/* GlassFrame Protocol documentation site
   Palette: ink / paper / glass-deep-mid-light / frame (brass)
   No transitions, no animations, no transforms-for-motion — static by design. */

:root {
  --ink: #1C2531;
  --ink-soft: #4B5768;
  --paper: #F6F3EC;
  --paper-raised: #EFEADD;
  --code-bg: #EAEFEE;
  --glass-deep: #101B2D;
  --glass-mid: #1F3B54;
  --glass-light: #4E869B;
  --frame: #B8874F;
  --frame-deep: #8F6435;
  --rule: #DED7C4;
  --rule-dark: rgba(255, 255, 255, 0.14);
  --sidebar-w: 280px;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  font-family: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
}

.layout { display: flex; min-height: 100vh; }

/* ---------- Sidebar ---------- */

.sidebar {
  width: var(--sidebar-w);
  flex-shrink: 0;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  background: linear-gradient(160deg, var(--glass-deep) 0%, var(--glass-mid) 58%, var(--glass-light) 130%);
  color: #EAF0F2;
  padding: 30px 20px 24px;
  overflow-y: auto;
  border-right: 1px solid var(--rule-dark);
}

.brand {
  display: flex;
  align-items: center;
  gap: 13px;
  margin-bottom: 26px;
  text-decoration: none;
  padding: 0 6px;
}

.brand .mark { flex-shrink: 0; }

.brand-text { display: flex; flex-direction: column; gap: 3px; }

.brand-name {
  font-family: 'Source Serif 4', Georgia, serif;
  font-weight: 700;
  font-size: 17px;
  color: #F6F3EC;
  line-height: 1.2;
}

.brand-meta {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 11px;
  letter-spacing: 0.06em;
  color: rgba(234, 240, 242, 0.6);
}

.nav { display: flex; flex-direction: column; gap: 2px; }

.nav a {
  color: rgba(234, 240, 242, 0.82);
  text-decoration: none;
  font-size: 14.5px;
  padding: 8px 10px;
  border-radius: 4px;
  border-left: 3px solid transparent;
}

.nav a:hover { background: rgba(255, 255, 255, 0.07); color: #fff; }

.nav a.active {
  background: rgba(184, 135, 79, 0.18);
  border-left-color: var(--frame);
  color: #fff;
  font-weight: 600;
}

.nav a:focus-visible {
  outline: 2px solid var(--frame);
  outline-offset: -2px;
}

.nav a[target="_blank"]::after { content: " \2197"; font-size: 0.85em; }

.nav-group {
  display: block;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(234, 240, 242, 0.45);
  margin: 16px 0 6px;
  padding: 0 10px;
}

.nav hr.divider {
  border: none;
  border-top: 1px solid var(--rule-dark);
  margin: 16px 4px 6px;
}

/* ---------- Content ---------- */

.content {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  justify-content: center;
  padding: 58px 48px 90px;
}

article { max-width: 700px; width: 100%; }

.eyebrow {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--frame-deep);
  margin: 0 0 12px;
}

article h1 {
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 34px;
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 18px;
  color: var(--ink);
}

article h2 {
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 22px;
  font-weight: 700;
  line-height: 1.3;
  margin: 40px 0 14px;
  padding-top: 18px;
  border-top: 1px solid var(--rule);
  color: var(--ink);
}

article h2:first-of-type { border-top: none; padding-top: 0; margin-top: 26px; }

article h3 {
  font-family: 'Source Serif 4', Georgia, serif;
  font-size: 18px;
  font-weight: 700;
  margin: 26px 0 10px;
  color: var(--ink);
}

article p, article li { font-size: 15.5px; color: var(--ink); }
article p { margin: 0 0 16px; }

article ul, article ol { padding-left: 22px; margin: 0 0 16px; }
article li { margin-bottom: 6px; }
article li > ul, article li > ol { margin-top: 6px; margin-bottom: 0; }

article strong { font-weight: 700; }
article em { font-style: italic; color: var(--ink-soft); }

article hr { border: none; border-top: 1px solid var(--rule); margin: 32px 0; }

article a {
  color: var(--frame-deep);
  text-decoration: underline;
  text-decoration-color: rgba(143, 100, 53, 0.38);
  text-underline-offset: 2px;
}

article a:hover { color: var(--glass-mid); text-decoration-color: currentColor; }
article a:focus-visible { outline: 2px solid var(--frame); outline-offset: 2px; }
article a[target="_blank"]::after { content: " \2197"; font-size: 0.85em; }

/* inline code — scoped away from highlighted fenced blocks entirely */
article :where(p, li, td, th, h1, h2, h3) code {
  font-family: 'IBM Plex Mono', ui-monospace, monospace;
  font-size: 0.87em;
  background: var(--code-bg);
  padding: 0.15em 0.42em;
  border-radius: 3px;
  color: #243447;
}

/* fenced / highlighted code blocks */
.hl {
  background: var(--code-bg);
  border: 1px solid var(--rule);
  border-radius: 6px;
  margin: 20px 0;
  overflow-x: auto;
}
.hl pre { margin: 0; padding: 16px 18px; }
.hl code { font-size: 13.5px; line-height: 1.7; }

.hl .k, .hl .kd, .hl .kc, .hl .kn, .hl .ow { color: var(--glass-mid); font-weight: 600; }
.hl .s, .hl .s1, .hl .s2 { color: #4B7A63; }
.hl .c, .hl .c1, .hl .cm { color: #8A8272; font-style: italic; }
.hl .mi, .hl .mf { color: var(--frame-deep); }
.hl .nx, .hl .n, .hl .nb { color: var(--ink); }
.hl .p, .hl .o { color: var(--ink-soft); }

/* tables */
article table {
  width: 100%;
  border-collapse: collapse;
  margin: 22px 0;
  font-size: 14.5px;
}
article th, article td { border: 1px solid var(--rule); padding: 9px 12px; text-align: left; vertical-align: top; }
article th {
  background: var(--paper-raised);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
  font-weight: 600;
}
article tr:nth-child(even) td { background: rgba(16, 27, 45, 0.02); }

.page-footer {
  margin-top: 56px;
  padding-top: 20px;
  border-top: 1px solid var(--rule);
  font-size: 12.5px;
  color: var(--ink-soft);
  font-family: 'IBM Plex Mono', monospace;
}

/* ---------- Mobile ---------- */

@media (max-width: 860px) {
  .layout { flex-direction: column; }
  .sidebar {
    position: static;
    width: 100%;
    border-right: none;
    border-bottom: 1px solid var(--rule-dark);
    padding: 20px 18px;
  }
  .content { margin-left: 0; padding: 34px 22px 64px; justify-content: flex-start; }
  .nav { flex-direction: row; flex-wrap: wrap; gap: 4px; }
  .nav-group { width: 100%; margin: 10px 0 2px; }
  .nav hr.divider { display: none; }
  article h1 { font-size: 27px; }
  article h2 { font-size: 20px; }
}

@media (max-width: 480px) {
  .content { padding: 26px 16px 52px; }
  article { font-size: 15px; }
}

/* ---------- Quick Access drawer ---------- */
/* Same "no transitions" rule as the rest of the site: it snaps open and
   shut rather than sliding. */

.qa-trigger {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 40;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 16px;
  background: var(--glass-deep);
  color: #F6F3EC;
  border: 1px solid var(--frame);
  border-radius: 5px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  cursor: pointer;
  box-shadow: 0 2px 10px rgba(16, 27, 45, 0.28);
}

.qa-trigger:hover { background: var(--glass-mid); }
.qa-trigger:focus-visible { outline: 2px solid var(--frame); outline-offset: 2px; }

.qa-trigger .qa-trigger-mark {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--frame);
}

.qa-backdrop {
  position: fixed;
  inset: 0;
  z-index: 45;
  background: rgba(16, 27, 45, 0.42);
}

.qa-backdrop[hidden] { display: none; }

.qa-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  z-index: 50;
  width: 360px;
  max-width: 88vw;
  background: var(--paper-raised);
  border-left: 1px solid var(--rule);
  box-shadow: -6px 0 24px rgba(16, 27, 45, 0.22);
  overflow-y: auto;
  padding: 22px 22px 28px;
}

.qa-drawer[hidden] { display: none; }

.qa-drawer-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--rule);
}

.qa-drawer-title {
  font-family: 'Source Serif 4', Georgia, serif;
  font-weight: 700;
  font-size: 20px;
  color: var(--ink);
}

.qa-drawer-sub {
  font-size: 13.5px;
  color: var(--ink-soft);
  margin: -10px 0 20px;
}

.qa-close {
  border: none;
  background: none;
  font-size: 22px;
  line-height: 1;
  color: var(--ink-soft);
  cursor: pointer;
  padding: 4px 6px;
  border-radius: 4px;
}

.qa-close:hover { color: var(--ink); background: rgba(16, 27, 45, 0.06); }
.qa-close:focus-visible { outline: 2px solid var(--frame); outline-offset: 1px; }

.qa-option {
  display: block;
  padding: 15px 16px;
  margin-bottom: 12px;
  background: var(--paper);
  border: 1px solid var(--rule);
  border-radius: 6px;
  text-decoration: none;
}

.qa-option:hover { border-color: var(--frame); background: #FBF8F0; }
.qa-option:focus-visible { outline: 2px solid var(--frame); outline-offset: 2px; }

.qa-option-label {
  display: block;
  font-family: 'Source Serif 4', Georgia, serif;
  font-weight: 700;
  font-size: 16px;
  color: var(--ink);
  margin-bottom: 5px;
}

.qa-option[href$=".md"] .qa-option-label::after { content: " \2193"; color: var(--frame-deep); }
.qa-option:not([href$=".md"]) .qa-option-label::after { content: " \2192"; color: var(--frame-deep); }

.qa-option-desc {
  display: block;
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--ink-soft);
}

@media (max-width: 480px) {
  .qa-trigger { right: 14px; bottom: 14px; padding: 10px 14px; font-size: 11px; }
  .qa-drawer { width: 100%; max-width: 100vw; padding: 18px 16px 24px; }
}