/* ============================================================
   Web Design Lab — static technique / category page styles
   (self-contained; used by build-static.mjs generated pages)
   ============================================================ */
:root {
  --bg: #0b0d12; --bg-2: #11141c;
  --surface: rgba(255,255,255,.04); --surface-2: rgba(255,255,255,.07);
  --border: rgba(255,255,255,.10); --border-strong: rgba(255,255,255,.18);
  --text: #eef1f7; --muted: #97a0b3; --muted-2: #6b7488;
  --accent: #7c5cff; --accent-2: #2bd1c4; --accent-3: #ff5c93;
  --ring: rgba(124,92,255,.55); --radius: 16px;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
  --sans: 'Inter','Noto Sans JP', system-ui, -apple-system, sans-serif;
  --maxw: 1080px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 78px; }
body {
  margin: 0; font-family: var(--sans); color: var(--text); background: var(--bg);
  line-height: 1.7; -webkit-font-smoothing: antialiased;
}
body::before {
  content: ""; position: fixed; inset: -20vmax; z-index: -2;
  background:
    radial-gradient(40vmax 40vmax at 12% 8%, rgba(124,92,255,.16), transparent 60%),
    radial-gradient(38vmax 38vmax at 88% 12%, rgba(43,209,196,.12), transparent 60%);
}
a { color: inherit; text-decoration: none; }
::selection { background: var(--ring); color: #fff; }

.site-header {
  position: sticky; top: 0; z-index: 30;
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--bg) 62%, transparent);
  border-bottom: 1px solid var(--border);
}
.site-header .inner {
  max-width: var(--maxw); margin: 0 auto; padding: 14px 20px;
  display: flex; align-items: center; gap: 14px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.brand .mark {
  width: 24px; height: 24px; border-radius: 7px;
  background: conic-gradient(from 180deg, var(--accent), var(--accent-2), var(--accent-3), var(--accent));
}
.brand b { color: var(--accent-2); }
.site-header .spacer { flex: 1; }
.site-header .home-link {
  font-size: 13.5px; font-weight: 600; color: var(--muted);
  border: 1px solid var(--border); border-radius: 999px; padding: 7px 14px;
}
.site-header .home-link:hover { color: var(--text); border-color: var(--border-strong); }

.wrap { max-width: var(--maxw); margin: 0 auto; padding: 28px 20px 70px; }

.breadcrumb { font-size: 13px; color: var(--muted); margin: 4px 0 18px; }
.breadcrumb a:hover { color: var(--text); }
.breadcrumb span { opacity: .5; margin: 0 7px; }

/* in-page table of contents */
.page-toc { display: flex; flex-wrap: wrap; gap: 8px; margin: 4px 0 30px; padding: 14px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.page-toc a { font: 600 13px var(--sans); color: var(--muted); border: 1px solid var(--border); border-radius: 999px; padding: 6px 15px; transition: color .15s, border-color .15s, background .15s, transform .12s; }
.page-toc a:hover { color: var(--text); border-color: var(--border-strong); background: var(--surface); transform: translateY(-1px); }

.hd h1 { font-size: clamp(26px, 5vw, 40px); line-height: 1.15; margin: 0 0 12px; letter-spacing: -.01em; }
.hd .lead { color: var(--muted); font-size: 16px; max-width: 70ch; margin: 0 0 16px; }
.meta-row { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 8px; }
.cat-chip {
  font: 600 12px var(--mono); color: var(--accent-2);
  border: 1px solid var(--border); border-radius: 999px; padding: 5px 12px;
}
.cat-chip:hover { border-color: var(--border-strong); }
.badge-diff { font: 600 12px var(--sans); padding: 4px 11px; border-radius: 999px; border: 1px solid var(--border); }
.diff-初級 { color: #5fd38a; border-color: rgba(95,211,138,.4); }
.diff-中級 { color: #ffc45f; border-color: rgba(255,196,95,.4); }
.diff-上級 { color: #ff7b9c; border-color: rgba(255,123,156,.4); }
.tags { display: flex; gap: 7px; flex-wrap: wrap; margin: 14px 0 4px; }
.tag { font: 500 12px var(--mono); color: var(--muted); border: 1px solid var(--border); border-radius: 6px; padding: 3px 9px; }

h2.sec { font-size: 19px; margin: 38px 0 14px; display: flex; align-items: center; gap: 10px; }
h2.sec::before { content: ""; width: 4px; height: 18px; border-radius: 3px; background: linear-gradient(var(--accent), var(--accent-3)); }

.demo-stage {
  position: relative; border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; background:
    repeating-conic-gradient(rgba(127,127,127,.06) 0 25%, transparent 0 50%) 0 0 / 22px 22px, var(--surface);
}
.demo-stage iframe { width: 100%; height: 460px; border: 0; display: block; background: #fff; }
.demo-actions { display: flex; gap: 8px; margin-top: 12px; }
.btn {
  font: 600 13.5px var(--sans); cursor: pointer; border-radius: 10px; padding: 9px 15px;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  transition: border-color .15s, background .15s, transform .12s;
}
.btn:hover { border-color: var(--border-strong); background: var(--surface-2); transform: translateY(-1px); }
.btn.primary { color: #fff; background: linear-gradient(100deg, var(--accent), var(--accent-3)); border-color: transparent; }

.code-block { position: relative; margin: 0 0 16px; }
.code-block .label {
  display: inline-block; font: 700 12px var(--mono); color: var(--accent-2);
  letter-spacing: .08em; margin: 0 0 6px;
}
.code-block pre {
  margin: 0; border: 1px solid var(--border); border-radius: 12px; overflow: auto; background: #0c0f17;
}
.code-block code { font: 13px/1.65 var(--mono); padding: 16px 18px; display: block; background: transparent !important; }
.copy {
  position: absolute; top: 30px; right: 12px; z-index: 2;
  font: 600 12px var(--sans); color: var(--text); cursor: pointer;
  border: 1px solid var(--border-strong); background: var(--surface-2); border-radius: 8px; padding: 5px 11px;
}
.copy:hover { background: var(--accent); color: #fff; border-color: transparent; }
.copy.done { background: var(--accent-2); color: #04201d; }

.ai-box { border: 1px solid var(--border-strong); border-radius: 14px; background: var(--surface); padding: 4px 4px 0; }
.ai-box .ai-head { display: flex; align-items: center; gap: 10px; padding: 12px 14px 8px; }
.ai-box .ai-head b { font-size: 14px; }
.ai-box .ai-head .hint { color: var(--muted); font-size: 12.5px; }
.ai-box pre { margin: 0; border-radius: 0 0 12px 12px; }
.ai-box code { white-space: pre-wrap; word-break: break-word; }

.related { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.related a {
  border: 1px solid var(--border); border-radius: 12px; padding: 14px; background: var(--surface);
  transition: border-color .15s, transform .15s, background .15s;
}
.related a:hover { border-color: var(--border-strong); transform: translateY(-3px); background: var(--surface-2); }
.related .r-cat { font: 600 11px var(--mono); color: var(--accent-2); }
.related .r-title { font-weight: 700; margin: 5px 0 4px; }
.related .r-desc { font-size: 12.5px; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* implementation guide */
.guide { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.guide-item { border: 1px solid var(--border); border-radius: 12px; background: var(--surface); padding: 16px 18px; }
.guide-item:last-child { grid-column: 1 / -1; }
.guide-item h3 { font-size: 14px; margin: 0 0 7px; color: var(--accent-2); display: flex; align-items: center; gap: 9px; }
.guide-item h3::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); flex: 0 0 auto; }
.guide-item p { margin: 0; font-size: 13.5px; line-height: 1.9; color: var(--muted); }
@media (max-width: 640px) { .guide { grid-template-columns: 1fr; } }

.pager-links { display: flex; justify-content: space-between; gap: 12px; margin-top: 28px; flex-wrap: wrap; }
.pager-links a { border: 1px solid var(--border); border-radius: 12px; padding: 12px 16px; background: var(--surface); max-width: 48%; }
.pager-links a:hover { border-color: var(--border-strong); background: var(--surface-2); }
.pager-links .dir { font: 600 11px var(--mono); color: var(--muted); }
.pager-links .t { font-weight: 700; margin-top: 3px; }

/* category page list */
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 16px; }
.cat-card {
  border: 1px solid var(--border); border-radius: 14px; background: var(--surface); padding: 18px;
  transition: border-color .15s, transform .15s, background .15s;
}
.cat-card:hover { border-color: var(--border-strong); transform: translateY(-3px); background: var(--surface-2); }
.cat-card .c-top { display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.cat-card h3 { font-size: 16px; margin: 0 0 6px; }
.cat-card p { color: var(--muted); font-size: 13px; margin: 0; }

/* all.html — full technique list */
.all-cat { margin-bottom: 30px; }
.all-cat h2.sec a { color: var(--accent-2); }
.all-cat h2.sec a:hover { text-decoration: underline; }
.all-cat h2.sec .cnt { color: var(--muted-2); font: 500 13px var(--mono); }
.all-cat ul { margin: 0; padding-left: 18px; columns: 2; column-gap: 36px; }
.all-cat li { margin-bottom: 9px; break-inside: avoid; font-size: 13.5px; line-height: 1.5; }
.all-cat li a { font-weight: 700; }
.all-cat li a:hover { color: var(--accent-2); }
.all-cat li span { color: var(--muted); }
@media (max-width: 720px) { .all-cat ul { columns: 1; } }

.site-footer { border-top: 1px solid var(--border); text-align: center; padding: 30px 20px; color: var(--muted); font-size: 13px; }
.site-footer a { color: var(--accent-2); }

@media (max-width: 640px) {
  .demo-stage iframe { height: 380px; }
  .pager-links a { max-width: 100%; }
}