/* ==========================================================
   BASE.CSS — shared structure for every theme.
   Only CSS custom properties change between themes (see the
   theme-*.css files loaded before this one in <head>).
   Never hardcode a color, radius, or shadow value in here —
   always reference a --token so theme switching stays free.
   ========================================================== */

:root {
  --font-display: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter", "Segoe UI", sans-serif;
  --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Menlo", monospace;
}

* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.read { max-width: 700px; margin: 0 auto; padding: 0 24px; }

/* ---------- NAV ---------- */
header.nav {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display:flex; align-items:center; justify-content:space-between; height:52px; max-width:1160px; margin:0 auto; padding:0 24px; }
.brand { font-family: var(--font-display); font-weight:700; font-size:15px; display:flex; align-items:center; gap:8px; }
.brand .mark { width:20px; height:20px; border-radius:6px; background: linear-gradient(150deg, var(--indigo), var(--saffron)); display:inline-block; }
nav.links { display:flex; gap:26px; font-size:13px; color: var(--ink-soft); font-weight:500; }
nav.links a:hover { color: var(--primary-text); }
.nav-cta { font-size:13px; background: var(--primary); color:#fff; padding:8px 16px; border-radius:100px; font-weight:600; }
.nav-cta:hover { background: var(--primary-text); }

/* ---------- CRUMBS ---------- */
.crumbs { padding: 28px 0 0; font-size:12.5px; color: var(--ink-soft); }
.crumbs a:hover { color: var(--primary-text); }

/* ---------- TAGS / CATEGORY COLORS ---------- */
.tag { display:inline-block; font-size:11px; font-weight:700; text-transform:uppercase; letter-spacing:0.04em; padding:4px 11px; border-radius:100px; }
.tag-indigo { color: var(--indigo-text); background: var(--indigo-tint); }
.tag-saffron { color: var(--saffron-text); background: var(--saffron-tint); }
.tag-green { color: var(--green-text); background: var(--green-tint); }
.tag-purple { color: var(--purple-text); background: var(--purple-tint); }

.bg-indigo { background: var(--indigo-tint); }
.bg-saffron { background: var(--saffron-tint); }
.bg-green { background: var(--green-tint); }
.bg-purple { background: var(--purple-tint); }

.top-indigo { border-top-color: var(--indigo) !important; }
.top-saffron { border-top-color: var(--saffron) !important; }
.top-green { border-top-color: var(--green) !important; }
.top-purple { border-top-color: var(--purple) !important; }

/* ---------- PAGE TOP / HERO GRID ---------- */
.page-top { padding: 32px 0 0; }
.hero-grid { display:grid; grid-template-columns: 1.4fr 1fr; gap: 20px; margin-bottom: 8px; }
.hero-feature { background: var(--card); border-radius: var(--radius-lg); overflow:hidden; box-shadow: var(--shadow); border:1px solid var(--line); }
.hero-feature .thumb { aspect-ratio: 16/10; background: var(--indigo-tint); }
.hero-feature .body { padding: 26px 28px 30px; }
.hero-feature h1 { font-family: var(--font-display); font-size: 28px; font-weight:700; letter-spacing:-0.02em; line-height:1.15; margin: 12px 0 10px; }
.hero-feature p { font-size:14.5px; color: var(--ink-soft); max-width:480px; }
.byline-sm { font-size:12.5px; color: var(--ink-soft); margin-top:16px; font-family: var(--font-mono); }

.hero-side { display:flex; flex-direction:column; gap:16px; }
.side-item { display:flex; gap:14px; background: var(--card); border-radius: var(--radius-md); padding:14px; box-shadow: var(--shadow); border:1px solid var(--line); flex:1; }
.side-item .thumb { width:88px; height:88px; border-radius: var(--radius-sm); flex-shrink:0; background: var(--indigo-tint); }
.side-item .tag { font-size:9.5px; padding:2px 8px; }
.side-item h3 { font-family: var(--font-display); font-size:14.5px; font-weight:700; letter-spacing:-0.01em; line-height:1.3; margin:6px 0 4px; }
.side-item .meta { font-size:11px; color: var(--ink-soft); }

/* ---------- QUICK-HIT RAIL ---------- */
.quickhit { display:grid; grid-template-columns: repeat(4,1fr); gap:0; margin: 28px 0 0; background: var(--card); border-radius: var(--radius-md); box-shadow: var(--shadow); border:1px solid var(--line); overflow:hidden; }
.qh-item { padding: 18px 20px; border-right:1px solid var(--line); border-top: 3px solid transparent; }
.qh-item:last-child { border-right:none; }
.qh-item .cat { font-size:10.5px; font-weight:700; color: var(--ink-soft); text-transform:uppercase; letter-spacing:0.04em; }
.qh-item h4 { font-family: var(--font-display); font-size:13.5px; font-weight:600; line-height:1.3; margin-top:6px; }
.qh-item:hover h4 { text-decoration:underline; text-underline-offset:2px; }
@media (max-width:860px) { .quickhit { grid-template-columns: 1fr 1fr; } }

/* ---------- NEWSLETTER ---------- */
.newsletter-inline { background: linear-gradient(120deg, var(--indigo-tint), var(--saffron-tint)); border-radius: var(--radius-lg); padding: 30px 36px; margin: 40px 0; color: var(--ink); display:flex; align-items:center; justify-content:space-between; gap:24px; border:1px solid var(--line); flex-wrap: wrap; }
.newsletter-inline h3 { font-family: var(--font-display); font-size:19px; margin-bottom:4px; font-weight:700; }
.newsletter-inline p { font-size:13px; color: var(--ink-soft); }
.newsletter-inline form { display:flex; gap:8px; flex-shrink:0; }
.newsletter-inline input[type=email] { border:1px solid var(--line); border-radius:100px; padding:10px 16px; font-size:13px; width:200px; background:#fff; font-family: var(--font-body); }
.newsletter-inline button { border:none; background: var(--primary); color:#fff; font-weight:700; font-size:13px; padding:10px 18px; border-radius:100px; cursor:pointer; }
.newsletter-inline button:hover { background: var(--primary-text); }
.form-note { font-size:12px; margin-top:10px; }
.form-note.success { color: var(--green-text); }
.form-note.error { color: var(--saffron-text); }
@media (max-width:760px) { .newsletter-inline { flex-direction:column; align-items:flex-start; } .newsletter-inline form { width:100%; } .newsletter-inline input { flex:1; width:auto; } }

/* ---------- SECTION ---------- */
.section { padding: 52px 0; border-top:1px solid var(--line); }
.section-head { display:flex; align-items:baseline; justify-content:space-between; margin-bottom: 24px; flex-wrap:wrap; gap:10px; }
.section-head h2 { font-family: var(--font-display); font-size:21px; font-weight:700; letter-spacing:-0.02em; }
.section-head a.viewall { font-size:12.5px; color: var(--primary-text); font-weight:600; }

/* ---------- SCROLLER (covers / spotlights) ---------- */
.scroller { display:flex; gap:16px; overflow-x:auto; padding-bottom: 10px; scrollbar-width:none; }
.scroller::-webkit-scrollbar { display:none; }
.cover-card { flex: 0 0 170px; }
.cover-card .thumb { aspect-ratio: 3/4; border-radius: var(--radius-sm); background: var(--indigo-tint); box-shadow: var(--shadow); margin-bottom:10px; transition: transform .2s ease; border:1px solid var(--line); }
.cover-card:hover .thumb { transform: translateY(-3px); }
.cover-card:nth-child(2n) .thumb { background: var(--saffron-tint); }
.cover-card:nth-child(3n) .thumb { background: var(--green-tint); }
.cover-card h4 { font-family: var(--font-display); font-size:12.5px; font-weight:600; line-height:1.3; }
.cover-card.wide { flex-basis: 220px; }
.cover-card.wide .thumb { aspect-ratio: 4/3; }

/* ---------- MODULE (feature + list) ---------- */
.module { display:grid; grid-template-columns: 1.1fr 1fr; gap: 28px; }
.module-feature .thumb { aspect-ratio:16/10; border-radius: var(--radius-md); background: var(--indigo-tint); margin-bottom:14px; }
.module-feature h3 { font-family: var(--font-display); font-size:19px; font-weight:700; letter-spacing:-0.01em; line-height:1.3; margin-bottom:8px; }
.module-feature .meta { font-size:12px; color: var(--ink-soft); }
.module-list { display:flex; flex-direction:column; }
.ml-item { display:flex; gap:14px; padding: 14px 0; border-top:1px solid var(--line); }
.ml-item:first-child { border-top:none; padding-top:0; }
.ml-item .thumb { width:64px; height:64px; border-radius: var(--radius-sm); flex-shrink:0; }
.ml-item h4 { font-family: var(--font-display); font-size:13.5px; font-weight:600; line-height:1.3; }
.ml-item .meta { font-size:11px; color: var(--ink-soft); margin-top:4px; }
@media (max-width:860px) { .module { grid-template-columns: 1fr; } }

/* ---------- CARD GRID (blog listing, machinery grid) ---------- */
.card-grid { display:grid; grid-template-columns: repeat(3, 1fr); gap:20px; }
.pcard { background: var(--card); border-radius: var(--radius-md); overflow:hidden; box-shadow: var(--shadow); border:1px solid var(--line); transition: transform .2s ease; }
.pcard:hover { transform: translateY(-3px); }
.pcard .thumb { aspect-ratio:16/10; background: var(--indigo-tint); }
.pcard .body { padding: 16px 18px 20px; }
.pcard h3 { font-family: var(--font-display); font-size:15.5px; font-weight:700; margin:10px 0 6px; letter-spacing:-0.01em; line-height:1.3; }
.pcard p { font-size:12.5px; color: var(--ink-soft); }
.pcard .meta { font-size:11.5px; color: var(--ink-soft); margin-top:10px; font-family: var(--font-mono); }
@media (max-width:860px) { .card-grid { grid-template-columns: 1fr; } }

/* ---------- TOOLS ---------- */
.tools-strip { display:grid; grid-template-columns: repeat(4,1fr); gap:16px; }
.tool-chip { background: var(--card); border-radius: var(--radius-md); padding: 22px 18px; border:1px solid var(--line); box-shadow: var(--shadow); transition: transform .2s ease; }
.tool-chip:hover { transform: translateY(-2px); }
.tool-chip .ic { width:34px; height:34px; border-radius:10px; margin-bottom:14px; }
.tool-chip h4 { font-size:14px; font-weight:700; margin-bottom:4px; }
.tool-chip p { font-size:12px; color: var(--ink-soft); }
@media (max-width:860px) { .tools-strip { grid-template-columns: 1fr 1fr; } }

/* ---------- BUTTONS / FORMS (generic) ---------- */
.btn { display:inline-block; font-size:13px; font-weight:600; padding:9px 18px; border-radius:100px; border:1px solid var(--line); background:#fff; color:var(--ink); cursor:pointer; }
.btn:hover { border-color: var(--primary); color: var(--primary-text); }
.btn.primary { background: var(--primary); border-color: var(--primary); color:#fff; }
.btn.primary:hover { background: var(--primary-text); border-color: var(--primary-text); color:#fff; }
.filter-bar { display:flex; gap:8px; flex-wrap:wrap; margin-bottom:28px; }
.filter-chip { font-size:12.5px; padding:7px 15px; border-radius:100px; border:1px solid var(--line); color:var(--ink-soft); background:#fff; }
.filter-chip.active { background: var(--primary); border-color: var(--primary); color:#fff; }
.pagination { display:flex; gap:8px; justify-content:center; margin-top:36px; }
.pagination a, .pagination span { font-size:13px; padding:8px 14px; border-radius:8px; border:1px solid var(--line); }
.pagination a:hover { border-color: var(--primary); color: var(--primary-text); }
.pagination .current { background: var(--primary); border-color: var(--primary); color:#fff; }

/* ---------- ARTICLE PAGE ---------- */
.art-head { padding: 20px 0 32px; }
h1.art-title { font-family: var(--font-display); font-weight:700; font-size: clamp(28px, 4.6vw, 42px); letter-spacing:-0.025em; line-height:1.1; margin-bottom:16px; }
.art-dek { font-size:17px; color: var(--ink-soft); line-height:1.5; max-width: 620px; }
.byline { display:flex; align-items:center; gap:12px; margin-top:28px; padding-top:24px; border-top:1px solid var(--line); flex-wrap:wrap; }
.avatar { width:40px; height:40px; border-radius:50%; background: var(--indigo-tint); flex-shrink:0; }
.byline-text .name { font-size:13.5px; font-weight:600; }
.byline-text .meta { font-size:12.5px; color: var(--ink-soft); }
.art-hero-img { aspect-ratio:16/8; border-radius: var(--radius-lg); background: var(--saffron-tint); margin: 28px 0 40px; box-shadow: var(--shadow); }
.art-body { font-size:17px; line-height:1.75; color: var(--ink); }
.art-body p { margin-bottom:22px; }
.art-body h2 { font-family: var(--font-display); font-size:23px; font-weight:700; letter-spacing:-0.015em; margin:38px 0 16px; }
.pull-fact { background: var(--card); border-radius: var(--radius-md); box-shadow: var(--shadow); padding:22px 24px; margin:30px 0; border:1px solid var(--line); }
.pull-fact .stat { font-family: var(--font-display); font-size:30px; font-weight:700; letter-spacing:-0.02em; color: var(--primary-text); }
.tags-row { display:flex; gap:8px; flex-wrap:wrap; margin:40px 0 8px; }
.tags-row a { font-size:12.5px; padding:6px 13px; border-radius:100px; background:var(--card); border:1px solid var(--line); color: var(--ink-soft); }
.tags-row a:hover { border-color: var(--primary); color: var(--primary-text); }
.author-card { display:flex; gap:16px; background: var(--card); border-radius: var(--radius-md); box-shadow: var(--shadow); padding:22px; margin:36px 0; border:1px solid var(--line); }
.author-card h4 { font-family: var(--font-display); font-size:15px; margin-bottom:4px; }
.author-card p { font-size:13px; color: var(--ink-soft); line-height:1.5; }

/* ---------- MACHINERY DETAIL / SPECS ---------- */
.spec-table { width:100%; border-collapse:collapse; background: var(--card); border-radius: var(--radius-md); overflow:hidden; box-shadow: var(--shadow); border:1px solid var(--line); }
.spec-table th, .spec-table td { padding:14px 20px; text-align:left; font-size:13px; }
.spec-table thead th { background: var(--surface); font-weight:600; color: var(--ink-soft); border-bottom:1px solid var(--line); font-size:11px; text-transform:uppercase; letter-spacing:0.04em; }
.spec-table tbody td { border-bottom:1px solid var(--line); font-family: var(--font-mono); }
.spec-table tbody td:first-child { font-family: var(--font-body); font-weight:600; }
.spec-table tbody tr:last-child td { border-bottom:none; }
.spec-table tbody tr:hover { background: var(--indigo-tint); }
.price-tag { font-family: var(--font-display); font-size:26px; font-weight:700; color: var(--primary-text); }

/* ---------- EXHIBITIONS LIST ---------- */
.expo-row { display:flex; gap:20px; align-items:center; padding:20px; background:var(--card); border-radius: var(--radius-md); box-shadow: var(--shadow); border:1px solid var(--line); margin-bottom:14px; flex-wrap:wrap; }
.expo-date-block { text-align:center; background: var(--indigo-tint); border-radius: var(--radius-sm); padding:10px 16px; flex-shrink:0; min-width:76px; }
.expo-date-block .d { font-family: var(--font-display); font-size:20px; font-weight:700; color: var(--indigo-text); line-height:1; }
.expo-date-block .m { font-size:10.5px; color: var(--ink-soft); text-transform:uppercase; letter-spacing:0.04em; }
.expo-row h4 { font-family: var(--font-display); font-size:16px; font-weight:700; margin-bottom:4px; }
.expo-row .loc { font-size:12.5px; color: var(--ink-soft); }

/* ---------- FOOTER ---------- */
footer { padding: 44px 0 60px; border-top:1px solid var(--line); background: var(--surface); }
.foot-inner { display:flex; justify-content:space-between; font-size:12px; color: var(--ink-soft); flex-wrap:wrap; gap:10px; }
.foot-inner a:hover { color: var(--primary-text); }

/* ---------- MISC ---------- */
.empty-state { text-align:center; padding:60px 20px; color: var(--ink-soft); font-size:14px; }
