/* GameHub /learn — generated by scripts/build-learn.js. Do not edit by hand.
   Fonts are SELF-HOSTED (OFL, copied into fonts/) — no third-party requests,
   no Google Fonts: the project is GDPR-conscious. */

@font-face {
  font-family: "Press Start 2P";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/press-start-2p-latin-400.woff2") format("woff2");
}
@font-face {
  font-family: "Chakra Petch";
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url("fonts/chakra-petch-latin-400.woff2") format("woff2");
}
@font-face {
  font-family: "Chakra Petch";
  font-style: normal;
  font-weight: 600;
  font-display: swap;
  src: url("fonts/chakra-petch-latin-600.woff2") format("woff2");
}
@font-face {
  font-family: "Chakra Petch";
  font-style: normal;
  font-weight: 700;
  font-display: swap;
  src: url("fonts/chakra-petch-latin-700.woff2") format("woff2");
}

:root {
  --bg: #070812;
  --panel: #101323;
  --panel-2: #0b0d1a;
  --text: #f4f7ff;
  --muted: #9299b8;
  --cyan: #00f5ff;
  --purple: #9b5cff;
  --pink: #ff3cac;
  --border: rgba(255, 255, 255, 0.1);
  --sidebar-w: 288px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 82% 8%, rgba(155, 92, 255, 0.16), transparent 32%),
    radial-gradient(circle at 8% 34%, rgba(0, 245, 255, 0.09), transparent 30%),
    var(--bg);
  font-family: "Chakra Petch", "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.7;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.1;
  z-index: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(to bottom, black, transparent 80%);
}

a { color: var(--cyan); text-decoration: none; }
a:hover { text-decoration: underline; }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
}
.skip-link:focus {
  left: 12px;
  top: 12px;
  z-index: 20;
  padding: 10px 14px;
  background: var(--cyan);
  color: var(--bg);
  border-radius: 6px;
}

.layout {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
  gap: 0;
  max-width: 1440px;
  margin: 0 auto;
}

/* ---------------- sidebar ---------------- */

.sidebar {
  position: sticky;
  top: 0;
  align-self: start;
  height: 100vh;
  overflow-y: auto;
  padding: 30px 22px 40px;
  border-right: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(16, 19, 35, 0.85), rgba(7, 8, 18, 0.85));
  backdrop-filter: blur(8px);
}

.brand {
  display: inline-block;
  font-family: "Press Start 2P", monospace;
  font-size: 0.9rem;
  letter-spacing: 1px;
  color: var(--text);
}
.brand span { color: var(--cyan); }
.brand:hover { text-decoration: none; }

.sidebar-sub {
  margin: 8px 0 22px;
  font-family: "Press Start 2P", monospace;
  font-size: 0.55rem;
  letter-spacing: 2px;
  color: var(--pink);
}

.nav ul { list-style: none; margin: 0; padding: 0; }
.nav li { margin-bottom: 6px; }

.nav a {
  display: block;
  padding: 9px 12px;
  border: 1px solid transparent;
  border-radius: 8px;
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.35;
  transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease;
}
.nav a:hover {
  color: var(--text);
  border-color: var(--border);
  background: rgba(255, 255, 255, 0.03);
  text-decoration: none;
}
.nav a.is-active {
  color: var(--cyan);
  border-color: rgba(0, 245, 255, 0.4);
  background: rgba(0, 245, 255, 0.06);
}
.nav-kind {
  display: block;
  margin-bottom: 3px;
  font-family: "Press Start 2P", monospace;
  font-size: 0.44rem;
  letter-spacing: 1px;
  color: var(--purple);
}
.nav a.is-active .nav-kind { color: var(--cyan); }

.sidebar-foot {
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.btn {
  display: inline-block;
  text-align: center;
  padding: 11px 14px;
  border-radius: 7px;
  font-family: "Press Start 2P", monospace;
  font-size: 0.56rem;
  letter-spacing: 1px;
  line-height: 1.6;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn-primary {
  color: #05060d;
  background: var(--cyan);
  box-shadow: 0 0 22px rgba(0, 245, 255, 0.25);
}
.btn-primary:hover { box-shadow: 0 0 32px rgba(0, 245, 255, 0.55); }
.btn-ghost {
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: var(--purple); }

/* ---------------- content ---------------- */

.content {
  padding: 46px clamp(20px, 5vw, 68px) 90px;
  min-width: 0;
}

.hero-eyebrow {
  font-family: "Press Start 2P", monospace;
  font-size: 0.6rem;
  letter-spacing: 3px;
  color: var(--cyan);
  margin: 0 0 14px;
}

.hero-title {
  font-family: "Chakra Petch", sans-serif;
  font-weight: 700;
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  line-height: 1;
  letter-spacing: -2px;
  margin: 0 0 18px;
}
.hero-title span {
  display: block;
  color: transparent;
  -webkit-text-stroke: 1px var(--cyan);
  text-shadow: 0 0 30px rgba(0, 245, 255, 0.25);
}
.hero-lede { max-width: 62ch; color: var(--muted); margin: 0 0 26px; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 20px; }
.hero-actions .btn { padding: 13px 18px; font-size: 0.6rem; }

.doc-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  margin-bottom: 26px;
}
.chip {
  font-family: "Press Start 2P", monospace;
  font-size: 0.48rem;
  letter-spacing: 1px;
  padding: 7px 11px;
  border: 1px solid var(--border);
  border-radius: 5px;
  color: var(--muted);
}
.chip-source { color: var(--purple); border-color: rgba(155, 92, 255, 0.4); }

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
  margin: 8px 0 0;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 22px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.012));
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.card:hover {
  transform: translateY(-6px);
  border-color: var(--cyan);
  box-shadow: 0 0 32px rgba(0, 245, 255, 0.13);
}
.card:hover a { text-decoration: none; }
.card-kind {
  font-family: "Press Start 2P", monospace;
  font-size: 0.5rem;
  letter-spacing: 2px;
  color: var(--pink);
}
.card h3 {
  margin: 0;
  font-family: "Chakra Petch", sans-serif;
  font-weight: 700;
  font-size: 1.2rem;
  line-height: 1.25;
  color: var(--text);
}
.card p { margin: 0; color: var(--muted); font-size: 0.88rem; line-height: 1.6; }
.card-open {
  margin-top: auto;
  font-family: "Press Start 2P", monospace;
  font-size: 0.5rem;
  letter-spacing: 1px;
  color: var(--cyan);
}

.section-band {
  margin: 54px 0 0;
  padding: 30px;
  border: 1px solid rgba(0, 245, 255, 0.18);
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(0, 245, 255, 0.06), rgba(155, 92, 255, 0.05));
}
.section-band h2 {
  margin: 0 0 10px;
  font-family: "Chakra Petch", sans-serif;
  font-weight: 700;
  font-size: 1.6rem;
}
.section-band p { margin: 0 0 18px; color: var(--muted); max-width: 70ch; }

/* ---------------- rendered markdown ---------------- */

.md > *:first-child { margin-top: 0; }

.md h1, .md h2, .md h3, .md h4, .md h5, .md h6 {
  font-family: "Chakra Petch", sans-serif;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
  scroll-margin-top: 20px;
}
.md h1 {
  font-size: clamp(2rem, 4.6vw, 3.2rem);
  letter-spacing: -1px;
  margin: 0 0 22px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--border);
}
.md h2 {
  font-size: clamp(1.5rem, 3vw, 2.05rem);
  margin: 46px 0 16px;
  padding-left: 14px;
  border-left: 4px solid var(--cyan);
}
.md h3 { font-size: 1.3rem; margin: 32px 0 12px; color: var(--cyan); }
.md h4 { font-size: 1.08rem; margin: 26px 0 10px; }
.md p { margin: 0 0 18px; }
.md strong { color: #ffffff; }
.md em { color: #dfe4ff; }
.md del { color: var(--muted); }

.md a { border-bottom: 1px dashed rgba(0, 245, 255, 0.5); }
.md a:hover { border-bottom-style: solid; }

.md img { max-width: 100%; height: auto; vertical-align: middle; }

.md .ext-img {
  display: inline-block;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.72em;
  letter-spacing: 0.5px;
  padding: 2px 8px;
  margin: 2px 4px 2px 0;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--panel-2);
  color: var(--muted);
}

.md ul, .md ol { margin: 0 0 18px; padding-left: 26px; }
.md li { margin-bottom: 8px; }
.md li > ul, .md li > ol { margin-top: 8px; }

.md code {
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.86em;
  padding: 2px 6px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--panel-2);
  color: #ffd9f4;
}

.md pre {
  margin: 0 0 22px;
  padding: 18px 20px;
  overflow-x: auto;
  border: 1px solid var(--border);
  border-left: 4px solid var(--purple);
  border-radius: 10px;
  background: var(--panel-2);
}
.md pre code {
  padding: 0;
  border: 0;
  background: none;
  color: #d7e3ff;
  font-size: 0.85rem;
  line-height: 1.6;
}

.md blockquote {
  margin: 0 0 22px;
  padding: 16px 20px;
  border-left: 4px solid var(--pink);
  border-radius: 0 10px 10px 0;
  background: rgba(255, 60, 172, 0.06);
  color: #e9dcff;
}
.md blockquote p:last-child { margin-bottom: 0; }

.md hr { border: 0; border-top: 1px solid var(--border); margin: 40px 0; }

.table-wrap {
  overflow-x: auto;
  margin: 0 0 24px;
  border: 1px solid var(--border);
  border-radius: 10px;
}
.md table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.md th, .md td {
  padding: 11px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border);
}
.md thead th {
  font-family: "Press Start 2P", monospace;
  font-size: 0.5rem;
  letter-spacing: 1px;
  color: var(--cyan);
  background: var(--panel);
  white-space: nowrap;
}
.md tbody tr:nth-child(even) { background: rgba(255, 255, 255, 0.02); }
.md tbody tr:last-child td { border-bottom: 0; }
.md td code { white-space: nowrap; }

.page-footer {
  margin-top: 70px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.82rem;
}

/* ---------------- responsive ---------------- */

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar {
    position: static;
    height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--border);
  }
  .content { padding-top: 30px; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
}