/* calcofi.io brand — theme.css (v1)
   Contract: https://calcofi.io/brand/v1/  (README.md beside this file)

   The colour tokens and the header/footer chrome every CalCOFI product wears.
   Dark is the default; light is opted into by `:root[data-theme="light"]`,
   which theme.js sets from  ?theme=  →  cc_theme cookie  →  localStorage.theme.
   v1 is frozen once adopted: additive changes only; anything else is v2. */

:root {
  --bg:       #1b1d20;
  --panel:    #24272b;
  --panel-2:  #2c3035;
  --border:   #3a3f44;
  --fg:       #e6e9ed;
  --muted:    #9aa0a6;
  --accent:   #4dabf7;
  --accent-d: #339af0;
  --warn:     #fcc419;
  --mono:     ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --sans:     system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color-scheme: dark;
}
:root[data-theme="light"] {
  --bg:       #ffffff;
  --panel:    #f8f9fa;
  --panel-2:  #ffffff;
  --border:   #dee2e6;
  --fg:       #212529;
  --muted:    #6c757d;
  --accent:   #2780e3;
  --accent-d: #1c69bf;
  --warn:     #b08800;
  color-scheme: light;
}

/* ── header ───────────────────────────────────────────────────────────────
   <header class="cc-header">
     <a class="cc-home" href="https://calcofi.io"><img class="cc-logo-dark" …><img class="cc-logo-light" …></a>
     <a class="cc-title" href="./">Product</a>
     <span class="cc-spacer"></span>
     <nav class="cc-links">…</nav>
     <button class="cc-theme-toggle">🌓</button>
   </header>
   Self-contained (explicit font, colour, size) so it reads the same inside a
   Bootstrap page (Shiny, Quarto, pkgdown) as on a plain one. */

.cc-header {
  position: sticky; top: 0; z-index: 1020;
  display: flex; align-items: center; gap: 0.85rem;
  margin: 0; padding: 0.55rem 1rem;
  background: var(--panel); color: var(--fg);
  border-bottom: 1px solid var(--border);
  font-family: var(--sans); font-size: 0.9rem; line-height: 1.5;
}
.cc-header .cc-home { display: inline-flex; align-items: center; height: 32px; flex: none; }
.cc-header .cc-home img { height: 32px; width: auto; display: block; }
:root:not([data-theme="light"]) .cc-logo-light { display: none; }
:root[data-theme="light"]       .cc-logo-dark  { display: none; }

.cc-header .cc-title {
  margin: 0; font-size: 1.05rem; font-weight: 700; letter-spacing: 0.01em;
  color: var(--fg); text-decoration: none; white-space: nowrap;
}
.cc-header .cc-title:hover { color: var(--accent); text-decoration: none; }
.cc-header .cc-title small { font-weight: 400; color: var(--muted); font-size: 0.78rem; margin-left: 0.4rem; }
.cc-header .cc-spacer { flex: 1; }

/* the integrated-database release everything on the page came from — right
   after the title so it survives a collapsed sidebar and every tab switch, and
   travels with a screenshot. Links to that version's schema + release notes.
   <a class="cc-release" href="https://calcofi.io/db-schema/#erd?v=v2026.08.25">release <b>v2026.08.25</b></a>
   Not scoped to .cc-header: a framework-owned bar (bslib page_sidebar/page_navbar,
   pkgdown) puts it in its own brand slot. */
.cc-release {
  display: inline-flex; align-items: baseline; gap: 0.35em;
  font-family: var(--mono); font-size: 0.76rem; line-height: 1.2;
  color: var(--muted); text-decoration: none; white-space: nowrap;
  border: 1px solid var(--border); border-radius: 999px; padding: 0.15rem 0.6rem;
  font-variant-numeric: tabular-nums;
}
.cc-release b { font-weight: 600; color: var(--fg); }
.cc-release:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.cc-release:hover b { color: var(--accent); }
.navbar-brand .cc-release { margin-left: 0.5rem; vertical-align: middle; }

.cc-header .cc-links { display: inline-flex; flex-wrap: wrap; gap: 0.85rem; font-family: var(--mono); font-size: 0.82rem; }
.cc-header .cc-links a { color: var(--muted); text-decoration: none; }
.cc-header .cc-links a:hover { color: var(--accent); text-decoration: none; }

.cc-theme-toggle {
  background: transparent; border: 1px solid var(--border);
  color: var(--fg); font: inherit; line-height: 1.2; cursor: pointer;
  border-radius: 4px; padding: 0.2rem 0.55rem;
}
.cc-theme-toggle:hover { background: var(--panel-2); }

/* ── footer ─────────────────────────────────────────────────────────────── */

.cc-footer {
  margin-top: 3rem; padding-top: 1rem;
  border-top: 1px solid var(--border);
  color: var(--muted); font-family: var(--sans); font-size: 0.82rem;
}
.cc-footer p { margin: 0.25rem 0; }
.cc-footer a { color: var(--muted); }
.cc-footer a:hover { color: var(--accent); }

/* ── theme-paired images ───────────────────────────────────────────────────
   Two <img loading="lazy"> siblings, one per theme; the hidden one is never
   fetched. Same idiom as the header logo. */
:root:not([data-theme="light"]) .cc-light-only { display: none; }
:root[data-theme="light"]       .cc-dark-only  { display: none; }