:root {
  --bg: #f3f4f6;
  --surface: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --primary: #1d4ed8;
  --primary-ink: #ffffff;
  --danger: #b91c1c;
  --ref: #2563eb;
  --approx: #ea8a00;
  --solve: #059669;
  --measure: #7c3aed;
  --radius: 8px;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  font-size: 14px;
  color: var(--text);
}
* { box-sizing: border-box; }
html, body { margin: 0; height: 100%; background: var(--bg); }
body { display: flex; flex-direction: column; }
[hidden] { display: none !important; }

button, input, select { font: inherit; }
input, select {
  border: 1px solid #d1d5db; border-radius: 6px; padding: 6px 8px; background: #fff; color: var(--text); min-width: 0;
}
input:focus, select:focus { outline: 2px solid #93c5fd; outline-offset: 0; border-color: #60a5fa; }
button {
  border: 1px solid #d1d5db; background: #fff; color: var(--text); border-radius: 6px; padding: 6px 12px; cursor: pointer;
}
button:hover { background: #f9fafb; }
button.primary { background: var(--primary); border-color: var(--primary); color: var(--primary-ink); }
button.primary:hover { background: #1e40af; }
button.danger { color: var(--danger); }
button.danger:hover { background: #fef2f2; border-color: #fca5a5; }
button.active { background: #ede9fe; border-color: var(--measure); color: #4c1d95; }
button.icon { padding: 2px 8px; }
.table .center { text-align: center; }
.export-head { display: inline-flex; align-items: center; gap: 4px; cursor: pointer; white-space: nowrap; }
.table input[type=checkbox] { width: 16px; height: 16px; cursor: pointer; vertical-align: middle; }
button.small { padding: 3px 10px; font-size: 12px; font-weight: normal; }
button.link { border: none; background: none; color: var(--primary); padding: 0; text-decoration: underline; }
button:disabled { opacity: .5; cursor: default; }

.topbar {
  display: flex; align-items: center; gap: 16px; padding: 10px 16px; background: #0f172a; color: #e2e8f0; flex: none;
}
.topbar .brand { display: flex; align-items: center; gap: 8px; color: #fff; text-decoration: none; font-weight: 600; }
.topbar #topbar-context { display: flex; align-items: center; gap: 12px; color: #cbd5e1; }
.topbar #topbar-context strong { color: #fff; }

.view { flex: 1; min-height: 0; }
#view-home { display: grid; grid-template-columns: minmax(280px, 360px) 1fr; gap: 16px; padding: 16px; align-items: start; align-content: start; overflow: auto; }
@media (max-width: 800px) { #view-home { grid-template-columns: 1fr; } }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.card h2 { margin: 0 0 12px; font-size: 16px; }
.card-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin-bottom: 12px; }
.card-head h2 { margin: 0; }
.card-head input { width: 260px; }

form label { display: flex; flex-direction: column; gap: 4px; margin-bottom: 10px; color: var(--muted); font-size: 12px; }
form label input { color: var(--text); font-size: 14px; }
.row { display: flex; gap: 10px; }
.row > * { flex: 1 1 0; min-width: 0; }
.row input { width: 100%; }
.hint { color: var(--muted); font-size: 12px; margin: 4px 0 10px; }
.upload-preview img { max-width: 100%; max-height: 180px; border: 1px solid var(--border); border-radius: 4px; display: block; }

.table { width: 100%; border-collapse: collapse; }
.table th { text-align: left; font-weight: 600; color: var(--muted); font-size: 12px; padding: 6px 8px; border-bottom: 1px solid var(--border); position: sticky; top: 0; background: var(--surface); }
.table td { padding: 6px 8px; border-bottom: 1px solid var(--border); vertical-align: middle; }
.table .num { text-align: right; font-variant-numeric: tabular-nums; }
.table td.actions { text-align: right; white-space: nowrap; }
.table td.actions button + button { margin-left: 6px; }
.table tr.clickable { cursor: pointer; }
.table tr.clickable:hover td { background: #f9fafb; }
.table tr.selected td { background: #eff6ff; }
.table.compact td, .table.compact th { padding: 4px 6px; }
.thumb { width: 64px; height: 40px; object-fit: cover; border-radius: 4px; border: 1px solid var(--border); display: block; }
.empty { color: var(--muted); text-align: center; padding: 16px; }

.badge { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 11px; font-weight: 600; }
.badge.reference { background: #dbeafe; color: #1e40af; }
.badge.approximate { background: #ffedd5; color: #9a3412; }

/* ---------- plan view ---------- */
.plan-view { display: flex; min-height: 0; }
.viewer-wrap { position: relative; flex: 1; min-width: 0; }
.viewer { position: absolute; inset: 0; background: #e5e7eb; overflow: hidden; touch-action: none; cursor: grab; }
.viewer.panning { cursor: grabbing; }
.viewer.measuring { cursor: crosshair; }
#plan-svg { position: absolute; inset: 0; width: 100%; height: 100%; display: block; user-select: none; }
#plan-img {
  position: absolute; left: 0; top: 0; transform-origin: 0 0; max-width: none; max-height: none;
  pointer-events: none; user-select: none; -webkit-user-drag: none;
}
/* While zooming/panning, keep the image on its own GPU layer: the frame is just re-composited. */
.viewer.moving #plan-img { will-change: transform; }
.image-notice {
  position: absolute; top: 60px; left: 10px; right: 10px; margin: 0 auto; max-width: 520px; z-index: 5;
  background: #fffbeb; border: 1px solid #fcd34d; border-radius: 10px; padding: 10px 12px; font-size: 13px;
  box-shadow: 0 2px 10px rgba(0,0,0,.15);
}
.image-notice .btn-row { margin-top: 8px; }
#plan-border { stroke: #475569; stroke-width: 1; }
.viewer-toolbar { position: absolute; top: 10px; left: 10px; display: flex; gap: 4px; align-items: center; background: rgba(255,255,255,.92); padding: 4px; border-radius: 8px; box-shadow: 0 1px 3px rgba(0,0,0,.15); }
.viewer-toolbar button { min-width: 34px; }
.viewer-toolbar .lock { display: flex; gap: 4px; align-items: center; padding: 0 6px; font-size: 12px; color: var(--muted); margin: 0; flex-direction: row; }
.cursor-readout { position: absolute; bottom: 10px; left: 10px; background: rgba(15,23,42,.8); color: #fff; padding: 3px 8px; border-radius: 6px; font-size: 12px; font-variant-numeric: tabular-nums; pointer-events: none; }
.mode-banner { position: absolute; top: 10px; left: 50%; transform: translateX(-50%); background: var(--measure); color: #fff; padding: 6px 12px; border-radius: 6px; font-size: 13px; box-shadow: 0 1px 3px rgba(0,0,0,.2); pointer-events: none; opacity: .95; }

.pin { cursor: grab; }
.pin.locked { cursor: pointer; }
.pin-shape { stroke: #fff; stroke-width: 1.5; }
.pin-shape.ref { fill: var(--ref); }
.pin-shape.approx { fill: var(--approx); }
.pin.selected .pin-shape { stroke: #0f172a; stroke-width: 2.5; }
.viewer.picking .pin { cursor: pointer; }
.viewer.picking .pin:hover .pin-shape { stroke: var(--measure); stroke-width: 3; }
.viewer.picking .pin.selected { opacity: .6; cursor: not-allowed; }
.pin.measured .pin-shape { stroke: var(--measure); stroke-width: 2.5; }
.pin.highlight .pin-shape { stroke: var(--measure); stroke-width: 4; }
.meas-target { white-space: nowrap; }
.meas-table tr[data-target]:hover td { background: #f5f3ff; }
.pin-tip { fill: #fff; stroke: #0f172a; stroke-width: 1.2; }
.pin-label { font-size: 12px; font-weight: 600; fill: #0f172a; paint-order: stroke; stroke: #fff; stroke-width: 3px; stroke-linejoin: round; pointer-events: none; }
.ghost .pin-shape { fill: rgba(5,150,105,.35); stroke: var(--solve); stroke-dasharray: 3 2; stroke-width: 1.5; }
.measure-line { stroke: var(--measure); stroke-width: 1.5; stroke-dasharray: 6 4; }
.measure-line.point { stroke-dasharray: none; stroke-width: 2; }
.circle-line { fill: none; stroke: var(--solve); stroke-width: 1; stroke-dasharray: 4 3; opacity: .7; }
.shift-line { stroke: var(--solve); stroke-width: 1.5; }
.measure-label { font-size: 12px; font-weight: 600; fill: #4c1d95; paint-order: stroke; stroke: #fff; stroke-width: 3.5px; stroke-linejoin: round; pointer-events: none; }
.measure-point { fill: var(--measure); stroke: #fff; stroke-width: 1.5; }

.sidebar { width: 440px; flex: none; overflow-y: auto; background: var(--surface); border-left: 1px solid var(--border); }
@media (max-width: 900px) { .sidebar { width: 340px; } }
.panel { padding: 14px 16px; border-bottom: 1px solid var(--border); }
.panel h3 { margin: 0 0 10px; font-size: 15px; display: flex; align-items: center; gap: 8px; }
.panel h4 { margin: 14px 0 6px; font-size: 13px; }
.anchor-form { display: flex; gap: 6px; margin-bottom: 8px; }
.anchor-form input { flex: 1; }
#anchor-search { width: 100%; margin-bottom: 6px; }
.table-scroll { max-height: 300px; overflow-y: auto; }

.field-grid { display: grid; grid-template-columns: auto 1fr; gap: 6px 10px; align-items: center; }
.field-grid > span { color: var(--muted); font-size: 12px; }
.xy { display: flex; gap: 6px; }
.xy input { width: 100%; }
.seg { display: inline-flex; border: 1px solid #d1d5db; border-radius: 6px; overflow: hidden; }
.seg button { border: none; border-radius: 0; padding: 5px 12px; }
.seg button + button { border-left: 1px solid #d1d5db; }
.seg button.on.reference { background: var(--ref); color: #fff; }
.seg button.on.approximate { background: var(--approx); color: #fff; }
.btn-row { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 10px; }

.meas-table input[type=number] { width: 86px; text-align: right; }
.meas-table select { width: 100%; max-width: 170px; }
.muted { color: var(--muted); }
.small { font-size: 12px; }
.resid-ok { color: var(--solve); }
.resid-warn { color: #b45309; }
.resid-bad { color: var(--danger); }
.result-box { margin-top: 10px; border: 1px solid #a7f3d0; background: #ecfdf5; border-radius: 6px; padding: 10px; }
.result-box .big { font-size: 15px; font-weight: 600; font-variant-numeric: tabular-nums; }
.warn-box { margin-top: 8px; border: 1px solid #fcd34d; background: #fffbeb; border-radius: 6px; padding: 8px; font-size: 12px; }

.anchor-form #scan-serial { white-space: nowrap; padding: 6px 8px; }

.modal-overlay { position: fixed; inset: 0; background: rgba(15,23,42,.6); display: flex; align-items: center; justify-content: center; z-index: 20; padding: 16px; }
.modal { background: var(--surface); border-radius: 10px; padding: 16px; width: min(560px, 100%); box-shadow: 0 10px 30px rgba(0,0,0,.3); }
.modal-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; }
.modal-head h3 { margin: 0; font-size: 16px; }
.scanner-video { position: relative; background: #000; border-radius: 8px; overflow: hidden; aspect-ratio: 4 / 3; }
.scanner-video video { width: 100%; height: 100%; object-fit: cover; display: block; }
.scanner-video video.mirror { transform: scaleX(-1); }
.scanner-frame { position: absolute; inset: 18% 24%; border: 3px solid rgba(255,255,255,.85); border-radius: 12px; box-shadow: 0 0 0 9999px rgba(0,0,0,.25); pointer-events: none; }
.scanner-controls { display: flex; gap: 10px; align-items: center; margin-top: 10px; flex-wrap: wrap; }
.scanner-controls select { max-width: 220px; }
.scanner-status { font-size: 13px; color: var(--muted); flex: 1; }

.toast { position: fixed; bottom: 18px; left: 50%; transform: translateX(-50%); background: #111827; color: #fff; padding: 8px 14px; border-radius: 6px; box-shadow: 0 2px 8px rgba(0,0,0,.25); z-index: 30; max-width: calc(100vw - 24px); }
.toast.error { background: var(--danger); }

/* ---------- shared additions ---------- */
.nowrap { white-space: nowrap; }
.table-x { overflow-x: auto; }
.card-head-tools { display: flex; gap: 8px; align-items: center; }
.mode-badge { background: #065f46; color: #d1fae5; font-size: 11px; font-weight: 600; padding: 2px 8px; border-radius: 999px; white-space: nowrap; }
.back-link { color: #93c5fd; text-decoration: none; white-space: nowrap; }
.plan-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; min-width: 0; }
.topbar #topbar-context { min-width: 0; }
.pin-hit { fill: transparent; }

/* touch vs mouse specific UI (body.touch is set by app.js) */
body:not(.touch) .touch-only { display: none !important; }
body.touch .mouse-only { display: none !important; }
body.touch button { min-height: 36px; }
body.touch button.icon { min-width: 36px; }
body.touch .table input[type=checkbox] { width: 22px; height: 22px; }

.nudge { display: flex; gap: 4px; align-items: center; flex-wrap: wrap; }
.nudge > button { min-width: 40px; font-size: 16px; padding: 4px 8px; }
.small-seg button { padding: 4px 8px; font-size: 12px; }

/* crosshair placement */
.crosshair {
  position: absolute; left: 50%; top: 50%; width: 64px; height: 64px; transform: translate(-50%, -50%); pointer-events: none;
  background:
    linear-gradient(#dc2626, #dc2626) left center / 24px 2px no-repeat,
    linear-gradient(#dc2626, #dc2626) right center / 24px 2px no-repeat,
    linear-gradient(#dc2626, #dc2626) center top / 2px 24px no-repeat,
    linear-gradient(#dc2626, #dc2626) center bottom / 2px 24px no-repeat;
  filter: drop-shadow(0 0 1px #fff) drop-shadow(0 0 1px #fff);
}
.place-bar {
  position: absolute; left: 10px; right: 10px; bottom: 10px; margin: 0 auto; max-width: 560px;
  background: var(--surface); border-radius: 10px; padding: 10px 12px; box-shadow: 0 4px 14px rgba(0,0,0,.25);
  display: flex; flex-wrap: wrap; gap: 6px 12px; align-items: center;
}
.place-text { flex: 1 1 100%; font-size: 13px; color: var(--muted); }
.place-readout { flex: 1; font-weight: 600; font-variant-numeric: tabular-nums; }
.place-buttons { display: flex; gap: 6px; }
body.placing .cursor-readout, .cursor-readout:empty { display: none; }

/* phone single-screen pieces (shown only in the phone layout below) */
.screen-tabs {
  display: none; flex: none; border-top: 1px solid var(--border); background: var(--surface);
  padding-bottom: env(safe-area-inset-bottom);
}
.screen-tabs button {
  flex: 1; border: none; border-radius: 0; background: none; padding: 10px 0; font-weight: 600; color: var(--muted);
  border-top: 3px solid transparent; min-height: 52px;
}
.screen-tabs button.active { color: var(--primary); border-top-color: var(--primary); background: #f8fafc; }
.tab-icon { font-size: 16px; }
.tab-count { display: inline-block; min-width: 20px; padding: 0 6px; border-radius: 999px; background: #e2e8f0; color: var(--text); font-size: 11px; }
.map-chip {
  display: none; position: absolute; left: 10px; right: 10px; bottom: 10px; margin: 0 auto; max-width: 520px;
  background: var(--surface); border-radius: 10px; padding: 8px 10px 8px 12px; box-shadow: 0 2px 10px rgba(0,0,0,.2);
  align-items: center; gap: 10px;
}
#map-chip-text { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-variant-numeric: tabular-nums; }
.mode-banner { display: flex; align-items: center; gap: 10px; }
.mode-banner #mode-text { flex: 1; }
.mode-banner button { pointer-events: auto; background: #fff; color: #4c1d95; border-color: #fff; }

/* ---------- phone layout ---------- */
@media (max-width: 760px) {
  .topbar { gap: 10px; padding: 8px 12px; }
  body.plan-open .brand-name { display: none; }
  .hide-narrow { display: none; }
  #view-home { padding: 10px; gap: 10px; grid-template-columns: minmax(0, 1fr); }
  #plan-rows td.actions { white-space: normal; text-align: right; }
  #plan-rows td.actions button { margin: 2px 0 2px 4px; }
  #plan-rows .thumb { width: 48px; height: 32px; }
  .list-card { order: -1; } /* existing plans first on a phone */
  .toast { bottom: auto; top: 64px; }
  .card { padding: 12px; }
  .card-head { flex-wrap: wrap; }
  .card-head-tools { flex: 1 1 100%; }
  .card-head-tools input { flex: 1; width: auto; }
  .col-created { display: none; }

  /* Single-screen layout: either the map or the anchor panel fills the screen. */
  .plan-view { flex-direction: column; }
  .viewer-wrap { flex: 1; min-height: 0; }
  .sidebar { width: 100%; flex: 1; min-height: 0; border-left: none; }
  body[data-screen="map"] .sidebar { display: none; }
  body[data-screen="list"] .viewer-wrap { display: none; }
  .screen-tabs { display: flex; }
  body.placing .screen-tabs { display: none; }
  .map-chip { display: flex; }
  .panel { padding: 10px 12px 12px; }
  .panel h3 { flex-wrap: wrap; }
  .anchor-form { flex-wrap: wrap; }
  .anchor-form input { flex: 1 1 calc(100% - 120px); }
  .anchor-form select, .anchor-form button[type=submit] { flex: 1 1 40%; }
  .table-scroll { max-height: none; overflow-x: auto; }
  .mode-banner { top: auto; bottom: 10px; left: 10px; right: 10px; transform: none; text-align: center; }
  .viewer-toolbar .lock { font-size: 11px; padding: 0 4px; }
  .field-grid { grid-template-columns: auto minmax(0, 1fr); }
}