/* Brushograph WebUI */
:root {
  --bg: #f6f7f9;
  --card: #ffffff;
  --line: #dfe3e9;
  --line-soft: #eceff3;
  --ink: #1c2027;
  --ink-dim: #5b6474;
  --ink-faint: #8a94a4;
  --accent: #1f7ab0;
  --accent-dk: #17587f;
  --bad: #c0392b;
  --good: #1e8e5a;
  --warn: #b9761f;
  --c: #00aeef; --m: #ec008c; --y: #ffd400; --k: #23282f; --water: #96c8eb;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #14161a; --card: #1b1e24; --line: #2b303a; --line-soft: #23272f;
    --ink: #e8eaee; --ink-dim: #a3abb8; --ink-faint: #737d8c;
    --accent: #4bb3e8; --accent-dk: #2a7fae; --bad: #e07070; --good: #62c08b; --warn: #d9a252;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg); color: var(--ink);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  display: flex; flex-direction: column; min-height: 100vh;
}

.topbar {
  padding: 16px 26px; border-bottom: 1px solid var(--line);
  background: var(--card);
}
.brand { display: flex; align-items: center; gap: 14px; max-width: 1080px; margin: 0 auto; }
.brand h1 { margin: 0; font-size: 19px; letter-spacing: -.01em; }
.brand p { margin: 1px 0 0; font-size: 13px; color: var(--ink-dim); }
.mark {
  width: 32px; height: 32px; border-radius: 9px; flex: none;
  background: conic-gradient(from 210deg, var(--c), var(--m), var(--y), var(--c));
  box-shadow: inset 0 0 0 1px rgba(255,255,255,.25), 0 1px 6px rgba(0,0,0,.18);
}

.wrap { flex: 1; width: 100%; max-width: 1080px; margin: 0 auto; padding: 22px 26px 60px; }

footer { border-top: 1px solid var(--line); padding: 14px; text-align: center; background: var(--card); }
footer a, .prose a { color: var(--ink-dim); font-size: 13px; }

/* ------------------------------------------------------------------- cards */
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 0 18px 4px; margin: 0 0 16px; min-width: 0;
}
.card > legend {
  font-size: 12.5px; font-weight: 650; text-transform: uppercase; letter-spacing: .08em;
  color: var(--ink-dim); padding: 0 8px; margin-left: -4px;
}
legend.toggle { cursor: pointer; user-select: none; display: flex; align-items: center; gap: 7px; }
.caret { transition: transform .15s; display: inline-block; color: var(--ink-faint); }
.card:not(.open) .caret { transform: rotate(-90deg); }
.card:not(.open) .card-body { display: none; }
.card-body { padding-bottom: 14px; }
.sub { margin: 4px 0 14px; font-size: 12.5px; color: var(--ink-faint); }

/* ------------------------------------------------------------------ fields */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px 16px; }
.field { display: flex; flex-direction: column; gap: 5px; font-size: 13px; color: var(--ink-dim); min-width: 0; }
.field > span { display: flex; align-items: center; gap: 5px; }
input[type=text], input[type=number], select, input[type=file] {
  width: 100%; padding: 8px 10px;
  background: var(--bg); color: var(--ink);
  border: 1px solid var(--line); border-radius: 7px;
  font: 13.5px/1.2 var(--mono);
}
input[type=file] { font-family: inherit; font-size: 12.5px; padding: 6px 8px; }
input:focus, select:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px rgba(31,122,176,.15); }
input:invalid { border-color: var(--bad); }
.field.is-check { flex-direction: row-reverse; justify-content: flex-end; align-items: center; gap: 9px; }
.field.is-check input[type=checkbox] { width: auto; accent-color: var(--accent); }

.info-btn {
  border: 0; background: none; padding: 0; cursor: help;
  color: var(--ink-faint); font-size: 12px; line-height: 1;
}
.info-btn:hover { color: var(--accent); }

.subgroup { margin-top: 18px; padding-top: 14px; border-top: 1px solid var(--line-soft); }
.subgroup h3, .subgroup h4 {
  margin: 0 0 10px; font-size: 12px; text-transform: uppercase; letter-spacing: .07em;
  color: var(--ink-faint); font-weight: 650; display: flex; align-items: center; gap: 5px;
}
.subgroup.nested { margin-top: 14px; padding-left: 12px; border-left: 2px solid var(--line-soft); border-top: 0; }

/* ------------------------------------------------------------ machine config */
.cfg-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; padding-bottom: 14px; }
@media (max-width: 640px) { .cfg-row { grid-template-columns: 1fr; } }
.with-btn { display: flex; gap: 7px; }
.icon {
  flex: none; width: 38px; border: 1px solid var(--line); border-radius: 7px;
  background: var(--bg); color: var(--ink-dim); cursor: pointer; font-size: 15px;
}
.icon:hover { border-color: var(--accent); color: var(--accent); }

/* ------------------------------------------------------------------ trays */
.tray { border: 1px solid var(--line-soft); border-radius: 9px; padding: 12px 14px; margin-bottom: 10px; }
.tray-water { background: linear-gradient(180deg, rgba(150,200,235,.10), transparent); }
.tray-head { display: flex; align-items: center; gap: 9px; margin-bottom: 10px; }
.tray-head b { font-size: 13.5px; }
.dot { width: 13px; height: 13px; border-radius: 4px; background: #999; flex: none; box-shadow: inset 0 0 0 1px rgba(0,0,0,.2); }
.dot[data-tray=water] { background: var(--water); }
.dot[data-tray=cyan] { background: var(--c); }
.dot[data-tray=magenta] { background: var(--m); }
.dot[data-tray=yellow] { background: var(--y); }
.dot[data-tray=kroma] { background: var(--k); }
.tray-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 12px; }
@media (max-width: 640px) { .tray-grid { grid-template-columns: 1fr; } }
.tag {
  font: 11px var(--mono); color: var(--ink-faint);
  border: 1px solid var(--line); border-radius: 999px; padding: 2px 8px;
}

/* ------------------------------------------------------------------ sketch */
.sketch-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 14px 18px 16px; margin-bottom: 16px;
}
.sketch-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 10px; }
.sketch-head h2 { margin: 0; font-size: 13px; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-dim); }
#machine-sketch {
  display: block; width: 100%; height: auto; border: 1px solid var(--line);
  border-radius: 7px; background: #fff; transition: opacity .2s;
}
#machine-sketch.greyed { opacity: .35; filter: grayscale(1); }
.sketch-note { margin: 8px 0 0; font-size: 12px; color: var(--ink-faint); }

/* ----------------------------------------------------------------- actions */
.actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 4px; }
button.primary, button.secondary {
  padding: 11px 20px; border-radius: 8px; font-size: 14.5px; font-weight: 600;
  cursor: pointer; border: 1px solid transparent; transition: background .15s, border-color .15s;
}
button.primary { background: var(--accent); color: #fff; }
button.primary:hover:not(:disabled) { background: var(--accent-dk); }
button.secondary { background: var(--card); color: var(--ink-dim); border-color: var(--line); }
button.secondary:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
button:disabled { opacity: .55; cursor: not-allowed; }

.error, .status {
  margin-top: 14px; padding: 10px 12px; border-radius: 7px;
  font: 12.5px/1.55 var(--mono); white-space: pre-wrap;
}
.error { background: rgba(192,57,43,.09); border: 1px solid rgba(192,57,43,.32); color: var(--bad); }
.status { background: rgba(31,122,176,.08); border: 1px solid rgba(31,122,176,.28); color: var(--accent); }

/* ------------------------------------------------------------- placeholder */
.placeholder { text-align: center; padding: 54px 20px; color: var(--ink-faint); }
.placeholder svg { width: 240px; height: 148px; }
.placeholder p { margin: 14px 0 0; font-size: 14px; }
.pl-bed, .pl-canvas { fill: none; stroke: var(--line); stroke-width: 2.5; }
.pl-canvas { stroke: var(--ink-faint); stroke-dasharray: 5 4; }
.pl-arm { stroke: var(--line); stroke-width: 3; }
.pl-arm-d { fill: var(--ink-faint); }
.pl-t1 { fill: var(--c); opacity: .6; } .pl-t2 { fill: var(--m); opacity: .6; } .pl-t3 { fill: var(--y); opacity: .6; }

/* ---------------------------------------------------------------- about */
.prose { max-width: 720px; }
.prose h2 { font-size: 15px; margin: 26px 0 8px; }
.prose code { font: 12.5px var(--mono); background: var(--card); border: 1px solid var(--line); border-radius: 4px; padding: 1px 5px; }
.prose li { margin-bottom: 6px; }
table.tools { border-collapse: collapse; font: 12.5px var(--mono); }
table.tools td { border: 1px solid var(--line); padding: 6px 11px; }
table.tools td.ok { color: var(--good); } table.tools td.bad { color: var(--bad); }

dialog#info-dialog {
  max-width: 84vw; border: 1px solid var(--line); border-radius: 10px;
  padding: 16px 18px; background: var(--card); color: var(--ink); font-size: 14px;
}
dialog#info-dialog::backdrop { background: rgba(0,0,0,.45); }

/* ------------------------------------------------------- match image ratio */
.ratio-btn {
  flex: none; white-space: nowrap; padding: 0 11px;
  border: 1px solid var(--line); border-radius: 7px;
  background: var(--bg); color: var(--ink-dim);
  font-size: 12.5px; cursor: pointer;
}
.ratio-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.ratio-btn:disabled { opacity: .45; cursor: not-allowed; }
.ratio-note { font: 11.5px var(--mono); color: var(--ink-faint); }
.ratio-note.warn { color: var(--warn); }

/* ---------------------------------------------------------------- woodcut */
.wc-preview { display: flex; align-items: center; gap: 10px; margin-top: 12px; flex-wrap: wrap; }
#wc-image {
  display: block; margin-top: 12px; max-width: 100%; border: 1px solid var(--line);
  border-radius: 7px; background: #fff;
}
#woodcut-panel input[type=range] { accent-color: var(--accent); }
#woodcut-panel output { float: right; font: 12px var(--mono); color: var(--accent); }

.subject-row {
  margin-top: 12px; padding: 10px 12px; border-radius: 7px;
  background: rgba(31,122,176,.07); border: 1px solid rgba(31,122,176,.24);
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
}
.subject-row .field.is-check { margin-top: 0; }

/* ------------------------------------------------------------ gcode preview */
#gcode-canvas {
  display: block; width: 100%; height: auto; background: #fff;
  border: 1px solid var(--line); border-radius: 8px;
}
.sim-controls { display: flex; align-items: center; gap: 12px; margin-top: 12px; flex-wrap: wrap; }
.sim-controls input[type=range] { flex: 1; min-width: 180px; accent-color: var(--accent); }
#sim-play { min-width: 86px; }
.sim-stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 10px; margin-top: 14px;
}
.sim-stat {
  background: var(--bg); border: 1px solid var(--line-soft); border-radius: 7px; padding: 9px 11px;
}
.sim-stat b { display: block; font: 15px/1.3 var(--mono); color: var(--ink); }
.sim-stat span { font-size: 11.5px; color: var(--ink-faint); text-transform: uppercase; letter-spacing: .06em; }
.sim-legend { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 10px; font-size: 12px; color: var(--ink-dim); }
.sim-legend i { display: inline-block; width: 22px; height: 3px; border-radius: 2px; margin-right: 5px; vertical-align: middle; }
.inline-file { color: var(--accent); cursor: pointer; text-decoration: underline; }