/* Shared styles for paradigm deep-dive pages. Sister files: _atlas-shared.js, individual <paradigm>.html */

:root {
  --paper: #FAF7F0;
  --paper-deep: #F2EDDF;
  --paper-edge: #E8E2D0;
  --ink: #1A1A1A;
  --ink-soft: #2E2E2E;
  --ink-mute: #5C5C5C;
  --ink-faint: #6B6655;
  --hairline: #D9D2C2;
  --hairline-soft: #E5DEC9;

  --cat-1: #A04F33;
  --cat-2: #8A6E1F;
  --cat-3: #5C7A4F;
  --cat-4: #3D5C8C;
  --cat-5: #4A4A4A;
  --cat-6: #7A4A6A;

  --serif: 'Newsreader', 'Noto Serif TC', Georgia, serif;
  --sans: 'Source Sans 3', -apple-system, system-ui, "Segoe UI", "Microsoft JhengHei", sans-serif;
  --mono: 'JetBrains Mono', "SF Mono", Consolas, Menlo, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.55;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

/* ========= Top nav (replaces atlas's heavy header) ========= */
.paradigm-nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: var(--paper);
  border-bottom: 1px solid var(--hairline);
  padding: 12px 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.paradigm-nav .back-link {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
  text-decoration: none;
  border: 1px solid var(--hairline);
  padding: 6px 12px;
  border-radius: 4px;
  transition: all 0.18s ease;
}
.paradigm-nav .back-link:hover {
  background: var(--paper-deep);
  border-color: var(--ink-mute);
  color: var(--ink);
}
.paradigm-nav .breadcrumb {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
}
.paradigm-nav .breadcrumb strong {
  color: var(--ink);
  font-weight: 500;
}
.paradigm-nav .nav-chips {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}
.paradigm-nav .nav-chips .label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-faint);
  margin-right: 4px;
}
.paradigm-nav .nav-chip {
  font-size: 12px;
  padding: 3px 10px;
  background: var(--ink);
  color: var(--paper);
  border-radius: 4px;
  font-weight: 500;
}
.paradigm-nav .nav-empty {
  font-family: var(--serif);
  font-style: italic;
  color: var(--ink-faint);
  font-size: 13px;
}

/* ========= Page header ========= */
.paradigm-head {
  padding: 56px 64px 36px 64px;
  border-bottom: 1px solid var(--hairline);
  background: linear-gradient(180deg, var(--paper-deep) 0%, var(--paper) 100%);
  position: relative;
}
.paradigm-head .cat-stripe {
  width: 32px;
  height: 4px;
  background: currentColor;
  margin-bottom: 14px;
}
.paradigm-head[data-cat="1"] { color: var(--cat-1); }
.paradigm-head[data-cat="2"] { color: var(--cat-2); }
.paradigm-head[data-cat="3"] { color: var(--cat-3); }
.paradigm-head[data-cat="4"] { color: var(--cat-4); }
.paradigm-head[data-cat="5"] { color: var(--cat-5); }
.paradigm-head[data-cat="6"] { color: var(--cat-6); }
.paradigm-head .cat-label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: currentColor;
  margin-bottom: 8px;
  font-weight: 500;
}
.paradigm-head h1 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 56px;
  letter-spacing: -0.02em;
  margin: 0 0 6px 0;
  line-height: 1.05;
  color: var(--ink);
}
.paradigm-head .name-en {
  font-family: var(--serif);
  font-style: italic;
  font-weight: 400;
  font-size: 22px;
  color: var(--ink-mute);
  margin: 0 0 18px 0;
}
.paradigm-head .meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--ink-mute);
  text-transform: uppercase;
  margin-bottom: 22px;
}
.paradigm-head .meta .dot { color: var(--ink-faint); margin: 0 8px; }
.paradigm-head .philosophy {
  font-family: var(--serif);
  font-size: 18px;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 880px;
  margin: 0 0 20px 0;
}
.paradigm-head .actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.btn-primary, .btn-secondary {
  padding: 10px 18px;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.01em;
  cursor: pointer;
  border-radius: 4px;
  border: 1px solid var(--ink);
  transition: all 0.18s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--cat-1); border-color: var(--cat-1); }
.btn-primary.is-in { background: var(--paper); color: var(--ink); }
.btn-primary.is-in:hover { background: var(--cat-1); color: var(--paper); border-color: var(--cat-1); }
.btn-secondary { background: var(--paper); color: var(--ink); }
.btn-secondary:hover { background: var(--paper-edge); }

/* ========= Main + competency layout ========= */
main {
  padding: 0 64px 60px 64px;
  max-width: 1640px;
  margin: 0 auto;
}

.competency {
  padding: 48px 0 32px 0;
  border-bottom: 1px solid var(--hairline-soft);
}
.competency:last-of-type { border-bottom: none; }
.competency-head {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 48px;
  align-items: baseline;
  margin-bottom: 32px;
}
.competency .roman {
  font-family: var(--serif);
  font-style: italic;
  font-size: 42px;
  font-weight: 500;
  color: var(--cat-1);
  letter-spacing: -0.02em;
  line-height: 1;
}
.competency h2 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 32px;
  letter-spacing: -0.01em;
  margin: 0 0 4px 0;
  line-height: 1.1;
}
.competency .competency-en {
  font-family: var(--serif);
  font-style: italic;
  font-size: 17px;
  color: var(--ink-mute);
  margin-bottom: 8px;
}
.competency .course-tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cat-1);
  border: 1px solid var(--cat-1);
  padding: 2px 8px;
  border-radius: 2px;
  margin-bottom: 14px;
}
.competency .competency-desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
  max-width: 620px;
}

.section {
  margin-bottom: 36px;
}
.section h3 {
  font-family: var(--serif);
  font-weight: 500;
  font-size: 22px;
  letter-spacing: -0.01em;
  margin: 0 0 4px 0;
  color: var(--ink);
}
.section .section-en {
  font-family: var(--serif);
  font-style: italic;
  color: var(--ink-mute);
  font-size: 14px;
  margin-bottom: 8px;
}
.section .section-desc {
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-mute);
  max-width: 720px;
  margin-bottom: 18px;
}

/* ========= HC card ========= */
.hc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(360px, 100%), 1fr));
  gap: 16px;
}
.hc-card {
  border: 1px solid var(--hairline);
  background: var(--paper);
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  position: relative;
}
.hc-card[data-source="official"] {
  background: var(--paper-deep);
  border-color: var(--cat-1);
}
.hc-card-head {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
}
.hc-tag {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--cat-1);
  letter-spacing: 0;
}
.hc-meta {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
  display: flex;
  gap: 6px;
  align-items: center;
}
.hc-meta .official-badge {
  background: var(--cat-1);
  color: var(--paper);
  padding: 1px 6px;
  border-radius: 2px;
  font-size: 9px;
  letter-spacing: 0.08em;
}
.hc-name-en {
  font-family: var(--serif);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.35;
  color: var(--ink);
  margin: 0 0 4px 0;
}
.hc-name-zh {
  font-family: var(--serif);
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 12px;
  line-height: 1.5;
}
.hc-definition {
  font-size: 13px;
  line-height: 1.55;
  color: var(--ink-soft);
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--hairline-soft);
}
.hc-applications {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.app-row {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 10px;
  align-items: baseline;
  font-size: 12.5px;
  line-height: 1.5;
}
.app-row .app-label {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-faint);
  padding-top: 1px;
}
.app-row .app-text {
  color: var(--ink-soft);
}
.app-row .app-text.official-example {
  font-family: var(--serif);
  font-style: italic;
  color: var(--ink-mute);
}

/* ========= Provenance + footer ========= */
.provenance {
  margin-top: 48px;
  padding: 22px 26px;
  background: var(--paper-deep);
  border: 1px dashed var(--hairline);
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-mute);
}
.provenance h4 {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink);
  font-weight: 500;
  margin: 0 0 10px 0;
}
.provenance a {
  color: var(--cat-4);
  text-decoration: underline;
}

.page-footer-nav {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid var(--hairline);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}
.page-footer-nav .nav-link {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-mute);
  text-decoration: none;
  padding: 6px 12px;
  border: 1px solid var(--hairline);
  border-radius: 4px;
  transition: all 0.18s ease;
}
.page-footer-nav .nav-link:hover {
  background: var(--paper-deep);
  border-color: var(--ink-mute);
  color: var(--ink);
}
.page-footer-nav .nav-link.disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

@media (max-width: 1100px) {
  .paradigm-head, .paradigm-nav, main { padding-left: 32px; padding-right: 32px; }
  .paradigm-head h1 { font-size: 44px; }
  .competency-head { grid-template-columns: 1fr; gap: 8px; }
  .competency .roman { font-size: 32px; }
}
@media (max-width: 480px) {
  .paradigm-head, .paradigm-nav, main { padding-left: 16px; padding-right: 16px; }
  .paradigm-head { padding-top: 32px; padding-bottom: 24px; }
  .paradigm-head h1 { font-size: 34px; }
}