ui-sans-serif, system-ui, -apple-system, blinkmacsystemfont,
    "Segoe UI", sans-serif;
  --font-mono:
    "JetBrains Mono", ui-monospace, "Cascadia Code", "Segoe UI Mono", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  background: var(--bg);
  background-image:
    radial-gradient(circle at 0% 0%, rgb(183 65 14 / 0.07), transparent 40%),
    radial-gradient(circle at 100% 0%, rgb(217 119 6 / 0.06), transparent 35%);
  color: var(--text);
  font-family: var(--font-sans);
  line-height: 1.5;
  margin: 0;
  min-height: 100vh;
}

code {
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.1rem 0.35rem;
}

.demo {
  display: grid;
  gap: 1.25rem;
  margin: 0 auto;
  max-width: 760px;
  padding: 2.5rem 1.25rem 3.5rem;
}

.hero {
  display: grid;
  gap: 0.75rem;
}

.hero h1,
.hero p {
  margin: 0;
}

.hero h1 {
  font-size: clamp(1.875rem, 4vw, 2.5rem);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.eyebrow {
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.1em;
  margin: 0;
  text-transform: uppercase;
}

.lede {
  color: var(--text-muted);
  max-width: 58ch;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  display: grid;
  gap: 1rem;
  overflow: hidden;
  padding: 1.25rem;
  position: relative;
}

.panel::before {
  background: linear-gradient(90deg, var(--js), var(--wasm));
  content: "";
  height: 3px;
  left: 0;
  position: absolute;
  right: 0;
  top: 0;
}

.panel h2 {
  font-size: 1.125rem;
  letter-spacing: -0.01em;
  margin: 0;
}

.panel p {
  margin: 0;
}

.panel--explain p,
.panel--footnote p {
  color: var(--text-muted);
}

.code-block {
  background: #0f172a;
  border-radius: var(--radius-sm);
  color: #e2e8f0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  line-height: 1.6;
  margin: 0;
  overflow-x: auto;
  padding: 1rem 1.125rem;
}

.code-block code {
  background: none;
  border: 0;
  color: inherit;
  font-size: inherit;
  padding: 0;
}

.note {
  font-size: 0.9375rem;
}

.control-group {
  display: grid;
  gap: 0.55rem;
}

.control-label {
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.workload-picker {
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  display: grid;
  gap: 0.35rem;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  padding: 0.35rem;
}

.workload-option {
  background: transparent;
  border: 0;
  border-radius: calc(var(--radius-md) - 4px);
  color: var(--text-muted);
  cursor: pointer;
  display: grid;
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 700;
  gap: 0.1rem;
  padding: 0.625rem 0.5rem;
  transition:
    background 0.15s ease,
    color 0.15s ease,
    box-shadow 0.15s ease;
}

.workload-option__hint {
  font-size: 0.6875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.workload-option:hover {
  color: var(--text);
}

.workload-option--active {
  background: var(--accent);
  box-shadow: 0 4px 16px var(--accent-glow);
  color: white;
}

.workload-option--active .workload-option__hint {
  color: rgb(255 255 255 / 0.82);
}

.workload-limit {
  color: var(--text-muted);
  font-size: 0.8125rem;
  margin: 0;
}

.module-status {
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 0.875rem;
  margin: 0;
  padding: 0.75rem 0.875rem;
}

.module-status--ready {
  background: var(--success-soft);
  border-color: rgb(21 128 61 / 0.18);
  color: var(--success);
}

.module-status--error {
  background: #fef2f2;
  border-color: #fecaca;
  color: #b91c1c;
}

.run-button {
  background: var(--accent);
  border: 0;
  border-radius: 999px;
  color: white;
  cursor: pointer;
  font: inherit;
  font-size: 0.9375rem;
  font-weight: 700;
  justify-self: start;
  padding: 0.8rem 1.35rem;
  transition:
    background 0.15s ease,
    box-shadow 0.15s ease,
    transform 0.15s ease,
    opacity 0.15s ease;
}

.run-button:hover:not(:disabled) {
  box-shadow: 0 8px 20px var(--accent-glow);
  transform: translateY(-1px);
}

.run-button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.results-header {
  align-items: baseline;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  justify-content: space-between;
}

.run-status {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin: 0;
}

.run-status--running {
  color: var(--accent);
  font-weight: 600;
}

.speedup-card {
  align-items: center;
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  display: grid;
  gap: 0.15rem 0.75rem;
  grid-template-columns: auto 1fr;
  padding: 1rem 1.125rem;
}

.speedup-card__label {
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  grid-column: 1;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.speedup-card__value {
  color: var(--accent);
  font-size: 1.75rem;
  grid-column: 2;
  letter-spacing: -0.02em;
  line-height: 1;
}

.speedup-card__detail {
  color: var(--text-muted);
  font-size: 0.875rem;
  grid-column: 1 / -1;
}

.compare-chart {
  display: grid;
  gap: 1rem;
}

.compare-row {
  display: grid;
  gap: 0.45rem;
}

.compare-row__header {
  align-items: baseline;
  display: flex;
  gap: 0.75rem;
  justify-content: space-between;
}

.compare-row__label {
  font-size: 0.875rem;
  font-weight: 700;
}

.compare-row__label--js {
  color: var(--js);
}

.compare-row__label--wasm {
  color: var(--wasm);
}

.compare-row__time {
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
}

.bar-track {
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: 999px;
  height: 0.75rem;
  overflow: hidden;
}

.bar {
  border-radius: 999px;
  height: 100%;
  min-width: 0.25rem;
  transition: width 0.45s ease;
  width: 0;
}

.bar--js {
  background: linear-gradient(90deg, #f59e0b, var(--js));
}

.bar--wasm {
  background: linear-gradient(90deg, #ea580c, var(--wasm));
}

.result-details {
  background: var(--surface-muted);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: grid;
  gap: 0.75rem;
  margin: 0;
  padding: 1rem;
}

.result-details__item {
  display: grid;
  gap: 0.2rem;
}

.result-details dt {
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.result-details dd {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  margin: 0;
  overflow-wrap: anywhere;
}

.result-details__item--match dd {
  color: var(--success);
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 700;
}

.result-details__item--mismatch dd {
  color: #b91c1c;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 700;
}

.footnote-list {
  color: var(--text-muted);
  display: grid;
  gap: 0.5rem;
  margin: 0;
  padding-left: 1.15rem;
}

.footnote-list li {
  padding-left: 0.15rem;
}

@media (max-width: 640px) {
  .demo {
    gap: 1rem;
    padding: 1rem 0.875rem 1.75rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .panel {
    padding: 1rem;
  }

  .workload-picker {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .speedup-card__value {
    font-size: 1.5rem;
  }
}

@media (max-width: 400px) {
  .workload-picker {
    grid-template-columns: 1fr;
  }
}