/* EduAI Skill Hub — browse face.
   "Calm Console" design tokens shared with qagent-webui: navy + gold,
   dark default, light via [data-theme] override or prefers-color-scheme.
   One accent at a time, minimal shadows, prose-first. */

/* One palette, defined once. `light-dark()` resolves each token from the
   element's used color-scheme, so dark is the default, the OS preference is
   tracked automatically, and the [data-theme] toggle just flips color-scheme —
   no duplicated light/dark blocks. */
:root {
  color-scheme: dark light;
  --bg: light-dark(#FEFCF7, #0D0D1A); --sidebar: light-dark(#FAF7F0, #141425);
  --surface: light-dark(#F3EEE3, #1A1A2E); --code-bg: light-dark(#F5F0E5, #12121f);
  --border: light-dark(#E0D8C8, #2A2A45);
  --border-subtle: light-dark(rgba(0, 0, 0, .08), rgba(255, 255, 255, .075));
  --text: light-dark(#1A1610, #FFF8DC); --muted: light-dark(#5C5344, #C0C0C0);
  --strong: light-dark(#0F0D08, #FFFFFF);
  --accent: light-dark(#B8860B, #FFD700); --accent-hover: light-dark(#996F08, #FFBF00);
  --accent-bg: light-dark(rgba(184, 134, 11, .08), rgba(255, 215, 0, .08));
  --accent-bg-strong: light-dark(rgba(184, 134, 11, .15), rgba(255, 215, 0, .15));
  --focus-ring: light-dark(rgba(184, 134, 11, .35), rgba(255, 215, 0, .35));
  --error: light-dark(#C62828, #EF5350); --success: light-dark(#3D8B40, #4CAF50);
  --warning: light-dark(#E68A00, #FFA726); --info: light-dark(#0288A8, #4DD0E1);
  --hover-tint: light-dark(rgba(0, 0, 0, .04), rgba(255, 255, 255, .04));
  /* The EduAI mark is a single-colour transparent shape, so it is masked and
     inked per theme: brand navy on light, cream on dark (it would otherwise
     vanish against the navy-black dark background). */
  --logo-ink: light-dark(#0F1C3F, #FFF8DC);
  --radius-sm: 4px; --radius-md: 8px; --radius-lg: 12px; --radius-pill: 999px;
}
/* Explicit toggle wins over the OS preference. */
:root[data-theme="light"] { color-scheme: light; }
:root[data-theme="dark"] { color-scheme: dark; }

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg); color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, system-ui, sans-serif;
  font-size: 14px; line-height: 1.6; -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
code, .mono { font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace; }
img { max-width: 100%; }

/* ---- top bar --------------------------------------------------------- */
.topbar {
  position: sticky; top: 0; z-index: 20;
  display: flex; align-items: center; gap: 20px;
  padding: 12px 24px; border-bottom: 1px solid var(--border-subtle);
  background: color-mix(in srgb, var(--sidebar) 92%, transparent);
  backdrop-filter: saturate(1.2) blur(8px);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: 16px; color: var(--strong); }
.brand .mark {
  width: 26px; height: 26px; flex: none; background-color: var(--logo-ink);
  -webkit-mask: url("/static/eduai-logo.png") center / contain no-repeat;
  mask: url("/static/eduai-logo.png") center / contain no-repeat;
}
.brand .sub { color: var(--muted); font-weight: 400; font-size: 12px; }
.topbar nav { margin-left: auto; display: flex; align-items: center; gap: 8px; }
.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 34px; height: 34px; border-radius: var(--radius-md);
  border: 1px solid transparent; background: transparent; color: var(--muted);
  cursor: pointer; font-size: 15px;
}
.icon-btn:hover { background: var(--hover-tint); color: var(--text); }

/* ---- layout ---------------------------------------------------------- */
.wrap { max-width: 1120px; margin: 0 auto; padding: 32px 24px 80px; }
.page-head h1 { font-size: 26px; margin: 0 0 6px; color: var(--strong); letter-spacing: -.01em; }
.page-head p { color: var(--muted); margin: 0 0 24px; font-size: 14px; }

/* ---- controls (search / sort / view) --------------------------------- */
.controls { display: flex; gap: 12px; align-items: center; margin-bottom: 16px; flex-wrap: wrap; }
.search { position: relative; flex: 1; min-width: 220px; }
.search input {
  width: 100%; background: var(--surface); color: var(--text);
  border: 1px solid var(--border); border-radius: var(--radius-md);
  padding: 10px 12px 10px 34px; font-size: 14px; font-family: inherit;
}
.search input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--focus-ring); }
.search .mag { position: absolute; left: 11px; top: 50%; transform: translateY(-50%); color: var(--muted); font-size: 13px; }
select.sort {
  background: var(--surface); color: var(--text); border: 1px solid var(--border);
  border-radius: var(--radius-md); padding: 9px 12px; font-size: 13px; font-family: inherit; cursor: pointer;
}
.view-toggle { display: inline-flex; border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; }
.view-toggle button {
  border: none; background: var(--surface); color: var(--muted);
  padding: 8px 11px; cursor: pointer; font-size: 14px; line-height: 1;
}
.view-toggle button.on { background: var(--accent-bg); color: var(--accent); }

/* ---- category tabs + tag chips --------------------------------------- */
.tabs { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 14px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px; cursor: pointer;
  border-radius: var(--radius-pill); padding: 6px 14px; font-size: 13px;
  background: var(--surface); color: var(--muted); border: 1px solid var(--border-subtle);
  user-select: none;
}
.chip:hover { color: var(--text); }
.chip.on { background: var(--accent); color: #14140f; border-color: transparent; font-weight: 600; }
.chip .n { font-size: 11px; opacity: .7; }
.tagbar { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; margin-bottom: 10px; }
.tagbar .lead { color: var(--muted); font-size: 12px; margin-right: 4px; }
.tag-chip {
  cursor: pointer; border-radius: var(--radius-pill); padding: 3px 10px; font-size: 11px;
  background: transparent; color: var(--muted); border: 1px solid var(--border);
}
.tag-chip:hover { color: var(--text); border-color: var(--accent); }
.tag-chip.on { background: var(--accent-bg); color: var(--accent); border-color: transparent; }

.count { color: var(--muted); font-size: 12px; margin: 8px 0 16px; }

/* ---- skill grid / cards ---------------------------------------------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }
.grid.list { grid-template-columns: 1fr; }
.card {
  display: flex; flex-direction: column; gap: 12px;
  background: var(--surface); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg); padding: 18px 18px 14px;
  transition: border-color .15s ease, transform .15s ease;
}
.card:hover { border-color: var(--border); transform: translateY(-1px); }
.card .badges { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.badge-cat {
  display: inline-block; border-radius: var(--radius-pill); padding: 2px 10px;
  font-size: 11px; font-weight: 600; background: var(--text); color: var(--bg);
}
.badge-tag {
  display: inline-block; border-radius: var(--radius-pill); padding: 2px 9px;
  font-size: 11px; color: var(--muted); border: 1px solid var(--border);
}
.badge-feat {
  display: inline-block; border-radius: var(--radius-pill); padding: 2px 10px;
  font-size: 11px; font-weight: 600; color: var(--accent);
  background: var(--accent-bg); border: 1px solid var(--accent-bg-strong);
}
.card h3 { margin: 0; font-size: 16px; color: var(--strong); }
.card .desc {
  margin: 0; color: var(--muted); font-size: 13px; line-height: 1.6;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.card .foot {
  display: flex; align-items: center; gap: 12px; margin-top: auto;
  padding-top: 10px; border-top: 1px solid var(--border-subtle);
  color: var(--muted); font-size: 12px;
}
.card .foot .author { display: flex; align-items: center; gap: 6px; }
.card .foot .author .dot { width: 18px; height: 18px; border-radius: 50%; background: var(--accent-bg-strong); display: inline-flex; align-items: center; justify-content: center; font-size: 10px; color: var(--accent); }
.card .foot .spacer { margin-left: auto; }
.card .foot .stat { display: inline-flex; align-items: center; gap: 4px; }

.empty { text-align: center; color: var(--muted); padding: 64px 0; }

/* list view tweaks */
.grid.list .card { flex-direction: row; align-items: center; flex-wrap: wrap; }
.grid.list .card .desc { -webkit-line-clamp: 1; flex: 1 1 100%; }
.grid.list .card .foot { border-top: none; padding-top: 0; margin-left: auto; margin-top: 0; }

/* ---- detail page ----------------------------------------------------- */
.detail { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 32px; align-items: start; }
.detail .main h1 { font-size: 28px; margin: 0 0 8px; color: var(--strong); letter-spacing: -.01em; }
.detail .lede { color: var(--muted); font-size: 15px; line-height: 1.65; margin: 0 0 14px; }
.detail .meta-row { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; color: var(--muted); font-size: 13px; padding: 12px 0; border-top: 1px solid var(--border-subtle); border-bottom: 1px solid var(--border-subtle); margin-bottom: 20px; }
.detail .meta-row .stat { display: inline-flex; align-items: center; gap: 5px; }
.section-title { font-size: 13px; text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 28px 0 12px; }

.prose { color: var(--text); font-size: 14.5px; line-height: 1.75; }
.prose h1, .prose h2, .prose h3 { color: var(--strong); line-height: 1.3; margin: 1.4em 0 .5em; }
.prose h1 { font-size: 20px; } .prose h2 { font-size: 17px; } .prose h3 { font-size: 15px; }
.prose p { margin: .7em 0; }
.prose ul, .prose ol { padding-left: 1.4em; margin: .6em 0; }
.prose li { margin: .3em 0; }
.prose code { background: var(--code-bg); border: 1px solid var(--border-subtle); border-radius: var(--radius-sm); padding: 1px 5px; font-size: 12.5px; color: var(--accent); }
.prose pre { background: var(--code-bg); border: 1px solid var(--border-subtle); border-radius: var(--radius-md); padding: 14px 16px; overflow-x: auto; }
.prose pre code { background: none; border: none; padding: 0; color: var(--text); font-size: 13px; }
.prose blockquote { border-left: 3px solid var(--border); margin: .8em 0; padding: .2em 0 .2em 14px; color: var(--muted); }

.filelist { display: flex; flex-direction: column; gap: 2px; }
.filelist .file { display: flex; align-items: center; gap: 8px; padding: 9px 12px; border: 1px solid var(--border-subtle); border-radius: var(--radius-md); font-size: 13px; }
.filelist .file .mono { color: var(--text); }

/* sidebar */
.side .box { background: var(--surface); border: 1px solid var(--border-subtle); border-radius: var(--radius-lg); padding: 16px; margin-bottom: 16px; }
.side .box h4 { margin: 0 0 12px; font-size: 13px; color: var(--strong); display: flex; align-items: center; gap: 6px; }
.install-block { position: relative; margin-bottom: 10px; }
.install-block .lbl { font-size: 11px; color: var(--muted); margin-bottom: 5px; display: flex; align-items: center; gap: 5px; }
.install-block pre {
  margin: 0; background: var(--code-bg); border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md); padding: 10px 40px 10px 12px; overflow-x: auto;
  font-family: "SF Mono", ui-monospace, Menlo, monospace; font-size: 12.5px; color: var(--text);
}
.install-note { font-size: 12px; color: var(--muted); margin: 4px 0 0; line-height: 1.5; }
.btn-dl {
  display: inline-flex; align-items: center; gap: 6px; width: 100%; justify-content: center;
  border: 1px solid var(--accent); background: var(--accent-bg); color: var(--accent);
  border-radius: var(--radius-md); padding: 9px 12px; font-size: 13px; font-weight: 600; cursor: pointer;
}
.btn-dl:hover { background: var(--accent-bg-strong); color: var(--accent); }
.info-row { display: flex; justify-content: space-between; gap: 10px; padding: 7px 0; font-size: 13px; border-bottom: 1px solid var(--border-subtle); }
.info-row:last-child { border-bottom: none; }
.info-row .k { color: var(--muted); } .info-row .v { color: var(--text); text-align: right; word-break: break-word; }
.info-row .v.mono { font-size: 11px; }

.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 12px; }

.back-link { display: inline-flex; align-items: center; gap: 6px; color: var(--muted); font-size: 13px; margin-bottom: 18px; }
.back-link:hover { color: var(--accent); }

footer.foot-bar { border-top: 1px solid var(--border-subtle); color: var(--muted); font-size: 12px; padding: 20px 24px; text-align: center; }
footer.foot-bar a { color: var(--muted); } footer.foot-bar a:hover { color: var(--accent); }

@media (max-width: 860px) {
  .detail { grid-template-columns: 1fr; }
  .side { order: -1; }
}