/* ============================================================
   MODULOR — Shared UI
   One font. One palette. One nav. Used on every library page.
   ============================================================ */

:root {
  --ink: #e0e0e0;
  --ink-bright: #F3F0E8;
  --ink-dim: #888;
  --ink-faint: #555;
  --bg: #222426;
  --bg-card: #282C30;
  --bg-elev: #2E3236;
  --rule: rgba(255,255,255,0.08);
  --rule-bright: rgba(255,255,255,0.18);
  --danger: #A94A3B;
  --teal: #3D7A5A;
  --blue: #5E7485;
  --maxw: 1080px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* ---------- NAV ---------- */
.ui-nav {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(34, 36, 38, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--rule);
}
.ui-nav-inner {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.ui-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
}
.ui-logo img { height: 20px; width: auto; object-fit: contain; filter: invert(1); mix-blend-mode: screen; }
.ui-nav-links { display: flex; gap: 22px; align-items: center; }
.ui-nav-link {
  font-size: 13px;
  color: var(--ink-dim);
  transition: color 0.2s;
}
.ui-nav-link:hover, .ui-nav-link.active { color: var(--ink-bright); }
.ui-nav-cta {
  font-size: 13px;
  font-weight: 500;
  padding: 8px 18px;
  background: rgba(255,255,255,0.1);
  color: var(--ink-bright);
  border: 1px solid var(--rule-bright);
  border-radius: 6px;
  transition: background 0.2s, transform 0.15s;
}
.ui-nav-cta:hover { background: rgba(255,255,255,0.2); transform: translateY(-1px); }

/* ---------- PAGE ---------- */
.ui-page { max-width: var(--maxw); margin: 0 auto; padding: 56px 24px 80px; }
.ui-narrow { max-width: 720px; }
.ui-wide { max-width: 1200px; }

/* ---------- TYPE ---------- */
.ui-eyebrow {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--ink-dim);
  margin-bottom: 14px;
}
.ui-h1 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--ink-bright);
  margin-bottom: 16px;
}
.ui-h2 {
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ink-bright);
  font-weight: 600;
  margin: 56px 0 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--rule);
}
.ui-sub {
  font-size: 16px;
  color: var(--ink-dim);
  max-width: 560px;
}
.ui-lede {
  font-size: 17px;
  color: var(--ink);
  max-width: 620px;
  margin-bottom: 32px;
}

/* ---------- GRID + CARD ---------- */
.ui-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
}
.ui-grid-2 { grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); }

.ui-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--rule);
  padding: 20px 22px;
  border-radius: 4px;
  transition: border-color 0.15s, transform 0.15s, background 0.15s;
  position: relative;
}
.ui-card:hover {
  border-color: var(--rule-bright);
  transform: translateY(-1px);
  background: var(--bg-elev);
}
.ui-card-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink-bright);
  margin-bottom: 6px;
}
.ui-card-path {
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: 11px;
  color: var(--ink-faint);
  margin-bottom: 10px;
}
.ui-card-desc {
  font-size: 13px;
  color: var(--ink-dim);
  line-height: 1.5;
}
.ui-card-tag {
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  color: var(--ink-faint);
}

/* ---------- BUTTONS ---------- */
.ui-btn {
  display: inline-block;
  padding: 12px 22px;
  font-size: 14px;
  font-weight: 500;
  background: rgba(255,255,255,0.1);
  color: var(--ink-bright);
  border: 1px solid var(--rule-bright);
  border-radius: 6px;
  cursor: pointer;
  transition: background 0.2s, transform 0.15s;
}
.ui-btn:hover { background: rgba(255,255,255,0.2); transform: translateY(-1px); }
.ui-btn-primary { background: #F3F0E8; color: #111315; border-color: #F3F0E8; }
.ui-btn-primary:hover { background: #C8C5BC; }

/* ---------- FOOTER ---------- */
.ui-footer {
  max-width: var(--maxw);
  margin: 80px auto 0;
  padding: 24px;
  border-top: 1px solid var(--rule);
  font-size: 11px;
  color: var(--ink-faint);
  display: flex;
  justify-content: space-between;
}
.ui-footer a:hover { color: var(--ink); }

/* ---------- FORM ---------- */
.ui-field { margin-bottom: 22px; }
.ui-label {
  display: block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.10em;
  color: var(--ink-dim);
  font-weight: 500;
  margin-bottom: 8px;
}
.ui-label .req { color: var(--danger); margin-left: 4px; }
.ui-input, .ui-select, .ui-textarea {
  width: 100%;
  font-family: inherit;
  font-size: 14px;
  padding: 11px 14px;
  background: var(--bg-card);
  color: var(--ink);
  border: 1px solid var(--rule);
  border-radius: 4px;
  transition: border-color 0.15s;
}
.ui-input:focus, .ui-select:focus, .ui-textarea:focus {
  outline: none;
  border-color: rgba(255,255,255,0.35);
}
.ui-textarea { min-height: 90px; resize: vertical; }
.ui-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.ui-radio-group { display: flex; flex-wrap: wrap; gap: 8px; }
.ui-radio-group label {
  flex: 0 0 auto;
  font-size: 13px;
  color: var(--ink);
  padding: 9px 14px;
  border: 1px solid var(--rule);
  border-radius: 4px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.ui-radio-group label:hover { border-color: var(--rule-bright); }
.ui-radio-group input { margin-right: 6px; accent-color: #fff; }

/* ---------- UTILITY ---------- */
.ui-hr { border: none; border-top: 1px solid var(--rule); margin: 32px 0; }
.ui-muted { color: var(--ink-dim); }
.ui-small { font-size: 12px; }
.ui-mono { font-family: 'SF Mono', Menlo, Consolas, monospace; }

@media (max-width: 640px) {
  .ui-h1 { font-size: 28px; }
  .ui-row { grid-template-columns: 1fr; }
  .ui-nav-inner { padding: 14px 18px; }
  .ui-nav-links { gap: 14px; }
  .ui-nav-links .hide-mobile { display: none; }
}