/* ============================================================
   CPLK Architecture Portal — Design System
   Brand: teal #0891b2 · navy #1e3a5f · accent #f97316
   ============================================================ */

:root {
  /* Brand palette */
  --brand: #0891b2;
  --brand-600: #0e7490;
  --brand-700: #155e75;
  --brand-50:  #ecfeff;
  --navy: #1e3a5f;
  --navy-700: #142a47;
  --accent: #f97316;
  --accent-50: #fff7ed;

  /* Neutrals (light theme) */
  --bg: #f5f5f5;
  --bg-elev: #ffffff;
  --bg-soft: #fafafa;
  --ink: #0f172a;
  --ink-2: #334155;
  --muted: #64748b;
  --line: #e5e7eb;
  --line-2: #d1d5db;

  /* Semantic */
  --ok: #16a34a;
  --warn: #d97706;
  --danger: #dc2626;
  --info: #2563eb;

  /* Code */
  --code-bg: #0f172a;
  --code-ink: #e2e8f0;
  --code-line: #1e293b;

  /* Radii / shadow / spacing */
  --r-sm: 6px;
  --r:    10px;
  --r-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(15,23,42,0.04), 0 1px 3px rgba(15,23,42,0.06);
  --shadow:    0 4px 12px rgba(15,23,42,0.06), 0 2px 4px rgba(15,23,42,0.04);
  --shadow-lg: 0 20px 40px rgba(15,23,42,0.08), 0 8px 16px rgba(15,23,42,0.06);

  --max-w: 1180px;
}

/* ---- Reset & base ---- */
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Arial, sans-serif;
  font-size: 15.5px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img, svg { max-width: 100%; display: block; }
a { color: var(--brand-600); text-decoration: none; }
a:hover { color: var(--brand-700); text-decoration: underline; }
code, pre, .mono { font-family: ui-monospace, 'JetBrains Mono', SFMono-Regular, Menlo, Consolas, monospace; }

/* ---- Layout ---- */
.layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  min-height: 100vh;
}
.sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  background: var(--bg-elev);
  border-right: 1px solid var(--line);
  padding: 22px 18px;
  z-index: 10;
}
.sidebar::-webkit-scrollbar { width: 6px; }
.sidebar::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 3px; }

.content {
  padding: 40px clamp(24px, 4vw, 56px) 80px;
  max-width: var(--max-w);
  width: 100%;
}

/* ---- Brand / sidebar ---- */
.brand-block {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 4px;
}
.brand-logo {
  width: 36px; height: 36px;
  border-radius: 9px;
  background: linear-gradient(135deg, var(--brand) 0%, var(--navy) 100%);
  display: grid; place-items: center;
  color: #fff;
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
  box-shadow: var(--shadow-sm);
}
.brand-title {
  font-weight: 800;
  font-size: 1.0rem;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.brand-sub {
  color: var(--muted);
  font-size: 0.78rem;
  margin: 4px 0 18px;
}

.nav h4 {
  margin: 16px 8px 6px;
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  font-weight: 700;
}
.nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  margin: 1px 0;
  border-radius: var(--r-sm);
  color: var(--ink-2);
  font-size: 0.92rem;
  text-decoration: none;
  border-left: 2px solid transparent;
}
.nav a:hover {
  background: var(--bg-soft);
  color: var(--ink);
  text-decoration: none;
}
.nav a.active {
  background: var(--brand-50);
  color: var(--brand-700);
  border-left-color: var(--brand);
  font-weight: 600;
}
.nav a .ico {
  width: 16px; height: 16px;
  display: inline-block;
  opacity: 0.85;
}

/* ---- Page top bar ---- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(245,245,245,0.85);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--line);
  padding: 12px clamp(24px, 4vw, 56px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin: -40px clamp(-24px,-4vw,-56px) 32px;
}
.breadcrumb {
  font-size: 0.85rem;
  color: var(--muted);
}
.breadcrumb a { color: var(--muted); }
.breadcrumb .sep { margin: 0 6px; opacity: 0.5; }
.breadcrumb .cur { color: var(--ink); font-weight: 600; }
.topbar-actions {
  display: flex; gap: 8px; align-items: center;
}
.topbar-actions .pill-link {
  font-size: 0.82rem;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--bg-elev);
}
.topbar-actions .pill-link:hover {
  background: var(--brand-50);
  border-color: var(--brand);
  color: var(--brand-700);
  text-decoration: none;
}

/* ---- Hero ---- */
.hero {
  background:
    radial-gradient(1200px 600px at 100% -10%, rgba(8,145,178,0.10), transparent 55%),
    radial-gradient(800px 400px at -10% 110%, rgba(249,115,22,0.08), transparent 55%),
    linear-gradient(135deg, #ffffff 0%, #fafafa 100%);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow);
  margin-bottom: 28px;
  position: relative;
  overflow: hidden;
}
.hero .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  background: var(--brand-50);
  border: 1px solid #a5f3fc;
  color: var(--brand-700);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 999px;
  margin-bottom: 14px;
}
.hero h1 {
  margin: 0 0 12px;
  font-size: clamp(1.7rem, 2.4vw, 2.4rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--ink);
}
.hero p.lede {
  margin: 0;
  font-size: 1.05rem;
  color: var(--ink-2);
  max-width: 70ch;
}
.hero .hero-actions {
  display: flex; gap: 10px; margin-top: 22px; flex-wrap: wrap;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r);
  color: var(--ink);
  font-weight: 600;
  font-size: 0.88rem;
  cursor: pointer;
  transition: all 0.12s ease;
  text-decoration: none;
}
.btn:hover {
  border-color: var(--brand);
  color: var(--brand-700);
  background: var(--brand-50);
  text-decoration: none;
}
.btn.primary {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}
.btn.primary:hover {
  background: var(--brand-600);
  border-color: var(--brand-600);
  color: #fff;
}
.btn.ghost {
  background: transparent;
  border-color: transparent;
}

/* ---- Headings ---- */
h1, h2, h3, h4 { color: var(--ink); letter-spacing: -0.015em; }
h2 {
  font-size: 1.55rem;
  margin: 44px 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}
h3 {
  font-size: 1.18rem;
  margin: 28px 0 10px;
}
h4 {
  font-size: 1rem;
  margin: 18px 0 8px;
  color: var(--ink-2);
}
p { margin: 0 0 14px; color: var(--ink-2); }

/* ---- Cards & grids ---- */
.grid {
  display: grid;
  gap: 16px;
}
.grid.two   { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid.four  { grid-template-columns: repeat(4, minmax(0,1fr)); }

.card {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 22px;
  box-shadow: var(--shadow-sm);
}
.card h3:first-child, .card h2:first-child { margin-top: 0; }
.card.tinted-teal  { background: linear-gradient(160deg, #ecfeff 0%, #ffffff 60%); border-color: #a5f3fc; }
.card.tinted-navy  { background: linear-gradient(160deg, #eef2ff 0%, #ffffff 60%); border-color: #c7d2fe; }
.card.tinted-amber { background: linear-gradient(160deg, #fff7ed 0%, #ffffff 60%); border-color: #fed7aa; }

.card-link {
  display: block;
  color: inherit;
  text-decoration: none;
  transition: all 0.15s ease;
}
.card-link:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: var(--brand);
  text-decoration: none;
}
.card-link .arrow {
  margin-top: 12px;
  color: var(--brand);
  font-weight: 600;
  font-size: 0.88rem;
}

/* ---- KPIs ---- */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
  margin: 16px 0 28px;
}
.kpi {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r);
  padding: 16px 18px;
  box-shadow: var(--shadow-sm);
}
.kpi .label {
  font-size: 0.78rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 700;
}
.kpi .value {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-top: 4px;
  line-height: 1.1;
}
.kpi .sub {
  font-size: 0.82rem;
  color: var(--muted);
  margin-top: 4px;
}
.kpi.accent .value { color: var(--brand-700); }
.kpi.warn .value { color: var(--warn); }

/* ---- Tables ---- */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r); }
.table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-elev);
  font-size: 0.92rem;
}
.table th, .table td {
  padding: 11px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}
.table th {
  background: var(--bg-soft);
  font-weight: 700;
  color: var(--ink);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.table tr:last-child td { border-bottom: none; }
.table tr:hover { background: var(--bg-soft); }
.table code {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 1px 6px;
  font-size: 0.86em;
  color: var(--navy);
}

/* ---- Inline code & code blocks ---- */
p code, li code, td code, h3 code, h4 code {
  background: #eef2ff;
  border: 1px solid #c7d2fe;
  color: var(--navy);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 0.86em;
  white-space: nowrap;
}

pre {
  background: var(--code-bg);
  color: var(--code-ink);
  border: 1px solid var(--code-line);
  border-radius: var(--r);
  padding: 14px 16px;
  overflow-x: auto;
  font-size: 0.84rem;
  line-height: 1.55;
  margin: 12px 0;
  position: relative;
}
pre code { background: transparent; border: none; padding: 0; color: inherit; white-space: pre; }
pre .copy-btn {
  position: absolute;
  top: 8px; right: 8px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.10);
  color: #cbd5e1;
  font-size: 0.72rem;
  padding: 4px 8px;
  border-radius: 5px;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.15s;
}
pre:hover .copy-btn { opacity: 1; }
pre .copy-btn:hover { background: rgba(255,255,255,0.12); }
pre .copy-btn.copied { color: #6ee7b7; }

/* ---- Badges / pills ---- */
.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  border: 1px solid;
  white-space: nowrap;
}
.badge.teal   { background: var(--brand-50); border-color: #a5f3fc; color: var(--brand-700); }
.badge.navy   { background: #eef2ff; border-color: #c7d2fe; color: var(--navy); }
.badge.amber  { background: var(--accent-50); border-color: #fed7aa; color: #c2410c; }
.badge.green  { background: #f0fdf4; border-color: #bbf7d0; color: #15803d; }
.badge.red    { background: #fef2f2; border-color: #fecaca; color: #b91c1c; }
.badge.gray   { background: var(--bg-soft); border-color: var(--line); color: var(--muted); }

/* ---- Callouts ---- */
.callout {
  border-left: 4px solid var(--brand);
  background: var(--brand-50);
  padding: 14px 18px;
  border-radius: var(--r-sm);
  margin: 16px 0;
  font-size: 0.94rem;
  color: var(--ink-2);
}
.callout strong { color: var(--brand-700); }
.callout.warn   { border-left-color: var(--warn); background: #fffbeb; }
.callout.warn strong { color: #b45309; }
.callout.danger { border-left-color: var(--danger); background: #fef2f2; }
.callout.danger strong { color: #b91c1c; }
.callout.info   { border-left-color: var(--info); background: #eff6ff; }
.callout.info strong { color: #1d4ed8; }
.callout.ok     { border-left-color: var(--ok); background: #f0fdf4; }
.callout.ok strong { color: #15803d; }

/* ---- Mermaid diagram container ---- */
.diagram {
  background: var(--bg-elev);
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: 22px 16px;
  margin: 18px 0;
  box-shadow: var(--shadow-sm);
  overflow-x: auto;
}
.diagram .mermaid { display: flex; justify-content: center; }
.diagram .caption {
  margin-top: 12px;
  font-size: 0.84rem;
  color: var(--muted);
  text-align: center;
  font-style: italic;
}

/* ---- Lists ---- */
ul, ol { padding-left: 22px; }
ul.tight li, ol.tight li { margin: 3px 0; }
ul.checks { list-style: none; padding-left: 0; }
ul.checks li {
  position: relative;
  padding: 4px 0 4px 26px;
}
ul.checks li::before {
  content: "✓";
  position: absolute;
  left: 0; top: 4px;
  color: var(--ok);
  font-weight: 800;
}

/* ---- Definition list ---- */
.dl-grid {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 10px 18px;
  margin: 12px 0;
}
.dl-grid dt {
  font-weight: 700;
  color: var(--ink);
  font-size: 0.92rem;
}
.dl-grid dd { margin: 0; color: var(--ink-2); font-size: 0.94rem; }

/* ---- ToC (right rail) ---- */
.content-with-toc {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 40px;
  align-items: start;
}
.toc {
  position: sticky;
  top: 80px;
  font-size: 0.85rem;
  border-left: 1px solid var(--line);
  padding-left: 18px;
}
.toc h5 {
  margin: 0 0 10px;
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  font-weight: 700;
}
.toc a {
  display: block;
  padding: 3px 0;
  color: var(--muted);
  text-decoration: none;
  border-left: 2px solid transparent;
  margin-left: -20px;
  padding-left: 18px;
  line-height: 1.45;
}
.toc a:hover { color: var(--brand-700); text-decoration: none; }
.toc a.active {
  color: var(--brand-700);
  border-left-color: var(--brand);
  font-weight: 600;
}
.toc a.h3 { padding-left: 30px; font-size: 0.82rem; }

/* ---- Footer ---- */
.footer {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---- Anchor offset for h2/h3 ---- */
h2, h3 { scroll-margin-top: 84px; }

/* ---- Responsive ---- */
@media (max-width: 1100px) {
  .content-with-toc { grid-template-columns: 1fr; }
  .toc { display: none; }
}
@media (max-width: 880px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    position: static;
    height: auto;
    border-right: none;
    border-bottom: 1px solid var(--line);
  }
  .grid.two, .grid.three, .grid.four { grid-template-columns: 1fr; }
  .dl-grid { grid-template-columns: 1fr; gap: 4px 0; }
  .dl-grid dt { margin-top: 8px; }
  .topbar { margin: -40px -24px 24px; }
  .content { padding: 24px 24px 64px; }
  .hero { padding: 24px 20px; }
}

/* ---- Print ---- */
@media print {
  .sidebar, .topbar, .toc { display: none; }
  .layout { grid-template-columns: 1fr; }
  .content { max-width: none; padding: 0; }
  .card, .diagram { break-inside: avoid; box-shadow: none; }
  a { color: var(--ink); }
}