/* ui.css — CivilWorks Atelier v45 design system. One clean, minimal and interactive design for the whole site.
   Loaded last on every page (after the older layers, which it overrides). Light and dark mode only.
   Principles: one neutral canvas, white surfaces with hairline borders, a single cobalt accent, Inter throughout,
   monochrome primary actions, generous whitespace, and live drawings everywhere. */


/* ---------------------------------------------------------------- tokens */
:root[data-ui] {
  --font-display: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-script: var(--font-display);
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;
  --r: 14px; --r-lg: 18px;
}
:root[data-ui][data-mode="light"] {
  --bg: #fafafa; --bg-2: #f3f4f6; --surface: #ffffff; --ink: #0b0d12; --muted: #5b616e; --line: #e5e7eb;
  --glass: rgba(255, 255, 255, .82); --glass-brd: rgba(15, 17, 21, .08);
  --purple-soft: color-mix(in srgb, var(--purple) 12%, #fff); --purple-tint: color-mix(in srgb, var(--purple) 5%, #fff);
  --input-ink: #1d4ed8; --hatch: rgba(15, 17, 21, .25); --paper-ink: 15, 17, 21; --navy: #0b0d12;
  --shadow: 0 1px 2px rgba(16, 24, 40, .04);
  --shadow-lg: 0 1px 2px rgba(16, 24, 40, .04), 0 14px 30px -14px rgba(16, 24, 40, .16);
  --mesh-a: transparent; --mesh-b: transparent; --on-accent: #fff;
  color-scheme: light;
}
:root[data-ui][data-mode="dark"] {
  --bg: #0a0a0b; --bg-2: #121214; --surface: #141417; --ink: #ededef; --muted: #a1a1aa; --line: #27272c;
  --glass: rgba(20, 20, 23, .82); --glass-brd: rgba(255, 255, 255, .08);
  --purple-soft: color-mix(in srgb, var(--purple) 24%, #0a0a0b); --purple-tint: color-mix(in srgb, var(--purple) 10%, #0a0a0b);
  --input-ink: #8fb2ff; --hatch: rgba(255, 255, 255, .22); --paper-ink: 237, 237, 239; --navy: #ededef;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow-lg: 0 1px 2px rgba(0, 0, 0, .4), 0 18px 40px -16px rgba(0, 0, 0, .7);
  --mesh-a: transparent; --mesh-b: transparent; --on-accent: #0a0a0b;
  color-scheme: dark;
}
/* the default accent becomes a single cobalt blue with slate secondaries */
:root[data-ui][data-accent="atelier"] { --purple: #2563eb; --purple-ink: #1d4ed8; --accent-2: #64748b; --accent-3: #0d9488; --glow: 37, 99, 235; --brass: #0b0d12; --brass-2: #374151; --verdigris: #0d9488; --oxblood: #b42318; }
:root[data-ui][data-mode="dark"][data-accent="atelier"] { --purple: #5b8cff; --purple-ink: #8fb2ff; --accent-2: #94a3b8; --brass: #ededef; --brass-2: #d4d4d8; }
:root[data-ui]:not([data-accent="atelier"]) { --accent-2: color-mix(in srgb, var(--purple) 55%, #64748b); }

/* ---------------------------------------------------------------- canvas and type */
:root[data-ui], :root[data-ui] body::before { background: var(--bg) !important; }
:root[data-ui] body { color: var(--ink); background: var(--bg) !important; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
:root[data-ui] #vbg, :root[data-ui] .hero-contour, :root[data-ui] .ornament::before, :root[data-ui] .ornament::after { display: none !important; }
:root[data-ui] h1, :root[data-ui] h2, :root[data-ui] h3, :root[data-ui] h4 { font-family: var(--font-display); letter-spacing: -.022em; color: var(--ink); }
:root[data-ui] h1 { font-weight: 700; letter-spacing: -.035em; line-height: 1.04; }
:root[data-ui] h2 { font-weight: 650; }
:root[data-ui] h1 em, :root[data-ui] .lib-hero h1 em, :root[data-ui] .hero h1 em, :root[data-ui] .at-hero h1 em { font-style: normal; font-weight: inherit; color: var(--purple); }
:root[data-ui] .eyebrow, :root[data-ui] .at-hero .kicker, :root[data-ui] .kicker { font: 600 .72rem/1.4 var(--font-body) !important; letter-spacing: .08em !important; text-transform: uppercase; color: var(--muted) !important; }
:root[data-ui] .eyebrow::before, :root[data-ui] .kicker::before, :root[data-ui] .kicker::after { display: none !important; content: none !important; }
:root[data-ui] .ornament { color: var(--muted); font-family: var(--font-body); font-size: .85rem; justify-content: center; }
:root[data-ui] a { text-underline-offset: 3px; }
:root[data-ui] ::selection { background: color-mix(in srgb, var(--purple) 22%, transparent); }
:root[data-ui] .lede, :root[data-ui] p.lede { color: var(--muted); }

/* ---------------------------------------------------------------- navigation and footer */
:root[data-ui] .nav { background: color-mix(in srgb, var(--bg) 82%, transparent) !important; border-bottom: 1px solid var(--line) !important; box-shadow: none !important; backdrop-filter: saturate(1.4) blur(12px); }
:root[data-ui] .nav .bn { font-family: var(--font-body); font-weight: 700; letter-spacing: -.01em; }
:root[data-ui] .nav .bn i { font-style: normal; font-weight: 500; color: var(--muted); }
:root[data-ui] .nav-links > li > a, :root[data-ui] .nav-dd-btn { font-weight: 500; color: var(--ink); border-radius: 8px; }
:root[data-ui] .nav-links > li > a:hover, :root[data-ui] .nav-dd-btn:hover { background: var(--bg-2); }
:root[data-ui] .nav-dd-menu { border-radius: 14px !important; border: 1px solid var(--line) !important; box-shadow: var(--shadow-lg) !important; background: var(--surface) !important; }
:root[data-ui] .nav-dd-h { font: 600 .68rem var(--font-body) !important; letter-spacing: .08em; text-transform: uppercase; color: var(--muted) !important; }
:root[data-ui] .nav-dd-menu a:hover { background: var(--bg-2); color: var(--ink); }
:root[data-ui] .icon-btn { border-radius: 10px; border: 1px solid var(--line); background: var(--surface); box-shadow: none; }
:root[data-ui] .code-pick select { border-radius: 8px; border-color: var(--line); background: var(--surface); }
:root[data-ui] .theme-pop { border-radius: 14px; border: 1px solid var(--line); box-shadow: var(--shadow-lg); background: var(--surface); }
:root[data-ui] .theme-pop h4 { font: 600 .68rem var(--font-body); letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
:root[data-ui] .foot { border-top: 1px solid var(--line) !important; background: transparent !important; }
:root[data-ui] .foot-grid h4 { font: 600 .7rem var(--font-body) !important; letter-spacing: .08em; color: var(--muted) !important; }
:root[data-ui] .foot-grid a:hover { color: var(--ink); }
:root[data-ui] .foot-base { font: 400 .8rem var(--font-body) !important; }
:root[data-ui] .crumbs, :root[data-ui] .crumbs a { color: var(--muted); font-size: .85rem; }
:root[data-ui] .crumbs a { text-decoration: none; }
:root[data-ui] .crumbs a:hover { color: var(--ink); text-decoration: underline; }

/* ---------------------------------------------------------------- buttons, chips, inputs */
:root[data-ui] .btn { border-radius: 10px; border: 1px solid var(--line) !important; background: var(--surface); color: var(--ink); box-shadow: none !important; font-weight: 600; text-shadow: none; transition: background .15s, border-color .15s, transform .15s; }
:root[data-ui] .btn:hover { border-color: color-mix(in srgb, var(--ink) 30%, var(--line)) !important; background: var(--bg-2); filter: none; transform: none; }
:root[data-ui] .btn.primary { background: var(--ink) !important; color: var(--bg) !important; border-color: var(--ink) !important; }
:root[data-ui] .btn.primary:hover { background: color-mix(in srgb, var(--ink) 86%, var(--bg)) !important; }
:root[data-ui] .btn.brass { background: var(--purple) !important; color: #fff !important; border-color: var(--purple) !important; }
:root[data-ui][data-mode="dark"] .btn.brass { color: #0a0a0b !important; }
:root[data-ui] .btn.brass:hover { background: var(--purple-ink) !important; }
:root[data-ui] .pill, :root[data-ui] .cp-chip, :root[data-ui] .chip { border-radius: 999px; box-shadow: none; }
:root[data-ui] input:not([type=checkbox]):not([type=radio]):not([type=range]), :root[data-ui] select, :root[data-ui] textarea { border-radius: 8px; border-color: var(--line); box-shadow: none; }
:root[data-ui] input:focus-visible, :root[data-ui] select:focus-visible, :root[data-ui] textarea:focus-visible, :root[data-ui] .btn:focus-visible { outline: 2px solid color-mix(in srgb, var(--purple) 60%, transparent); outline-offset: 1px; }
:root[data-ui] input[type=range] { accent-color: var(--purple); }

/* ---------------------------------------------------------------- surfaces */
:root[data-ui] .disc-card, :root[data-ui] .st-card, :root[data-ui] .st-gcard, :root[data-ui] .plan-card, :root[data-ui] .cp-card, :root[data-ui] .at-stats > div, :root[data-ui] .seo-guide, :root[data-ui] .quote-band, :root[data-ui] .tool-card, :root[data-ui] .card, :root[data-ui] .panel, :root[data-ui] .lab-card, :root[data-ui] .demo-card, :root[data-ui] .est-card, :root[data-ui] .post-card, :root[data-ui] .hub-quick a, :root[data-ui] .lib-tools a {
  border-radius: var(--r) !important; border: 1px solid var(--line) !important; background: var(--surface) !important; box-shadow: none !important; background-image: none !important;
}
:root[data-ui] .disc-card:hover, :root[data-ui] .st-card:hover, :root[data-ui] .tool-card:hover, :root[data-ui] .card:hover, :root[data-ui] .lab-card:hover, :root[data-ui] .demo-card:hover, :root[data-ui] .post-card:hover, :root[data-ui] .hub-quick a:hover, :root[data-ui] .lib-tools a:hover {
  border-color: color-mix(in srgb, var(--ink) 22%, var(--line)) !important; box-shadow: var(--shadow-lg) !important; transform: translateY(-2px);
}
:root[data-ui] .disc-card b, :root[data-ui] .st-card b { font-family: var(--font-display); font-weight: 650; letter-spacing: -.015em; color: var(--ink); }
:root[data-ui] .disc-card .no, :root[data-ui] .st-card .no { font: 600 .66rem var(--font-body); letter-spacing: .08em; color: var(--muted); }
:root[data-ui] .disc-card em, :root[data-ui] .st-card em { font: 600 .8rem var(--font-body); color: var(--purple); }
:root[data-ui] .wing-art { background: var(--bg-2) !important; border: 0 !important; border-radius: 10px; }
:root[data-ui] .plan-card.featured { border-color: var(--ink) !important; box-shadow: 0 0 0 1px var(--ink) !important; }
:root[data-ui] .plan-card .ribbon { background: var(--ink); color: var(--bg); font-family: var(--font-body); border-radius: 999px; right: 14px; }
:root[data-ui] .plan-card .price { font-family: var(--font-display); font-weight: 700; letter-spacing: -.03em; color: var(--ink); }
:root[data-ui] .plan-card li::before { content: "✓ "; color: var(--purple); }
:root[data-ui] .notice, :root[data-ui] p.notice { border-radius: 12px; border: 1px solid var(--line); background: var(--bg-2); box-shadow: none; }
:root[data-ui] .fb-tab { background: var(--ink) !important; color: var(--bg) !important; border-radius: 8px 0 0 8px !important; box-shadow: none !important; font-family: var(--font-body); }
:root[data-ui] .to-top { background: var(--surface); border: 1px solid var(--line); box-shadow: var(--shadow-lg); }
:root[data-ui] .toast { border-radius: 10px; }
:root[data-ui] hr { border: 0; border-top: 1px solid var(--line); }

/* ---------------------------------------------------------------- home page */
:root[data-ui] .at-hero { padding: 72px 0 24px; }
:root[data-ui] .at-hero h1 { font-size: clamp(2.4rem, 5.2vw, 4.2rem); max-width: 16ch; }
:root[data-ui] .at-hero-logo { display: none !important; }
:root[data-ui] .at-hero-art { display: block; }
:root[data-ui] .at-stats > div { padding: 14px 16px; }
:root[data-ui] .at-stats b { font: 700 1.9rem var(--font-display); letter-spacing: -.03em; color: var(--ink); }
:root[data-ui] .at-stats span { font: 500 .78rem var(--font-body); letter-spacing: 0; text-transform: none; color: var(--muted); }
:root[data-ui] .sec-h { margin-top: 64px; }
:root[data-ui] .sec-h h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
:root[data-ui] .at-hero-art { position: relative; }
:root[data-ui] .at-hero-art .wing-art { border: 1px solid var(--line) !important; background: var(--surface) !important; border-radius: 18px; box-shadow: var(--shadow-lg); }
:root[data-ui] .at-hero-art figcaption { margin-top: 10px; font-size: .8rem; color: var(--muted); text-align: center; }

/* ---------------------------------------------------------------- page heroes (hubs, calculators, studios) */
:root[data-ui] .lib-hero, :root[data-ui] .tk-hero, :root[data-ui] .st-hero { background: none !important; border: 0 !important; box-shadow: none !important; }
:root[data-ui] .lib-hero h1, :root[data-ui] .tk-hero h1 { font-size: clamp(2rem, 4.2vw, 3.2rem); }
:root[data-ui] .lib-hero .page-art.wing-art { border: 1px solid var(--line) !important; background: var(--surface) !important; border-radius: 16px; box-shadow: var(--shadow-lg) !important; }

/* ---------------------------------------------------------------- studios and calculators */
:root[data-ui] .cp-top { border-radius: 14px; border: 1px solid var(--line); box-shadow: none; background: color-mix(in srgb, var(--surface) 88%, transparent); }
:root[data-ui] .cp-card h3 { font: 650 1rem var(--font-display); letter-spacing: -.01em; color: var(--ink); }
:root[data-ui] .cp-kpi div { border-radius: 10px; background: var(--bg-2); border-color: transparent; }
:root[data-ui] .cp-kpi b { font: 650 .95rem var(--font-body); font-variant-numeric: tabular-nums; color: var(--ink); }
:root[data-ui] .cp-kpi .good { background: color-mix(in srgb, #16a34a 9%, var(--surface)); border-color: color-mix(in srgb, #16a34a 30%, transparent); }
:root[data-ui] .cp-kpi .good b { color: #15803d; }
:root[data-ui] .cp-kpi .bad { background: color-mix(in srgb, #dc2626 8%, var(--surface)); border-color: color-mix(in srgb, #dc2626 30%, transparent); }
:root[data-ui] .cp-kpi .bad b { color: #b91c1c; }
:root[data-ui][data-mode="dark"] .cp-kpi .good b { color: #4ade80; }
:root[data-ui][data-mode="dark"] .cp-kpi .bad b { color: #f87171; }
:root[data-ui] .cp-tab th, :root[data-ui] table.tbl th, :root[data-ui] .calc-page table th, :root[data-ui] .seo-guide table th, :root[data-ui] .cmp th { background: var(--bg-2) !important; color: var(--ink) !important; font: 600 .72rem var(--font-body) !important; border-bottom: 1px solid var(--line); }
:root[data-ui] .cp-tab td { border-top-color: var(--line); }
:root[data-ui] .rd-eq { border-radius: 10px; border: 1px solid var(--line); background: var(--bg-2); font-family: var(--font-mono); }
:root[data-ui] .jt-fig { border-radius: 12px; border: 1px solid var(--line); box-shadow: none; background: #fff; }
:root[data-ui] .cp-tabs button[aria-pressed="true"], :root[data-ui] .sx-rail button[aria-pressed="true"] { background: var(--ink) !important; color: var(--bg) !important; border-color: var(--ink) !important; }
:root[data-ui] .sx-rail { border-radius: 14px; border: 1px solid var(--line); box-shadow: none; background: var(--surface); }
:root[data-ui] .jt-code.on { border-color: var(--ink) !important; box-shadow: 0 0 0 1px var(--ink) !important; }
:root[data-ui] .st-jump { border-radius: 14px; border: 1px solid var(--line); box-shadow: none; background: color-mix(in srgb, var(--surface) 90%, transparent); }

/* respect reduced motion */
@media (prefers-reduced-motion: reduce) { :root[data-ui] .disc-card:hover, :root[data-ui] .st-card:hover { transform: none; } }

/* ---------------------------------------------------------------- refinements (v43 pass 2) */
:root[data-ui] .hero-canvas, :root[data-ui] #bg-toggle, :root[data-ui] .bg-toggle { display: none !important; }
:root[data-ui] .nav .brand img.lm, :root[data-ui] .foot .brand img.lm { filter: grayscale(1) contrast(1.15); }
:root[data-ui][data-mode="dark"] .nav .brand img.lm, :root[data-ui][data-mode="dark"] .foot .brand img.lm { filter: grayscale(1) brightness(1.6); }
:root[data-ui] .plan-badge { background: var(--ink) !important; color: var(--bg) !important; border: 0 !important; box-shadow: none !important; }
:root[data-ui] .st-groups { grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)) !important; }
:root[data-ui] .at-hero-art { width: 100%; max-width: 460px; justify-self: center; margin: 0; }
:root[data-ui] .ch-fab { background: var(--ink) !important; color: var(--bg) !important; border: 0 !important; box-shadow: var(--shadow-lg) !important; font-family: var(--font-body) !important; }
:root[data-ui] .ch-fab * { color: inherit !important; }
:root[data-ui] .sx-rail h4, :root[data-ui] .sx-rail .sx-h, :root[data-ui] .cp-tg > span { font-family: var(--font-body) !important; letter-spacing: .08em; color: var(--muted) !important; }
:root[data-ui] .quote-band { font-family: var(--font-display); }
:root[data-ui] .quote-band blockquote, :root[data-ui] .quote-band p { font-style: normal; letter-spacing: -.015em; }
:root[data-ui] .plan-badge { font-family: var(--font-body) !important; border-radius: 6px !important; }
:root[data-ui] .nav-user { border-radius: 999px; border: 1px solid var(--line); background: var(--surface); box-shadow: none; }
:root[data-ui] .plan-card li.no::before { content: "– "; color: var(--muted); }

/* ================================================================ v45 — single design system */
:root[data-ui] { --accent: var(--purple); --accent-soft: color-mix(in srgb, var(--purple) 10%, var(--surface)); --ease: cubic-bezier(.2, .7, .2, 1); --wrap: 1240px; }
:root[data-ui] body { font-family: var(--font-body); font-size: 16px; line-height: 1.6; }
:root[data-ui] .wrap { max-width: var(--wrap); }
:root[data-ui] code, :root[data-ui] kbd, :root[data-ui] pre { font-family: "JetBrains Mono", var(--font-mono); }
:root[data-ui] h1 em { color: var(--accent); }
:root[data-ui] .btn.ghost { background: transparent; border-color: transparent !important; color: var(--ink); padding-inline: 10px; }
:root[data-ui] .btn.ghost:hover { background: var(--bg-2); }
:root[data-ui] .muted { color: var(--muted); }

/* ---------- header ---------- */
:root[data-ui] .nav { position: sticky; top: 0; z-index: 60; }
:root[data-ui] .nav .wrap { padding-block: 10px; gap: 20px; }
:root[data-ui] .nav .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; flex: none; }
:root[data-ui] .nav .brand img.lm { width: 30px; height: auto; }
:root[data-ui] .bn { display: inline-flex; align-items: baseline; gap: 5px; font: 700 1.02rem/1 var(--font-body) !important; letter-spacing: -.02em; color: var(--ink); }
:root[data-ui] .bn i { font-style: normal; font-weight: 500; color: var(--muted); }
:root[data-ui] .nav-links { gap: 2px; margin-right: auto; }
:root[data-ui] .nav-links > li > a, :root[data-ui] .nav-dd-btn { display: inline-flex; align-items: center; gap: 4px; padding: 8px 12px !important; font: 500 .92rem/1 var(--font-body) !important; color: var(--muted) !important; border: 0 !important; background: none; box-shadow: none !important; text-decoration: none; }
:root[data-ui] .nav-links > li > a:hover, :root[data-ui] .nav-dd-btn:hover, :root[data-ui] .nav-dd.open .nav-dd-btn { color: var(--ink) !important; background: var(--bg-2) !important; }
:root[data-ui] .nav-links > li > a[aria-current="page"], :root[data-ui] .nav-dd.here .nav-dd-btn { color: var(--ink) !important; font-weight: 600 !important; }
:root[data-ui] .nav-links > li > a::after, :root[data-ui] .nav-dd-btn::after { display: none !important; }
:root[data-ui] .nav-chev { width: 12px; height: 12px; fill: none; stroke: currentColor; stroke-width: 1.6; transition: transform .2s var(--ease); }
:root[data-ui] .nav-dd.open .nav-chev { transform: rotate(180deg); }
:root[data-ui] .nav-dd-menu { padding: 10px !important; animation: dd-in .16s var(--ease); }
@keyframes dd-in { from { opacity: 0; translate: 0 -4px; } to { opacity: 1; translate: 0 0; } }
:root[data-ui] .nav-dd-menu a { font: 500 .88rem/1.3 var(--font-body); color: var(--ink); text-decoration: none; padding: 7px 10px !important; border-radius: 8px; border: 0 !important; margin: 0 !important; }
:root[data-ui] .nav-dd-menu a[aria-current="page"] { background: var(--accent-soft); color: var(--accent); }
:root[data-ui] .nav-dd-h { margin: 2px 10px 6px !important; }
:root[data-ui] .nav-dd-menu .nav-dd-h a { display: inline !important; padding: 0 !important; font: inherit !important; letter-spacing: inherit; text-transform: inherit; color: inherit !important; background: none !important; }
:root[data-ui] .nav-dd-h a:hover { color: var(--ink); }
:root[data-ui] .nav-rich { display: grid !important; gap: 2px; padding: 9px 10px !important; }
:root[data-ui] .nav-rich b { font-weight: 600; }
:root[data-ui] .nav-rich small { color: var(--muted); font-size: .78rem; }
@media (min-width: 861px) {
  :root[data-ui] .nav-dd-menu.nav-mega-st { position: fixed; top: 60px; left: 50%; transform: translateX(-50%); width: min(1180px, calc(100vw - 32px)); display: none; padding: 16px !important; grid-template-columns: 1fr !important; }
  :root[data-ui] .nav-dd.open .nav-dd-menu.nav-mega-st { display: block; }
  :root[data-ui] .nav-cols { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 4px 12px; }
  :root[data-ui] .nav-mega-st .nav-col:nth-child(2) { grid-row: span 1; columns: 1; }
  :root[data-ui] .nav-mega-st .nav-col a { font-size: .84rem; padding: 5px 10px !important; }
  :root[data-ui] .nav-dd-menu.nav-mega-2 { width: min(620px, calc(100vw - 32px)); grid-template-columns: 1.15fr 1fr !important; gap: 4px 14px; }
}
:root[data-ui] .nav-dd-foot { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-top: 12px; padding: 12px 10px 2px; border-top: 1px solid var(--line); font-size: .82rem; color: var(--muted); }
:root[data-ui] .nav-dd-foot a { font-weight: 600; color: var(--accent) !important; padding: 0 !important; }
:root[data-ui] .nav-tools { gap: 6px; }
:root[data-ui] .nav-tools .icon-btn { width: 36px; height: 36px; border-radius: 10px; display: inline-grid; place-items: center; color: var(--ink); }
:root[data-ui] .nav-tools .icon-btn:hover { background: var(--bg-2); }
:root[data-ui] .nav-tools .icon-btn svg { width: 18px; height: 18px; }
:root[data-ui] .theme-toggle .tt-moon, :root[data-ui][data-mode="dark"] .theme-toggle .tt-sun { display: none; }
:root[data-ui][data-mode="dark"] .theme-toggle .tt-moon { display: inline-flex; }
:root[data-ui] .theme-toggle span { display: inline-flex; animation: spin-in .35s var(--ease); }
@keyframes spin-in { from { transform: rotate(-90deg) scale(.6); opacity: 0; } to { transform: none; opacity: 1; } }
:root[data-ui] .cmdk-btn { height: 36px; border-radius: 10px; background: var(--bg-2); border-color: transparent; color: var(--muted); }
:root[data-ui] .cmdk-btn:hover { border-color: var(--line); color: var(--ink); }
:root[data-ui] .cmdk-btn kbd { font-size: .7rem; border-radius: 5px; }
:root[data-ui] .nav-code select, :root[data-ui] .code-pick select { height: 36px; font-size: .84rem; }
:root[data-ui] .theme-pop, :root[data-ui] .nav-more { display: none !important; }
@media (max-width: 1180px) { :root[data-ui] .nav-links > li.nav-sm { display: none; } }
@media (max-width: 860px) {
  :root[data-ui] .nav-links > li.nav-sm { display: block; }
  :root[data-ui] .nav-links { margin: 0; border-radius: 16px !important; border: 1px solid var(--line) !important; box-shadow: var(--shadow-lg) !important; max-height: calc(100vh - 80px); overflow: auto; }
  :root[data-ui] .nav-links .nav-dd-btn { display: flex !important; width: 100%; justify-content: space-between; font-size: 1rem !important; }
  :root[data-ui] .nav-links > li > a { display: flex; font-size: 1rem !important; }
  :root[data-ui] .nav-cols { display: grid; gap: 6px; }
  :root[data-ui] .nav-dd-foot { flex-direction: column; align-items: flex-start; }
  :root[data-ui] .nav-dd-h { display: block !important; }
}

/* ---------- footer ---------- */
:root[data-ui] .foot { margin-top: 96px; padding: 56px 0 28px; }
:root[data-ui] .foot-grid { display: grid; grid-template-columns: 1.6fr repeat(4, 1fr); gap: 32px; }
:root[data-ui] .foot-grid > div { display: flex; flex-direction: column; gap: 8px; }
:root[data-ui] .foot-grid h4 { margin: 0 0 4px; text-transform: uppercase; }
:root[data-ui] .foot-grid a { color: var(--muted); text-decoration: none; font-size: .9rem; }
:root[data-ui] .foot-brand p { color: var(--muted); font-size: .9rem; max-width: 36ch; margin: 6px 0 0; }
:root[data-ui] .foot-codes { display: flex; flex-wrap: wrap; gap: 6px; }
:root[data-ui] .foot-codes span { font: 600 .7rem/1 var(--font-body); letter-spacing: .04em; padding: 5px 8px; border-radius: 6px; border: 1px solid var(--line); color: var(--muted); }
:root[data-ui] .foot-base { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px 24px; margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--muted); }
@media (max-width: 900px) { :root[data-ui] .foot-grid { grid-template-columns: 1fr 1fr; } :root[data-ui] .foot-brand { grid-column: 1 / -1; } }

/* ---------- section headings ---------- */
:root[data-ui] .sec { margin-top: 96px; }
:root[data-ui] .sec > .sec-h, :root[data-ui] .sec-h { display: flex; justify-content: space-between; align-items: flex-end; gap: 16px; margin: 0 0 24px; }
:root[data-ui] .sec .sec-h { margin-top: 0; }
:root[data-ui] .sec-h h2 { margin: 6px 0 0; font-size: clamp(1.6rem, 2.8vw, 2.25rem); letter-spacing: -.03em; }
:root[data-ui] .sec-h p.muted { margin: 8px 0 0; max-width: 60ch; }
:root[data-ui] .sec-n { font-size: .82rem; color: var(--muted); white-space: nowrap; }

/* ---------- home hero ---------- */
:root[data-ui] .hx { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr); gap: 56px; align-items: center; padding: 64px 0 40px; }
:root[data-ui] .hx h1 { font-size: clamp(2.5rem, 5vw, 4.25rem); line-height: 1.02; letter-spacing: -.045em; margin: 18px 0 20px; max-width: 15ch; }
:root[data-ui] .hx .lede { font-size: 1.1rem; max-width: 54ch; margin: 0 0 28px; }
:root[data-ui] .hx .actions { display: flex; flex-wrap: wrap; gap: 10px; }
:root[data-ui] .hx .actions .btn { padding: 12px 18px; font-size: .95rem; }
:root[data-ui] .hx-badge { display: inline-flex; align-items: center; gap: 8px; margin: 0; padding: 6px 12px 6px 10px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); font-size: .8rem; font-weight: 500; color: var(--muted); }
:root[data-ui] .hx-badge i { width: 8px; height: 8px; border-radius: 50%; background: #16a34a; box-shadow: 0 0 0 0 rgba(22, 163, 74, .5); animation: ping 2s infinite; }
@keyframes ping { 0% { box-shadow: 0 0 0 0 rgba(22, 163, 74, .45); } 70% { box-shadow: 0 0 0 8px rgba(22, 163, 74, 0); } 100% { box-shadow: 0 0 0 0 rgba(22, 163, 74, 0); } }
:root[data-ui] .hx-search { display: flex; align-items: center; gap: 10px; width: min(460px, 100%); margin-top: 22px; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--line); background: var(--surface); color: var(--muted); font: inherit; font-size: .92rem; cursor: text; transition: border-color .15s, box-shadow .15s; }
:root[data-ui] .hx-search:hover { border-color: color-mix(in srgb, var(--ink) 25%, var(--line)); box-shadow: var(--shadow-lg); }
:root[data-ui] .hx-search svg { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 2; flex: none; }
:root[data-ui] .hx-search span { flex: 1; text-align: left; }
:root[data-ui] .hx-search kbd, :root[data-ui] .hl kbd { font-size: .72rem; padding: 2px 6px; border-radius: 5px; border: 1px solid var(--line); background: var(--bg-2); color: var(--muted); }
:root[data-ui] .hx-codes { display: flex; gap: 6px; list-style: none; padding: 0; margin: 18px 0 0; }
:root[data-ui] .hx-codes li { font: 600 .72rem/1 var(--font-body); letter-spacing: .04em; padding: 6px 9px; border-radius: 7px; background: var(--bg-2); color: var(--muted); cursor: default; }
:root[data-ui] .kpi-row { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); border: 1px solid var(--line); border-radius: 16px; background: var(--surface); overflow: hidden; }
:root[data-ui] .kpi-row div { padding: 20px 22px; border-left: 1px solid var(--line); }
:root[data-ui] .kpi-row div:first-child { border-left: 0; }
:root[data-ui] .kpi-row b { display: block; font: 700 2rem/1.1 var(--font-body); letter-spacing: -.04em; color: var(--ink); font-variant-numeric: tabular-nums; }
:root[data-ui] .kpi-row span { font-size: .84rem; color: var(--muted); }
@media (max-width: 960px) { :root[data-ui] .hx { grid-template-columns: minmax(0, 1fr); gap: 32px; padding-top: 40px; } :root[data-ui] .kpi-row { grid-template-columns: repeat(2, minmax(0, 1fr)); } :root[data-ui] .kpi-row div { border-left: 0; border-top: 1px solid var(--line); } :root[data-ui] .kpi-row div:nth-child(-n+2) { border-top: 0; } :root[data-ui] .kpi-row div:nth-child(even) { border-left: 1px solid var(--line); } :root[data-ui] .kpi-row div:last-child { grid-column: 1 / -1; border-left: 0; } }

/* ---------- interactive bench (hero-lab.js) ---------- */
:root[data-ui] .hl { position: relative; border: 1px solid var(--line); border-radius: 20px; background: var(--surface); box-shadow: var(--shadow-lg); padding: 14px; display: grid; gap: 10px; }
:root[data-ui] .hl::before { content: ""; position: absolute; inset: -1px; border-radius: inherit; padding: 1px; background: linear-gradient(140deg, color-mix(in srgb, var(--accent) 45%, transparent), transparent 40%); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; pointer-events: none; }
:root[data-ui] .hl-tabs { display: flex; align-items: center; gap: 4px; padding: 3px; border-radius: 11px; background: var(--bg-2); }
:root[data-ui] .hl-tabs button { flex: none; border: 0; background: none; font: 500 .85rem/1 var(--font-body); color: var(--muted); padding: 8px 12px; border-radius: 8px; cursor: pointer; transition: color .15s, background .15s; }
:root[data-ui] .hl-tabs button[aria-selected="true"] { background: var(--surface); color: var(--ink); box-shadow: 0 1px 2px rgba(0, 0, 0, .08); }
:root[data-ui] .hl-live { margin-left: auto; display: inline-flex; align-items: center; gap: 6px; padding-right: 8px; font-size: .72rem; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
:root[data-ui] .hl-live i { width: 7px; height: 7px; border-radius: 50%; background: #16a34a; animation: ping 2s infinite; }
:root[data-ui] .hl-svg { width: 100%; height: auto; display: block; border-radius: 12px; background-color: var(--bg); background-image: linear-gradient(var(--line) 1px, transparent 1px), linear-gradient(90deg, var(--line) 1px, transparent 1px); background-size: 20px 20px; background-position: -1px -1px; touch-action: none; user-select: none; }
:root[data-ui][data-mode="dark"] .hl-svg { background-image: linear-gradient(rgba(255, 255, 255, .05) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, .05) 1px, transparent 1px); }
.hl-t { font: 500 11px "Inter", system-ui, sans-serif; fill: var(--ink); }
.hl-mut { fill: var(--muted); }
.hl-acc { fill: var(--accent, #2563eb); font-weight: 650; }
.hl-ink { stroke: var(--ink); stroke-width: 1.4; fill: none; }
.hl-ghost { stroke: var(--muted); stroke-width: 1; stroke-dasharray: 3 4; opacity: .6; }
.hl-dash { stroke: var(--muted); stroke-width: 1; stroke-dasharray: 3 3; }
.hl-beam { stroke: var(--ink); stroke-width: 4; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.hl-sup { fill: var(--surface, #fff); stroke: var(--ink); stroke-width: 1.4; }
.hl-load { stroke: var(--accent, #2563eb); stroke-width: 2.4; fill: none; stroke-linecap: round; stroke-linejoin: round; }
.hl-knob { fill: var(--accent, #2563eb); stroke: var(--surface, #fff); stroke-width: 2; }
.hl-fill { fill: color-mix(in srgb, var(--accent, #2563eb) 16%, transparent); stroke: var(--accent, #2563eb); stroke-width: 1.4; }
.hl-soil { fill: color-mix(in srgb, #a16207 14%, var(--surface, #fff)); stroke: color-mix(in srgb, #a16207 50%, var(--ink)); stroke-width: 1; }
.hl-water { fill: color-mix(in srgb, #0ea5e9 26%, transparent); }
.hl-wsurf { stroke: #0284c7; stroke-width: 2; }
.hl-conc { fill: color-mix(in srgb, var(--muted) 22%, var(--surface, #fff)); stroke: var(--ink); stroke-width: 1.4; }
.hl-tracer { fill: #0284c7; opacity: .7; animation: tracer linear infinite; }
@keyframes tracer { from { transform: translateX(-30px); opacity: 0; } 20% { opacity: .8; } 80% { opacity: .8; } to { transform: translateX(30px); opacity: 0; } }
.hl-handle { cursor: grab; outline: none; }
.hl-handle:hover .hl-knob, .hl-handle:focus-visible .hl-knob { filter: drop-shadow(0 0 0 4px rgba(37, 99, 235, .3)); r: 8; }
.hl-handle:focus-visible .hl-knob { stroke: var(--ink); }
.hl.dragging, .hl.dragging .hl-handle { cursor: grabbing; }
:root[data-ui] .hl-ctl { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 6px 16px; padding: 0 4px; }
:root[data-ui] .hl-ctl label { display: flex; align-items: center; gap: 10px; font-size: .84rem; color: var(--muted); }
:root[data-ui] .hl-ctl input[type=range] { width: 150px; }
:root[data-ui] .hl-ctl output { font: 600 .84rem var(--font-body); color: var(--ink); font-variant-numeric: tabular-nums; min-width: 56px; }
:root[data-ui] .hl-hint { margin: 0; font-size: .78rem; color: var(--muted); }
:root[data-ui] .hl-kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(92px, 1fr)); gap: 6px; }
:root[data-ui] .hl-kpis div { padding: 8px 10px; border-radius: 10px; background: var(--bg-2); border: 1px solid transparent; }
:root[data-ui] .hl-kpis span { display: block; font-size: .7rem; color: var(--muted); }
:root[data-ui] .hl-kpis b { font: 650 .9rem/1.3 var(--font-body); font-variant-numeric: tabular-nums; color: var(--ink); }
:root[data-ui] .hl-kpis .ok { background: color-mix(in srgb, #16a34a 9%, var(--surface)); border-color: color-mix(in srgb, #16a34a 25%, transparent); }
:root[data-ui] .hl-kpis .ok b { color: #15803d; }
:root[data-ui] .hl-kpis .ng { background: color-mix(in srgb, #dc2626 8%, var(--surface)); border-color: color-mix(in srgb, #dc2626 25%, transparent); }
:root[data-ui] .hl-kpis .ng b { color: #b91c1c; }
:root[data-ui][data-mode="dark"] .hl-kpis .ok b { color: #4ade80; }
:root[data-ui][data-mode="dark"] .hl-kpis .ng b { color: #f87171; }
:root[data-ui] .hl-cta { justify-self: start; padding: 2px 4px; font-size: .86rem; font-weight: 600; color: var(--accent); text-decoration: none; }
:root[data-ui] .hl-cta:hover { text-decoration: underline; }

/* ---------- discipline explorer ---------- */
:root[data-ui] .dx { display: grid; grid-template-columns: 280px minmax(0, 1fr); border: 1px solid var(--line); border-radius: 20px; background: var(--surface); overflow: hidden; min-height: 460px; }
:root[data-ui] .dx-tabs { display: flex; flex-direction: column; gap: 2px; padding: 10px; border-right: 1px solid var(--line); background: var(--bg); }
:root[data-ui] .dx-tabs button { display: grid; grid-template-columns: 44px 1fr; grid-template-rows: auto auto; column-gap: 12px; align-items: center; text-align: left; padding: 10px; border: 1px solid transparent; border-radius: 12px; background: none; font: inherit; color: var(--ink); cursor: pointer; transition: background .15s, border-color .15s; }
:root[data-ui] .dx-tabs button:hover { background: var(--bg-2); }
:root[data-ui] .dx-tabs button[aria-selected="true"] { background: var(--surface); border-color: var(--line); box-shadow: var(--shadow); }
:root[data-ui] .dx-tabs .dx-ic { grid-row: span 2; width: 44px; height: 44px; border-radius: 10px; overflow: hidden; }
:root[data-ui] .dx-tabs b { font-size: .92rem; font-weight: 600; }
:root[data-ui] .dx-tabs small { font-size: .76rem; color: var(--muted); }
:root[data-ui] .dx-panels { padding: 26px 28px; min-width: 0; }
:root[data-ui] .dx-p { animation: fade-up .25s var(--ease); }
@keyframes fade-up { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: none; } }
:root[data-ui] .dx-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 20px; margin-bottom: 18px; }
:root[data-ui] .dx-top h3 { margin: 0 0 4px; font-size: 1.4rem; letter-spacing: -.025em; }
:root[data-ui] .dx-top p { margin: 0; color: var(--muted); max-width: 60ch; }
:root[data-ui] .dx-top .btn { flex: none; }
:root[data-ui] .dx-st { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 8px; }
:root[data-ui] .dx-st a { display: grid; gap: 3px; height: 100%; padding: 12px 14px; border-radius: 12px; border: 1px solid var(--line); text-decoration: none; color: var(--ink); transition: border-color .15s, background .15s, transform .15s; }
:root[data-ui] .dx-st a:hover { border-color: color-mix(in srgb, var(--accent) 45%, var(--line)); background: var(--accent-soft); transform: translateY(-1px); }
:root[data-ui] .dx-st b { font-size: .9rem; font-weight: 600; }
:root[data-ui] .dx-st small { font-size: .78rem; color: var(--muted); line-height: 1.4; }
:root[data-ui] .dx-calc { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin: 18px 0 0; padding-top: 16px; border-top: 1px solid var(--line); }
:root[data-ui] .dx-calc span { font-size: .72rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); margin-right: 6px; }
:root[data-ui] .dx-calc a { font-size: .8rem; padding: 5px 10px; border-radius: 999px; background: var(--bg-2); color: var(--ink); text-decoration: none; }
:root[data-ui] .dx-calc a:hover { background: var(--accent-soft); color: var(--accent); }
@media (max-width: 860px) { :root[data-ui] .dx { grid-template-columns: minmax(0, 1fr); } :root[data-ui] .dx-tabs { flex-direction: row; overflow-x: auto; border-right: 0; border-bottom: 1px solid var(--line); scrollbar-width: none; } :root[data-ui] .dx-tabs button { grid-template-columns: 1fr; flex: none; } :root[data-ui] .dx-tabs .dx-ic { display: none; } :root[data-ui] .dx-panels { padding: 18px; } :root[data-ui] .dx-top { flex-direction: column; } }

/* ---------- studio cards ---------- */
:root[data-ui] .st-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(270px, 1fr)); gap: 14px; }
:root[data-ui] .st-card { display: flex !important; flex-direction: column; gap: 6px; padding: 12px 12px 16px !important; text-decoration: none; color: var(--ink); transition: border-color .2s, box-shadow .2s, transform .2s var(--ease) !important; }
:root[data-ui] .st-card .wing-art { height: 150px; margin: 0 0 8px; }
:root[data-ui] .st-card .no, :root[data-ui] .st-card b, :root[data-ui] .st-card small, :root[data-ui] .st-card em { padding-inline: 4px; }
:root[data-ui] .st-card b { font-size: 1rem; line-height: 1.3; }
:root[data-ui] .st-card small { color: var(--muted); font-size: .84rem; line-height: 1.45; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
:root[data-ui] .st-card em { margin-top: auto; padding-top: 6px; font-style: normal; }
:root[data-ui] .st-card em span { display: inline-block; transition: transform .2s var(--ease); }
:root[data-ui] .st-card:hover em span { transform: translateX(4px); }
:root[data-ui] .st-card[hidden] { display: none !important; }

/* ---------- page heads (hubs, studios hub) ---------- */
:root[data-ui] .page-head { padding: 56px 0 24px; max-width: 900px; }
:root[data-ui] .page-head h1 { max-width: none; }
:root[data-ui] .page-head h1 { font-size: clamp(2.2rem, 4.6vw, 3.6rem); letter-spacing: -.04em; margin: 10px 0 14px; }
:root[data-ui] .page-head .lede { font-size: 1.08rem; margin: 0; }
:root[data-ui] .st-filter { position: sticky; top: 57px; z-index: 20; display: grid; gap: 12px; padding: 14px 0; margin-bottom: 8px; background: color-mix(in srgb, var(--bg) 88%, transparent); backdrop-filter: blur(10px); border-bottom: 1px solid var(--line); }
:root[data-ui] .sf-q { display: flex; align-items: center; gap: 10px; padding: 0 14px; height: 48px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); transition: border-color .15s, box-shadow .15s; }
:root[data-ui] .sf-q:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent); }
:root[data-ui] .sf-q svg { width: 18px; height: 18px; fill: none; stroke: var(--muted); stroke-width: 2; flex: none; }
:root[data-ui] .sf-q input { flex: 1; min-width: 0; border: 0 !important; outline: 0 !important; background: none; font: inherit; font-size: 1rem; color: var(--ink); box-shadow: none !important; padding: 0 !important; }
:root[data-ui] .sf-q output { font-size: .8rem; color: var(--muted); white-space: nowrap; }
:root[data-ui] .sf-chips { display: flex; flex-wrap: wrap; gap: 6px; }
:root[data-ui] .sf-chips button { display: inline-flex; align-items: center; gap: 6px; padding: 7px 12px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); font: 500 .84rem/1 var(--font-body); color: var(--ink); cursor: pointer; transition: all .15s; }
:root[data-ui] .sf-chips button span { font-size: .72rem; color: var(--muted); }
:root[data-ui] .sf-chips button:hover { border-color: color-mix(in srgb, var(--ink) 30%, var(--line)); }
:root[data-ui] .sf-chips button[aria-pressed="true"] { background: var(--ink); border-color: var(--ink); color: var(--bg); }
:root[data-ui] .sf-chips button[aria-pressed="true"] span { color: color-mix(in srgb, var(--bg) 70%, transparent); }
:root[data-ui] .st-sec { margin-top: 48px; scroll-margin-top: 180px; }
:root[data-ui] .st-sec[hidden] { display: none; }
:root[data-ui] .st-empty { padding: 40px; text-align: center; color: var(--muted); border: 1px dashed var(--line); border-radius: 16px; margin-top: 32px; }
:root[data-ui] .how { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; margin-top: 56px; }
:root[data-ui] .sec .how { margin-top: 0; }
:root[data-ui] .how > div { padding: 22px; border-radius: 16px; border: 1px solid var(--line); background: var(--surface); }
:root[data-ui] .how span { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 8px; background: var(--accent-soft); color: var(--accent); font-weight: 700; font-size: .85rem; }
:root[data-ui] .how b { display: block; margin: 14px 0 4px; font-size: 1.05rem; letter-spacing: -.01em; }
:root[data-ui] .how p { margin: 0; color: var(--muted); font-size: .9rem; }
@media (max-width: 860px) { :root[data-ui] .how { grid-template-columns: 1fr 1fr; } }

/* ---------- studio pages: switcher + compact head ---------- */
:root[data-ui] .st-switch { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 18px 0 0; }
:root[data-ui] .crumb { display: flex; flex-wrap: wrap; align-items: center; gap: 2px; list-style: none; margin: 0; padding: 0; font-size: .86rem; color: var(--muted); }
:root[data-ui] .crumb li { display: inline-flex; align-items: center; }
:root[data-ui] .crumb li + li::before { content: "/"; margin: 0 8px; color: color-mix(in srgb, var(--muted) 60%, transparent); }
:root[data-ui] .crumb a { color: var(--muted); text-decoration: none; }
:root[data-ui] .crumb a:hover { color: var(--ink); }
:root[data-ui] .st-pick { position: relative; }
:root[data-ui] .st-pick summary { list-style: none; display: inline-flex; align-items: center; gap: 6px; padding: 5px 10px; margin: -5px 0; border-radius: 8px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); font-weight: 600; cursor: pointer; }
:root[data-ui] .st-pick summary::-webkit-details-marker { display: none; }
:root[data-ui] .st-pick summary svg { width: 12px; height: 12px; fill: none; stroke: currentColor; stroke-width: 1.6; transition: transform .2s; }
:root[data-ui] .st-pick[open] summary svg { transform: rotate(180deg); }
:root[data-ui] .st-pick-menu { position: absolute; z-index: 70; top: calc(100% + 10px); left: 0; width: min(760px, calc(100vw - 32px)); max-height: min(70vh, 560px); overflow: auto; padding: 12px; border-radius: 14px; border: 1px solid var(--line); background: var(--surface); box-shadow: var(--shadow-lg); columns: 3 200px; column-gap: 14px; animation: dd-in .16s var(--ease); }
:root[data-ui] .sp-q { display: block; column-span: all; width: 100%; margin-bottom: 10px; padding: 9px 12px !important; font-size: .9rem; }
:root[data-ui] .sp-g { break-inside: avoid; margin-bottom: 10px; }
:root[data-ui] .sp-g p { margin: 4px 8px 4px; font-size: .68rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); }
:root[data-ui] .sp-g a { display: block; padding: 5px 8px; border-radius: 7px; font-size: .86rem; color: var(--ink); text-decoration: none; }
:root[data-ui] .sp-g a:hover { background: var(--bg-2); }
:root[data-ui] .sp-g a[aria-current="page"] { background: var(--accent-soft); color: var(--accent); font-weight: 600; }
:root[data-ui] .sp-g[hidden], :root[data-ui] .sp-g a[hidden] { display: none; }
:root[data-ui] .st-step { display: inline-flex; gap: 4px; }
:root[data-ui] .st-step a { display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 9px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); text-decoration: none; font-size: 1.1rem; line-height: 1; }
:root[data-ui] .st-step a:hover { background: var(--bg-2); }
:root[data-ui] .st-head { padding: 22px 0 18px !important; margin: 0 !important; display: block !important; min-height: 0 !important; }
:root[data-ui] .st-head .page-art, :root[data-ui] .st-head > .wing-art, :root[data-ui] .st-head .hub-art { display: none !important; }
:root[data-ui] .st-head .eyebrow { display: none !important; }
:root[data-ui] .st-head h1 { font-size: clamp(1.8rem, 3.4vw, 2.6rem) !important; letter-spacing: -.035em; margin: 0 0 10px !important; max-width: none !important; }
:root[data-ui] .st-head > p:not(.eyebrow) { max-width: 92ch !important; margin: 0 !important; font-size: .98rem; color: var(--muted); }
:root[data-ui] .st-head > p.clamp { display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
:root[data-ui] .more-btn { margin: 6px 0 0; padding: 0; border: 0; background: none; font: 600 .84rem var(--font-body); color: var(--accent); cursor: pointer; }
:root[data-ui] .st-note { display: inline-block; margin: 12px 0 0; font-size: .86rem; color: var(--muted); }
:root[data-ui] .st-note summary { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; padding: 4px 10px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); list-style: none; font-weight: 500; }
:root[data-ui] .st-note summary::-webkit-details-marker { display: none; }
:root[data-ui] .st-note summary::before { content: "i"; display: inline-grid; place-items: center; width: 16px; height: 16px; border-radius: 50%; background: var(--bg-2); font: 700 .7rem/1 var(--font-body); color: var(--ink); }
:root[data-ui] .st-note[open] p { margin: 10px 0 0; max-width: 80ch; padding: 12px 14px; border-radius: 12px; background: var(--bg-2); }
:root[data-ui] .st-head .notice { margin-top: 12px; font-size: .86rem; }
:root[data-ui] .st-tabs, :root[data-ui] .st-tabs-g { display: none !important; }
@media (max-width: 640px) { :root[data-ui] .st-pick-menu { position: fixed; left: 16px; right: 16px; top: 120px; width: auto; columns: 1; } }

/* ---------- discipline hubs and calculator pages ---------- */
:root[data-ui] .hub-hero { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 40px; align-items: center; padding: 48px 0 20px; background: none !important; border: 0 !important; }
:root[data-ui] .hub-hero h1 { font-size: clamp(2.2rem, 4.4vw, 3.4rem); letter-spacing: -.04em; margin: 10px 0 12px; }
:root[data-ui] .hub-art .wing-art { height: 200px; border: 1px solid var(--line) !important; background: var(--surface) !important; border-radius: 18px; }
@media (max-width: 860px) { :root[data-ui] .hub-hero { grid-template-columns: minmax(0, 1fr); } :root[data-ui] .hub-art { display: none; } }
:root[data-ui] .hub-tabs:not(.st-tabs) { display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0 20px; }
:root[data-ui] .hub-tabs:not(.st-tabs) a { padding: 7px 13px; border-radius: 999px; border: 1px solid var(--line); background: var(--surface); color: var(--ink); text-decoration: none; font-size: .86rem; font-weight: 500; }
:root[data-ui] .hub-tabs:not(.st-tabs) a[aria-current="page"] { background: var(--ink); color: var(--bg); border-color: var(--ink); }
:root[data-ui] .hub-quick { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 10px; }
:root[data-ui] .hub-quick a { display: grid; gap: 2px; align-content: start; padding: 14px 16px; text-decoration: none; color: var(--ink); }
:root[data-ui] .hub-quick span { font-size: .68rem; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--accent); }
:root[data-ui] .hub-quick small { color: var(--muted); }
:root[data-ui] .ornament { margin: 48px 0 20px; font-size: .72rem !important; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; justify-content: flex-start !important; }
:root[data-ui] .lib-hero { padding-top: 48px; }

/* ---------- misc polish ---------- */
:root[data-ui] .quote-band { margin: 96px auto 0; max-width: 860px; padding: 32px 36px !important; font-size: 1.15rem; line-height: 1.55; color: var(--ink); text-align: left; }
:root[data-ui] .quote-band cite { display: block; margin-top: 12px; font-size: .86rem; font-style: normal; color: var(--muted); }
:root[data-ui] .plans { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 14px; max-width: 760px; }
:root[data-ui] .plan-card { padding: 26px !important; }
:root[data-ui] .rv { transition-timing-function: var(--ease) !important; }
:root[data-ui] .fb-tab { font-size: .72rem !important; letter-spacing: .06em; opacity: .85; }
:root[data-ui] .fb-tab:hover { opacity: 1; }
:root[data-ui] .to-top { width: 42px; height: 42px; border-radius: 12px; }
:root[data-ui] .ch-fab { border-radius: 12px !important; }
:root[data-ui] .wing-art svg text { font-family: "Inter", system-ui, sans-serif; }
:root[data-ui].theme-anim, :root[data-ui].theme-anim * { transition: background-color .3s, border-color .3s, color .3s, fill .3s !important; }
:focus-visible { outline: 2px solid color-mix(in srgb, var(--purple, #2563eb) 70%, transparent); outline-offset: 2px; }
@media (prefers-reduced-motion: reduce) { :root[data-ui] * { animation: none !important; } }

:root[data-ui] .hub-quick b { color: var(--ink) !important; font: 600 .95rem/1.3 var(--font-body) !important; }
:root[data-ui] .hub-quick span { font-family: var(--font-body) !important; }
:root[data-ui] .hub-quick a:hover b { color: var(--accent) !important; }

/* footer layout and onsite yard palette */
:root[data-ui] footer.foot { background: transparent !important; backdrop-filter: none !important; box-shadow: none !important; }
:root[data-ui] footer.foot .wrap { display: block; }
:root[data-ui] .foot .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
:root[data-ui] .foot-grid { padding: 0; }
:root[data-ui] .os-stage { background: #f8fafc; }
:root[data-ui] .os-msg { color: #0f172a; background: #f1f5f9; border-top-color: #e2e8f0; }
:root[data-ui] .os-t.os-h { font-family: "Inter", system-ui, sans-serif; fill: #0f172a; }
:root[data-ui] .os-t.os-dim { fill: #1d4ed8; }
:root[data-ui] .os-side h3, :root[data-ui] .os-inputs b, :root[data-ui] .os-stats dd { font-family: var(--font-body); }
:root[data-ui] .os-side h3 { letter-spacing: .08em; color: var(--muted); font-size: .7rem; }
:root[data-ui] .quote-band, :root[data-ui] .quote-band * { font-style: normal !important; }
:root[data-ui] .quote-band cite { font-family: var(--font-body) !important; letter-spacing: 0 !important; }
:root[data-ui] .home .st-grid { grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); }
@media (max-width: 760px) { :root[data-ui] .home .st-grid { grid-template-columns: minmax(0, 1fr); } }

:root[data-ui] .nav-dd-h { border: 0 !important; padding: 0 !important; }
:root[data-ui] .nav-dd-foot a { text-decoration: none !important; border: 0 !important; background: none !important; }
:root[data-ui] .nav-dd-foot a:hover { text-decoration: underline !important; }
@media (max-width: 860px) {
  :root[data-ui] .nav .wrap { gap: 8px; }
  :root[data-ui] .nav-links { position: fixed !important; left: 12px !important; right: 12px !important; top: 62px !important; margin: 0 !important; }
  :root[data-ui] .nav-tools { gap: 4px; margin-left: auto; }
}
@media (max-width: 520px) {
  :root[data-ui] .nav .bn i { display: none; }
  :root[data-ui] .nav-user .plan-badge { display: none; }
  :root[data-ui] .fb-tab { display: none !important; }
  :root[data-ui] .hx h1 { font-size: 2.4rem; }
  :root[data-ui] .crumb li:nth-child(2) { display: none; }
}
html, body { overflow-x: clip; }

/* pile studio 3D panels (v47) */
:root[data-ui] .pl3d-opts { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 4px 0 10px; }
:root[data-ui] .pl3d-opts .cp-chk { display: inline-flex; align-items: center; gap: 7px; width: auto; white-space: nowrap; font-size: .86rem; }
:root[data-ui] .pl3d-bar { flex-wrap: wrap; gap: 6px; }
:root[data-ui] .pl3d { width: 100%; border-radius: 12px; overflow: hidden; border: 1px solid var(--line); background: var(--surface); }
:root[data-ui] .pl3d canvas { display: block; width: 100% !important; touch-action: none; }
.sp-hist { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(100%, 250px), 1fr)); gap: 10px; }
.sp-hist .cp-fig svg { width: 100%; height: auto; display: block; }
.sp-legs { display: flex; flex-wrap: wrap; gap: 6px 14px; margin: 10px 0 2px; font-size: 13px; }
.sp-leg { display: inline-flex; align-items: center; gap: 6px; }
.sp-leg i { width: 14px; height: 14px; border-radius: 3px; border: 1px solid rgba(0,0,0,.25); display: inline-block; }
.ss-ex { display: inline-flex; flex-wrap: wrap; gap: 4px; align-items: center; font-size: 12px; white-space: nowrap; }
.ss-ex input { padding: 2px 4px; }
.ss-ex.ss-g { display: grid; grid-template-columns: auto 56px auto 56px; gap: 4px 6px; white-space: nowrap; }
.ss-ex.ss-g input { width: 56px; }