:root {
  --bg: #f6f5f2;
  --card: #ffffff;
  --text: #1d1d1b;
  --muted: #6b6a66;
  --line: #dddbd5;
  --accent: #c2410c;
  --accent-text: #ffffff;
  --part: #e8e4da;
  --part-line: #57534e;
  --zone: rgba(37, 99, 235, 0.18);
  --zone-line: #2563eb;
  --finger: rgba(217, 119, 6, 0.25);
  --finger-line: #b45309;
  --good: #15803d;
  --warn: #b45309;
  --bad: #b91c1c;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #161615;
    --card: #21211f;
    --text: #ecebe7;
    --muted: #a19f99;
    --line: #3a3936;
    --accent: #fb923c;
    --accent-text: #1d1d1b;
    --part: #4d4940;
    --part-line: #d6d3cb;
    --zone: rgba(96, 165, 250, 0.2);
    --zone-line: #60a5fa;
    --finger: rgba(251, 191, 36, 0.2);
    --finger-line: #fbbf24;
    --good: #4ade80;
    --warn: #fbbf24;
    --bad: #f87171;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", sans-serif;
}
header { padding: 18px 16px 4px; max-width: 1400px; margin: 0 auto; }
h1 { font-size: 1.5rem; margin: 0; }
h2 { font-size: 1.05rem; margin: 0 0 8px; }
.sub, .hint, .note { color: var(--muted); }
.sub { margin: 4px 0 0; }
.hint { font-size: 0.85rem; }
.note { font-size: 0.88rem; margin: 8px 0 0; }

main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 12px 16px 40px;
  display: grid;
  grid-template-columns: minmax(300px, 380px) 1fr;
  gap: 16px;
  align-items: start;
}


.card, fieldset {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 14px;
}
#views { display: grid; gap: 16px; min-width: 0; }
.card-head { display: flex; flex-wrap: wrap; gap: 4px 12px; align-items: baseline; margin-bottom: 6px; }
.card-head h2 { margin: 0; }

#controls { display: grid; gap: 12px; }
fieldset { margin: 0; min-width: 0; }
fieldset > summary, legend { font-weight: 600; }
details > summary { cursor: pointer; font-weight: 600; padding: 2px 0; }
details[open] > summary { margin-bottom: 8px; }

.field { display: grid; grid-template-columns: 1fr 76px; gap: 2px 8px; align-items: center; margin: 6px 0; }
.field label { font-size: 0.92rem; }
.field input[type="range"] { grid-column: 1 / -1; width: 100%; accent-color: var(--accent); }
.field input[type="number"], .field input[type="text"], .field select {
  width: 100%;
  padding: 4px 6px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--bg);
  color: var(--text);
  font: inherit;
}
.field select { grid-column: 2; }
.field input[type="text"] { grid-column: 1 / -1; }
.field .help { grid-column: 1 / -1; font-size: 0.8rem; color: var(--muted); }
.field.check { grid-template-columns: auto 1fr; }

button {
  font: inherit;
  padding: 8px 14px;
  min-height: 40px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-text);
  cursor: pointer;
}
button.secondary { background: transparent; color: var(--accent); }
button:disabled { opacity: 0.5; cursor: default; }
.buttons { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
label.inline { display: inline-flex; gap: 6px; align-items: center; font-size: 0.9rem; margin-top: 6px; }

#profile { width: 100%; height: auto; max-height: 520px; display: block; }
#profile .part { fill: var(--part); stroke: var(--part-line); stroke-width: 0.35; }
#profile .step { fill: none; stroke: var(--part-line); stroke-width: 0.25; stroke-dasharray: 1 0.8; }
#front { width: 100%; height: auto; max-height: 260px; display: block; }
#front .part { fill: var(--part); stroke: var(--part-line); stroke-width: 0.35; }
#front .dim { stroke: var(--muted); stroke-width: 0.25; stroke-dasharray: 1.5 1; }
#front .dim-text { fill: var(--muted); font-size: 3px; }
.finger-table { width: 100%; grid-column: 1 / -1; border-collapse: collapse; }
.finger-table th { font-weight: 500; font-size: 0.82rem; text-align: left; padding: 2px 4px; border: 0; }
.finger-table td { padding: 2px 3px; border: 0; }
.finger-table input { width: 100%; padding: 4px 5px; border: 1px solid var(--line); border-radius: 6px; background: var(--bg); color: var(--text); font: inherit; }
#profile .finger { fill: var(--finger); stroke: var(--finger-line); stroke-width: 0.3; }
#profile .dim { stroke: var(--muted); stroke-width: 0.25; fill: none; }
#profile .dim-text { fill: var(--muted); font-size: 3.2px; }
#profile .force { stroke: var(--accent); stroke-width: 0.6; fill: none; }
#profile .force-head { fill: var(--accent); }
#profile .force-text { fill: var(--accent); font-size: 3.2px; }

#view3d { width: 100%; height: 380px; display: block; border-radius: 8px; background: var(--bg); touch-action: none; cursor: grab; }

table { border-collapse: collapse; width: 100%; font-size: 0.92rem; }
td, th { text-align: left; padding: 4px 6px; border-bottom: 1px solid var(--line); }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
.good { color: var(--good); }
.warnc { color: var(--warn); }
.bad { color: var(--bad); }
ul.warnings { margin: 8px 0 0; padding-left: 18px; color: var(--warn); }
.results-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 12px 20px; }

dialog {
  width: min(960px, calc(100vw - 16px));
  max-height: calc(100vh - 16px);
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--card);
  color: var(--text);
  padding: 12px 16px;
}
dialog::backdrop { background: rgba(0, 0, 0, 0.5); }
.photo-head { display: flex; justify-content: space-between; align-items: center; }
.photo-head button { background: transparent; color: var(--text); border-color: var(--line); min-height: 36px; padding: 4px 10px; }
.steps { margin: 4px 0 8px; padding-left: 20px; font-size: 0.9rem; }
.photo-tools { display: flex; flex-wrap: wrap; gap: 8px 16px; align-items: center; font-size: 0.9rem; }
.photo-tools input[type="number"] { width: 70px; }
.photo-wrap { overflow: auto; max-height: 55vh; margin-top: 8px; border: 1px solid var(--line); border-radius: 8px; background: var(--bg); }
#photoCanvas { display: block; cursor: crosshair; touch-action: none; }

[hidden] { display: none !important; }

#plate, #section { width: 100%; height: auto; display: block; }
#plate { max-height: 460px; }
#section { max-height: 220px; }
#plate .part, #section .part { fill: var(--part); stroke: var(--part-line); stroke-width: 0.35; }
#plate .dim-text, #section .dim-text { fill: var(--muted); font-size: 3px; }
#plate .force-text { fill: var(--accent); font-size: 3.4px; }
#plate .cut { fill: none; stroke: var(--part-line); stroke-width: 0.3; stroke-dasharray: 1.2 0.9; }

/* Layout: columns (controls left, views right and fixed while the controls scroll) or rows (plate
   and 3D pinned on top, controls below). "auto" picks columns on wide screens. */
header { display: flex; flex-wrap: wrap; align-items: baseline; gap: 4px 16px; }
header .sub { flex: 1 1 320px; }
.layout-pick { font-size: 0.85rem; color: var(--muted); }
.layout-pick select { font: inherit; padding: 2px 4px; border-radius: 6px; border: 1px solid var(--line); background: var(--card); color: var(--text); }
#stage, #details { display: grid; gap: 12px; min-width: 0; }
#stage .card { min-width: 0; }
#stage #plate { max-height: var(--stage-h, 40vh); }
#stage #view3d { height: var(--stage-h, 40vh); }

main.cols { grid-template-columns: minmax(300px, 380px) 1fr; }
main.cols #views { position: sticky; top: 8px; max-height: calc(100vh - 16px); overflow-y: auto; align-self: start; }
main.cols #stage { --stage-h: 34vh; }
@media (min-width: 1250px) { main.cols #stage { grid-template-columns: 1fr 1fr; --stage-h: 42vh; } }

main.rows { grid-template-columns: 1fr; }
main.rows #views { display: contents; }
main.rows #stage { order: -1; position: sticky; top: 0; z-index: 5; background: var(--bg); padding: 6px 0;
  grid-template-columns: 1fr 1fr; --stage-h: 30vh; }
main.rows #stage .hint, main.rows #stage .inline { display: none; }
main.rows #controls { grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); align-items: start;
  grid-auto-rows: 4px; row-gap: 0; } /* masonry: app.js sets each card's row span from its height */
main.rows #controls > * { margin-bottom: 12px; }
@media (max-width: 600px) { main.rows #stage { --stage-h: 24vh; gap: 6px; } main.rows #stage .card { padding: 6px; } }

/* icons next to the controls */
.ico { display: inline-flex; vertical-align: middle; margin-right: 6px; }
.ico svg { width: 42px; height: 28px; }
.ico .p { fill: var(--part); fill-opacity: 0.6; stroke: var(--part-line); stroke-width: 1.2; stroke-linejoin: round; }
.ico path.p:not([d$="Z"]), .ico path.p.dash { fill: none; }
.ico .h { fill: var(--bg); stroke: var(--part-line); stroke-width: 1.2; }
.ico .a { fill: none; stroke: var(--accent); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.ico .dash { stroke-dasharray: 2 2; fill: none; }
.ico .t { font: 7px system-ui, sans-serif; fill: var(--accent); }
.field.fingers .ico svg { width: 54px; height: 36px; }
.finger-table caption { text-align: left; font-weight: 600; font-size: 0.9rem; padding: 2px 4px 4px; }
#plate .hl { fill: var(--accent); fill-opacity: 0.35; stroke: var(--accent); stroke-width: 1.2; stroke-linejoin: round; stroke-linecap: round; pointer-events: none; }

.plate-status ul.warnings { margin: 6px 0 0; font-size: 0.85rem; }
.plate-status p.bad { margin: 6px 0 0; font-size: 0.88rem; }
#stage.stale #plate, #stage.stale #view3d { opacity: 0.35; filter: grayscale(1); }
.start summary { cursor: pointer; font-weight: 600; }
.start ol { margin: 8px 0 0; padding-left: 20px; font-size: 0.9rem; }
.start li { margin: 4px 0; }
#plate .dim-text { font-size: 3.6px; }
.group-note { margin: 0 0 8px; }

/* measurement guide: (i) buttons in the hand table and their floating card */
button.info {
  /* overrides the general button size (min-height 40px stretched it into an oval) */
  display: inline-grid; place-items: center; box-sizing: border-box; flex: none;
  width: 18px; height: 18px; min-width: 18px; min-height: 0; padding: 0; margin-left: 2px; position: relative;
  border-radius: 50%; border: 1px solid var(--accent); background: transparent; color: var(--accent);
  font: italic 600 11px/1 Georgia, serif; vertical-align: middle; cursor: help;
}
button.info::before { content: ""; position: absolute; inset: -8px; border-radius: 50%; } /* larger tap area */
.info:hover, .info:focus-visible, .info.pinned { background: var(--accent); color: var(--accent-text); }
.guide-tip {
  position: fixed; z-index: 50; overflow-y: auto; overscroll-behavior: contain; padding: 10px 12px; border-radius: 10px; font-size: 0.85rem; line-height: 1.4;
  background: var(--card); color: var(--text); border: 1px solid var(--line); box-shadow: 0 8px 28px rgb(0 0 0 / 0.25);
}
.guide-tip b { display: block; margin-bottom: 4px; }
.guide-tip p { margin: 6px 0; }
.guide-tip ol { margin: 4px 0 0; padding-left: 18px; }
.guide-tip li { margin: 2px 0; }
.guide-tip svg { display: block; width: 100%; height: auto; max-height: 150px; margin: 4px 0; }
.guide-tip .f { fill: none; stroke: var(--part-line); stroke-width: 14; stroke-linecap: round; stroke-linejoin: round; opacity: 0.55; }
.guide-tip .f.thin { stroke-width: 12; }
.guide-tip .f-body { fill: var(--part); fill-opacity: 0.6; stroke: var(--part-line); stroke-width: 1.2; }
.guide-tip .j { fill: var(--card); stroke: var(--part-line); stroke-width: 1.5; }
.guide-tip .a { fill: none; stroke: var(--accent); stroke-width: 2.2; stroke-linecap: round; }
.guide-tip .m-line { fill: none; stroke: var(--muted); stroke-width: 1; }
.guide-tip .dash { stroke-dasharray: 3 3; }
.guide-tip .t { font: 600 11px system-ui, sans-serif; fill: var(--accent); }
.guide-tip .m { font: 10px system-ui, sans-serif; fill: var(--muted); }
.finger-table th { white-space: nowrap; }
.info-ref { display: inline-grid; place-items: center; width: 15px; height: 15px; border-radius: 50%; border: 1px solid var(--accent); color: var(--accent); font: italic 600 10px/1 Georgia, serif; }
.ico .t.lbl { font: 700 9px system-ui, sans-serif; letter-spacing: 0.5px; }