/* ================================================================
   Spray Diagram Builder — Better Biosecurity
   ================================================================ */

:root {
  --air:        #2563EB;
  --water:      #1a1a1a;
  --head-red:   #DC2626;
  --sel:        #2563EB;
  --ink:        #111827;
  --muted:      #6b7280;
  --rule:       #e5e5e0;
  --panel-bg:   #f7f6f2;
  --card:       #ffffff;
  --toolbar-bg: #1a1c23;
  --radius:     8px;
  --font:       'Inter', -apple-system, sans-serif;
  --mono:       'IBM Plex Mono', 'SF Mono', Menlo, monospace;
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; overflow: hidden; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--panel-bg);
  -webkit-font-smoothing: antialiased;
}
button { font-family: inherit; cursor: pointer; }
input  { font-family: inherit; }

/* ── App shell ──────────────────────────────────────────────── */
.app {
  height: 100vh;
  display: grid;
  grid-template-rows: 50px 1fr;
  overflow: hidden;
}

/* ── Header ─────────────────────────────────────────────────── */
.header {
  background: #fff;
  border-bottom: 1px solid var(--rule);
  display: flex;
  align-items: center;
  padding: 0 14px;
  gap: 10px;
  flex-shrink: 0;
  z-index: 20;
}

.header-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.header-logo { height: 28px; width: auto; object-fit: contain; }
.header-pipe { color: #d1d5db; font-size: 18px; }
.header-appname {
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  white-space: nowrap;
}

.header-fields {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
}
.hf {
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 5px 8px;
  font-size: 13px;
  background: transparent;
  color: var(--ink);
  outline: none;
  transition: border-color 120ms, background 120ms;
}
.hf:hover  { border-color: var(--rule); background: #fafafa; }
.hf:focus  { border-color: var(--sel); background: #fff; box-shadow: 0 0 0 2px rgba(37,99,235,.12); }
.hf::placeholder { color: #b0b0aa; }
.hf-title  { flex: 1; min-width: 0; font-weight: 500; }
.hf-sm     { width: 130px; flex-shrink: 0; }
.hf-dash   { color: #ccc; flex-shrink: 0; }

.header-actions {
  display: flex;
  align-items: center;
  gap: 5px;
  flex-shrink: 0;
}
.hbtn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 11px;
  border: 1px solid var(--rule);
  border-radius: 7px;
  background: #fff;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--ink);
  white-space: nowrap;
  transition: background 100ms, border-color 100ms;
}
.hbtn:hover { background: #f3f4f6; border-color: #ccc; }
.hbtn:active { transform: translateY(1px); }
.hbtn:disabled { opacity: .4; pointer-events: none; }
.hbtn-primary {
  background: var(--ink);
  color: #fff;
  border-color: var(--ink);
}
.hbtn-primary:hover { background: #374151; }
.hbtn-logout { color: #b91c1c; }
.hbtn-logout:hover { background: #fef2f2; border-color: #fca5a5; color: #991b1b; }
.hbtn-sep {
  width: 1px;
  height: 22px;
  background: var(--rule);
  margin: 0 2px;
}

/* ── Workspace grid ─────────────────────────────────────────── */
.workspace {
  display: grid;
  grid-template-columns: 52px 1fr 270px;
  min-height: 0;
  overflow: hidden;
}

/* ── Left toolbar ───────────────────────────────────────────── */
.toolbar {
  background: var(--toolbar-bg);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 0;
  gap: 3px;
  border-right: 1px solid #2a2d36;
  user-select: none;
}
.tb-group { display: flex; flex-direction: column; align-items: center; gap: 3px; }
.tb-sep   { width: 28px; height: 1px; background: #2a2d36; margin: 6px 0; }
.tb-bottom { margin-top: auto; display: flex; flex-direction: column; gap: 3px; align-items: center; }

.tbtn {
  width: 36px;
  height: 36px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: #6b7280;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 100ms, color 100ms;
}
.tbtn svg { width: 18px; height: 18px; }
.tbtn:hover  { background: #2a2d36; color: #d1d5db; }
.tbtn.active { background: var(--sel); color: #fff; }

/* ── Canvas ─────────────────────────────────────────────────── */
.canvas-wrap {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  overflow: hidden;
  background: #fff;
}
.canvas-svg {
  flex: 1;
  display: block;
  cursor: default;
  /* Grid dots updated via JS CSS variables */
  background-color: #fff;
  background-image:
    radial-gradient(circle, rgba(0,0,0,0.32) var(--dot-r-lg, 1.4px), transparent var(--dot-r-lg, 1.4px)),
    radial-gradient(circle, rgba(0,0,0,0.12) var(--dot-r-sm, 0.8px), transparent var(--dot-r-sm, 0.8px));
  background-size: var(--grid-lg, 50px) var(--grid-lg, 50px),
                   var(--grid-sm, 10px) var(--grid-sm, 10px);
  background-position: var(--grid-ox, 0px) var(--grid-oy, 0px),
                        var(--grid-ox, 0px) var(--grid-oy, 0px);
}

/* Tool-specific cursors */
.canvas-svg.tool-select    { cursor: default; }
.canvas-svg.tool-line      { cursor: crosshair; }
.canvas-svg.tool-rect      { cursor: crosshair; }
.canvas-svg.tool-dimension { cursor: crosshair; }
.canvas-svg.tool-text      { cursor: text; }
.canvas-svg.tool-place     { cursor: copy; }
.canvas-svg.panning        { cursor: grabbing; }

/* ── Canvas bottom controls ─────────────────────────────────── */
.canvas-controls {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 12px;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(4px);
  border-top: 1px solid var(--rule);
  gap: 12px;
  z-index: 5;
  pointer-events: none;
}
.zoom-bar {
  display: flex;
  align-items: center;
  gap: 2px;
  pointer-events: auto;
}
.zbtn {
  width: 28px;
  height: 26px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: #fff;
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 100ms;
}
.zbtn:hover { background: #f3f4f6; }
.zoom-pct { font-size: 11px; font-family: var(--mono); width: 48px; }

.status-bar {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 11.5px;
  pointer-events: none;
}
.st-mode  { font-weight: 600; color: var(--ink); }
.st-coords { font-family: var(--mono); color: var(--muted); }
.st-hint  { color: var(--muted); }

/* ── Right panel ─────────────────────────────────────────────── */
.panel {
  background: var(--panel-bg);
  border-left: 1px solid var(--rule);
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
}
.panel-sec {
  padding: 14px 14px 12px;
  border-bottom: 1px solid var(--rule);
}
.panel-sec-grow { flex: 1; }
.panel-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 9px;
}
.panel-hint {
  font-size: 11.5px;
  color: var(--muted);
  line-height: 1.5;
  margin: 8px 0 0;
}
.panel-hint kbd {
  display: inline-block;
  padding: 1px 5px;
  border: 1px solid #d1d5db;
  border-radius: 4px;
  font-family: var(--mono);
  font-size: 10px;
  background: #fff;
}

/* Line kind toggle */
.line-toggle {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.ltbtn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border: 1px solid var(--rule);
  border-radius: 7px;
  background: #fff;
  font-size: 12.5px;
  font-weight: 500;
  color: var(--ink);
  transition: border-color 100ms, background 100ms;
}
.ltbtn:hover { border-color: #bbb; }
.ltbtn.active.air-active   { border-color: var(--air); background: #eff6ff; color: #1e40af; }
.ltbtn.active.water-active { border-color: #374151; background: #f9fafb; color: #1a1a1a; }
.lt-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}
.lt-air   { background: var(--air); }
.lt-water { background: var(--water); }

/* Component palette */
.palette { display: flex; flex-direction: column; gap: 5px; }
.pal-btn {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 6px 10px;
  border: 1px solid var(--rule);
  border-radius: 7px;
  background: #fff;
  font-size: 12px;
  font-weight: 500;
  color: var(--ink);
  text-align: left;
  transition: border-color 100ms, background 100ms;
}
.pal-btn:hover { border-color: var(--air); background: #eff6ff; }
.pal-btn.active { border-color: var(--air); background: #dbeafe; color: #1e40af; }
.pal-icon { width: 30px; height: 30px; flex-shrink: 0; overflow: visible; }

/* Properties panel */
.props-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 20px 10px;
  color: #bbb;
  font-size: 12px;
}
.props-row {
  display: grid;
  grid-template-columns: 80px 1fr;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 12.5px;
}
.props-row label { color: var(--muted); font-size: 11.5px; }
.props-row input,
.props-row select {
  width: 100%;
  padding: 5px 8px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  font-size: 12.5px;
  background: #fff;
  color: var(--ink);
  outline: none;
  font-family: inherit;
}
.props-row input:focus,
.props-row select:focus { border-color: var(--sel); box-shadow: 0 0 0 2px rgba(37,99,235,.1); }
.props-val {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink);
}
.props-hint { font-size: 11px; color: var(--sub); font-style: italic; margin: 6px 0 2px; }
.props-actions { display: flex; gap: 6px; margin-top: 10px; flex-wrap: wrap; }
.pbtn {
  flex: 1;
  padding: 6px 8px;
  border: 1px solid var(--rule);
  border-radius: 6px;
  background: #fff;
  font-size: 12px;
  font-weight: 500;
  color: var(--ink);
  transition: background 100ms, border-color 100ms;
  min-width: 0;
  white-space: nowrap;
}
.pbtn:hover { background: #f3f4f6; border-color: #bbb; }
.pbtn-danger { color: #dc2626; border-color: #fecaca; }
.pbtn-danger:hover { background: #fef2f2; border-color: #fca5a5; }
.pbtn-primary { background: var(--ink); color: #fff; border-color: var(--ink); }
.pbtn-primary:hover { background: #374151; }

.props-section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted);
  margin: 12px 0 8px;
}
.props-section-title:first-child { margin-top: 0; }

.rotation-btns {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
}
.rot-btn {
  padding: 5px 0;
  border: 1px solid var(--rule);
  border-radius: 5px;
  background: #fff;
  font-size: 11px;
  font-family: var(--mono);
  color: var(--muted);
  transition: background 100ms;
}
.rot-btn:hover { background: #f3f4f6; }
.rot-btn.active { background: var(--ink); color: #fff; border-color: var(--ink); }

/* ── Export modal ────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.45);
  display: flex; align-items: center; justify-content: center;
  z-index: 999;
}
.modal-overlay[hidden] { display: none; }
.modal {
  background: #fff;
  border-radius: 10px;
  padding: 24px 28px;
  min-width: 300px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.18);
}
.modal-title { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.modal-body  { font-size: 13px; color: var(--sub); margin: 0 0 16px; }
.modal-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.modal-actions .hbtn { flex: 1; justify-content: center; }

/* ── Print sheet ─────────────────────────────────────────────── */
.print-sheet { display: none; }

/* Page structure (also used for on-screen preview before print) */
.pt-page {
  width: 100%;
  display: flex;
  flex-direction: column;
  background: #fff;
  font-family: var(--font);
  box-sizing: border-box;
  overflow: hidden;
}

/* Header */
.pt-hd {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 10px 22px;
  border-bottom: 1px solid #e5e7eb;
  flex-shrink: 0;
}
.pt-hd-logo  { height: 34px; width: auto; }
.pt-hd-sep   { width: 1px; height: 34px; background: #d1d5db; flex-shrink: 0; }
.pt-hd-info  { flex: 1; min-width: 0; }
.pt-hd-customer {
  font-size: 13pt;
  font-weight: 700;
  color: #111827;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  line-height: 1.2;
}
.pt-hd-title { font-size: 9.5pt; color: #6b7280; margin-top: 1px; }
.pt-hd-badge {
  flex-shrink: 0;
  padding: 5px 14px;
  border-radius: 4px;
  font-size: 9pt;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.pt-badge-air   { background: #eff6ff; color: #1d4ed8; border: 1.5px solid #bfdbfe; }
.pt-badge-water { background: #f9fafb; color: #374151; border: 1.5px solid #d1d5db; }

/* Accent stripe */
.pt-accent-bar { height: 3px; flex-shrink: 0; }

/* Diagram area */
.pt-diagram {
  flex: 1;
  min-height: 0;
  padding: 6px 18px;
  display: flex;
  align-items: stretch;
}
.pt-diagram svg { display: block; }

/* Footer */
.pt-foot {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 8px 22px 10px;
  border-top: 1px solid #e5e7eb;
  background: #fafafa;
  flex-shrink: 0;
}
.pt-legend-block { flex: 1; min-width: 0; }
.pt-legend-label {
  font-size: 7pt;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #9ca3af;
  margin-bottom: 5px;
}
.pt-legend-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2px 18px;
}
.pt-legend-item {
  display: flex;
  align-items: center;
  gap: 5px;
  font-size: 9pt;
  color: #374151;
}
.pt-legend-icon { display: flex; align-items: center; flex-shrink: 0; }
.pt-info-block  { text-align: right; flex-shrink: 0; }
.pt-info-row {
  display: flex;
  gap: 14px;
  justify-content: flex-end;
  font-size: 9pt;
  line-height: 1.7;
  color: #9ca3af;
}
.pt-info-row span:last-child { color: #111827; font-weight: 600; }

@media print {
  @page { size: 11in 8.5in landscape; margin: 0; }
  .app          { display: none !important; }
  .print-sheet  { display: block !important; }
  * { -webkit-print-color-adjust: exact; print-color-adjust: exact; }

  .pt-page {
    width: 11in;
    height: 8.5in;
    overflow: hidden;
    page-break-after: always;
    break-after: page;
  }
  .pt-page:last-child {
    page-break-after: avoid;
    break-after: avoid;
  }
  .pt-diagram {
    height: 0;           /* overridden by flex:1 but prevents expansion beyond page */
  }
}

/* ── Misc utilities ──────────────────────────────────────────── */
.entity    { cursor: pointer; }
.hit-proxy { cursor: pointer; fill: transparent; }

/* Snap indicator ring */
.snap-ring {
  fill: none;
  stroke: var(--sel);
  stroke-width: 1.5;
  pointer-events: none;
}

/* Selected entity glow */
.selected-glow {
  fill: none;
  stroke: var(--sel);
  stroke-width: 1;
  stroke-dasharray: 3 2;
  pointer-events: none;
  opacity: 0.7;
}

/* ── Login splash ────────────────────────────────────────────── */
.login-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: #f7f6f2;
  display: flex;
  align-items: center;
  justify-content: center;
}
.login-overlay.hidden { display: none; }

.login-card {
  background: #fff;
  border: 1px solid #e5e5e0;
  border-radius: 12px;
  padding: 40px 44px 36px;
  width: 340px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  box-shadow: 0 4px 24px rgba(0,0,0,0.08);
}

.login-logo {
  height: 36px;
  margin-bottom: 16px;
  object-fit: contain;
}

.login-title {
  font-size: 18px;
  font-weight: 600;
  color: #111827;
  margin: 0 0 4px;
  letter-spacing: -0.01em;
}

.login-sub {
  font-size: 12px;
  color: #9ca3af;
  margin: 0 0 28px;
}

.login-form {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.login-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.login-field label {
  font-size: 11px;
  font-weight: 500;
  color: #6b7280;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.login-field input {
  height: 36px;
  padding: 0 10px;
  border: 1px solid #d1d5db;
  border-radius: 6px;
  font-size: 13px;
  color: #111827;
  background: #fff;
  outline: none;
  transition: border-color 0.15s;
}
.login-field input:focus { border-color: #2563EB; box-shadow: 0 0 0 3px rgba(37,99,235,0.12); }

.login-error {
  font-size: 12px;
  color: #DC2626;
  min-height: 16px;
  text-align: center;
}

.login-btn {
  margin-top: 4px;
  height: 38px;
  background: #2563EB;
  color: #fff;
  border: none;
  border-radius: 6px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s;
  font-family: var(--font);
}
.login-btn:hover { background: #1d4ed8; }
.login-btn:active { background: #1e40af; }