/* Xplorejoy — web development learning reference.
   Identity: dark code-editor, monospace, token colours, window chrome. */

:root {
  --bg: #0d1117;
  --panel: #161b22;
  --panel-2: #1c2128;
  --border: #30363d;
  --text: #c9d1d9;
  --muted: #8b949e;
  --blue: #58a6ff;
  --green: #7ee787;
  --purple: #d2a8ff;
  --amber: #ffa657;
  --red: #ff7b72;
  --mono: ui-monospace, "SFMono-Regular", "Cascadia Code", "JetBrains Mono", Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background:
    linear-gradient(transparent 0, transparent 0),
    radial-gradient(circle at 80% -10%, rgba(88, 166, 255, .12), transparent 40%),
    var(--bg);
  color: var(--text);
  font-family: var(--mono);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

.wrap { max-width: 1060px; margin: 0 auto; padding: 0 22px; }

/* ---- header ---- */
.site-head {
  border-bottom: 1px solid var(--border);
  background: rgba(13, 17, 23, .85);
  backdrop-filter: blur(6px);
  position: sticky; top: 0; z-index: 20;
}
.head-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 22px; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 8px; color: var(--text); }
.brand:hover { text-decoration: none; }
.brand-prompt { color: var(--green); font-weight: 700; }
.brand-word { font-weight: 700; letter-spacing: .02em; }
.cursor {
  display: inline-block; width: 9px; height: 18px; background: var(--green);
  animation: blink 1.1s steps(1) infinite; margin-left: 1px;
}
@keyframes blink { 50% { opacity: 0; } }
.nav { display: flex; gap: 6px; flex-wrap: wrap; }
.nav a {
  color: var(--muted); padding: 5px 11px; border-radius: 6px; font-size: 14px;
  border: 1px solid transparent;
}
.nav a:hover { color: var(--text); background: var(--panel); text-decoration: none; }
.nav a.is-on { color: var(--text); background: var(--panel); border-color: var(--border); }

/* ---- hero ---- */
.hero { padding: 46px 0 30px; border-bottom: 1px dashed var(--border); margin-bottom: 34px; }
.eyebrow { color: var(--muted); font-size: 14px; margin: 0 0 14px; }
.hero h1 { font-size: clamp(20px, 3.1vw, 30px); line-height: 1.45; margin: 0 0 18px; font-weight: 500; letter-spacing: -.01em; }
.tk-const, .tk-key { color: var(--purple); }
.tk-var { color: var(--text); }
.tk-op { color: var(--red); }
.tk-str { color: var(--green); }
.tk-com { color: var(--muted); }
.tk-err { color: var(--red); }
.hero-sub { color: var(--muted); max-width: 76ch; margin: 0; }

/* ---- chapters ---- */
.chapter { margin: 40px 0; }
.chapter-head { display: flex; align-items: baseline; justify-content: space-between; gap: 14px; flex-wrap: wrap; }
.chapter-title { display: flex; align-items: baseline; gap: 12px; font-size: 21px; margin: 0 0 6px; font-weight: 600; }
.chapter-no { color: var(--amber); font-size: 14px; font-weight: 700; }
.chapter-link { color: var(--muted); font-size: 13px; }
.chapter-blurb { color: var(--muted); max-width: 78ch; margin: 2px 0 18px; font-size: 15px; }

/* ---- file cards ---- */
.file-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 12px; }
.file-card {
  display: flex; flex-direction: column; gap: 9px;
  background: var(--panel); border: 1px solid var(--border); border-radius: 8px;
  padding: 15px 16px 14px; color: var(--text);
  transition: border-color .14s ease, transform .14s ease, background .14s ease;
}
.file-card:hover { border-color: var(--blue); background: var(--panel-2); transform: translateY(-2px); text-decoration: none; }
.file-num { color: var(--amber); font-size: 12px; letter-spacing: .08em; }
.file-name { font-size: 16.5px; font-weight: 600; line-height: 1.3; }
.file-tags { margin-top: auto; display: flex; gap: 6px; flex-wrap: wrap; }
.badge {
  font-size: 11.5px; padding: 3px 8px; border-radius: 999px;
  background: rgba(126, 231, 135, .12); color: var(--green); border: 1px solid rgba(126, 231, 135, .3);
}
.badge-area { background: rgba(210, 168, 255, .12); color: var(--purple); border-color: rgba(210, 168, 255, .3); }

/* ---- article / editor ---- */
.article { max-width: 880px; }
.breadcrumb { color: var(--muted); font-size: 13px; margin: 26px 0 14px; }
.breadcrumb a { color: var(--muted); }
.breadcrumb span { margin: 0 6px; color: var(--border); }

.editor { border: 1px solid var(--border); border-radius: 10px; overflow: hidden; background: var(--panel); margin-bottom: 40px; }
.editor-bar {
  display: flex; align-items: center; gap: 8px; padding: 10px 14px;
  background: var(--panel-2); border-bottom: 1px solid var(--border);
}
.dot { width: 11px; height: 11px; border-radius: 50%; display: inline-block; }
.dot-r { background: #ff5f56; } .dot-y { background: #ffbd2e; } .dot-g { background: #27c93f; }
.editor-path { margin-left: 12px; color: var(--muted); font-size: 12.5px; }
.editor-body { padding: 28px 30px 34px; }

.article h1 { font-size: clamp(23px, 3.6vw, 32px); line-height: 1.25; margin: 0 0 6px; letter-spacing: -.01em; }
.zh { display: block; font-size: 14px; color: var(--muted); font-weight: 400; margin-top: 8px; }

.manifest {
  margin: 22px 0 18px; padding: 15px 18px; font-size: 14px; line-height: 1.75;
  background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
  overflow-x: auto; color: var(--text);
}
.manifest code { font-family: var(--mono); }

.facts-table { width: 100%; border-collapse: collapse; margin: 0 0 30px; font-size: 14.5px; }
.facts-table th {
  text-align: left; color: var(--muted); font-weight: 400; padding: 9px 14px 9px 0;
  width: 34%; vertical-align: top; border-bottom: 1px dashed var(--border);
}
.facts-table td { padding: 9px 0; border-bottom: 1px dashed var(--border); color: var(--text); }
.facts-table tr:last-child th, .facts-table tr:last-child td { border-bottom: 0; }

.sec { margin: 30px 0; }
.sec h2 { display: flex; align-items: baseline; gap: 12px; font-size: 19px; margin: 0 0 12px; line-height: 1.35; font-weight: 600; }
.sec-no { color: var(--green); font-size: 13px; flex: none; }
.sec p { margin: 0 0 14px; color: #c9d1d9; }
.sec p:last-child { margin-bottom: 0; }

.related-nav { margin-top: 40px; padding-top: 24px; border-top: 1px dashed var(--border); }
.related-nav h2 { font-size: 15px; color: var(--muted); font-weight: 500; margin: 0 0 14px; }
.related { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 11px; }
.related li { display: flex; flex-direction: column; gap: 3px; padding: 11px 14px; border: 1px solid var(--border); border-radius: 7px; background: var(--bg); }
.related a { font-weight: 600; }
.related-soon { color: var(--muted); }
.related-meta { font-size: 12px; color: var(--muted); }

/* ---- directory / legal / 404 ---- */
.dir-head { margin: 10px 0 26px; }
.dir-head h1 { font-size: clamp(24px, 4vw, 34px); margin: 4px 0 10px; }
.dir-blurb { color: var(--muted); max-width: 76ch; margin: 0 0 10px; }
.dir-count { color: var(--amber); font-size: 13px; }
.legal { max-width: 820px; }
.legal h1 { font-size: clamp(22px, 3.6vw, 32px); margin: 6px 0 20px; }
.legal-body h2 { font-size: 17px; margin: 28px 0 10px; color: var(--green); font-weight: 600; }
.legal-body p { margin: 0 0 14px; color: var(--text); }
.notfound { max-width: 680px; padding: 60px 22px; }
.notfound h1 { font-size: 28px; margin: 18px 0 10px; }
.err { background: var(--panel); border: 1px solid var(--border); border-radius: 8px; padding: 16px 18px; font-size: 14px; }
.err code { font-family: var(--mono); }
.back { margin: 34px 0; font-size: 14px; }

/* ---- footer ---- */
.site-foot { border-top: 1px solid var(--border); margin-top: 50px; padding: 28px 0 48px; background: rgba(22, 27, 34, .4); }
.site-foot p { margin: 0 0 12px; color: var(--muted); font-size: 13.5px; }
.foot-links { display: flex; gap: 10px; flex-wrap: wrap; font-size: 13.5px; }
.foot-links span { color: var(--border); }
.foot-fine { font-size: 12.5px; color: #6e7681; margin-top: 14px; }

@media (max-width: 640px) {
  body { font-size: 15px; }
  .editor-body { padding: 22px 18px 28px; }
  .facts-table th { width: 40%; }
}