/* ================================================================
   protium.css — shared stylesheet for redacted.space
   Single source of truth for all visual tokens.
   ================================================================ */

/* ── Font faces ─────────────────────────────────────────────────── */
@font-face {
  font-family: 'JetBrains Mono';
  src: url('fonts/JetBrainsMono-Regular.woff2') format('woff2');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'JetBrains Mono';
  src: url('fonts/JetBrainsMono-SemiBold.woff2') format('woff2');
  font-weight: 600;
  font-style: normal;
  font-display: swap;
}

/* ── Design tokens (§2) ─────────────────────────────────────────── */
:root {
  /* Base tones (§2.1) */
  --bg: #0d1117;
  --surface: #161b22;
  --border: #272d38;

  /* Text tones (§2.2) */
  --text: #e8ecf1;
  --text-muted: #8b95a3;

  /* Axis colors — semantic only (§2.3) */
  --axis-time: #d6483b;
  --axis-distance: #e0a23b;
  --axis-energy: #3d8bdc;
  --axis-mass: #5b6b7d;

  /* Typography (§2.4) */
  --font-body: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont,
               Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono',
               'Cascadia Code', Consolas, monospace;

  /* Layout */
  --nav-width: 260px;
  --content-max: 780px;
}

/* ── Reset ──────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  line-height: 1.7;
  min-height: 100vh;
}

/* ── Layout: sidebar + main ─────────────────────────────────────── */
.site-layout {
  display: grid;
  grid-template-columns: var(--nav-width) 1fr;
  min-height: 100vh;
}

/* ── Sidebar nav ────────────────────────────────────────────────── */
.site-nav {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  padding: 2rem 1.5rem;
  border-right: 1px solid var(--border);
  background: var(--bg);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.nav-masthead {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.3em;
  color: var(--text-muted);
  text-transform: uppercase;
  text-decoration: none;
  border-bottom: none;
  margin-bottom: 1.5rem;
  display: block;
}
.nav-masthead:hover { color: var(--text); }

/* ── Project header with spin marker ────────────────────────────── */
.nav-project {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1.5rem;
}

.nav-project-name {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--text);
}

/* ── Spin animation (§6.2) — 7.04s per orbit = 1 BLIP ──────────── */
.spin-marker {
  flex-shrink: 0;
}

.spin-electron {
  transform-origin: 14px 14px;
  animation: protium-spin 7.04s linear infinite;
}

@keyframes protium-spin {
  from { transform: rotate(0deg) translateX(8px) rotate(0deg); }
  to   { transform: rotate(360deg) translateX(8px) rotate(-360deg); }
}

/* ── Tier toggles ───────────────────────────────────────────────── */
.nav-tier {
  margin-bottom: 0.125rem;
}

.nav-tier-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.4rem 0;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-body);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  cursor: pointer;
  text-align: left;
}

.nav-tier-toggle:hover { color: var(--text); }
.nav-tier-toggle:focus-visible {
  outline: 2px solid var(--axis-energy);
  outline-offset: 2px;
  border-radius: 2px;
}

.nav-chevron {
  display: inline-block;
  width: 0.45em;
  height: 0.45em;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(-45deg);
  transition: transform 0.15s ease;
  flex-shrink: 0;
}

.nav-tier-toggle[aria-expanded="true"] .nav-chevron {
  transform: rotate(45deg);
}

/* ── Tier page lists ────────────────────────────────────────────── */
.nav-tier-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0.5rem 1.25rem;
  display: none;
}

.nav-tier-toggle[aria-expanded="true"] + .nav-tier-list {
  display: block;
}

.nav-tier-list a {
  display: block;
  padding: 0.25rem 0 0.25rem 0.75rem;
  font-size: 0.78rem;
  color: var(--text-muted);
  text-decoration: none;
  border-bottom: none;
  border-left: 2px solid transparent;
}

.nav-tier-list a:hover {
  color: var(--text);
}

/* Amber left-bar for current page (§6.2) */
.nav-tier-list a[aria-current="page"] {
  color: var(--text);
  border-left-color: var(--axis-distance);
}

/* ── Main content area ──────────────────────────────────────────── */
.site-main {
  padding: 3rem 2.5rem 4rem;
  max-width: calc(var(--content-max) + 5rem);
}

/* ── Page template (§7) ─────────────────────────────────────────── */
.tier-badge {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.35em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.page-h1 {
  font-family: var(--font-body);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: 0.01em;
  margin: 0 0 0.5rem;
}

.purpose-line {
  font-size: 0.9rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  max-width: 60ch;
}

/* ── Prose ──────────────────────────────────────────────────────── */
.prose {
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.7;
  max-width: 65ch;
}

.prose p { margin: 0 0 1rem; }
.prose strong { font-weight: 600; }

.prose code, code {
  font-family: var(--font-mono);
  font-size: 0.85em;
  background: var(--surface);
  padding: 0.15em 0.35em;
  border-radius: 3px;
}

/* ── Links ──────────────────────────────────────────────────────── */
a {
  color: var(--text);
  text-decoration: none;
  border-bottom: 1px solid var(--border);
}

a:hover {
  border-bottom-color: var(--text-muted);
}

/* ── Tables ─────────────────────────────────────────────────────── */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.82rem;
}

th {
  text-align: left;
  color: var(--text-muted);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 400;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  padding: 0 0.75rem 0.6rem 0;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

td {
  color: var(--text);
  padding: 0.5rem 0.75rem 0.5rem 0;
  border-bottom: 1px solid var(--surface);
  vertical-align: top;
}

/* ── Tier footer ────────────────────────────────────────────────── */
.tier-footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--border);
}

.tier-footer-label {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin: 0 0 0.75rem;
}

.tier-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
}

.tier-footer a {
  font-size: 0.78rem;
  color: var(--text-muted);
  border-bottom: 1px solid var(--border);
}

.tier-footer a:hover {
  color: var(--text);
  border-bottom-color: var(--text-muted);
}

/* ── Version stamp ──────────────────────────────────────────────── */
.version-stamp {
  margin-top: 3rem;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.15em;
  color: var(--text-muted);
  opacity: 0.6;
}

/* ── Responsive: collapse sidebar on narrow screens ─────────────── */
@media (max-width: 768px) {
  .site-layout {
    grid-template-columns: 1fr;
  }

  .site-nav {
    position: relative;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 1.25rem 1.5rem;
  }

  .site-main {
    padding: 2rem 1.25rem 3rem;
  }
}

/* ── Reduced motion ─────────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .spin-electron {
    animation: none;
  }
}