/* TOP 3D MODELER — editorial stylesheet */
:root {
  --bg: #f7f5f1;
  --paper: #fffdf9;
  --ink: #181510;
  --muted: #6e675d;
  --faint: #98918a;
  --border: #e4ddd2;
  --accent: #d94f0b;
  --accent-soft: #fdeee4;
  --link: #b23e07;
  --code-bg: #efe9df;
  --radius: 10px;
  --serif: Georgia, 'Times New Roman', 'New York', serif;
  --sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--link); text-decoration-color: rgba(178,62,7,.35); }
a:hover { text-decoration-color: var(--link); }

/* ---------- header ---------- */
.site-header {
  background: var(--paper);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 50;
}
.header-inner {
  max-width: 1120px; margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; gap: 28px; height: 58px;
}
.wordmark {
  font-family: var(--sans);
  font-weight: 800; font-size: 19px; letter-spacing: -.02em;
  color: var(--ink); text-decoration: none; white-space: nowrap;
}
.wordmark em { font-style: normal; color: var(--accent); }
.site-nav { display: flex; gap: 22px; margin-left: auto; }
.site-nav a {
  color: var(--muted); text-decoration: none; font-size: 14.5px;
  font-weight: 600; letter-spacing: .01em;
}
.site-nav a:hover { color: var(--ink); }
@media (max-width: 700px) {
  .header-inner { flex-wrap: wrap; height: auto; padding: 10px 16px; gap: 6px 20px; }
  .site-nav { margin-left: 0; gap: 16px; flex-wrap: wrap; }
}

/* ---------- layout ---------- */
.container { max-width: 1120px; margin: 0 auto; padding: 0 20px; }
.narrow { max-width: 740px; margin: 0 auto; padding: 0 20px; }

/* ---------- home ---------- */
.home-hero {
  border-bottom: 1px solid var(--border);
  background: linear-gradient(180deg, var(--paper), var(--bg));
  padding: 56px 0 40px;
}
.home-hero .kicker {
  color: var(--accent); font-weight: 700; font-size: 13px;
  text-transform: uppercase; letter-spacing: .12em;
}
.home-hero h1 {
  font-family: var(--serif); font-size: clamp(30px, 4.5vw, 46px);
  line-height: 1.12; letter-spacing: -.01em; margin: 10px 0 12px; max-width: 760px;
}
.home-hero p { color: var(--muted); max-width: 620px; font-size: 18px; }
.section-title {
  font-family: var(--serif); font-size: 24px; margin: 44px 0 18px;
  display: flex; align-items: baseline; gap: 14px;
}
.section-title a { font-size: 13px; font-family: var(--sans); font-weight: 600; }

/* ---------- cards ---------- */
.card-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px;
}
@media (max-width: 900px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .card-grid { grid-template-columns: 1fr; } }
.card {
  background: var(--paper); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform .15s ease, box-shadow .15s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(24,21,16,.08); }
.card-thumb { aspect-ratio: 16/9; object-fit: cover; width: 100%; background: #eee; }
.card-body { padding: 16px 18px 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.card-cat {
  font-size: 11px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .1em; color: var(--accent);
}
.card-title {
  font-family: var(--serif); font-size: 19px; line-height: 1.25; font-weight: 700;
}
.card-title a { color: var(--ink); text-decoration: none; }
.card-title a:hover { color: var(--accent); }
.card-desc { font-size: 14px; color: var(--muted); flex: 1; }
.card-date { font-size: 12px; color: var(--faint); }

/* ---------- article ---------- */
.article-head { padding: 40px 0 0; }
.breadcrumbs { font-size: 13px; color: var(--faint); margin-bottom: 18px; }
.breadcrumbs a { color: var(--muted); text-decoration: none; }
.breadcrumbs a:hover { color: var(--accent); }
.article-head .cat-chip {
  display: inline-block; background: var(--accent-soft); color: var(--accent);
  font-size: 12px; font-weight: 700; text-transform: uppercase;
  letter-spacing: .1em; padding: 4px 10px; border-radius: 4px;
  text-decoration: none; margin-bottom: 14px;
}
.article-head h1 {
  font-family: var(--serif); font-size: clamp(28px, 4vw, 42px);
  line-height: 1.15; letter-spacing: -.01em;
}
.lede { font-size: 19px; color: var(--muted); margin-top: 14px; line-height: 1.5; }
.byline {
  display: flex; align-items: center; gap: 12px;
  margin: 22px 0 26px; padding: 14px 0;
  border-top: 1px solid var(--border); border-bottom: 1px solid var(--border);
  font-size: 13.5px; color: var(--muted);
}
.byline .avatar {
  width: 38px; height: 38px; border-radius: 50%;
  background: var(--accent); color: #fff; font-weight: 800;
  display: flex; align-items: center; justify-content: center; font-size: 14px;
}
.byline b { color: var(--ink); }
.hero-fig { margin: 8px 0 30px; }
.hero-fig img { border-radius: var(--radius); border: 1px solid var(--border); }
.hero-fig figcaption, figure figcaption {
  font-size: 12.5px; color: var(--faint); margin-top: 8px; text-align: center;
}
.toc {
  background: var(--paper); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 18px 22px; margin: 0 0 34px;
  font-size: 15px;
}
.toc b { display: block; font-size: 13px; text-transform: uppercase; letter-spacing: .08em; color: var(--muted); margin-bottom: 8px; }
.toc ol { padding-left: 20px; display: grid; gap: 4px; }
.toc a { color: var(--ink); text-decoration: none; }
.toc a:hover { color: var(--accent); text-decoration: underline; }

/* ---------- prose ---------- */
.prose { font-size: 17px; }
.prose p { margin: 0 0 20px; }
.prose h2 {
  font-family: var(--serif); font-size: 27px; line-height: 1.2;
  margin: 44px 0 16px; scroll-margin-top: 80px;
}
.prose h3 {
  font-family: var(--sans); font-size: 20px; font-weight: 700;
  margin: 32px 0 12px; scroll-margin-top: 80px;
}
.prose h4 { font-size: 17px; margin: 24px 0 10px; }
.prose ul, .prose ol { margin: 0 0 20px; padding-left: 24px; }
.prose li { margin-bottom: 8px; }
.prose li::marker { color: var(--accent); }
.prose strong { font-weight: 700; }
.prose blockquote {
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 18px; margin: 0 0 22px;
  color: var(--muted); font-style: italic;
}
.prose code {
  background: var(--code-bg); padding: 2px 6px; border-radius: 4px;
  font-size: 14.5px; font-family: 'SF Mono', Menlo, Consolas, monospace;
}
.prose figure { margin: 26px 0; }
.prose figure img { border-radius: var(--radius); border: 1px solid var(--border); }
.prose hr { border: 0; border-top: 1px solid var(--border); margin: 40px 0; }
.prose table {
  width: 100%; border-collapse: collapse; margin: 0 0 26px;
  font-size: 14.5px; background: var(--paper);
  border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; display: block; overflow-x: auto;
}
.prose thead, .prose tbody { display: table; width: 100%; min-width: 560px; }
.prose th {
  text-align: left; font-weight: 700; font-size: 12.5px;
  text-transform: uppercase; letter-spacing: .06em; color: var(--muted);
  padding: 10px 14px; border-bottom: 2px solid var(--border);
}
.prose td { padding: 10px 14px; border-bottom: 1px solid var(--border); vertical-align: top; }
.prose tr:last-child td { border-bottom: 0; }
.prose tbody tr:nth-child(even) { background: rgba(0,0,0,.015); }

/* verdict box */
.verdict {
  background: var(--accent-soft); border: 1px solid #f2cdb4;
  border-radius: var(--radius); padding: 20px 24px; margin: 34px 0;
}
.verdict b.tag {
  display: inline-block; background: var(--accent); color: #fff;
  font-size: 11px; font-weight: 800; text-transform: uppercase;
  letter-spacing: .1em; padding: 3px 9px; border-radius: 4px; margin-bottom: 8px;
}
.verdict p { margin: 0; font-size: 16px; }

/* disclosure note */
.disclosure {
  font-size: 13.5px; color: var(--muted);
  border: 1px dashed var(--border); border-radius: var(--radius);
  padding: 14px 18px; margin: 30px 0; background: var(--paper);
}

/* faq */
.faq-item { border-bottom: 1px solid var(--border); padding: 16px 0; }
.faq-item h3 { margin: 0 0 8px; font-size: 17px; }
.faq-item p { margin: 0; color: var(--muted); }

/* related */
.related { margin: 48px 0 30px; }
.related h2 { font-family: var(--serif); font-size: 23px; margin-bottom: 16px; }
.related .card-grid { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 700px) { .related .card-grid { grid-template-columns: 1fr; } }

/* author box */
.author-box {
  display: flex; gap: 16px; align-items: flex-start;
  background: var(--paper); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 20px 22px; margin: 40px 0;
}
.author-box .avatar {
  width: 52px; height: 52px; border-radius: 50%; flex-shrink: 0;
  background: var(--accent); color: #fff; font-weight: 800;
  display: flex; align-items: center; justify-content: center; font-size: 18px;
}
.author-box b { display: block; margin-bottom: 4px; }
.author-box p { font-size: 14px; color: var(--muted); margin: 0; }

/* ---------- hub / list pages ---------- */
.hub-head { padding: 44px 0 8px; max-width: 740px; }
.hub-head h1 { font-family: var(--serif); font-size: 36px; margin-bottom: 10px; }
.hub-head p { color: var(--muted); font-size: 17px; }
.hub-list { display: grid; gap: 16px; margin: 30px 0 60px; }
.hub-item {
  display: flex; gap: 20px; background: var(--paper);
  border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; text-decoration: none; color: inherit;
  transition: transform .15s ease, box-shadow .15s ease;
}
.hub-item:hover { transform: translateY(-1px); box-shadow: 0 6px 18px rgba(24,21,16,.07); }
.hub-item img { width: 170px; aspect-ratio: 16/10; object-fit: cover; border-radius: 6px; flex-shrink: 0; }
.hub-item h2 { font-family: var(--serif); font-size: 21px; line-height: 1.25; margin-bottom: 6px; color: var(--ink); }
.hub-item p { font-size: 14.5px; color: var(--muted); margin-bottom: 6px; }
.hub-item .meta { font-size: 12px; color: var(--faint); }
@media (max-width: 640px) {
  .hub-item { flex-direction: column; }
  .hub-item img { width: 100%; }
}

/* ---------- footer ---------- */
.site-footer {
  border-top: 1px solid var(--border); background: var(--paper);
  margin-top: 70px; padding: 44px 0 30px; font-size: 14px; color: var(--muted);
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 30px; margin-bottom: 30px;
}
@media (max-width: 700px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer h4 {
  font-size: 12px; text-transform: uppercase; letter-spacing: .1em;
  color: var(--faint); margin-bottom: 10px;
}
.site-footer ul { list-style: none; display: grid; gap: 7px; }
.site-footer a { color: var(--muted); text-decoration: none; }
.site-footer a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border); padding-top: 20px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px;
  font-size: 13px; color: var(--faint);
}

/* misc */
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin: 20px 0 40px; }
.tag-list a {
  font-size: 12.5px; color: var(--muted); text-decoration: none;
  border: 1px solid var(--border); border-radius: 999px; padding: 5px 13px;
}
.tag-list a:hover { border-color: var(--accent); color: var(--accent); }
.notfound { text-align: center; padding: 90px 20px; }
.notfound h1 { font-family: var(--serif); font-size: 44px; margin-bottom: 12px; }
.notfound p { color: var(--muted); margin-bottom: 24px; }
.btn {
  display: inline-block; background: var(--accent); color: #fff;
  padding: 12px 26px; border-radius: 8px; text-decoration: none; font-weight: 700;
}
.btn:hover { background: #b84008; color: #fff; }