/* =====================================================================
   Algorithm Forge — hub pages (landing, path, gallery, cheat sheet, quiz)
   Builds on forge.css tokens; loaded after it.
   ===================================================================== */
.section { margin-top: 44px; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.section-head h2 { margin: 2px 0 0; font-size: 1.5rem; }
.section-head p { margin: 4px 0 0; color: var(--ink-2); max-width: 720px; }
.auto-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); }
.auto-grid > * { min-width: 0; }

/* glyph illustrations */
.glyph { display: block; width: 100%; height: auto; }
.glyph-box { background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px; padding: 8px 10px; margin-bottom: 12px; }

/* sim cards */
.sim-card { display: flex; flex-direction: column; height: 100%; }
.sim-card h3 { font-size: 1rem; margin: 0 0 4px; }
.sim-card p { flex: 1; }
.sim-card .meta { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }
@media (max-width: 640px) {
  .sim-card { display: grid; grid-template-columns: 96px minmax(0, 1fr); column-gap: 12px; padding: 12px; }
  .sim-card .glyph-box { grid-row: 1 / span 4; margin: 0; padding: 4px 5px; align-self: start; }
  .sim-card > :not(.glyph-box) { grid-column: 2; }
  .sim-card p { font-size: .86rem; }
  .sim-card .meta { margin-top: 6px; }
  .chipset.scroll-sm { flex-wrap: nowrap; overflow-x: auto; padding-bottom: 4px; scrollbar-width: thin; }
  .chipset.scroll-sm .chip { flex: none; }
}

/* chapter group header */
.ch-group { margin-top: 34px; scroll-margin-top: 80px; }
.ch-group-head { display: flex; gap: 14px; align-items: baseline; flex-wrap: wrap; margin-bottom: 12px; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.ch-group-head h2 { margin: 0; font-size: 1.2rem; }
.ch-num { font-family: var(--mono); font-weight: 800; color: var(--ember); }
.ch-group-head .links { margin-left: auto; display: flex; gap: 12px; font-size: 0.85rem; font-weight: 600; }
.ch-group-head .hook { flex-basis: 100%; margin: 0; color: var(--ink-2); font-size: 0.92rem; }

/* filter bar */
.filterbar { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.filterbar input[type="search"] {
  flex: 1 1 240px; min-width: 0; background: var(--bg-2); color: var(--ink); border: 1px solid var(--line-2);
  border-radius: 10px; padding: 9px 12px; font: 500 0.95rem var(--font);
}
.chipset { display: flex; gap: 6px; flex-wrap: wrap; }
button.chip { cursor: pointer; font-family: var(--font); }
button.chip:hover { border-color: var(--ember); }
button.chip.on { background: var(--ember); color: #1b0f05; border-color: var(--ember); }
.empty { text-align: center; color: var(--muted); padding: 40px 10px; }

/* progress bar */
.bar { height: 8px; background: var(--bg-2); border: 1px solid var(--line); border-radius: 99px; overflow: hidden; }
.bar > i { display: block; height: 100%; background: linear-gradient(90deg, var(--ember), var(--ember-2)); border-radius: 99px; transition: width .4s ease; }

/* stat tiles */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 10px; }
.stat { background: var(--bg-2); border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; }
.stat .k { font-size: 0.7rem; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); font-weight: 700; }
.stat .v { font-family: var(--mono); font-size: 1.5rem; font-weight: 800; line-height: 1.2; }
.stat .v small { font-size: 0.8rem; color: var(--muted); font-weight: 600; }

/* level colors as variables for SVG use */
:root { --lv0: #3ddc97; --lv1: #ff7ad9; --lv2: #5ab0ff; --lv3: #c38bff; --lv4: #ff8a3d; --lv5: #ff5d73; --lv6: #ffd24d; --lv7: #4de1ff; }
:root[data-theme="light"] { --lv0: #12a26b; --lv1: #b8318f; --lv2: #1f6fd1; --lv3: #8a4fd6; --lv4: #d9621a; --lv5: #e23a55; --lv6: #a77b00; --lv7: #0b8fb3; }
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) { --lv0: #12a26b; --lv1: #b8318f; --lv2: #1f6fd1; --lv3: #8a4fd6; --lv4: #d9621a; --lv5: #e23a55; --lv6: #a77b00; --lv7: #0b8fb3; }
}
/* Atlas stage colours (same heat ramp as docs/atlas/atlas.css: steel first idea → gold research frontier) */
:root { --st-first: #8d9cb6; --st-classic: #5ab0ff; --st-advanced: #c38bff; --st-production: #ff8a3d; --st-frontier: #ffd24d; }
:root[data-theme="light"] { --st-first: #66768f; --st-classic: #1f6fd1; --st-advanced: #8a4fd6; --st-production: #dc5f12; --st-frontier: #c48a00; }
@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) { --st-first: #66768f; --st-classic: #1f6fd1; --st-advanced: #8a4fd6; --st-production: #dc5f12; --st-frontier: #c48a00; }
}
.lv-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; vertical-align: 0; }

.linkrow { display: flex; gap: 14px; flex-wrap: wrap; font-weight: 600; font-size: 0.9rem; }
.kbdhint { font-size: 0.8rem; color: var(--muted); }

@media print {
  .topbar, footer.foot, .no-print { display: none !important; }
  body { background: #fff; color: #000; }
}