/* ============================================================================
   photo2cad — "engineering workbench" design system
   Signature: drafting-paper blueprint grid (light) / instrument panel (dark),
   a constant dark CAD viewport, monospace for every technical readout.
   ========================================================================== */

/* ---------- tokens ---------- */
:root, :host {
  --bg: #eaeef4;
  --bg-grid: rgba(28, 62, 116, 0.055);
  --bg-grid-strong: rgba(28, 62, 116, 0.10);
  --panel: #ffffff;
  --panel-2: #f5f8fc;
  --panel-3: #eef3f9;
  --ink: #0e1a2b;
  --ink-2: #324256;
  --muted: #5f6f85;
  --line: #d6dee8;
  --line-2: #c0ccd9;
  --accent: #1357c4;
  --accent-2: #0b3f96;
  --accent-soft: #e6f0ff;
  --accent-ink: #0a346f;
  --ok: #12813f;
  --ok-soft: #d9f4e4;
  --ng: #c8341f;
  --ng-soft: #ffe0d9;
  --warn: #9a6407;
  --warn-soft: #fceec7;
  --na: #5d6e85;
  --na-soft: #eef2f7;
  --vp-bg: #0d1622;
  --vp-bg-2: #12202f;
  --vp-grid: #1e3346;
  --vp-ink: #c6d6e6;
  --radius: 14px;
  --radius-sm: 9px;
  --radius-xs: 6px;
  --shadow: 0 1px 2px rgba(14, 26, 43, 0.05), 0 8px 28px -14px rgba(14, 26, 43, 0.22);
  --shadow-lift: 0 2px 4px rgba(14, 26, 43, 0.06), 0 18px 40px -16px rgba(14, 26, 43, 0.28);
  --sans: "Segoe UI", system-ui, -apple-system, "Helvetica Neue", "Microsoft JhengHei", "Noto Sans TC", sans-serif;
  --mono: "Cascadia Code", "JetBrains Mono", "SFMono-Regular", "SF Mono", Consolas, "Liberation Mono", Menlo, monospace;
  color-scheme: light;
}

[data-theme="dark"], :host([data-theme="dark"]) {
  --bg: #090e16;
  --bg-grid: rgba(96, 170, 255, 0.05);
  --bg-grid-strong: rgba(96, 170, 255, 0.085);
  --panel: #101a27;
  --panel-2: #0d1521;
  --panel-3: #0b1320;
  --ink: #e7eef6;
  --ink-2: #b6c4d4;
  --muted: #8595aa;
  --line: #223145;
  --line-2: #31445d;
  --accent: #4d8dff;
  --accent-2: #6ea4ff;
  --accent-soft: #12233d;
  --accent-ink: #cfe0ff;
  --ok: #34c07a;
  --ok-soft: #0f2b1d;
  --ng: #ff6d55;
  --ng-soft: #341712;
  --warn: #e2a63a;
  --warn-soft: #2c2110;
  --na: #90a2b9;
  --na-soft: #16202e;
  --vp-bg: #0a121d;
  --vp-bg-2: #0f1b2a;
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.4), 0 10px 30px -14px rgba(0, 0, 0, 0.6);
  --shadow-lift: 0 2px 4px rgba(0, 0, 0, 0.5), 0 20px 44px -16px rgba(0, 0, 0, 0.7);
  color-scheme: dark;
}

/* ---------- reset / base ---------- */
* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--sans);
  font-size: 15px;
  line-height: 1.55;
  color: var(--ink);
  background-color: var(--bg);
  background-image:
    linear-gradient(var(--bg-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px),
    linear-gradient(var(--bg-grid-strong) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid-strong) 1px, transparent 1px);
  background-size: 26px 26px, 26px 26px, 130px 130px, 130px 130px;
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }
.dim { opacity: 0.62; }
.muted { color: var(--muted); }
.hidden { display: none !important; }
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}
.ic { width: 18px; height: 18px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round; }
a { color: var(--accent); }
::selection { background: var(--accent-soft); }

/* ---------- layout ---------- */
.masthead, .hero, .app, .foot { max-width: 1240px; margin: 0 auto; padding: 0 22px; }

/* ---------- masthead ---------- */
.masthead {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding-top: 18px; padding-bottom: 6px;
}
.brand { display: flex; align-items: center; gap: 12px; min-width: 0; }
.brand-mark { width: 40px; height: 40px; flex-shrink: 0; }
.bm-base { fill: var(--accent-soft); stroke: var(--accent); stroke-width: 1.4; }
[data-theme="dark"] .bm-base, :host([data-theme="dark"]) .bm-base { fill: #0d1c30; }
.bm-cube { fill: none; stroke: var(--accent); stroke-width: 1.8; stroke-linejoin: round; }
.brand-txt { display: flex; flex-direction: column; line-height: 1.15; min-width: 0; }
.brand-name { font-family: var(--mono); font-weight: 700; font-size: 19px; letter-spacing: -0.01em; color: var(--ink); }
.brand-tag { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.18em; color: var(--muted); }
.masthead-right { display: flex; align-items: center; gap: 10px; }
.masthead-link {
  font-family: var(--mono); font-size: 12.5px; font-weight: 700; letter-spacing: 0.02em;
  color: var(--accent); text-decoration: none; padding: 6px 11px;
  border: 1px solid var(--line); border-radius: 999px; background: var(--panel);
  transition: border-color .15s, color .15s;
}
.masthead-link:hover { border-color: var(--accent); color: var(--accent-2); }

/* status pill */
.pill { display: inline-flex; align-items: center; gap: 7px; padding: 5px 11px; border: 1px solid var(--line); border-radius: 999px; background: var(--panel); font-size: 12px; font-weight: 600; color: var(--muted); }
.pill .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--na); flex-shrink: 0; }
.status.online { color: var(--ok); border-color: color-mix(in srgb, var(--ok) 35%, var(--line)); background: color-mix(in srgb, var(--ok-soft) 60%, var(--panel)); }
.status.online .dot { background: var(--ok); box-shadow: 0 0 0 0 color-mix(in srgb, var(--ok) 60%, transparent); animation: pulse 2.4s infinite; }
.status.degraded { color: var(--warn); border-color: color-mix(in srgb, var(--warn) 35%, var(--line)); background: color-mix(in srgb, var(--warn-soft) 60%, var(--panel)); }
.status.degraded .dot { background: var(--warn); }
.status.offline { color: var(--ng); border-color: color-mix(in srgb, var(--ng) 32%, var(--line)); background: color-mix(in srgb, var(--ng-soft) 60%, var(--panel)); }
.status.offline .dot { background: var(--ng); }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--ok) 55%, transparent); } 70% { box-shadow: 0 0 0 6px transparent; } 100% { box-shadow: 0 0 0 0 transparent; } }

.icon-btn {
  width: 38px; height: 38px; display: inline-grid; place-items: center;
  border: 1px solid var(--line); border-radius: var(--radius-sm);
  background: var(--panel); color: var(--ink-2); cursor: pointer; transition: border-color .15s, color .15s, transform .15s;
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }
.icon-btn:active { transform: translateY(1px); }
.icon-btn .ic-moon { display: none; }
[data-theme="dark"] .icon-btn .ic-sun, :host([data-theme="dark"]) .icon-btn .ic-sun { display: none; }
[data-theme="dark"] .icon-btn .ic-moon, :host([data-theme="dark"]) .icon-btn .ic-moon { display: block; }

/* ---------- hero ---------- */
.hero { padding: 30px 22px 22px; }
.eyebrow { font-size: 11px; letter-spacing: 0.22em; color: var(--accent); font-weight: 700; margin: 0 0 12px; }
.hero h1 {
  margin: 0; font-size: clamp(30px, 5.2vw, 52px); line-height: 1.05;
  font-weight: 800; letter-spacing: -0.025em; color: var(--ink); max-width: 16ch;
}
.hero .hl { color: var(--accent); position: relative; white-space: nowrap; }
.hero .hl::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: 0.06em; height: 0.14em;
  background: var(--accent); opacity: 0.28; border-radius: 2px;
}
.lede { margin: 16px 0 0; max-width: 62ch; font-size: clamp(15px, 1.5vw, 17px); color: var(--ink-2); }
.lede b { color: var(--ink); font-weight: 700; }

.flow { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 20px; }
.flow-node {
  font-family: var(--mono); font-size: 12px; font-weight: 600; letter-spacing: 0.01em;
  padding: 6px 12px; border: 1px solid var(--line); border-radius: var(--radius-xs);
  background: var(--panel); color: var(--ink-2); box-shadow: var(--shadow);
}
.flow-node.out { background: var(--accent); border-color: var(--accent); color: #fff; }
.flow-arrow { color: var(--accent); font-size: 16px; font-weight: 700; }

/* ---------- app grid ---------- */
.app {
  display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 6fr); gap: 20px;
  padding-top: 10px; padding-bottom: 8px; align-items: start;
}
.panel {
  position: relative; background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px 22px;
  animation: rise .5s cubic-bezier(.22,.61,.36,1) both;
}
.input-panel { animation-delay: .05s; }
.results-panel { animation-delay: .12s; }
.results-panel::before {
  /* corner registration ticks, top-left */
  content: ""; position: absolute; top: -1px; left: -1px; width: 14px; height: 14px;
  border-top: 2px solid var(--accent); border-left: 2px solid var(--accent);
  border-top-left-radius: var(--radius); opacity: 0.55; pointer-events: none;
}
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

.input-panel.drag-any { outline: 2px dashed var(--accent); outline-offset: 3px; border-color: transparent; }

.panel-head { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.panel-head h2 { margin: 0; font-size: 15px; font-weight: 700; letter-spacing: 0.01em; color: var(--ink); }
.panel-no { font-size: 12px; font-weight: 700; color: var(--accent); background: var(--accent-soft); border-radius: var(--radius-xs); padding: 2px 7px; }
.panel-rule { flex: 1; height: 1px; background: var(--line); }
.panel-status { font-size: 12px; font-weight: 600; color: var(--muted); }
.panel-status.is-done { color: var(--ok); }
.panel-status.is-busy { color: var(--warn); }
.panel-status.is-err { color: var(--ng); }

/* ---------- fields ---------- */
.lbl { display: inline-flex; align-items: center; gap: 7px; font-size: 13px; font-weight: 700; color: var(--ink); margin-bottom: 6px; }
.lbl.sm { font-size: 12px; }
.req { font-size: 10px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--ng); }
.opt { font-size: 10px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--muted); }
.hint { margin: 0 0 10px; font-size: 12.5px; color: var(--muted); max-width: 60ch; }
.field { margin-bottom: 22px; }
.prd {
  width: 100%; font: inherit; font-size: 14px; line-height: 1.6; color: var(--ink);
  background: var(--panel-2); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 12px 14px; resize: vertical; min-height: 120px; transition: border-color .15s, box-shadow .15s;
}
.prd::placeholder { color: color-mix(in srgb, var(--muted) 80%, transparent); }
.prd:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); background: var(--panel); }
.prd.invalid { border-color: var(--ng); box-shadow: 0 0 0 3px var(--ng-soft); }
.field-err { display: block; margin-top: 8px; font-size: 12.5px; font-weight: 600; color: var(--ng); }

.text { width: 100%; font: inherit; font-size: 13px; color: var(--ink); background: var(--panel-2); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 9px 11px; min-height: 38px; }
.text:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

/* ---------- photos / slots ---------- */
.photos { margin-bottom: 22px; }
.photos-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-bottom: 4px; }
.photos-head .lbl { margin-bottom: 0; }
.photo-count { font-size: 12px; font-weight: 700; color: var(--accent); background: var(--accent-soft); padding: 3px 9px; border-radius: 999px; }

.slots { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 12px 0 16px; }
.slot {
  position: relative; margin: 0; display: flex; flex-direction: column;
  border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--panel-2);
  transition: border-color .15s, transform .15s, box-shadow .15s; overflow: visible;
}
.slot:hover { border-color: var(--line-2); }
.slot.filled { border-color: color-mix(in srgb, var(--ok) 45%, var(--line)); }
.slot.drag { border-color: var(--accent); border-style: dashed; box-shadow: 0 0 0 3px var(--accent-soft); transform: translateY(-1px); }
.slot.flash-err { border-color: var(--ng); box-shadow: 0 0 0 3px var(--ng-soft); }

.slot-drop { position: relative; display: block; cursor: pointer; aspect-ratio: 4 / 3; border-radius: calc(var(--radius-sm) - 1px); overflow: hidden; background: var(--panel-3); }
.slot-drop img.slot-thumb { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.slot-ph { position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; color: var(--muted); }
.slot-ph .ic { width: 24px; height: 24px; opacity: 0.7; }
.slot-ph-text { font-size: 11px; font-weight: 600; }
.slot-ph-text b { color: var(--accent); }
.slot .slot-busy { position: absolute; inset: 0; display: grid; place-items: center; background: color-mix(in srgb, var(--panel) 60%, transparent); }
.slot-cap { display: flex; align-items: center; justify-content: space-between; gap: 6px; padding: 7px 9px; border-top: 1px solid var(--line); background: var(--panel); border-radius: 0 0 var(--radius-sm) var(--radius-sm); }
.slot-key { font-family: var(--mono); font-size: 10.5px; font-weight: 700; letter-spacing: 0.12em; color: var(--ink-2); }
.slot-state { font-family: var(--mono); font-size: 10.5px; color: var(--muted); }
.slot.filled .slot-state { color: var(--ok); }
.slot-remove {
  position: absolute; top: 6px; right: 6px; z-index: 2; width: 24px; height: 24px;
  display: grid; place-items: center; border: none; border-radius: 50%;
  background: color-mix(in srgb, var(--ink) 82%, transparent); color: #fff; cursor: pointer;
  font-size: 15px; line-height: 1; box-shadow: 0 2px 6px rgba(0,0,0,.3); transition: transform .12s, background .12s;
}
.slot-remove:hover { transform: scale(1.08); background: var(--ng); }

/* switch */
.switch-row { display: flex; align-items: center; gap: 10px; margin-top: 4px; cursor: pointer; user-select: none; }
.switch { position: relative; display: inline-block; width: 40px; height: 23px; flex-shrink: 0; }
.switch .track { position: absolute; inset: 0; border-radius: 999px; background: var(--line-2); transition: background .18s; }
.switch .knob { position: absolute; top: 2.5px; left: 2.5px; width: 18px; height: 18px; border-radius: 50%; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.3); transition: transform .18s cubic-bezier(.22,.61,.36,1); }
.switch-row input:checked + .track { background: var(--accent); }
.switch-row input:checked + .track .knob { transform: translateX(17px); }
.switch-row input:focus-visible + .track { box-shadow: 0 0 0 3px var(--accent-soft); }
.switch-txt { font-size: 13px; color: var(--ink-2); }

/* advanced details */
.advanced { margin-top: 14px; border: 1px dashed var(--line); border-radius: var(--radius-sm); background: var(--panel-2); }
.advanced summary { cursor: pointer; list-style: none; padding: 10px 13px; font-size: 12.5px; font-weight: 700; color: var(--ink-2); display: flex; align-items: center; gap: 8px; }
.advanced summary::-webkit-details-marker { display: none; }
.advanced summary::before { content: "+"; font-family: var(--mono); color: var(--accent); font-size: 15px; width: 14px; }
.advanced[open] summary::before { content: "–"; }
.adv-body { padding: 4px 13px 14px; }

/* ---------- actions ---------- */
.actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 4px; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer; font: inherit; font-weight: 700;
  border: 1px solid var(--line); background: var(--panel); color: var(--ink);
  border-radius: var(--radius-sm); padding: 10px 16px; min-height: 44px; white-space: nowrap;
  transition: transform .13s, box-shadow .15s, background .15s, border-color .15s, color .15s;
}
.btn:active { transform: translateY(1px); }
.btn .ic { width: 17px; height: 17px; }
.btn.primary {
  background: linear-gradient(180deg, var(--accent), var(--accent-2)); border-color: var(--accent-2); color: #fff;
  box-shadow: 0 1px 0 rgba(255,255,255,.18) inset, 0 8px 20px -10px color-mix(in srgb, var(--accent) 70%, transparent);
}
.btn.primary:hover { box-shadow: 0 1px 0 rgba(255,255,255,.22) inset, 0 12px 26px -10px color-mix(in srgb, var(--accent) 80%, transparent); transform: translateY(-1px); }
.btn.primary:disabled { cursor: not-allowed; opacity: .72; transform: none; box-shadow: none; }
.btn.ghost { background: transparent; border-color: transparent; color: var(--muted); }
.btn.ghost:hover { border-color: var(--line); color: var(--ink); background: var(--panel-2); }
.btn-spin { display: inline-grid; place-items: center; }
.actions-hint { font-size: 12px; color: var(--muted); margin-left: 2px; }

/* spinner */
.spin { width: 16px; height: 16px; border: 2px solid color-mix(in srgb, currentColor 30%, transparent); border-top-color: currentColor; border-radius: 50%; animation: spin .7s linear infinite; }
.slot .spin { border-color: color-mix(in srgb, var(--accent) 30%, transparent); border-top-color: var(--accent); }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- results panel ---------- */
.results { min-height: 320px; }
.result { animation: rise .4s cubic-bezier(.22,.61,.36,1) both; }
.result-head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.result-head h3 { margin: 0; font-size: 16px; font-weight: 700; }
.badge { font-family: var(--mono); font-size: 11px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; padding: 4px 10px; border-radius: 999px; }
.badge.ok { color: var(--ok); background: var(--ok-soft); }
.badge.warn { color: var(--warn); background: var(--warn-soft); }
.badge.ng { color: var(--ng); background: var(--ng-soft); }
.job { font-size: 11.5px; color: var(--muted); margin-left: auto; }

/* idle */
.idle { display: flex; flex-direction: column; align-items: center; text-align: center; justify-content: center; min-height: 320px; padding: 24px; color: var(--muted); }
.idle .idle-icon { width: 76px; height: 76px; margin-bottom: 16px; opacity: .85; }
.idle h3 { margin: 0 0 8px; font-size: 18px; color: var(--ink); }
.idle p { margin: 0 0 18px; max-width: 38ch; font-size: 13.5px; }
.howto { margin: 0; padding-left: 18px; text-align: left; font-size: 13px; color: var(--ink-2); display: flex; flex-direction: column; gap: 8px; }
.howto li { display: flex; gap: 8px; }
.howto li::marker { font-family: var(--mono); color: var(--accent); font-weight: 700; }

/* loading */
.loading { display: flex; flex-direction: column; gap: 20px; padding: 10px 4px; }
.load-top { display: flex; align-items: center; gap: 14px; }
.load-top .spin { width: 26px; height: 26px; border-width: 3px; color: var(--accent); border-color: color-mix(in srgb, var(--accent) 25%, transparent); border-top-color: var(--accent); }
.load-title { font-size: 15px; font-weight: 700; color: var(--ink); }
.load-sub { font-size: 12.5px; color: var(--muted); }
.elapsed { margin-left: auto; font-size: 13px; font-weight: 700; color: var(--accent); background: var(--accent-soft); padding: 4px 10px; border-radius: var(--radius-xs); }
.elapsed.is-done { color: var(--ok); background: var(--ok-soft); }

.stepper { display: flex; align-items: flex-start; gap: 0; margin: 4px 0 0; padding: 0; list-style: none; }
.step { flex: 1; display: flex; flex-direction: column; align-items: center; gap: 8px; text-align: center; position: relative; }
.step:not(:last-child)::after { content: ""; position: absolute; top: 13px; left: 50%; width: 100%; height: 2px; background: var(--line); z-index: 0; }
.step .node { width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; background: var(--panel); border: 2px solid var(--line); color: var(--muted); font-family: var(--mono); font-size: 12px; font-weight: 700; z-index: 1; transition: all .25s; }
.step .node .ic { width: 15px; height: 15px; }
.step .step-lbl { font-size: 11.5px; font-weight: 600; color: var(--muted); max-width: 12ch; }
.step .step-key { font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.08em; text-transform: uppercase; color: color-mix(in srgb, var(--muted) 80%, transparent); }
.step.active .node { border-color: var(--accent); color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); animation: nodePulse 1.4s infinite; }
.step.active .step-lbl { color: var(--ink); }
.step.done .node { border-color: var(--ok); background: var(--ok); color: #fff; }
.step.done .step-lbl { color: var(--ok); }
.step.done:not(:last-child)::after { background: var(--ok); }
.step.failed .node { border-color: var(--ng); background: var(--ng); color: #fff; }
.step.failed .step-lbl { color: var(--ng); }
.step.failed:not(:last-child)::after { background: color-mix(in srgb, var(--ng) 40%, var(--line)); }
@keyframes nodePulse { 0%,100% { box-shadow: 0 0 0 4px var(--accent-soft); } 50% { box-shadow: 0 0 0 7px var(--accent-soft); } }

/* success */
.vp-wrap { margin-bottom: 16px; }
.vp-frame {
  position: relative; border-radius: var(--radius-sm); overflow: hidden;
  border: 1px solid var(--line-2); background: var(--vp-bg);
  aspect-ratio: 16 / 10; min-height: 260px;
}
.viewport { position: absolute; inset: 0; }
.viewport canvas { display: block; width: 100% !important; height: 100% !important; }
.vp-frame::after {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  border: 1px solid color-mix(in srgb, var(--vp-grid) 90%, transparent); border-radius: var(--radius-sm);
}
.vp-corner { position: absolute; width: 12px; height: 12px; border: 2px solid color-mix(in srgb, var(--accent) 70%, transparent); pointer-events: none; z-index: 2; }
.vp-corner.tl { top: 8px; left: 8px; border-right: 0; border-bottom: 0; }
.vp-corner.tr { top: 8px; right: 8px; border-left: 0; border-bottom: 0; }
.vp-corner.bl { bottom: 8px; left: 8px; border-right: 0; border-top: 0; }
.vp-corner.br { bottom: 8px; right: 8px; border-left: 0; border-top: 0; }
.vp-hint { position: absolute; bottom: 10px; left: 50%; transform: translateX(-50%); z-index: 2; font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.04em; color: var(--vp-ink); background: color-mix(in srgb, var(--vp-bg) 70%, transparent); padding: 3px 9px; border-radius: 999px; pointer-events: none; opacity: 0; transition: opacity .4s; }
.vp-frame.has-model .vp-hint { opacity: 0.9; }
.vp-loading { position: absolute; inset: 0; z-index: 1; display: grid; place-items: center; color: var(--vp-ink); font-family: var(--mono); font-size: 12px; }
.vp-loading .spin { width: 22px; height: 22px; margin-bottom: 8px; border-color: color-mix(in srgb, var(--vp-ink) 30%, transparent); border-top-color: var(--vp-ink); }
.vp-fallback { position: absolute; inset: 0; z-index: 3; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; text-align: center; padding: 20px; background: color-mix(in srgb, var(--vp-bg) 92%, transparent); color: var(--vp-ink); }
.vp-fallback p { margin: 0; font-weight: 700; font-size: 15px; color: #fff; }
.vp-fallback small { margin: 0; font-size: 12px; color: color-mix(in srgb, var(--vp-ink) 85%, transparent); max-width: 34ch; }
.vp-fb-icon { width: 40px; height: 40px; opacity: 0.7; }

.vp-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 12px; }
.btn.download { min-height: 42px; }
.btn.download b { font-family: var(--mono); }
.link { font-size: 12.5px; font-weight: 600; color: var(--muted); text-decoration: none; border-bottom: 1px dashed var(--line-2); padding-bottom: 1px; margin-left: auto; }
.link:hover { color: var(--accent); border-color: var(--accent); }

/* report */
.report { border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--panel-2); padding: 14px 16px; margin-bottom: 14px; }
.report h3 { margin: 0 0 12px; font-size: 13px; font-weight: 700; letter-spacing: 0.02em; display: flex; align-items: center; gap: 8px; }
.report h3 .ic { color: var(--accent); }
.kpis { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.kpi { display: flex; flex-direction: column; gap: 3px; padding: 10px 12px; border: 1px solid var(--line); border-radius: var(--radius-xs); background: var(--panel); }
.kpi-v { font-family: var(--mono); font-size: 17px; font-weight: 700; color: var(--ink); letter-spacing: -0.01em; }
.kpi-v.ok { color: var(--ok); }
.kpi-v.ng { color: var(--ng); }
.kpi-l { font-size: 11px; color: var(--muted); letter-spacing: 0.02em; }
.warns { margin: 12px 0 0; padding-left: 18px; }
.warns li { font-size: 12.5px; color: var(--warn); margin-bottom: 4px; }

/* code / details blocks */
.code-block-wrap { border: 1px solid var(--line); border-radius: var(--radius-sm); margin-bottom: 10px; background: var(--panel-2); overflow: hidden; }
.code-block-wrap summary { cursor: pointer; list-style: none; display: flex; align-items: center; gap: 9px; padding: 11px 14px; font-size: 13px; font-weight: 700; color: var(--ink-2); }
.code-block-wrap summary::-webkit-details-marker { display: none; }
.code-block-wrap summary .ic { color: var(--accent); }
.code-block-wrap summary .chev { margin-left: auto; transition: transform .2s; color: var(--muted); }
.code-block-wrap[open] summary .chev { transform: rotate(90deg); }
.code-block-wrap pre { margin: 0; padding: 14px; border-top: 1px solid var(--line); background: var(--panel-3); overflow-x: auto; max-height: 320px; }
.code-block-wrap code { font-family: var(--mono); font-size: 12px; line-height: 1.6; color: var(--ink); white-space: pre; }

/* error */
.err-stage { display: inline-flex; align-items: center; gap: 7px; font-size: 12.5px; color: var(--muted); margin-bottom: 10px; }
.err-stage b { color: var(--ng); }
.err-msg { margin: 0 0 10px; font-size: 14px; color: var(--ink); line-height: 1.55; padding: 12px 14px; background: var(--ng-soft); border: 1px solid color-mix(in srgb, var(--ng) 30%, var(--line)); border-radius: var(--radius-sm); }
.err-hint { margin: 0 0 14px; font-size: 12.5px; color: var(--muted); }
.err-result { padding-top: 4px; }

/* ---------- footer ---------- */
.foot { display: flex; flex-wrap: wrap; align-items: center; gap: 9px; padding-top: 24px; padding-bottom: 34px; font-size: 12.5px; color: var(--ink-2); }
.foot .mono { font-weight: 700; color: var(--ink); }
.foot-sep { color: var(--line-2); }

/* ---------- focus visibility ---------- */
a:focus-visible, button:focus-visible, .slot-drop:focus-within, .switch-row input:focus-visible + .track, .prd:focus-visible, .text:focus-visible, .advanced summary:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px;
}
.slot-drop:focus-within { outline: 2px solid var(--accent); outline-offset: 1px; }

/* ---------- responsive ---------- */
@media (max-width: 940px) {
  .app { grid-template-columns: 1fr; }
  .hero h1 { max-width: none; }
}
@media (max-width: 560px) {
  .masthead, .hero, .app, .foot { padding-left: 15px; padding-right: 15px; }
  .brand-name { font-size: 17px; }
  .status-txt { display: none; }
  .pill { padding: 6px; }
  .slots { grid-template-columns: repeat(2, 1fr); }
  .kpis { grid-template-columns: 1fr 1fr; }
  .kpi.bbox { grid-column: 1 / -1; }
  .actions .btn { flex: 1; justify-content: center; }
  .hero .hl { white-space: normal; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
  html { scroll-behavior: auto; }
  .status.online .dot { animation: none; }
}

/* ============================================================================
   photo2cad — GALLERY (added section)
   Reuses the workbench tokens and components above. Only the gallery grid and
   card primitives below are new; no existing selector is restyled.
   ========================================================================== */

/* masthead brand acts as the back-to-app link */
a.brand { text-decoration: none; }
a.brand:hover .brand-name { color: var(--accent); }

/* page container (same metrics as .app) */
.g-main { max-width: 1240px; margin: 0 auto; padding: 0 22px; }

/* shorter hero for the gallery */
.g-hero h1 { font-size: clamp(26px, 4vw, 40px); }

/* honest "how to add a real part" note */
.g-note { margin: 8px 0 20px; border-left: 3px solid var(--accent); }
.g-note .panel-head { margin-bottom: 8px; }
.g-note code { font-family: var(--mono); font-size: 11.5px; color: var(--accent-ink); background: var(--panel-3); border: 1px solid var(--line); border-radius: 4px; padding: 1px 5px; }

/* responsive grid: 1 -> 2 -> 3 columns */
.g-grid { display: grid; grid-template-columns: 1fr; gap: 18px; padding-bottom: 4px; }
@media (min-width: 720px)  { .g-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1080px) { .g-grid { grid-template-columns: repeat(3, 1fr); } }

/* card (built on .panel) */
.g-card { display: flex; flex-direction: column; transition: box-shadow .16s, border-color .16s; }
.g-card:hover { border-color: var(--line-2); box-shadow: var(--shadow-lift); }
.g-grid .g-card:nth-child(1) { animation-delay: .04s; }
.g-grid .g-card:nth-child(2) { animation-delay: .09s; }
.g-grid .g-card:nth-child(3) { animation-delay: .14s; }
.g-grid .g-card:nth-child(4) { animation-delay: .19s; }
.g-grid .g-card:nth-child(5) { animation-delay: .24s; }
.g-grid .g-card:nth-child(6) { animation-delay: .29s; }

/* head: category chip + name + sample tag */
.g-head { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 10px; }
.g-head-main { min-width: 0; display: flex; flex-direction: column; gap: 6px; }
.g-cat { align-self: flex-start; font-family: var(--mono); font-size: 10.5px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--accent); background: var(--accent-soft); padding: 3px 8px; border-radius: 999px; }
.g-name { margin: 0; font-size: 16px; font-weight: 700; line-height: 1.2; color: var(--ink); overflow-wrap: anywhere; }
.g-samp { margin-left: auto; align-self: flex-start; font-family: var(--mono); font-size: 9.5px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; color: var(--warn); background: var(--warn-soft); padding: 2px 7px; border-radius: 999px; white-space: nowrap; }

/* PRD snippet (clamped so cards stay even) */
.g-prd { display: -webkit-box; -webkit-line-clamp: 4; -webkit-box-orient: vertical; overflow: hidden; }

/* reference-face thumbnails (the six photo slots; empty for samples) */
.g-faces { display: grid; grid-template-columns: repeat(6, 1fr); gap: 6px; margin: 2px 0 14px; }
.g-face { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 3px; aspect-ratio: 1 / 1; border: 1px dashed var(--line); border-radius: var(--radius-xs); background: var(--panel-2); color: var(--muted); }
.g-face .ic { width: 14px; height: 14px; opacity: .8; }
.g-face-lbl { font-family: var(--mono); font-size: 8.5px; letter-spacing: 0.04em; text-transform: uppercase; }

/* blueprint / render preview */
.g-preview {
  position: relative; margin: 0 0 14px; border: 1px solid var(--line);
  border-radius: var(--radius-sm); background-color: var(--panel-2);
  background-image:
    linear-gradient(var(--bg-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--bg-grid) 1px, transparent 1px);
  background-size: 14px 14px;
  aspect-ratio: 16 / 10; display: grid; place-items: center;
  overflow: hidden; color: var(--accent);
}
.g-preview::before {
  content: ""; position: absolute; top: 6px; left: 6px; width: 11px; height: 11px; z-index: 1;
  border-top: 2px solid color-mix(in srgb, var(--accent) 70%, transparent);
  border-left: 2px solid color-mix(in srgb, var(--accent) 70%, transparent);
  border-top-left-radius: var(--radius-sm); pointer-events: none;
}
.g-preview svg { width: 74%; height: auto; max-height: 82%; display: block; }
.g-preview img { width: 100%; height: 100%; object-fit: cover; display: block; }
.g-preview .gt { fill: color-mix(in srgb, currentColor 10%, transparent); }
.g-preview .gf { fill: color-mix(in srgb, currentColor 4%, transparent); }
.g-preview .gh { stroke-dasharray: 3 3; opacity: .5; }
.g-preview .gc { opacity: .55; stroke-width: 1.2; }
.g-preview-cap {
  position: absolute; top: 8px; left: 8px; z-index: 1;
  font-family: var(--mono); font-size: 9.5px; font-weight: 600; letter-spacing: 0.08em; text-transform: uppercase;
  color: var(--muted); background: color-mix(in srgb, var(--panel) 74%, transparent);
  padding: 2px 7px; border-radius: 999px;
}

/* meta row: badges + units/date */
.g-meta { margin-top: auto; display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.g-badges { display: flex; align-items: center; gap: 6px; }
.g-badges a.badge { display: inline-flex; align-items: center; gap: 5px; text-decoration: none; cursor: pointer; transition: box-shadow .15s; }
.g-badges a.badge:hover { box-shadow: var(--shadow); }
.badge.samp { color: var(--muted); background: var(--na-soft); border: 1px dashed var(--line-2); }
.g-units { font-family: var(--mono); font-size: 11px; color: var(--muted); margin-left: auto; white-space: nowrap; }

/* graceful fetch-failure / empty notice */
.g-empty { margin: 8px 0 20px; }

/* small screens */
@media (max-width: 560px) {
  .g-main { padding-left: 15px; padding-right: 15px; }
}
@media (max-width: 480px) {
  .g-faces { grid-template-columns: repeat(3, 1fr); }
}

/* ============================================================================
   photo2cad — DEMO (added section): one-click example chips + demo notice
   ========================================================================== */
.examples { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 0 0 12px; }
.examples-lbl { font-size: 10.5px; font-weight: 700; letter-spacing: 0.18em; color: var(--muted); }
.example-chip {
  font: inherit; font-size: 12.5px; font-weight: 600; cursor: pointer;
  color: var(--accent-ink); background: var(--accent-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--line));
  border-radius: 999px; padding: 5px 11px; transition: border-color .15s, transform .15s;
}
.example-chip:hover { border-color: var(--accent); transform: translateY(-1px); }
.example-chip:active { transform: translateY(0); }
.example-chip:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.demo-note {
  max-width: 1240px; margin: 0 auto; padding: 10px 22px 0;
  font-size: 12.5px; font-weight: 600; color: var(--warn);
}
@media (max-width: 560px) { .demo-note { padding-left: 15px; padding-right: 15px; } }