:root {
  --bg: #faf8f5;
  --bg-elevated: #ffffff;
  --bg-alt: #f2eee8;
  --text: #201d1a;
  --text-muted: #5c564f;
  --border: #e2dcd3;
  --border-strong: #928a7f;
  --accent: #a8481a;
  --accent-ink: #ffffff;
  --focus: #1c6cb0;

  --font-sans: -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;

  --radius: 6px;
  --content-width: 68rem;
  --transition: 160ms ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #17140f;
    --bg-elevated: #1f1b15;
    --bg-alt: #211d17;
    --text: #f2ede4;
    --text-muted: #b3a99a;
    --border: #3a332a;
    --border-strong: #6b6255;
    --accent: #e08744;
    --accent-ink: #17140f;
    --focus: #6cb2f2;
  }
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: var(--accent-ink);
  padding: var(--space-1) var(--space-2);
  z-index: 100;
}
.skip-link:focus {
  left: var(--space-2);
  top: var(--space-2);
}

a { color: var(--accent); text-decoration-thickness: 1.5px; }

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

h1, h2, h3 { line-height: 1.15; font-weight: 650; letter-spacing: -0.01em; }
h1 { font-size: clamp(1.9rem, 4vw + 1rem, 3rem); margin: 0 0 var(--space-2); }
h2 { font-size: clamp(1.4rem, 2vw + 1rem, 1.9rem); margin: 0 0 var(--space-1); }
h3 { font-size: 1.1rem; margin: 0 0 0.4rem; }

.wrap {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--bg-alt);
  padding: 0.1em 0.35em;
  border-radius: 4px;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 92%, transparent);
  backdrop-filter: saturate(140%) blur(6px);
  border-bottom: 1px solid var(--border);
}

.bar {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--space-2) var(--space-3);
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.brand {
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  text-decoration: none;
  margin-right: auto;
}

.primary-nav {
  display: flex;
  gap: var(--space-3);
}
.primary-nav a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  padding: 0.35rem 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}
.primary-nav a:hover,
.primary-nav a:focus-visible {
  color: var(--text);
  border-bottom-color: var(--accent);
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  width: 2.25rem;
  height: 2.25rem;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: var(--text);
  position: relative;
  transition: transform var(--transition);
}
.nav-toggle-bars::before { content: ""; position: absolute; top: -6px; }
.nav-toggle-bars::after { content: ""; position: absolute; top: 6px; }

@media (max-width: 46rem) {
  .nav-toggle { display: flex; }
  .primary-nav {
    position: absolute;
    inset: 100% 0 auto 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border);
    flex-direction: column;
    padding: var(--space-2) var(--space-3);
    gap: var(--space-2);
    display: none;
  }
  .primary-nav.open { display: flex; }
  .primary-nav a { padding: 0.6rem 0; }
}

/* Hero */
.hero {
  padding: var(--space-6) 0 var(--space-5);
  border-bottom: 1px solid var(--border);
}
.kicker {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin: 0 0 var(--space-2);
}
.hero .lede {
  max-width: 40rem;
  color: var(--text-muted);
  font-size: 1.1rem;
}
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.7rem 1.3rem;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition), border-color var(--transition), transform var(--transition);
  min-height: 2.75rem;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--accent);
  color: var(--accent-ink);
}
.btn-primary:hover { filter: brightness(1.06); }
.btn-ghost {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

/* Sections */
.section { padding: var(--space-5) 0; }
.section.alt { background: var(--bg-alt); }
.section-lede { color: var(--text-muted); max-width: 40rem; margin-top: -0.3rem; }

.steps {
  list-style: none;
  margin: var(--space-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(3, 1fr);
}
.steps li {
  border-top: 2px solid var(--border);
  padding-top: var(--space-2);
}
.step-index {
  display: block;
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 0.85rem;
  margin-bottom: 0.3rem;
}
.steps p { color: var(--text-muted); margin: 0; }

@media (max-width: 46rem) {
  .steps { grid-template-columns: 1fr; gap: var(--space-3); }
}

/* Component table */
.table-wrap {
  margin-top: var(--space-3);
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-elevated);
}
table { width: 100%; border-collapse: collapse; min-width: 32rem; }
th, td {
  text-align: left;
  padding: 0.75rem var(--space-2);
  border-bottom: 1px solid var(--border);
  font-size: 0.95rem;
  vertical-align: top;
}
thead th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
tbody tr:last-child td { border-bottom: none; }
.muted { color: var(--text-muted); }

/* Spec form */
.spec-form { margin-top: var(--space-3); max-width: 40rem; }
.spec-form label { display: block; font-weight: 600; margin-bottom: 0.4rem; }
.spec-form textarea {
  width: 100%;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: var(--space-2);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  background: var(--bg-elevated);
  color: var(--text);
  resize: vertical;
}
.spec-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-2);
  flex-wrap: wrap;
}
.status-badge {
  font-size: 0.85rem;
  color: var(--text-muted);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 0.3rem 0.75rem;
}
.status-badge[data-state="ok"] { border-color: var(--accent); color: var(--accent); }

.response {
  margin-top: var(--space-3);
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: var(--space-3);
  font-size: 0.9rem;
  word-break: break-word;
  max-width: 40rem;
}
.response > *:first-child { margin-top: 0; }
.response > *:last-child { margin-bottom: 0; }

.agent-step {
  padding: var(--space-2) 0;
  border-top: 1px solid var(--border);
}
.agent-step:first-child { padding-top: 0; border-top: none; }
.agent-step h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--accent);
  margin: 0 0 0.3rem;
}
.agent-step p { margin: 0.3rem 0; }
.agent-violations {
  margin: 0.4rem 0 0;
  padding-left: 1.1rem;
  color: var(--text-muted);
}
.agent-error {
  color: var(--accent);
  font-weight: 600;
}
.agent-ok {
  color: var(--text);
  font-weight: 600;
}

/* Roadmap */
.roadmap-list {
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.roadmap-list li {
  background: var(--bg-elevated);
  padding: var(--space-2) var(--space-3);
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  gap: var(--space-2);
  align-items: start;
}
.roadmap-list p { margin: 0; color: var(--text-muted); font-size: 0.95rem; }
.tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  text-align: center;
  align-self: start;
}
.done .tag { background: color-mix(in srgb, var(--accent) 18%, transparent); color: var(--accent); }
.planned .tag { background: var(--bg-alt); color: var(--text-muted); border: 1px solid var(--border); }

@media (max-width: 30rem) {
  .roadmap-list li { grid-template-columns: 1fr; }
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: var(--space-3) 0 var(--space-4);
  color: var(--text-muted);
  font-size: 0.9rem;
}