:root {
  --font-sans: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-serif: ui-serif, Georgia, Cambria, "Times New Roman", Times, serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
  --bg: #fafaf9; --bg-elevated: #ffffff; --bg-sunken: #f5f5f4;
  --border: #e7e5e4; --border-strong: #d6d3d1;
  --text: #1c1917; --text-muted: #57534e; --text-subtle: #a8a29e;
  --accent: #b45309; --accent-hover: #78350f; --accent-soft: #fef3c7;
  --success: #047857;
  --shadow: 0 1px 2px rgba(28, 25, 23, 0.05), 0 6px 18px rgba(28, 25, 23, 0.05);
  --radius: 10px; --radius-lg: 16px; --radius-pill: 999px;
  --max-w: 1400px; --gutter: clamp(1rem, 2.5vw, 1.75rem);
}
[data-theme="dark"] {
  --bg: #0c0a09; --bg-elevated: #1c1917; --bg-sunken: #15110f;
  --border: #292524; --border-strong: #44403c;
  --text: #f5f5f4; --text-muted: #a8a29e; --text-subtle: #57534e;
  --accent: #fbbf24; --accent-hover: #fcd34d; --accent-soft: #422006;
}
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { font-family: var(--font-sans); font-size: 16px; line-height: 1.55;
  color: var(--text); background: var(--bg); min-height: 100dvh; display: flex; flex-direction: column; }
a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }
code { font-family: var(--font-mono); font-size: 0.92em; background: var(--bg-sunken); padding: 0.1em 0.35em; border-radius: 4px; }
main { flex: 1 0 auto; padding: 1.5rem 0 4rem; }
.site-header { position: sticky; top: 0; z-index: 10; background: var(--bg); border-bottom: 1px solid var(--border); }
.site-header > * { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--gutter);
  display: flex; align-items: center; justify-content: space-between; height: 56px; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; color: var(--text); font-weight: 600; }
.brand-mark { color: var(--accent); font-weight: 800; }
.brand-name em { font-style: italic; font-family: var(--font-serif); color: var(--accent); }
.site-nav { display: inline-flex; align-items: center; gap: 0.4rem; }
.nav-link { font-size: 0.875rem; color: var(--text-muted); padding: 0.35rem 0.6rem; border-radius: 6px; }
.nav-link:hover { background: var(--bg-sunken); color: var(--text); }
.theme-toggle { width: 34px; height: 34px; border-radius: 6px; color: var(--text-muted); }
.theme-toggle:hover { background: var(--bg-sunken); color: var(--text); }
.site-footer { border-top: 1px solid var(--border); padding: 1.5rem 0 2rem; margin-top: auto; font-size: 0.85rem; color: var(--text-muted); }
.site-footer > * { max-width: var(--max-w); margin: 0 auto; padding: 0 var(--gutter); }
.site-footer p { margin: 0.25rem 0; }
.site-footer a { color: var(--text-muted); }
.btn { display: inline-flex; align-items: center; gap: 0.45rem; padding: 0.5rem 0.9rem;
  border-radius: var(--radius); font-size: 0.875rem; font-weight: 500;
  border: 1px solid transparent; text-decoration: none; cursor: pointer; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); color: #fff; }
.btn-secondary { background: var(--bg-elevated); color: var(--text); border-color: var(--border-strong); }
.btn-secondary:hover { background: var(--bg-sunken); }
[data-theme="dark"] .btn-primary { color: #0c0a09; }
.btn[data-state="copied"] { background: var(--success); color: #fff; }
.tag { display: inline-block; padding: 0.1rem 0.55rem; font-size: 0.72rem; font-weight: 500;
  background: var(--bg-sunken); border: 1px solid var(--border); color: var(--text-muted); border-radius: var(--radius-pill); }
.gallery-wrap { padding: 1.5rem 0; }
.gallery-intro { max-width: var(--max-w); margin: 0 auto 1.5rem; padding: 0 var(--gutter);
  display: flex; align-items: baseline; justify-content: space-between; gap: 1rem; flex-wrap: wrap; }
.gallery-title { font-family: var(--font-serif); font-size: clamp(1.75rem, 3vw, 2.25rem); font-weight: 600; letter-spacing: -0.02em; margin: 0; }
.gallery-sub { margin: 0; font-size: 0.875rem; color: var(--text-muted); }
.gallery { display: grid; grid-template-columns: repeat(12, 1fr); gap: 1.25rem; grid-auto-flow: dense;
  max-width: var(--max-w); margin: 0 auto; padding: 0 var(--gutter); }
@media (max-width: 980px) { .gallery { grid-template-columns: repeat(6, 1fr); } }
@media (max-width: 600px) { .gallery { grid-template-columns: 1fr; } }
.card { background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius-lg); overflow: hidden; transition: transform 0.2s, box-shadow 0.2s; }
.card:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.card-link { display: flex; flex-direction: column; height: 100%; color: inherit; }
.card-cover { aspect-ratio: 16/9; background: var(--cover); position: relative; }
.card-cover-grid { position: absolute; inset: 0;
  background-image: linear-gradient(to right, rgba(255,255,255,0.08) 1px, transparent 1px),
                    linear-gradient(to bottom, rgba(255,255,255,0.08) 1px, transparent 1px);
  background-size: 28px 28px; }
.card-id { position: absolute; left: 0.85rem; bottom: 0.7rem; font-family: var(--font-mono);
  font-size: 0.72rem; color: rgba(255,255,255,0.95); background: rgba(0,0,0,0.2);
  padding: 0.15rem 0.45rem; border-radius: 999px; }
.card-body { padding: 0.95rem 1.1rem 1.1rem; display: flex; flex-direction: column; gap: 0.5rem; flex: 1; }
.card-title { margin: 0; font-size: 1.05rem; line-height: 1.3; font-weight: 600; }
.card-desc { margin: 0; font-size: 0.875rem; color: var(--text-muted);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-foot { margin-top: auto; padding-top: 0.5rem; display: flex; justify-content: space-between; align-items: center; gap: 0.5rem; font-size: 0.78rem; }
.card-date { color: var(--text-subtle); }
.card-tags { display: inline-flex; gap: 0.3rem; flex-wrap: wrap; }
.empty-state { margin: 2rem auto; max-width: 480px; padding: 2.5rem 1.5rem; text-align: center;
  border: 1px dashed var(--border-strong); border-radius: var(--radius-lg); background: var(--bg-elevated); }
.empty-title { font-family: var(--font-serif); font-size: 1.5rem; font-weight: 600; margin: 0.25rem 0 0.5rem; }
.empty-text { margin: 0 0 0.75rem; color: var(--text-muted); }
.empty-hint { margin: 0.25rem 0; color: var(--text-muted); font-size: 0.875rem; }
.view-page { display: flex; flex-direction: column; min-height: calc(100dvh - 56px); }
.view-bar { position: sticky; top: 56px; z-index: 5; display: grid; grid-template-columns: auto 1fr auto;
  align-items: center; gap: 1rem; padding: 0.85rem var(--gutter); background: var(--bg); border-bottom: 1px solid var(--border); }
.view-back { color: var(--text-muted); padding: 0.3rem 0.55rem; border-radius: 6px; }
.view-back:hover { background: var(--bg-sunken); color: var(--text); }
.view-title { margin: 0; font-size: 1rem; font-weight: 600; }
.view-actions { display: inline-flex; gap: 0.4rem; }
.view-body { display: grid; grid-template-columns: 1fr; gap: 1.25rem; padding: 1.25rem var(--gutter);
  flex: 1; align-items: start; max-width: var(--max-w); margin: 0 auto; width: 100%; }
@media (min-width: 900px) { .view-body { grid-template-columns: 280px 1fr; } }
.view-meta { display: flex; flex-direction: column; gap: 0.75rem; padding: 1rem;
  background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius-lg);
  position: sticky; top: calc(56px + 60px); }
.view-description { margin: 0; color: var(--text); font-size: 0.95rem; line-height: 1.6; }
.view-tags { display: flex; flex-wrap: wrap; gap: 0.3rem; }
.view-date { margin: 0; color: var(--text-subtle); font-size: 0.8rem; }
.view-frame-wrap { background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius-lg);
  overflow: hidden; min-height: 60vh; box-shadow: var(--shadow); }
.artifact-frame { width: 100%; height: 100%; min-height: 75vh; border: 0; display: block; background: #fff; }
.artifact-frame--short { min-height: 55vh; }
.share-page .share-card { display: grid; grid-template-columns: 1fr; gap: 1.25rem;
  max-width: var(--max-w); margin: 0 auto; padding: 1.5rem var(--gutter); }
@media (min-width: 900px) { .share-page .share-card { grid-template-columns: 360px 1fr; } }
.share-meta { background: var(--bg-elevated); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 1.5rem; display: flex; flex-direction: column; gap: 1rem; position: sticky; top: calc(56px + 60px); }
.share-title { font-family: var(--font-serif); font-size: 1.4rem; font-weight: 600; margin: 0; line-height: 1.3; }
.share-description { margin: 0; color: var(--text-muted); font-size: 0.95rem; line-height: 1.6; }
.share-tags-row { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; justify-content: space-between; }
.share-tags { display: inline-flex; flex-wrap: wrap; gap: 0.3rem; }
.share-date { margin: 0; color: var(--text-subtle); font-size: 0.8rem; }
.share-actions { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; margin-top: 0.5rem; }
.share-actions .btn { justify-content: center; }
@media (min-width: 480px) { .share-actions { grid-template-columns: repeat(4, 1fr); } }
.share-frame-wrap { border: 1px solid var(--border); border-radius: var(--radius-lg);
  overflow: hidden; background: var(--bg-elevated); box-shadow: var(--shadow); min-height: 60vh; }