/* Vernier - professional, mobile-first toolkit for engineers. */

:root {
  --bg: #0c0e10;
  --surface: #14181c;
  --surface-2: #1a2026;
  --text: #e8eef4;
  --muted: #8a949e;
  --hairline: rgba(232, 238, 244, 0.08);
  --accent: #3d6b8c;
  --accent-soft: rgba(61, 107, 140, 0.18);
  --good: #3a9b6a;
  --warn: #c4923a;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;
  --mono: ui-monospace, "SF Mono", "Roboto Mono", Menlo, monospace;
  --bar-h: 52px;
  --tab-h: 60px;
  --pad: 16px;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  overscroll-behavior: none;
}

button { font: inherit; color: inherit; cursor: pointer; }

.app {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.topbar {
  height: var(--bar-h);
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 var(--pad);
  padding-top: env(safe-area-inset-top);
  border-bottom: 1px solid var(--hairline);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-back {
  background: none;
  border: none;
  font-size: 26px;
  line-height: 1;
  color: var(--text);
  padding: 0 6px 3px;
  margin-left: -6px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 8px;
  min-width: 0;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  color: inherit;
  font: inherit;
  text-align: left;
}
.brand:hover .brand-name { color: var(--text); }
.brand:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 6px;
  background: var(--accent);
  color: #fff;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.02em;
  align-self: center;
}

.brand-name { font-weight: 700; font-size: 17px; letter-spacing: -0.01em; }
.brand-by { color: var(--muted); font-size: 11px; }

.topnav { display: none; }

.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 8px; }

.install-btn {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--text);
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  border-radius: 999px;
  padding: 5px 12px;
}

.view {
  flex: 1;
  overflow: auto;
  padding: var(--pad);
  padding-bottom: calc(var(--tab-h) + env(safe-area-inset-bottom) + 12px);
}

.tabbar {
  position: fixed;
  left: 0; right: 0; bottom: 0;
  height: calc(var(--tab-h) + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  display: flex;
  background: var(--surface);
  border-top: 1px solid var(--hairline);
  z-index: 20;
}

.tab {
  flex: 1;
  background: none;
  border: none;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  color: var(--muted);
  font-size: 11px;
  padding: 6px 4px;
}

.tab.is-active { color: var(--text); }
.tab-ic { font-size: 16px; line-height: 1; }

.tool { display: flex; flex-direction: column; gap: 14px; max-width: 720px; margin: 0 auto; }
.tool-head h2 { margin: 0 0 4px; font-size: 22px; letter-spacing: -0.02em; }
.tool-head p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.4; }

.home-hero { margin-bottom: 8px; }
.home-hero h1 { margin: 0 0 8px; font-size: 28px; letter-spacing: -0.03em; }
.home-hero p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.45; max-width: 36em; }

.tool-grid { display: flex; flex-direction: column; gap: 10px; }
.tool-card {
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 14px 16px;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: 12px;
  row-gap: 4px;
}
.tool-card.is-hero { border-color: rgba(61, 107, 140, 0.45); background: linear-gradient(180deg, var(--accent-soft), var(--surface)); }
.tc-ic { grid-row: 1 / span 2; align-self: center; font-size: 22px; width: 28px; text-align: center; color: var(--accent); }
.tc-title { font-weight: 650; font-size: 15px; }
.tc-desc { color: var(--muted); font-size: 12.5px; line-height: 1.4; }
.trust-note { margin: 16px 0 0; text-align: center; color: var(--muted); font-size: 12px; }

.btn {
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 12px 16px;
  font-weight: 600;
  font-size: 14px;
}
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-block { width: 100%; }
.btn-row { display: flex; gap: 10px; }
.btn-row .btn { flex: 1; }
.btn:disabled { opacity: 0.45; cursor: default; }

.hint {
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
  margin: 0;
}
.hint b { color: var(--text); font-weight: 600; }

.status { font-size: 13px; color: var(--muted); }
.status.ok { color: var(--good); }
.status.err { color: #d45a5a; }

.note {
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 11px 14px;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.45;
}

.card {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.card-head {
  font-size: 12px;
  color: var(--muted);
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
}

.field { display: flex; flex-direction: column; gap: 6px; }
.field label { font-size: 12px; color: var(--muted); }
.input {
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  padding: 11px 12px;
  color: var(--text);
  font-size: 15px;
  width: 100%;
}
.field-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.field-grid .field:only-child { grid-column: 1 / -1; }

.stat-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.stat {
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 10px 8px;
  text-align: center;
}
.stat .v { font-family: var(--mono); font-size: 18px; font-weight: 700; font-variant-numeric: tabular-nums; }
.stat .l { font-size: 11px; color: var(--muted); margin-top: 2px; }

/* Viewer */
.view--viewer { display: flex; flex-direction: column; }

.viewer-grid {
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
  min-height: 0;
}

.viewer-side {
  display: flex;
  flex-direction: column;
  gap: 14px;
  order: 2;
}
.side-sec { display: flex; flex-direction: column; gap: 8px; }
.side-label {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
}
.side-sub { text-transform: none; letter-spacing: 0; }

.seg-row { display: flex; gap: 6px; }
.seg {
  flex: 1;
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: 10px;
  padding: 9px 6px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--muted);
}
.seg.is-active { color: var(--text); border-color: var(--accent); background: var(--accent-soft); }
.seg:disabled { opacity: 0.45; cursor: default; }
.btn-sm { padding: 9px 10px; font-size: 12.5px; }

.slider {
  width: 100%;
  accent-color: var(--accent);
  margin: 2px 0;
}
.slider:disabled { opacity: 0.4; }

.viewer-canvas-wrap {
  order: 1;
  flex: none;
  height: min(52dvh, 420px);
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--hairline);
  background:
    radial-gradient(ellipse at 30% 20%, rgba(61, 107, 140, 0.12), transparent 55%),
    linear-gradient(180deg, #101418 0%, #0c0e10 100%);
  touch-action: none;
}
.viewer-canvas-wrap canvas { display: block; width: 100%; height: 100%; }
.viewer-overlay {
  position: absolute;
  left: 12px; right: 12px; top: 12px;
  display: flex;
  justify-content: space-between;
  gap: 8px;
  pointer-events: none;
}
.viewer-overlay .pill {
  background: rgba(12, 14, 16, 0.72);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 6px 10px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  backdrop-filter: blur(8px);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.pill-hide-sm { display: none; }

.viewer-hud {
  position: absolute;
  left: 12px; right: 12px; bottom: 12px;
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  pointer-events: none;
}
.hud-chip {
  background: rgba(12, 14, 16, 0.78);
  border: 1px solid var(--hairline);
  border-radius: 8px;
  padding: 5px 9px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  backdrop-filter: blur(8px);
}

.measure-tip {
  position: absolute;
  top: 50px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent-soft);
  border: 1px solid rgba(61, 107, 140, 0.55);
  border-radius: 999px;
  padding: 7px 14px;
  font-size: 12.5px;
  color: var(--text);
  backdrop-filter: blur(8px);
  white-space: nowrap;
  pointer-events: none;
}
.measure-tip[hidden] { display: none; }

.viewer-meta {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
}
.viewer-meta b { color: var(--text); font-weight: 700; font-size: 14px; }
.dim-note { font-size: 11px; opacity: 0.8; }
.file-input { display: none; }

.sample-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-top: 8px; }
.sample-row .btn { flex: 1; min-width: 110px; }
.sample-dl-wrap { display: flex; flex-wrap: wrap; gap: 10px; width: 100%; }
.sample-row .sample-dl { font-size: 12px; }

/* ---- Desktop / laptop: sidebar layout, no page scroll ---- */
@media (min-width: 900px) {
  .tabbar { display: none; }

  .topnav { display: flex; gap: 4px; margin-left: 20px; }
  .topnav-link {
    background: none;
    border: none;
    border-radius: 8px;
    padding: 7px 12px;
    font-size: 13px;
    font-weight: 600;
    color: var(--muted);
  }
  .topnav-link:hover { color: var(--text); background: var(--surface-2); }
  .topnav-link.is-active { color: var(--text); background: var(--accent-soft); }

  .app { height: 100dvh; overflow: hidden; }
  .view { padding: 20px 24px; padding-bottom: 20px; overflow: auto; }

  .view--viewer { overflow: hidden; padding: 16px 20px; }
  .viewer-grid {
    display: grid;
    grid-template-columns: 268px minmax(0, 1fr);
    gap: 16px;
    height: 100%;
  }
  .viewer-side {
    order: 0;
    overflow-y: auto;
    padding-right: 2px;
  }
  .viewer-canvas-wrap { order: 0; height: 100%; }
  .pill-hide-sm { display: block; }

  .tool { max-width: 860px; }
  .home-hero h1 { font-size: 34px; }
  .tool-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
  .tool-card.is-hero { grid-column: 1 / -1; }
}

.result-list { display: flex; flex-direction: column; gap: 8px; }
.result-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 13px;
  padding: 8px 0;
  border-bottom: 1px solid var(--hairline);
}
.result-row:last-child { border-bottom: none; }
.result-row .k { color: var(--muted); }
.result-row .v { font-family: var(--mono); font-variant-numeric: tabular-nums; }

.unit-out {
  font-family: var(--mono);
  font-size: 22px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  padding: 8px 0 2px;
}

.install-sheet {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(0,0,0,0.55);
  display: flex;
  align-items: flex-end;
  justify-content: center;
}
.install-sheet-card {
  width: min(480px, 100%);
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 18px 18px 0 0;
  padding: 18px 18px calc(18px + env(safe-area-inset-bottom));
}
.install-sheet-card h3 { margin: 0 0 10px; font-size: 17px; }
.install-sheet-card ol { margin: 0; padding-left: 1.2em; color: var(--muted); font-size: 13px; line-height: 1.55; }
.install-sheet-card li { margin-bottom: 6px; }
.install-sheet-card b { color: var(--text); }
.install-note { margin: 10px 0 14px; color: var(--muted); font-size: 12px; }
.install-sheet-card .btn { width: 100%; }

.tool-wide { max-width: 920px; }
.tool-group { margin-top: 8px; }
.tool-group-label {
  font-family: var(--mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--muted);
  margin: 14px 0 8px;
}
.export-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 12px;
}
.export-hint { font-size: 12px; color: var(--muted); flex: 1; min-width: 140px; }
.input-area { resize: vertical; min-height: 72px; font-family: var(--font); line-height: 1.45; }
.sketch-canvas {
  height: 280px;
  border-radius: 14px;
  overflow: hidden;
  border: 1px solid var(--hairline);
  background: linear-gradient(180deg, #101418, #0c0e10);
}
.sketch-canvas canvas { display: block; width: 100%; height: 100%; }
.code-block {
  margin: 0;
  padding: 10px 12px;
  background: var(--surface-2);
  border-radius: 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--muted);
  overflow: auto;
  max-height: 140px;
}
.draw-preview {
  min-height: 160px;
  border-radius: 14px;
  border: 1px solid var(--hairline);
  background: var(--surface);
  display: grid;
  place-items: center;
  overflow: hidden;
}
.draw-preview img { display: block; max-width: 100%; max-height: 360px; object-fit: contain; }
.muted { color: var(--muted); font-size: 13px; }
.table-wrap { overflow: auto; border: 1px solid var(--hairline); border-radius: 12px; }
.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.data-table th, .data-table td {
  padding: 9px 10px;
  text-align: left;
  border-bottom: 1px solid var(--hairline);
  font-variant-numeric: tabular-nums;
}
.data-table th { color: var(--muted); font-weight: 600; font-size: 11px; text-transform: uppercase; letter-spacing: 0.06em; }
.data-table tr.is-sel { background: var(--accent-soft); }
.data-table tr[data-size], .data-table tr[data-awg] { cursor: pointer; }
.issue-list { margin: 0; padding-left: 1.1em; display: flex; flex-direction: column; gap: 6px; }
.issue { font-size: 13px; line-height: 1.4; }
.issue-ok { color: var(--good); }
.issue-warn { color: var(--warn); }
.issue-info { color: var(--muted); }

@media (min-width: 900px) {
  .tool-wide { max-width: 960px; }
  .tool-group .tool-grid { grid-template-columns: 1fr 1fr; }
}

.jobs-layout {
  display: grid;
  gap: 14px;
}
@media (min-width: 800px) {
  .jobs-layout {
    grid-template-columns: 240px minmax(0, 1fr);
    align-items: start;
  }
}
.jobs-list { display: flex; flex-direction: column; gap: 8px; margin-top: 12px; max-height: 60dvh; overflow: auto; }
.job-item {
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.job-item.is-active { border-color: var(--accent); background: var(--accent-soft); }
.job-item-title { font-weight: 650; font-size: 14px; }
.job-item-meta { font-size: 11px; color: var(--muted); font-family: var(--mono); }
.jobs-detail {
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.linkish {
  background: none;
  border: none;
  color: var(--accent);
  font: inherit;
  font-size: 12.5px;
  padding: 0;
  text-decoration: underline;
  cursor: pointer;
}
.pdf-frame-wrap {
  min-height: 360px;
  border-radius: 14px;
  border: 1px solid var(--hairline);
  background: var(--surface);
  overflow: hidden;
  display: grid;
  place-items: center;
}
.pdf-frame { width: 100%; height: min(70dvh, 640px); border: 0; background: #111; }
.scale-stage {
  position: relative;
  border-radius: 14px;
  border: 1px solid var(--hairline);
  background: var(--surface);
  overflow: auto;
  min-height: 200px;
  display: grid;
  place-items: center;
}
.scale-stage canvas { display: block; max-width: 100%; cursor: crosshair; touch-action: none; }
.gerber-canvas {
  display: block;
  width: 100%;
  max-width: 900px;
  border-radius: 14px;
  border: 1px solid var(--hairline);
  background: #0c1014;
  margin: 8px 0;
}
.bom-table .bom-input {
  padding: 7px 8px;
  font-size: 13px;
  min-width: 64px;
}
.bom-mini { margin-top: 4px; }

/* Home - smart drop + ask */
.home-hero-compact h1 { font-size: 26px; margin-bottom: 6px; }
.home-hero-compact p { font-size: 13.5px; max-width: 40em; }
.home-drop {
  border: 1.5px dashed rgba(232, 238, 244, 0.22);
  border-radius: 16px;
  background:
    radial-gradient(ellipse at 40% 0%, rgba(61, 107, 140, 0.14), transparent 55%),
    var(--surface);
  min-height: 120px;
  display: grid;
  place-items: center;
  padding: 22px 16px;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}
.home-drop.is-drag { border-color: var(--accent); background: var(--accent-soft); }
.home-drop-title { font-weight: 650; font-size: 16px; text-align: center; }
.home-drop-sub { margin-top: 6px; font-size: 12.5px; color: var(--muted); text-align: center; line-height: 1.4; }
.home-ask {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}
.home-ask-input { flex: 1; }
.home-suggest { margin-top: 16px; }
.suggest-list { display: flex; flex-direction: column; gap: 8px; }
.suggest-card {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  text-align: left;
  background: var(--surface);
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: 12px 14px;
}
.suggest-card:hover { border-color: rgba(61, 107, 140, 0.45); }
.suggest-body { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.chip-row { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 13px;
  font-weight: 600;
}
.chip:hover { border-color: var(--accent); }
.home-browse {
  margin-top: 18px;
  border: 1px solid var(--hairline);
  border-radius: 14px;
  background: var(--surface);
  padding: 4px 12px 12px;
}
.home-browse summary {
  cursor: pointer;
  font-weight: 650;
  font-size: 13px;
  color: var(--muted);
  padding: 10px 4px;
  list-style: none;
}
.home-browse summary::-webkit-details-marker { display: none; }
.browse-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.browse-item {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  column-gap: 10px;
  row-gap: 2px;
  text-align: left;
  background: var(--surface-2);
  border: 1px solid var(--hairline);
  border-radius: 12px;
  padding: 10px 12px;
}
.browse-item .tc-ic { grid-row: 1 / span 2; align-self: center; }
@media (min-width: 900px) {
  .browse-grid { display: grid; grid-template-columns: 1fr 1fr; }
  .home-hero-compact h1 { font-size: 32px; }
}