:root {
  color-scheme: dark;
  --background: #000;
  --border: #2a2a2a;
  --foreground: #e0e0e0;
  --muted: #999;
  --subtle: #777;
  --accent: #ebb859;
  --surface: #141414;
  --hover: #222;
  --radius: 8px;
  --font: "Inter", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
}

* {
  box-sizing: border-box;
}

body {
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font);
  line-height: 1.5;
  margin: 0;
}

a {
  color: var(--foreground);
  font-weight: 600;
  text-decoration: none;
}

a:hover {
  color: #fff;
  text-decoration: underline;
}

code {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.92em;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.page {
  margin: 0 auto;
  max-width: 960px;
  padding: 56px 24px;
}

.intro {
  margin-bottom: 32px;
  max-width: 720px;
}

.eyebrow {
  color: var(--accent);
  margin: 0 0 8px;
}

h1,
h2,
p {
  margin-top: 0;
}

h1 {
  font-size: clamp(2.25rem, 4vw, 4rem);
  line-height: 1;
  margin-bottom: 16px;
}

h2 {
  font-size: 1.15rem;
  line-height: 1.2;
  margin-bottom: 6px;
}

.intro p:not(.eyebrow) {
  color: var(--muted);
  font-size: 1rem;
}

.muted {
  color: var(--subtle);
  margin-bottom: 0;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: grid;
  gap: 24px;
  padding: 24px;
}

.prototype-list {
  display: grid;
  gap: 12px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.prototype-list li {
  align-items: start;
  border-top: 1px solid var(--border);
  display: grid;
  gap: 4px;
  padding-top: 12px;
}

.prototype-list li:hover {
  border-top-color: #444;
}

.prototype-list span {
  color: var(--muted);
  font-size: 0.95rem;
}

@media (max-width: 640px) {
  .page {
    padding: 36px 16px;
  }

  .panel {
    padding: 18px;
  }
}