/* Soft Cards — design tokens per handoff */
:root {
  --bg: #faf9f5;
  --surface: #ffffff;
  --surface2: #f5f4ee;
  --fg: #2b2a27;
  --muted: #6b6862;
  --border: #e8e5dc;
  --accent: #c15f3c;
  --accent-ink: #c15f3c;
}
:root[data-theme="dark"] {
  --bg: #262421;
  --surface: #302e2b;
  --surface2: #37342f;
  --fg: #f3f1ea;
  --muted: #a8a49b;
  --border: #423f3a;
}
* { box-sizing: border-box; }
::selection { background: rgba(217, 119, 87, 0.22); }
input { outline: none; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Zen Kaku Gothic New", sans-serif;
  transition: background 0.2s ease, color 0.2s ease;
}
.mono { font-family: "JetBrains Mono", monospace; }
.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* header */
header.site {
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px 0; flex-wrap: wrap; gap: 12px;
}
.brand { display: flex; align-items: center; gap: 12px; text-decoration: none; color: var(--fg); }
.logo {
  width: 34px; height: 34px; border-radius: 10px; background: var(--accent);
  color: #fff; font-family: "JetBrains Mono", monospace; font-weight: 700; font-size: 15px;
  display: flex; align-items: center; justify-content: center;
}
.brand span { font-weight: 700; font-size: 17px; letter-spacing: -0.01em; }
.header-right { display: flex; align-items: center; gap: 8px; }
.pill {
  padding: 7px 14px; border-radius: 999px; font-size: 13px; cursor: pointer;
  color: var(--muted); background: none; border: none; font-family: inherit;
}
.pill.active { background: var(--accent); color: #fff; font-weight: 700; }
.pill:disabled { opacity: 0.45; cursor: default; }
.theme-toggle {
  width: 36px; height: 36px; margin-left: 8px; border-radius: 999px;
  border: 1px solid var(--border); background: var(--surface); color: var(--fg);
  cursor: pointer; font-size: 15px;
}
.nav-link { font-size: 13px; color: var(--muted); text-decoration: none; padding: 7px 10px; }
.nav-link:hover { color: var(--accent); }

/* hero */
.hero { padding: 48px 0 30px; text-align: center; }
.eyebrow {
  font-family: "JetBrains Mono", monospace; font-size: 12px;
  letter-spacing: 0.24em; color: var(--accent); margin-bottom: 14px;
}
.hero h1 { font-size: 40px; font-weight: 900; letter-spacing: -0.02em; line-height: 1.2; margin: 0; }
.hero p { font-size: 15px; color: var(--muted); margin: 12px 0 0; line-height: 1.7; }
.searchbar {
  max-width: 520px; margin: 26px auto 0; display: flex; align-items: center; gap: 12px;
  background: var(--surface); border: 1px solid var(--border); border-radius: 999px;
  padding: 13px 20px; box-shadow: 0 8px 22px -14px rgba(40, 30, 20, 0.25);
}
.searchbar .glass { color: var(--muted); font-size: 16px; }
.searchbar input {
  border: none; background: transparent; flex: 1; font-size: 14px;
  color: var(--fg); font-family: inherit;
}

/* chips */
.chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 9px; }
.chip {
  padding: 8px 16px; font-size: 13px; border-radius: 999px; cursor: pointer;
  background: var(--surface2); color: var(--muted); border: 1px solid var(--border);
  font-family: inherit;
}
.chip.active { background: var(--accent); color: #fff; border: 1px solid var(--accent); font-weight: 700; }

/* grid + cards */
.grid {
  padding: 24px 0 64px; display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px;
}
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
  padding: 22px; box-shadow: 0 1px 2px rgba(40, 30, 20, 0.04);
  display: flex; flex-direction: column; gap: 12px;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}
.card:hover {
  transform: translateY(-4px); border-color: var(--accent);
  box-shadow: 0 16px 32px -18px rgba(40, 30, 20, 0.35);
}
.card .meta { display: flex; align-items: center; gap: 8px; }
.card .dot { width: 9px; height: 9px; border-radius: 999px; flex: none; }
.card .cat { font-size: 12px; color: var(--muted); }
.card .kind {
  margin-left: auto; font-family: "JetBrains Mono", monospace; font-size: 10px;
  border: 1px solid var(--border); border-radius: 5px; padding: 2px 7px; color: var(--muted);
}
.card .name { font-family: "JetBrains Mono", monospace; font-weight: 700; font-size: 17px; word-break: break-all; }
.card .role { font-size: 14px; font-weight: 700; }
.card .desc { font-size: 13px; color: var(--muted); line-height: 1.7; }
.card .ex {
  border-top: 1px solid var(--border); padding-top: 12px;
  font-family: "JetBrains Mono", monospace; font-size: 12px; color: var(--accent-ink);
  white-space: pre-wrap; word-break: break-all;
}
.empty { text-align: center; color: var(--muted); padding: 40px 0 64px; font-size: 14px; grid-column: 1 / -1; }

/* modal */
.card { cursor: pointer; }
.overlay {
  position: fixed; inset: 0; background: rgba(20, 15, 10, 0.45);
  display: flex; align-items: center; justify-content: center; padding: 24px;
  z-index: 50; backdrop-filter: blur(3px);
}
.modal {
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
  max-width: 560px; width: 100%; max-height: 85vh; overflow-y: auto;
  box-shadow: 0 24px 60px -20px rgba(40, 30, 20, 0.5);
}
.modal-head {
  display: flex; align-items: center; gap: 10px; padding: 20px 24px;
  border-bottom: 1px solid var(--border);
}
.modal-head .name { font-family: "JetBrains Mono", monospace; font-weight: 700; font-size: 18px; word-break: break-all; }
.modal-head .kind { margin-left: auto; }
.modal-close {
  border: none; background: none; color: var(--muted); font-size: 20px;
  cursor: pointer; padding: 4px 8px; flex: none;
}
.modal-body { padding: 20px 24px 24px; }
.modal-body .section-label {
  font-family: "JetBrains Mono", monospace; font-size: 11px; letter-spacing: 0.18em;
  color: var(--accent); margin: 16px 0 6px;
}
.modal-body .section-label:first-child { margin-top: 0; }
.modal-body .role { font-size: 15px; font-weight: 700; }
.modal-body .desc { font-size: 14px; color: var(--muted); line-height: 1.8; }
.copyrow {
  display: flex; align-items: center; gap: 10px;
  background: var(--surface2); border: 1px solid var(--border); border-radius: 10px;
  padding: 12px 14px;
}
.copyrow code {
  font-family: "JetBrains Mono", monospace; font-size: 13px; color: var(--accent-ink);
  flex: 1; white-space: pre-wrap; word-break: break-all;
}
.copy-btn {
  flex: none; border: 1px solid var(--border); background: var(--surface);
  color: var(--fg); border-radius: 8px; padding: 6px 12px; font-size: 12px;
  font-family: inherit; cursor: pointer; transition: all 0.15s ease;
}
.copy-btn:hover { border-color: var(--accent); color: var(--accent); }
.copy-btn.copied { background: var(--accent); border-color: var(--accent); color: #fff; }

/* course page */
.course-layout { display: grid; grid-template-columns: 240px 1fr; gap: 32px; padding: 12px 0 64px; align-items: start; }
@media (max-width: 800px) { .course-layout { grid-template-columns: 1fr; } }
.toc {
  position: sticky; top: 24px; background: var(--surface); border: 1px solid var(--border);
  border-radius: 16px; padding: 18px;
}
.toc .toc-title { font-size: 12px; letter-spacing: 0.18em; color: var(--accent); font-family: "JetBrains Mono", monospace; margin-bottom: 12px; }
.toc a { display: block; font-size: 13px; color: var(--muted); text-decoration: none; padding: 7px 8px; border-radius: 8px; line-height: 1.5; }
.toc a:hover { background: var(--surface2); color: var(--fg); }
.chapter {
  background: var(--surface); border: 1px solid var(--border); border-radius: 16px;
  padding: 28px; margin-bottom: 20px; scroll-margin-top: 24px;
}
.chapter .ch-num { font-family: "JetBrains Mono", monospace; font-size: 12px; letter-spacing: 0.2em; color: var(--accent); }
.chapter h2 { font-size: 24px; font-weight: 900; margin: 8px 0 4px; letter-spacing: -0.01em; }
.chapter .ch-lead { font-size: 14px; color: var(--muted); line-height: 1.8; margin: 0 0 8px; }
.step { border-top: 1px solid var(--border); padding-top: 18px; margin-top: 18px; }
.step h3 { font-size: 16px; font-weight: 700; margin: 0 0 8px; }
.step p { font-size: 14px; color: var(--muted); line-height: 1.9; margin: 0 0 10px; }
.codeblock {
  background: var(--surface2); border: 1px solid var(--border); border-radius: 10px;
  padding: 14px 16px; font-family: "JetBrains Mono", monospace; font-size: 13px;
  line-height: 1.7; overflow-x: auto; white-space: pre; color: var(--fg);
  position: relative;
}
.codeblock .copy-btn {
  position: absolute; top: 8px; right: 8px; font-family: "Zen Kaku Gothic New", sans-serif;
}
.tip {
  border-left: 3px solid var(--accent); background: var(--surface2);
  border-radius: 0 10px 10px 0; padding: 12px 16px; font-size: 13px;
  color: var(--muted); line-height: 1.8; margin-top: 10px;
}
.tip b { color: var(--accent); }