/* Hub-only styles: homepage + ap-map. Not loaded by simulator or ascii tool. */

:root {
  --bg:        #0a0e1a;
  --green:     #00ff9d;
  --blue:      #00b4ff;
  --red:       #ff4d6d;
  --text:      #e8eaf6;
  --muted:     #7b82a8;
  --gray-muted:#3a3f5c;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;
  --font-ui:   'Outfit', system-ui, sans-serif;
  --radius:    6px;
  --radius-lg: 10px;
}

*, *::before, *::after { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-ui);
  overflow: auto;
}

body {
  padding-top: 40px; /* hub nav height */
}

a { color: inherit; }

/* ── Hub wrapper ──────────────────────────────────────────── */

.hub-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 3rem 1.5rem 4rem;
}

/* ── Header / Hero ───────────────────────────────────────── */

.hub-header {
  text-align: center;
  padding: 3rem 0 2.5rem;
  border-bottom: 1px solid var(--gray-muted);
  margin-bottom: 3rem;
}

.hub-header h1 {
  font-family: var(--font-mono);
  font-size: clamp(2.2rem, 6vw, 4rem);
  font-weight: 700;
  color: var(--green);
  text-shadow: 0 0 20px #00ff9d55, 0 0 40px #00ff9d22;
  letter-spacing: 0.12em;
  margin: 0 0 0.5rem;
}

.hub-school {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--muted);
  border: 1px solid var(--gray-muted);
  border-radius: 999px;
  padding: 0.2rem 0.8rem;
  margin-bottom: 1rem;
  text-transform: uppercase;
}

.hub-tagline {
  font-size: clamp(0.9rem, 2.5vw, 1.1rem);
  color: var(--muted);
  margin: 0.5rem 0 1.5rem;
}

.hub-yt-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--muted);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: color 0.15s;
}
.hub-yt-link:hover { color: var(--text); }

/* ── Tool Cards ──────────────────────────────────────────── */

.tools-section h2 {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--muted);
  text-transform: uppercase;
  margin: 0 0 1.25rem;
}

.tools-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: 1fr;
}

@media (min-width: 700px) {
  .tools-grid { grid-template-columns: 1fr 1fr; }
}

.tool-card {
  display: block;
  background: #0d1120;
  border: 1px solid var(--gray-muted);
  border-left: 3px solid var(--card-accent, var(--muted));
  border-radius: var(--radius-lg);
  padding: 1.4rem 1.25rem 1.25rem;
  text-decoration: none;
  color: var(--text);
  transition: box-shadow 0.2s, border-color 0.2s, transform 0.15s;
  cursor: pointer;
}

.tool-card[data-color="green"] { --card-accent: var(--green); }
.tool-card[data-color="blue"]  { --card-accent: var(--blue); }

.tool-card:hover {
  box-shadow: 0 0 20px color-mix(in srgb, var(--card-accent) 25%, transparent);
  transform: translateY(-1px);
}

.tool-card[data-status="coming-soon"] {
  opacity: 0.5;
  cursor: default;
  pointer-events: none;
}

.card-icon {
  font-family: var(--font-mono);
  font-size: 1.4rem;
  color: var(--card-accent, var(--muted));
  margin-bottom: 0.6rem;
  line-height: 1;
}

.card-unit {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.card-title {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin: 0 0 0.35rem;
}

.card-tagline {
  font-size: 0.85rem;
  color: var(--card-accent, var(--muted));
  margin: 0 0 0.6rem;
  font-style: italic;
}

.card-desc {
  font-size: 0.82rem;
  color: var(--muted);
  line-height: 1.5;
  margin: 0 0 1rem;
}

.card-concepts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
}

/* ── EK / Concept Badges ─────────────────────────────────── */

.ek-badge {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  padding: 0.18rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--gray-muted);
  background: #111827;
  color: var(--muted);
  white-space: nowrap;
}

.ek-badge--covered {
  border-color: var(--card-accent, var(--green));
  color: var(--card-accent, var(--green));
  background: color-mix(in srgb, var(--card-accent, var(--green)) 10%, transparent);
  cursor: default;
}

a.ek-badge--covered {
  cursor: pointer;
  text-decoration: none;
}
a.ek-badge--covered:hover {
  background: color-mix(in srgb, var(--card-accent, var(--green)) 20%, transparent);
}

/* ── AP Map Accordion ────────────────────────────────────── */

.page-header {
  padding: 2.5rem 0 1.5rem;
  border-bottom: 1px solid var(--gray-muted);
  margin-bottom: 2rem;
}

.page-header h1 {
  font-family: var(--font-mono);
  font-size: clamp(1.1rem, 3vw, 1.5rem);
  font-weight: 700;
  color: var(--green);
  margin: 0 0 0.4rem;
}

.page-header p {
  font-size: 0.85rem;
  color: var(--muted);
  margin: 0;
}

.ap-accordion { display: flex; flex-direction: column; gap: 0.5rem; }

details.bi-section {
  background: #0d1120;
  border: 1px solid var(--gray-muted);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

details.bi-section[open] {
  border-color: #4a5080;
}

details.bi-section > summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.9rem 1.1rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  user-select: none;
}

details.bi-section > summary::-webkit-details-marker { display: none; }

details.bi-section > summary::before {
  content: '▶';
  font-size: 0.55rem;
  color: var(--muted);
  transition: transform 0.15s;
  flex-shrink: 0;
}

details.bi-section[open] > summary::before {
  transform: rotate(90deg);
}

.bi-code {
  color: var(--green);
  font-weight: 700;
  letter-spacing: 0.05em;
  flex-shrink: 0;
}

.bi-title {
  color: var(--text);
  flex: 1;
}

.bi-tool-badges {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.tool-badge {
  font-size: 0.58rem;
  padding: 0.12rem 0.45rem;
  border-radius: 999px;
  border: 1px solid;
  white-space: nowrap;
}

.tool-badge--green {
  color: var(--green);
  border-color: var(--green);
  background: #00ff9d11;
}

.tool-badge--blue {
  color: var(--blue);
  border-color: var(--blue);
  background: #00b4ff11;
}

.bi-eks {
  padding: 0.75rem 1.1rem 1rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  border-top: 1px solid var(--gray-muted);
}

.no-eks {
  font-size: 0.8rem;
  color: var(--muted);
  margin: 0;
}

/* ── Hub section wrappers ────────────────────────────────── */

main {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.hub-section {
  margin-bottom: 3rem;
}

.hub-byline {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  color: var(--muted);
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

/* Aliases: tool-* → card-* for homepage JS */
.tool-icon   { font-family: var(--font-mono); font-size: 1.4rem; color: var(--card-accent, var(--muted)); margin-bottom: 0.6rem; line-height: 1; }
.tool-unit   { font-family: var(--font-mono); font-size: 0.62rem; letter-spacing: 0.1em; color: var(--muted); text-transform: uppercase; margin-bottom: 0.4rem; }
.tool-title  { font-family: var(--font-mono); font-size: 1rem; font-weight: 700; color: var(--text); margin: 0 0 0.35rem; }
.tool-tagline{ font-size: 0.85rem; color: var(--card-accent, var(--muted)); margin: 0 0 0.6rem; font-style: italic; }
.tool-desc   { font-size: 0.82rem; color: var(--muted); line-height: 1.5; margin: 0 0 1rem; }
.tool-concepts{ display: flex; flex-wrap: wrap; gap: 0.35rem; }

/* ── AP Map EK list ──────────────────────────────────────── */

.bi-coverage {
  font-size: 0.62rem;
  color: var(--muted);
  margin-left: auto;
}

.ek-list {
  padding: 0.5rem 1.1rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  border-top: 1px solid var(--gray-muted);
}

.ek-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.78rem;
}

.ek-row .ek-code {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  min-width: 8rem;
  flex-shrink: 0;
}

.ek-row--covered .ek-code {
  color: var(--text);
}

.ek-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.ek-tool-badge {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--gray-muted);
  color: var(--muted);
}

.ek-tool-badge[data-color="green"] {
  color: var(--green);
  border-color: var(--green);
  background: #00ff9d11;
}

.ek-tool-badge[data-color="blue"] {
  color: var(--blue);
  border-color: var(--blue);
  background: #00b4ff11;
}

.ek-uncovered {
  font-size: 0.65rem;
  color: var(--gray-muted);
  font-style: italic;
}

.bi-empty {
  padding: 0.75rem 1.1rem;
  font-size: 0.8rem;
  color: var(--muted);
  border-top: 1px solid var(--gray-muted);
}

/* ── Footer ──────────────────────────────────────────────── */

.hub-footer {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--gray-muted);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--muted);
  text-align: center;
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

.hub-footer a {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.15s;
}
.hub-footer a:hover { color: var(--text); }