/* Shared shell for the cbe-stories hub pages (overview, build, placeholders).
   The os2us-generated tranche pages keep their own self-contained layout;
   this stylesheet mirrors their design tokens so both feel like one site. */

:root {
  --bg-page: #fafaf9;
  --bg-card: #ffffff;
  --bg-topbar: rgba(255, 255, 255, 0.88);
  --bg-sidebar: #ffffff;
  --bg-code: #f5f5f4;
  --text: #1c1917;
  --text-muted: #57534e;
  --text-faint: #78716c;
  --border: #e7e5e4;
  --border-strong: #d6d3d1;
  --accent: #4f46e5;
  --accent-light: #eef2ff;
  --accent-text: #3730a3;
  --done-bg: #dcfce7;
  --done-text: #14532d;
  --done-border: #86efac;
  --pending-bg: #fef3c7;
  --pending-text: #78350f;
  --pending-border: #fcd34d;
  --testing-bg: #f0fdf4;
  --testing-text: #15803d;
  --testing-border: #bbf7d0;
  --sidebar-w: 248px;
  --topbar-h: 56px;
  --content-max: 880px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg-page);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
code, .mono {
  font-family: ui-monospace, "SF Mono", "Cascadia Mono", "JetBrains Mono", Menlo, monospace;
  font-size: 0.92em;
}
code {
  background: var(--bg-code);
  padding: 1px 5px;
  border-radius: 4px;
  border: 1px solid var(--border);
}
pre {
  background: var(--bg-code);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 12px 14px;
  overflow-x: auto;
}
pre code { background: none; border: none; padding: 0; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 26px; letter-spacing: -0.02em; line-height: 1.25; margin: 0 0 8px; }
h2 { font-size: 19px; letter-spacing: -0.01em; margin: 36px 0 12px; }
h3 { font-size: 16px; margin: 24px 0 8px; }

/* Topbar */
.site-topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 20px;
  background: var(--bg-topbar);
  backdrop-filter: saturate(180%) blur(8px);
  -webkit-backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--border);
}
.site-topbar .brand {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--text);
}
.site-topbar .brand .project { color: var(--text-faint); font-weight: 400; }
.nav-toggle {
  display: none;
  font: inherit;
  font-size: 13px;
  padding: 6px 10px;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  background: #fff;
  cursor: pointer;
}

/* Layout */
.site-layout {
  display: grid;
  grid-template-columns: var(--sidebar-w) 1fr;
  min-height: calc(100vh - var(--topbar-h));
}
.site-nav {
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  padding: 20px 14px 32px;
  position: sticky;
  top: var(--topbar-h);
  height: calc(100vh - var(--topbar-h));
  overflow-y: auto;
}
.site-nav .group {
  margin: 18px 6px 6px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faint);
}
.site-nav a.nav-link {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 14px;
}
.site-nav a.nav-link:hover { background: var(--bg-code); text-decoration: none; }
.site-nav a.nav-link.active {
  background: var(--accent-light);
  color: var(--accent-text);
  font-weight: 600;
}
.site-nav a.nav-link.sub { padding-left: 26px; font-size: 13px; }
.badge {
  margin-left: auto;
  font-size: 10.5px;
  font-weight: 600;
  padding: 1px 7px;
  border-radius: 999px;
  white-space: nowrap;
}
.badge.pending { background: var(--pending-bg); color: var(--pending-text); border: 1px solid var(--pending-border); }
.badge.done { background: var(--done-bg); color: var(--done-text); border: 1px solid var(--done-border); }
.badge.testing { background: var(--testing-bg); color: var(--testing-text); border: 1px solid var(--testing-border); }
.badge.neutral { background: var(--bg-code); color: var(--text-muted); border: 1px solid var(--border-strong); }

/* Content */
.site-main { padding: 40px 32px 80px; min-width: 0; }
.site-main .inner { max-width: var(--content-max); margin: 0 auto; }
.lede { color: var(--text-muted); font-size: 16px; margin: 0 0 28px; }

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px 24px;
  margin: 16px 0;
}
.card h2:first-child, .card h3:first-child { margin-top: 0; }

.callout {
  border-left: 3px solid var(--accent);
  background: var(--accent-light);
  border-radius: 0 10px 10px 0;
  padding: 12px 18px;
  margin: 16px 0;
  color: var(--accent-text);
}
.callout.warn {
  border-left-color: var(--pending-border);
  background: var(--pending-bg);
  color: var(--pending-text);
}

/* Download buttons (build page) */
.dl-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 12px; margin: 16px 0; }
.dl-card {
  display: block;
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: 12px;
  padding: 14px 16px;
  color: var(--text);
  transition: border-color 120ms, box-shadow 120ms;
}
.dl-card:hover { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-light); text-decoration: none; }
.dl-card .platform { font-weight: 600; font-size: 14px; display: block; }
.dl-card .file { color: var(--text-muted); font-size: 12.5px; display: block; margin-top: 2px; word-break: break-all; }
.dl-card .size { color: var(--text-faint); font-size: 12px; }

.meta-row { color: var(--text-muted); font-size: 13.5px; margin: 4px 0 20px; }
.meta-row strong { color: var(--text); }

.status-list { list-style: none; margin: 8px 0 20px; padding: 0; }
.status-list li { border-bottom: 1px solid var(--border); padding: 10px 0; }
.status-list li:last-child { border-bottom: 0; }
.status-heading { display: flex; align-items: baseline; flex-wrap: wrap; gap: 8px; }
.status-heading .badge { margin-left: 0; }
.status-detail { color: var(--text-muted); font-size: 13.5px; margin: 3px 0 0; }
.status-detail code { overflow-wrap: anywhere; word-break: break-word; }

table { border-collapse: collapse; width: 100%; margin: 12px 0; font-size: 14px; }
th, td { text-align: left; padding: 8px 12px; border-bottom: 1px solid var(--border); }
th { color: var(--text-faint); font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; }

/* Responsive */
@media (max-width: 860px) {
  .site-layout { grid-template-columns: 1fr; }
  .site-nav {
    position: fixed;
    top: var(--topbar-h);
    left: 0;
    width: min(300px, 84vw);
    transform: translateX(-105%);
    transition: transform 160ms ease;
    z-index: 15;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
  }
  body.nav-open .site-nav { transform: translateX(0); }
  .nav-toggle { display: inline-block; }
  .site-main { padding: 28px 18px 64px; }
  /* A long status badge in a table cell would otherwise force the table wider
     than a phone viewport (the overview's phase table did). */
  td .badge { white-space: normal; display: inline-block; }
}