/* AI Engineering page */
:root{--svg-box:#f7f7fa;--svg-stroke:#e6e6ec;--svg-line:#9a9cab;--hover-line:#cfd6e6;--validate-bg:#f3fbf6;--validate-line:#d6efe0;--cap-bg:rgba(255,255,255,.92)}
.toc{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:30px}
.toc a{font-size:14px;font-weight:500;text-decoration:none;color:var(--ink2);background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:7px 15px}
.toc a:hover{border-color:var(--hover-line);color:var(--blue)}

main.wrap > section{padding:96px 0 40px}
.diagram{background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:24px;overflow-x:auto;box-shadow:var(--shadow)}
.diagram svg{display:block;width:100%;height:auto;min-width:640px}
svg text{font-family:Geist,Inter,system-ui,sans-serif}
.svg-ink{fill:var(--ink)} .svg-muted{fill:var(--muted)} .svg-box{fill:var(--svg-box);stroke:var(--svg-stroke)} .svg-surface{fill:var(--surface)} .svg-surface-box{fill:var(--surface);stroke:var(--svg-stroke)}
.svg-line{stroke:var(--svg-line);fill:none}

.case{padding:88px 0 24px;scroll-margin-top:80px}
.case-head{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:end;margin-bottom:28px}
.case .tag{margin-bottom:14px}
.case h3{font-size:clamp(28px,3.4vw,38px);font-weight:500;letter-spacing:-.025em;line-height:1.1;margin:0 0 12px}
.case .task{color:var(--ink2);margin:0}
.metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.metric{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:16px 18px;box-shadow:var(--shadow)}
.metric b{display:block;font-size:28px;font-weight:600;letter-spacing:-.03em}
.metric span{font-size:13px;color:var(--muted)}

.shots{display:grid;grid-template-columns:2fr 1fr;grid-auto-rows:1fr;gap:14px;margin:8px 0 22px}
.shots.two{grid-template-columns:1fr 1fr}
.shot{position:relative;margin:0;border-radius:18px;overflow:hidden;border:1px solid var(--line);background:#0b0d12;cursor:zoom-in;box-shadow:var(--shadow)}
.shot img{width:100%;height:100%;object-fit:cover;object-position:left top;transition:transform .5s}
.shot:hover img{transform:scale(1.03)}
.shot.light{background:#fff}
.shot.light img{object-fit:contain;padding:12px}
.shot figcaption{position:absolute;left:10px;bottom:10px;font-size:12.5px;font-weight:500;color:var(--ink);background:var(--cap-bg);backdrop-filter:blur(6px);border:1px solid var(--line);border-radius:999px;padding:5px 12px}
.shots .big{grid-row:span 2}

.panels{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:16px}
.panel{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:26px;box-shadow:var(--shadow)}
.panel h4{font:600 12px/1 var(--mono);letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:0 0 16px}
.panel.validate{background:linear-gradient(180deg,var(--validate-bg),var(--surface) 60%);border-color:var(--validate-line)}
.panel.validate h4{color:var(--green)}
.checks{list-style:none;margin:0;padding:0}
.checks li{position:relative;padding:0 0 10px 28px;font-size:15px;color:var(--ink2)}
.checks li::before{content:"";position:absolute;left:0;top:3px;width:18px;height:18px;border-radius:50%;background:var(--green);-webkit-mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2a10 10 0 1 0 0 20 10 10 0 0 0 0-20zm-1.4 14.2-4.2-4.2 1.4-1.4 2.8 2.8 6-6 1.4 1.4z'/%3E%3C/svg%3E") center/contain no-repeat;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M12 2a10 10 0 1 0 0 20 10 10 0 0 0 0-20zm-1.4 14.2-4.2-4.2 1.4-1.4 2.8 2.8 6-6 1.4 1.4z'/%3E%3C/svg%3E") center/contain no-repeat}
.panel:not(.validate) .checks li::before{background:var(--grad);-webkit-mask:none;mask:none;width:7px;height:7px;top:9px;left:6px}
.panel .chips{margin:0 0 16px}

.principles{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.principle{background:var(--surface);border:1px solid var(--line);border-radius:20px;padding:28px;box-shadow:var(--shadow);text-align:center}
.principle .n{display:inline-block;font:600 13px var(--mono);color:var(--blue);border:1px solid var(--line);border-radius:999px;padding:5px 13px;margin-bottom:16px}
.principle svg{display:block;width:44px;height:44px;margin:0 auto 14px}
.principle h3{font-size:19px;margin:0 0 6px}
.principle p{margin:0;color:var(--muted);font-size:15px}

.lb{position:fixed;inset:0;background:rgba(12,14,20,.88);display:none;align-items:center;justify-content:center;padding:24px;z-index:60;cursor:zoom-out}
.lb.on{display:flex}
.lb img{max-height:86vh;border-radius:14px}
.lb p{position:absolute;bottom:18px;left:0;right:0;text-align:center;color:#d5d8e2;font-size:14px;margin:0}

@media (max-width:900px){
  .case-head,.panels,.principles{grid-template-columns:1fr}
  .shots,.shots.two{grid-template-columns:1fr}
  .shots .big{grid-row:auto}
  .diagram::after{content:"← swipe to see the full diagram →";display:block;text-align:center;font-size:12px;color:var(--muted);margin-top:10px}
}

:root[data-theme="dark"]{--svg-box:#1a1c23;--svg-stroke:#2c2e38;--svg-line:#6c6f7d;--hover-line:#3a4258;--validate-bg:#0f2018;--validate-line:#1f4430;--cap-bg:rgba(20,22,27,.9)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--svg-box:#1a1c23;--svg-stroke:#2c2e38;--svg-line:#6c6f7d;--hover-line:#3a4258;--validate-bg:#0f2018;--validate-line:#1f4430;--cap-bg:rgba(20,22,27,.9)}}
.checks li a{color:var(--blue);text-decoration:none;font-weight:500}
.checks li a:hover{text-decoration:underline}