/* ═══════════════════════════════════════════════════════════════════
   Atrium docs shell — shared by docs.html, installer-guide.html,
   api-docs.html. Mirrors the portal's look: navy sidebar + top bar,
   navy/gold accent tokens (#061A40 / #0B2A5B / #D4AF37), light theme
   by default, dark via prefers-color-scheme.
   ═══════════════════════════════════════════════════════════════════ */
:root {
  --bg-body: #f4f4fb;
  --bg-card: #ffffff;
  --bg-card-alt: #faf9ff;
  --bg-input: #f1f0f8;
  --text-primary: #16131f;
  --text-secondary: #5b5870;
  --text-muted: #918ea6;
  --border-color: #e8e7f2;
  --border-light: #f0eff7;
  --accent: #0B2A5B;
  --accent-soft: rgba(11,42,91,0.09);
  --gold: #D4AF37;
  --grad: linear-gradient(120deg, #061A40 0%, #0B2A5B 55%, #D4AF37 100%);
  --grad-soft: linear-gradient(120deg, rgba(11,42,91,0.14), rgba(212,175,55,0.18));
  --sidebar: #061A40;
  --sidebar-2: #0A2450;
  --sidebar-text: #a6b2ce;
  --sidebar-mute: #64749b;
  --sidebar-hover: #0F3061;
  --shadow-card: 0 1px 2px rgba(20,16,40,0.04), 0 8px 24px -14px rgba(20,16,40,0.10);
  --shadow-card-hover: 0 8px 28px -12px rgba(20,16,40,0.16);
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg-body: #0a0912;
    --bg-card: #14121f;
    --bg-card-alt: #100e19;
    --bg-input: #201d2e;
    --text-primary: #ecebf6;
    --text-secondary: #a09db4;
    --text-muted: #6f6c84;
    --border-color: #262336;
    --border-light: #1e1b2b;
    --accent: #D4AF37;
    --accent-soft: rgba(212,175,55,0.14);
    --gold: #D4AF37;
    --grad: linear-gradient(120deg, #0B2A5B 0%, #D4AF37 100%);
    --grad-soft: linear-gradient(120deg, rgba(30,72,140,0.30), rgba(212,175,55,0.16));
    --sidebar: #04122E;
    --sidebar-2: #081C40;
    --sidebar-text: #a6b2ce;
    --sidebar-mute: #5c6b90;
    --sidebar-hover: #0C2450;
    --shadow-card: 0 1px 2px rgba(0,0,0,0.3), 0 12px 32px -16px rgba(0,0,0,0.5);
    --shadow-card-hover: 0 12px 32px -12px rgba(0,0,0,0.6);
    color-scheme: dark;
  }
}

/* ── Base ─────────────────────────────────────────────────────────── */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg-body); color: var(--text-primary); line-height: 1.6; min-height: 100vh;
}
* { scrollbar-width: thin; scrollbar-color: #C7A233 transparent; }
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: color-mix(in srgb, var(--gold) 10%, transparent); }
::-webkit-scrollbar-thumb { background: linear-gradient(180deg, #E2C25E 0%, #A8871F 100%); border-radius: 999px; }
::-webkit-scrollbar-corner { background: transparent; }

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
kbd { display: inline-block; background: var(--bg-input); border: 1px solid var(--border-color); border-bottom-width: 2px; border-radius: 4px; padding: 1px 6px; font-family: monospace; font-size: 12px; color: var(--text-primary); }
code { font-family: 'SF Mono', Monaco, 'Cascadia Code', ui-monospace, monospace; }
pre { background: var(--bg-input); border: 1px solid var(--border-color); border-radius: 8px; padding: 14px 16px; overflow-x: auto; font-size: 13px; line-height: 1.5; margin-bottom: 12px; color: var(--text-primary); }

/* ── Chrome: sidebar + top bar + main column ─────────────────────── */
.docs-side {
  position: fixed; top: 0; left: 0; bottom: 0; width: 232px; z-index: 40;
  display: flex; flex-direction: column; gap: 1px; padding: 4px 12px 10px;
  background: var(--sidebar); border-right: 1px solid rgba(255,255,255,0.05);
  overflow-y: auto;
}
.docs-side .side-brand { padding: 10px 10px 6px; text-align: center; display: block; }
.docs-side .side-brand img { width: 104px; height: auto; display: block; margin: 0 auto; }
.docs-side .nav-group { display: block; padding: 8px 10px 3px; font-size: 10px; font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: var(--sidebar-mute); white-space: nowrap; }
.side-link {
  display: flex; align-items: center; gap: 10px; position: relative; white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  padding: 5px 10px; border-radius: 9px; font-size: 13px; font-weight: 500;
  color: var(--sidebar-text); text-decoration: none; transition: background .15s, color .15s;
}
.side-link:hover { color: #fff; background: var(--sidebar-hover); text-decoration: none; }
.side-link.active { color: #fff; background: var(--grad-soft); }
.side-link.active::before { content: ""; position: absolute; left: -12px; top: 6px; bottom: 6px; width: 3px; border-radius: 0 3px 3px 0; background: linear-gradient(180deg, #E2C25E, #D4AF37); }
.side-link.sub { font-size: 12.5px; padding-left: 20px; color: var(--sidebar-mute); }
.side-link.sub:hover { color: var(--sidebar-text); }
.docs-side .side-foot { margin-top: auto; padding: 8px 10px 3px; }
.docs-side .side-foot a { font-size: 12.5px; color: var(--sidebar-mute); }
.docs-side .side-foot a:hover { color: var(--sidebar-text); text-decoration: none; }

.docs-top {
  position: sticky; top: 0; z-index: 30; margin-left: 232px;
  display: flex; align-items: center; gap: 14px;
  padding: 12px 28px; border-bottom: 1px solid var(--border-color);
  background: color-mix(in srgb, var(--bg-body) 84%, transparent); backdrop-filter: blur(12px);
}
.docs-top .crumb { font-size: 14px; font-weight: 650; color: var(--text-primary); letter-spacing: -0.01em; }
.docs-top .crumb span { color: var(--text-muted); font-weight: 500; }
.docs-top .top-actions { margin-left: auto; display: flex; gap: 8px; align-items: center; }
.docs-top .top-link { font-size: 12.5px; padding: 5px 12px; border: 1px solid var(--border-color); border-radius: 7px; background: var(--bg-card); color: var(--text-secondary); text-decoration: none; }
.docs-top .top-link:hover { color: var(--text-primary); border-color: var(--text-secondary); }

.docs-main { margin-left: 232px; padding: 28px 28px 80px; }
.docs-main .container { max-width: 900px; margin: 0 auto; padding: 0; }

/* Mobile: sidebar off, small page-nav strip under the top bar */
.docs-mobilenav { display: none; }
@media (max-width: 880px) {
  .docs-side { display: none; }
  .docs-top, .docs-main { margin-left: 0; }
  .docs-mobilenav { display: flex; gap: 8px; overflow-x: auto; padding: 10px 20px; border-bottom: 1px solid var(--border-color); background: var(--sidebar); }
  .docs-mobilenav a { flex: none; font-size: 12.5px; padding: 6px 12px; border-radius: 999px; color: var(--sidebar-text); background: var(--sidebar-2); text-decoration: none; }
  .docs-mobilenav a.active { color: #fff; background: var(--sidebar-hover); box-shadow: inset 0 -2px 0 var(--gold); }
  .docs-main { padding: 22px 20px 60px; }
}

/* ── Shared doc typography ────────────────────────────────────────── */
.docs-main h1 { font-size: 27px; color: var(--text-primary); margin-bottom: 8px; letter-spacing: -0.02em; }
.docs-main h1 span { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
@media (prefers-color-scheme: dark) {
  .docs-main h1 span { background: linear-gradient(120deg, #7FA3D8 0%, #D4AF37 100%); -webkit-background-clip: text; background-clip: text; }
}
.docs-main .subtitle { color: var(--text-secondary); font-size: 15px; margin-bottom: 32px; }
.docs-main h2 { font-size: 20px; color: var(--text-primary); margin: 46px 0 16px; padding-bottom: 8px; border-bottom: 1px solid var(--border-color); }
.docs-main h3 { font-size: 16px; color: var(--text-primary); margin: 26px 0 10px; }
.docs-main p { color: var(--text-secondary); margin-bottom: 12px; font-size: 14px; }
.docs-main ul, .docs-main ol { margin: 8px 0 16px 22px; }
.docs-main li { margin-bottom: 6px; font-size: 14px; color: var(--text-secondary); }
.docs-main li strong, .docs-main p strong { color: var(--text-primary); }
.phase-tag { display: inline-block; background: var(--grad); color: #fff; font-size: 11px; font-weight: 700; padding: 3px 10px; border-radius: 999px; vertical-align: middle; margin-right: 10px; letter-spacing: 0.5px; }

/* ── Shared components ────────────────────────────────────────────── */
.toc, .step, .checklist, .troubleshoot, .auth-box {
  background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 12px;
  box-shadow: var(--shadow-card);
}
.toc { padding: 20px 24px; margin-bottom: 32px; }
.toc h3 { margin-top: 0; color: var(--text-primary); }
.toc ul { list-style: none; padding: 0; margin: 0; }
.toc li { padding: 4px 0; }
.toc a { font-size: 14px; }

.step { padding: 18px 22px; margin-bottom: 16px; }
.step-num { display: inline-block; width: 26px; height: 26px; background: var(--grad); color: #fff; border-radius: 50%; text-align: center; line-height: 26px; font-weight: 700; font-size: 13px; margin-right: 10px; vertical-align: middle; }
.step h3 { display: inline-block; margin: 0; vertical-align: middle; }
.step-body { margin-top: 12px; }
.step-body p:last-child { margin-bottom: 0; }

.checklist { padding: 16px 22px; margin: 12px 0; }
.checklist h4 { font-size: 12px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 10px; }
.checklist ul { list-style: none; margin: 0; padding: 0; }
.checklist li { padding: 4px 0 4px 28px; position: relative; }
.checklist li:before { content: "☐"; position: absolute; left: 4px; top: 4px; color: var(--gold); font-size: 16px; line-height: 1; }

.troubleshoot { padding: 14px 18px; margin-bottom: 12px; }
.troubleshoot h4 { color: var(--accent); font-size: 14px; margin-bottom: 6px; }
.troubleshoot p { font-size: 13px; }
.troubleshoot p:last-child, .troubleshoot ul:last-child { margin-bottom: 0; }

/* Callouts: tinted band + coloured strong; readable in both themes */
.callout { border-radius: 8px; padding: 12px 16px; font-size: 13px; margin: 14px 0; line-height: 1.55; border: 1px solid; border-left-width: 3px; color: var(--text-secondary); }
.callout strong { display: block; margin-bottom: 4px; font-size: 13px; }
.callout.info    { background: rgba(66,133,244,0.09);  border-color: rgba(66,133,244,0.35);  }
.callout.info strong    { color: #4285f4; }
.callout.warning { background: rgba(255,152,0,0.09);   border-color: rgba(255,152,0,0.35);   }
.callout.warning strong { color: #FF9800; }
.callout.danger  { background: rgba(244,67,54,0.09);   border-color: rgba(244,67,54,0.35);   }
.callout.danger strong  { color: #F44336; }
.callout.success { background: rgba(76,175,80,0.09);   border-color: rgba(76,175,80,0.35);   }
.callout.success strong { color: #4CAF50; }

/* Featured download band — Atrium gradient */
.download-box { background: var(--grad); color: #fff; border-radius: 12px; padding: 22px 26px; margin: 20px 0; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; box-shadow: var(--shadow-card); }
.download-box h3 { color: #fff; margin: 0 0 4px; font-size: 17px; }
.download-box p { color: rgba(255,255,255,0.88); margin: 0; font-size: 13px; }
.download-button { background: #fff; color: #0B2A5B; padding: 11px 20px; border-radius: 8px; font-weight: 700; text-decoration: none; font-size: 14px; white-space: nowrap; }
.download-button:hover { text-decoration: none; background: #f1f0f8; }

/* Doc-hub cards (docs.html) */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 18px; }
.card { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 14px; padding: 24px; box-shadow: var(--shadow-card); transition: box-shadow .18s, transform .18s, border-color .18s; display: flex; flex-direction: column; gap: 10px; }
.card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-2px); border-color: var(--accent); }
.card .tag { display: inline-block; background: var(--accent-soft); color: var(--accent); font-size: 11px; font-weight: 700; padding: 3px 10px; border-radius: 999px; align-self: flex-start; letter-spacing: 0.5px; text-transform: uppercase; }
.card h3 { font-size: 17px; color: var(--text-primary); margin: 6px 0 0; font-weight: 600; }
.card p { color: var(--text-secondary); font-size: 14px; margin: 4px 0 12px; }
.card .cta { color: var(--accent); font-weight: 600; font-size: 14px; align-self: flex-start; }
.card.featured { background: var(--grad); border: none; }
.card.featured h3 { color: #fff; }
.card.featured p { color: rgba(255,255,255,0.88); }
.card.featured .tag { background: rgba(255,255,255,0.2); color: #fff; }
.card.featured .cta { color: #fff; }
.card.featured .cta:after { content: " →"; }

/* API reference components (api-docs.html) */
.auth-box { padding: 16px 20px; margin-bottom: 24px; }
.auth-box h3 { margin-top: 0; }
.auth-box code { color: var(--accent); }
.endpoint { background: var(--bg-card); border: 1px solid var(--border-color); border-radius: 12px; margin-bottom: 20px; overflow: hidden; box-shadow: var(--shadow-card); }
.endpoint-header { padding: 14px 20px; display: flex; align-items: center; gap: 12px; border-bottom: 1px solid var(--border-color); background: var(--bg-card-alt); }
.method { font-size: 12px; font-weight: 700; padding: 4px 10px; border-radius: 5px; font-family: monospace; }
.method.get    { background: rgba(76,175,80,0.15);  color: #4CAF50; }
.method.post   { background: rgba(66,133,244,0.15); color: #4285f4; }
.method.put    { background: rgba(255,152,0,0.16);  color: #FF9800; }
.method.delete { background: rgba(244,67,54,0.15);  color: #F44336; }
.path { font-family: monospace; font-size: 14px; color: var(--text-primary); }
.endpoint-body { padding: 16px 20px; }
.endpoint-body p { font-size: 13px; }
.label { font-size: 11px; color: var(--text-muted); text-transform: uppercase; letter-spacing: 1px; margin: 12px 0 6px; }
.field-table { width: 100%; border-collapse: collapse; margin-bottom: 12px; font-size: 13px; }
.field-table th { text-align: left; color: var(--text-muted); font-size: 11px; text-transform: uppercase; letter-spacing: 1px; padding: 6px 12px; border-bottom: 2px solid var(--border-color); }
.field-table td { padding: 6px 12px; border-bottom: 1px solid var(--border-light); color: var(--text-secondary); }
.field-table td:first-child { font-family: monospace; color: var(--accent); }
.required { color: #F44336; font-size: 11px; }
.optional { color: var(--text-muted); font-size: 11px; }
.note    { background: rgba(76,175,80,0.09); border: 1px solid rgba(76,175,80,0.35); border-radius: 8px; padding: 10px 14px; font-size: 13px; color: var(--text-secondary); margin: 12px 0; white-space: pre-line; }
.warning { background: rgba(255,152,0,0.09); border: 1px solid rgba(255,152,0,0.35); border-radius: 8px; padding: 10px 14px; font-size: 13px; color: var(--text-secondary); margin: 12px 0; }
.side-effect { font-size: 12px; color: var(--text-muted); font-style: italic; margin-top: 8px; }

.docs-footer { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--border-color); font-size: 13px; color: var(--text-muted); }
.docs-footer a { color: var(--accent); }

/* ── Print: content only, no chrome ──────────────────────────────── */
@media print {
  .docs-side, .docs-top, .docs-mobilenav { display: none !important; }
  .docs-main { margin-left: 0; padding: 20px; }
  body { font-size: 12px; background: #fff; }
  h2 { page-break-after: avoid; }
  .step, .endpoint { page-break-inside: avoid; box-shadow: none; }
  .download-box { background: #f0f0f0 !important; color: #111 !important; }
  .download-box h3, .download-box p { color: #111 !important; }
  .download-button { display: none; }
  a { color: #111; }
}