/* Maker Lab — clear-glass family: true black, glass cards, one amber accent.
   Design law: no emojis; drawn SVG icons; rounded; plain words. */
* { box-sizing: border-box; margin: 0; padding: 0; }
:root {
  --amber: #f0a832; --amber-soft: rgba(240,168,50,.14);
  --glass: rgba(255,255,255,.06); --edge: rgba(255,255,255,.5);
  --ink: #f4f4f2; --dim: rgba(244,244,242,.62); --err: #ff7a6b;
  --radius: 20px;
}
html { -webkit-text-size-adjust: 100%; }
body {
  background: #000; color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, sans-serif;
  font-size: 17px; line-height: 1.45; min-height: 100vh;
}
button, input, textarea { font: inherit; color: inherit; }
a { color: var(--amber); }
[hidden] { display: none !important; }
.view { min-height: 100vh; }

/* ---------- glass ---------- */
.glass {
  background: var(--glass); border: 1px solid var(--edge); border-radius: var(--radius);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  box-shadow: inset 0 1px 0 rgba(255,255,255,.25);
}
.card { padding: 18px; margin: 0 16px 14px; }
.card-h { font-size: 19px; margin-bottom: 8px; }
.body-copy { margin: 6px 0; }
.dim { color: var(--dim); }
.small { font-size: 13.5px; }
.err { color: var(--err); margin: 8px 0; }

/* ---------- auth ---------- */
.auth-wrap { max-width: 430px; margin: 0 auto; padding: 48px 20px 32px; text-align: center; }
.brand-mark { margin-bottom: 10px; }
.app-name { font-size: 34px; letter-spacing: .2px; }
.tagline { color: var(--dim); margin: 8px 0 22px; }
.auth-card { text-align: left; margin: 0; }
.seg { display: flex; background: rgba(255,255,255,.08); border-radius: 12px; padding: 3px; margin-bottom: 16px; }
.seg-btn { flex: 1; border: 0; background: transparent; padding: 9px; border-radius: 9px; color: var(--dim); cursor: pointer; }
.seg-btn.active { background: rgba(255,255,255,.16); color: var(--ink); }
.fld { display: block; margin-bottom: 14px; }
.fld span { display: block; font-size: 14px; color: var(--dim); margin-bottom: 5px; }
.fld input, .fld textarea, .inv-form input, .inv-form textarea {
  width: 100%; background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.28);
  border-radius: 12px; padding: 12px 13px; outline: none;
}
.fld input:focus, .fld textarea:focus, .inv-form input:focus, .inv-form textarea:focus { border-color: var(--amber); }
.btn {
  display: inline-flex; align-items: center; gap: 7px; justify-content: center;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.3);
  border-radius: 13px; padding: 11px 18px; cursor: pointer; font-weight: 600;
}
.btn.primary { background: var(--amber); border-color: var(--amber); color: #161006; }
.btn.big { width: 100%; padding: 14px; font-size: 17.5px; }
.btn.danger { color: var(--err); margin: 4px 16px 0; }
.fineprint { font-size: 13.5px; color: var(--dim); margin-top: 14px; }

/* ---------- shell ---------- */
.topbar {
  position: sticky; top: 0; z-index: 20; display: flex; justify-content: space-between; align-items: center;
  padding: 12px 16px; background: rgba(0,0,0,.82); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,.14);
}
.top-left { display: flex; align-items: center; gap: 9px; }
.top-name { font-weight: 700; font-size: 19px; }
.icon-btn { background: none; border: 0; color: var(--ink); cursor: pointer; padding: 6px; }
main { max-width: 560px; margin: 0 auto; padding: 18px 0 96px; }
.page-head { padding: 0 16px 12px; }
.page-head h2 { font-size: 27px; }
.page-head p { color: var(--dim); margin-top: 4px; }
.tabbar {
  position: fixed; left: 0; right: 0; bottom: 0; z-index: 20;
  display: flex; background: rgba(10,10,10,.92); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-top: 1px solid rgba(255,255,255,.16); padding-bottom: env(safe-area-inset-bottom);
}
.tab-btn {
  flex: 1; background: none; border: 0; color: var(--dim); cursor: pointer;
  display: flex; flex-direction: column; align-items: center; gap: 3px; padding: 9px 2px 7px;
  font-size: 11.5px; font-weight: 600;
}
.tab-btn svg { width: 25px; height: 25px; }
.tab-btn.active { color: var(--amber); }

/* ---------- path ---------- */
.path { list-style: none; }
.path li { display: flex; gap: 12px; padding: 9px 0; border-bottom: 1px solid rgba(255,255,255,.09); }
.path li:last-child { border-bottom: 0; }
.path p { color: var(--dim); font-size: 15.5px; }
.rung {
  flex: 0 0 auto; width: 27px; height: 27px; border-radius: 50%; margin-top: 2px;
  border: 1.6px solid var(--amber); color: var(--amber);
  display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 14px;
}

/* ---------- inventions ---------- */
.inv-form { display: grid; gap: 9px; margin: 12px 0 6px; }
.inv-item {
  display: flex; justify-content: space-between; gap: 12px; padding: 11px 0;
  border-bottom: 1px solid rgba(255,255,255,.09);
}
.inv-item p { color: var(--dim); font-size: 15px; margin-top: 2px; }
.inv-date { color: var(--dim); font-size: 12.5px; }
.mini-btn {
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.25);
  border-radius: 9px; padding: 6px 11px; cursor: pointer; align-self: flex-start; white-space: nowrap; font-size: 14px;
}
.mini-btn.danger { color: var(--err); }

/* ---------- build card / duck ---------- */
.build-card {
  display: block; width: calc(100% - 32px); margin: 0 16px 14px; padding: 0; text-align: left;
  background: var(--glass); border: 1px solid var(--edge); border-radius: var(--radius); overflow: hidden; cursor: pointer; color: var(--ink);
}
.build-card img { width: 100%; height: 210px; object-fit: cover; display: block; }
.build-card-body { padding: 15px 17px 17px; }
.build-tag {
  display: inline-block; font-size: 12.5px; font-weight: 700; letter-spacing: .4px;
  color: var(--amber); background: var(--amber-soft); border-radius: 999px; padding: 3px 10px; margin-bottom: 8px;
}
.build-card h3 { font-size: 23px; }
.build-card p { color: var(--dim); margin: 5px 0 10px; }
.build-progress { display: inline-flex; align-items: center; gap: 6px; color: var(--amber); font-weight: 600; }
.back-btn { background: none; border: 0; color: var(--amber); font-weight: 600; cursor: pointer; padding: 2px 16px 12px; font-size: 16.5px; }
.duck-hero { margin: 0 16px 14px; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--edge); }
.duck-hero img { width: 100%; height: 240px; object-fit: cover; display: block; }
.duck-hero-cap { padding: 14px 17px 16px; background: var(--glass); }
.duck-hero-cap h2 { font-size: 26px; margin-top: 4px; }
.duck-hero-cap p { color: var(--dim); margin-top: 4px; }
.facts { display: grid; gap: 7px; }
.facts div { display: flex; gap: 10px; }
.facts dt { flex: 0 0 62px; color: var(--dim); font-size: 14.5px; padding-top: 1px; }
.facts dd { font-weight: 600; font-size: 15.5px; }
.sec-h { font-size: 21px; padding: 14px 16px 10px; }

/* videos */
.video-list { display: grid; gap: 0; }
.video-card { display: block; text-decoration: none; color: var(--ink); }
.video-card strong { font-size: 17.5px; }
.video-frame { position: relative; padding-top: 56.25%; margin-bottom: 10px; border-radius: 12px; overflow: hidden; }
.video-frame iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }
.video-badge {
  display: inline-flex; align-items: center; gap: 6px; color: var(--amber);
  background: var(--amber-soft); border-radius: 999px; padding: 4px 12px; font-weight: 700; font-size: 13.5px; margin-bottom: 8px;
}

/* model */
.model-card { padding-bottom: 14px; }
#model-wrap { height: 400px; display: flex; align-items: center; justify-content: center; }
#model-wrap canvas { border-radius: 14px; touch-action: none; }
.explode-row { display: flex; align-items: center; gap: 14px; margin: 10px 2px 4px; font-weight: 600; }
.explode-row input { flex: 1; accent-color: var(--amber); }
.part-card { border-top: 1px solid rgba(255,255,255,.12); padding: 12px 2px 4px; min-height: 60px; }
.part-card .btn { margin-top: 8px; }
.chip-row { display: flex; flex-wrap: wrap; gap: 7px; margin: 10px 0 4px; }
.chip {
  background: rgba(255,255,255,.09); border: 1px solid rgba(255,255,255,.25); color: var(--ink);
  border-radius: 999px; padding: 6px 12px; font-size: 14px; cursor: pointer;
}
.chip.on { background: var(--amber); border-color: var(--amber); color: #161006; font-weight: 700; }

/* BOM */
.bom-row { display: flex; gap: 14px; padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.09); }
.bom-row:last-of-type { border-bottom: 0; }
.bom-main { flex: 1; }
.bom-main p { color: var(--dim); font-size: 15px; margin-top: 2px; }
.bom-src { display: block; color: var(--dim); font-size: 12.5px; margin-top: 4px; }
.bom-price { text-align: right; font-weight: 700; white-space: nowrap; }
.buy { display: inline-flex; align-items: center; gap: 4px; font-size: 14px; font-weight: 600; margin-top: 5px; }
a.buy { display: inline-flex; }
.total-note { border-top: 1px solid rgba(255,255,255,.12); padding-top: 12px; margin-top: 6px; font-weight: 600; }

/* tools / safety / steps */
.tools { list-style: none; display: grid; gap: 11px; }
.tools p { color: var(--dim); font-size: 15.5px; }
.warn { border-color: rgba(255,122,107,.55); }
.step { scroll-margin-top: 76px; }
.step-head { display: flex; align-items: center; gap: 10px; cursor: pointer; }
.step-head h4 { font-size: 17.5px; }
.step-n { color: var(--amber); font-weight: 700; font-size: 14px; white-space: nowrap; }
.step-check {
  flex: 0 0 auto; width: 26px; height: 26px; border-radius: 8px;
  border: 1.8px solid rgba(255,255,255,.45); display: flex; align-items: center; justify-content: center; color: #161006;
}
.step-check.on { background: var(--amber); border-color: var(--amber); }
.step-body { margin-top: 10px; }
.step-img { width: 100%; border-radius: 12px; display: block; margin-bottom: 10px; }
.repo-name { font-size: 16.5px; margin-bottom: 4px; word-break: break-all; }

/* circuits */
.comp-grid { display: grid; gap: 0; }
.comp h4 { font-size: 17px; margin-bottom: 4px; }
.comp p { color: var(--dim); font-size: 15.5px; }

/* account / admin */
.adm-row { display: flex; justify-content: space-between; gap: 12px; padding: 11px 0; border-bottom: 1px solid rgba(255,255,255,.09); }
.adm-row:last-child { border-bottom: 0; }
.adm-badge { font-size: 11px; font-weight: 800; color: #161006; background: var(--amber); border-radius: 6px; padding: 2px 6px; vertical-align: 2px; }
.adm-actions { display: flex; gap: 7px; }

/* toast */
.toast {
  position: fixed; left: 50%; bottom: 92px; transform: translateX(-50%); z-index: 50;
  background: rgba(28,28,30,.96); border: 1px solid var(--edge); color: var(--ink);
  border-radius: 999px; padding: 10px 18px; font-size: 15px; max-width: 92vw; text-align: center;
}
@media (max-width: 380px) { .tab-btn span { font-size: 10.5px; } }

/* pass 2: price rows, time block, bought chips, instance line */
.bom-qty { color: var(--gold, #c8a24a); font-weight: 600; margin-left: 2px; }
.bom-avail { display: inline-block; margin-left: 8px; padding: 1px 8px; border-radius: 999px;
  border: 1px solid rgba(200,162,74,.45); color: #e8cf8f; font-size: 12px; vertical-align: 2px; }
.bom-price.time-val { font-size: 15px; }
.bom-row.time-row { display: block; }
.bom-row.time-row .bom-price { margin-top: 4px; }
.chip.bought { border-style: dashed; }
.part-inst { color: #e8cf8f; margin: 2px 0 0; }