:root {
  --bg: #f6f8fb; --card: #ffffff; --fg: #14202e; --muted: #5d6b7c; --line: #dfe5ec;
  --brand: #1456b8; --brand-fg: #ffffff; --ok: #1a8f3c; --bad: #d12f2f; --soft: #e8f0fc;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0e141b; --card: #151d27; --fg: #e7ecf2; --muted: #93a1b3; --line: #263241;
    --brand: #5b9bff; --brand-fg: #08121f; --ok: #46c06a; --bad: #ff6b6b; --soft: #16263d;
  }
}
:root[data-theme="dark"] {
  --bg: #0e141b; --card: #151d27; --fg: #e7ecf2; --muted: #93a1b3; --line: #263241;
  --brand: #5b9bff; --brand-fg: #08121f; --ok: #46c06a; --bad: #ff6b6b; --soft: #16263d;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; background: var(--bg); color: var(--fg); font: 16px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
a { color: var(--brand); }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 16px; }

header.top { border-bottom: 1px solid var(--line); background: var(--card); }
header.top .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 60px; }
.logo { font-weight: 700; letter-spacing: .2px; text-decoration: none; color: var(--fg); }
.logo span { color: var(--brand); }
nav a { margin-left: 18px; text-decoration: none; color: var(--muted); font-size: 14px; }
nav a:hover { color: var(--fg); }

.hero { padding: 56px 0 36px; }
.eyebrow { color: var(--brand); font-weight: 600; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; }
h1 { font-size: clamp(28px, 5vw, 44px); line-height: 1.15; margin: 8px 0 14px; max-width: 24ch; }
.lead { color: var(--muted); max-width: 62ch; font-size: 18px; margin: 0; }

h2 { font-size: 22px; margin: 40px 0 14px; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 16px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 18px; display: flex; flex-direction: column; gap: 8px; }
.card h3 { margin: 0; font-size: 17px; }
.card p { margin: 0; color: var(--muted); font-size: 14.5px; flex: 1; }
.card a.btn { align-self: flex-start; }
.tag { display: inline-block; font-size: 12px; padding: 2px 9px; border-radius: 99px; background: var(--soft); color: var(--brand); width: fit-content; }
.tag.planned { background: transparent; border: 1px dashed var(--line); color: var(--muted); }
.card.planned { opacity: .75; }

.btn { display: inline-block; padding: 9px 16px; border-radius: 8px; background: var(--brand); color: var(--brand-fg); text-decoration: none; font-weight: 600; font-size: 14px; border: 0; cursor: pointer; }
.btn.ghost { background: transparent; color: var(--fg); border: 1px solid var(--line); }
.btn:focus-visible, button:focus-visible, a:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }

/* PPE page */
.crumbs { font-size: 14px; color: var(--muted); padding: 20px 0 0; }
.demo { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px; margin-top: 18px; }
.pair { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 720px) { .pair { grid-template-columns: 1fr; } }
figure { margin: 0; }
figcaption { font-size: 13px; color: var(--muted); margin-bottom: 6px; font-weight: 600; }
.frame { position: relative; background: #0b0f14; border-radius: 8px; overflow: hidden; aspect-ratio: 4 / 3; }
.frame img { width: 100%; height: 100%; object-fit: contain; display: block; }
.controls { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin-top: 12px; }
.controls button { font: inherit; font-size: 14px; padding: 7px 14px; border-radius: 8px; border: 1px solid var(--line); background: var(--card); color: var(--fg); cursor: pointer; }
.progress { flex: 1; min-width: 120px; height: 4px; background: var(--line); border-radius: 4px; overflow: hidden; }
.progress i { display: block; height: 100%; width: 0; background: var(--brand); }
.summary { margin-top: 12px; display: flex; flex-wrap: wrap; gap: 8px; font-size: 14px; }
.pill { padding: 3px 11px; border-radius: 99px; color: #fff; font-weight: 600; font-size: 13px; }
.pill.ok { background: var(--ok); } .pill.bad { background: var(--bad); } .pill.neutral { background: var(--muted); }
.credit { font-size: 12px; color: var(--muted); margin-top: 8px; }
.empty { padding: 48px 16px; text-align: center; color: var(--muted); }
.steps { counter-reset: s; list-style: none; padding: 0; display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.steps li { counter-increment: s; background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; font-size: 14.5px; color: var(--muted); }
.steps li::before { content: counter(s); display: block; font-weight: 700; color: var(--brand); font-size: 18px; margin-bottom: 4px; }
.steps b { color: var(--fg); display: block; }
.legend span { display: inline-flex; align-items: center; gap: 6px; margin-right: 14px; font-size: 14px; }
.legend i { width: 14px; height: 14px; border-radius: 3px; display: inline-block; }
footer { border-top: 1px solid var(--line); margin-top: 56px; padding: 22px 0 40px; color: var(--muted); font-size: 13px; }