/* ============================================================
   File:    paradigm-core.css
   Project: The Arena Hub Paradigm
   Version: 1.0.0
   Sync:    2026-07-24
   Owner:   The Arena Hub Ltd · Jonathan Baguley
   ============================================================
   Shared design system for every Paradigm/Observatory/Forum page.
   Palette: locked Arena brand constants (Navy #1B263B / Gold #C5A059),
   applied to a light content area per S143 visual-reference decision.
   Do not introduce new brand colours here without a recorded decision
   in ARENA_PARADIGM_ARCHITECTURAL_REVIEW.md.
   ============================================================ */

:root {
  /* Brand — locked, ARENA_TERMINAL_RULES.md Section 8 */
  --navy:        #1B263B;
  --navy-mid:    #243552;
  --navy-light:  #2E4270;
  --gold:        #C5A059;
  --gold-light:  #D4B475;
  --gold-dim:    rgba(197,160,89,0.15);
  --gold-line:   rgba(197,160,89,0.3);

  /* Content area — light, per S143 reference */
  --paper:       #FFFFFF;
  --paper-alt:   #F7F8FA;
  --paper-grey:  #F4F5F7;
  --border:      #E3E6EC;
  --ink:         #1B263B;
  --ink-mid:     #4A5568;
  --ink-soft:    #7A8394;

  /* Semantic — same tints as COMPLIANCE_REGISTRY.gs status colours, kept
     identical on purpose so a regulation's colour never shifts between
     the Compliance page and Paradigm/Observatory */
  --c-green:      #E8F5EE;
  --c-green-ink:  #1E7E4E;
  --c-amber:      #FFF8E7;
  --c-amber-ink:  #9A6B00;
  --c-blue:       #EAF2F8;
  --c-blue-ink:   #1A5A8A;
  --c-red:        #FDEDEC;
  --c-red-ink:    #B23A2E;
  --c-orange:     #FFF1E5;
  --c-orange-ink: #B45E1A;

  /* Layout */
  --sidebar-w: 264px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-card: 0 1px 2px rgba(27,38,59,0.06), 0 1px 8px rgba(27,38,59,0.04);
  --shadow-card-hover: 0 4px 16px rgba(27,38,59,0.10);

  --font-head: 'Rajdhani', sans-serif;
  --font-body: 'Source Sans 3', sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--paper-alt);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-head);
  color: var(--navy);
  font-weight: 700;
  line-height: 1.2;
}

a { color: inherit; text-decoration: none; }

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

/* ── Accessibility: skip link + focus states ─────────────── */
.skip {
  position: absolute; top: -60px; left: 0;
  background: var(--gold); color: var(--navy);
  padding: 10px 18px; font-weight: 600; z-index: 1000;
  border-radius: 0 0 var(--radius-sm) 0;
  transition: top 0.15s;
}
.skip:focus { top: 0; }

:focus-visible {
  outline: 3px solid var(--gold);
  outline-offset: 2px;
}

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

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ── App shell: persistent sidebar + main ────────────────── */
.app-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  background: var(--navy);
  color: #E7EAF0;
  display: flex;
  flex-direction: column;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar-brand {
  padding: 22px 20px 18px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-brand a { display: flex; align-items: center; gap: 10px; }
.sidebar-brand .mark {
  width: 34px; height: 34px; border-radius: 8px;
  background: var(--gold); color: var(--navy);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-head); font-weight: 700; font-size: 18px;
  flex-shrink: 0;
}
.sidebar-brand .name { font-family: var(--font-head); font-size: 15px; font-weight: 700; color: #fff; line-height: 1.2; }
.sidebar-brand .name span { display: block; color: var(--gold); font-size: 13px; }

.sidebar-back {
  padding: 12px 20px;
  font-size: 12px;
  color: rgba(231,234,240,0.6);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.sidebar-back a { display: inline-flex; align-items: center; gap: 6px; }
.sidebar-back a:hover { color: var(--gold-light); }

.sidebar-nav { flex: 1; padding: 14px 12px; }
.sidebar-nav .group-label {
  font-size: 11px; text-transform: uppercase; letter-spacing: 0.6px;
  color: rgba(231,234,240,0.45); padding: 14px 10px 6px;
}
.sidebar-nav a {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 12px; border-radius: var(--radius-sm);
  font-size: 14px; font-weight: 500; color: #C7CEDA;
  margin-bottom: 2px;
}
.sidebar-nav a:hover { background: rgba(255,255,255,0.06); color: #fff; }
.sidebar-nav a.current {
  background: var(--gold-dim);
  color: var(--gold-light);
  font-weight: 600;
}
.sidebar-nav a .ic { width: 18px; height: 18px; flex-shrink: 0; opacity: 0.85; }
.sidebar-nav a .badge {
  margin-left: auto; font-size: 10px; font-weight: 700;
  background: var(--c-green-ink); color: #fff;
  padding: 2px 7px; border-radius: 20px; letter-spacing: 0.4px;
}

.sidebar-foot {
  padding: 18px 20px 22px;
  border-top: 1px solid rgba(255,255,255,0.08);
  font-size: 12.5px; line-height: 1.55; color: rgba(231,234,240,0.75);
}

.main {
  flex: 1;
  min-width: 0;
}

.topbar {
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; padding: 16px 32px;
  background: var(--paper);
  border-bottom: 1px solid var(--border);
}
.topbar .search {
  flex: 1; max-width: 420px; position: relative;
}
.topbar .search input {
  width: 100%; padding: 9px 14px 9px 36px;
  border: 1px solid var(--border); border-radius: 20px;
  font-family: var(--font-body); font-size: 13.5px; background: var(--paper-alt);
}
.topbar .search input:focus { border-color: var(--gold); background: var(--paper); }

.content {
  padding: 32px;
  max-width: 1320px;
}

/* ── Breadcrumb ───────────────────────────────────────────── */
.breadcrumb {
  display: flex; align-items: center; flex-wrap: wrap; gap: 6px;
  font-size: 13px; color: var(--ink-soft); margin-bottom: 20px;
}
.breadcrumb a:hover { color: var(--navy); text-decoration: underline; }
.breadcrumb .sep { opacity: 0.5; }
.breadcrumb .current { color: var(--navy); font-weight: 600; }

/* ── Cards (base — extended per content type in cards.js output) ── */
.card {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  transition: box-shadow 0.15s, transform 0.15s;
}
a.card:hover, .card.interactive:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-1px);
}

.pill {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11.5px; font-weight: 600; letter-spacing: 0.2px;
  padding: 3px 10px; border-radius: 20px;
}
.pill.green  { background: var(--c-green);  color: var(--c-green-ink); }
.pill.amber  { background: var(--c-amber);  color: var(--c-amber-ink); }
.pill.blue   { background: var(--c-blue);   color: var(--c-blue-ink); }
.pill.red    { background: var(--c-red);    color: var(--c-red-ink); }
.pill.orange { background: var(--c-orange); color: var(--c-orange-ink); }
.pill .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; }

.tag {
  display: inline-block; font-size: 11.5px; font-weight: 600;
  color: var(--navy-mid); background: var(--paper-grey);
  border: 1px solid var(--border);
  padding: 3px 9px; border-radius: 20px;
}

.btn {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-body); font-weight: 600; font-size: 13.5px;
  padding: 10px 20px; border-radius: var(--radius-sm);
  border: 1px solid transparent; cursor: pointer;
}
.btn-primary { background: var(--navy); color: var(--gold-light); }
.btn-primary:hover { background: var(--navy-mid); }
.btn-gold { background: var(--gold); color: var(--navy); }
.btn-gold:hover { background: var(--gold-light); }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--navy); }
.btn-ghost:hover { border-color: var(--gold); }
.btn:disabled, .btn.disabled { opacity: 0.5; cursor: not-allowed; }

/* ── Section furniture ────────────────────────────────────── */
.section-head {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: 16px; gap: 16px;
}
.section-head h2 { font-size: 20px; }
.section-head .view-all { font-size: 13px; font-weight: 600; color: var(--navy-mid); }
.section-head .view-all:hover { color: var(--gold); }

.eyebrow {
  font-size: 12px; font-weight: 700; letter-spacing: 0.6px; text-transform: uppercase;
  color: var(--gold); margin-bottom: 6px; display: block;
}

.grid { display: grid; gap: 18px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

/* ── Official-guidance disclaimer strip ──────────────────── */
.authority-note {
  display: flex; align-items: flex-start; gap: 10px;
  background: var(--paper-grey); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 12px 16px;
  font-size: 13px; color: var(--ink-mid); line-height: 1.5;
}
.authority-note .ic { flex-shrink: 0; margin-top: 1px; color: var(--gold); }

/* ── Empty / inert state (used by Forum submissions) ─────── */
.inert-note {
  background: var(--paper-grey); border: 1px dashed var(--border);
  border-radius: var(--radius-sm); padding: 10px 14px;
  font-size: 12.5px; color: var(--ink-soft); margin-top: 10px;
}

/* ── Footer ───────────────────────────────────────────────── */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 22px 32px; margin-top: 40px;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
  font-size: 12.5px; color: var(--ink-soft);
}
.site-footer a:hover { color: var(--navy); text-decoration: underline; }
.site-footer .links { display: flex; gap: 16px; flex-wrap: wrap; }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 980px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 780px) {
  .app-shell { flex-direction: column; }
  .sidebar { position: relative; height: auto; width: 100%; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .content { padding: 20px; }
  .topbar { padding: 14px 20px; flex-wrap: wrap; }
}