@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

.custom-area-calculator-wrap {
  --custom-area-calculator-teal: #0D9488;
  --custom-area-calculator-teal-light: #14B8A6;
  --custom-area-calculator-teal-dark: #0F766E;
  --custom-area-calculator-navy: #0F172A;
  --custom-area-calculator-navy-mid: #1E293B;
  --custom-area-calculator-white: #FFFFFF;
  --custom-area-calculator-gray: #F1F5F9;
  --custom-area-calculator-gray-mid: #E2E8F0;
  --custom-area-calculator-text: #0F172A;
  --custom-area-calculator-text-muted: #64748B;
  --custom-area-calculator-red: #DC2626;
}

.custom-area-calculator-wrap * { box-sizing: border-box; }

.custom-area-calculator-wrap {
  font-family: 'Inter', sans-serif;
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
  color: var(--custom-area-calculator-text);
}

/* Header */
.custom-area-calculator-header {
  background: linear-gradient(135deg, var(--custom-area-calculator-navy), var(--custom-area-calculator-navy-mid));
  color: white;
  padding: 40px;
  border-radius: 16px;
  text-align: center;
  margin-bottom: 20px;
}
.custom-area-calculator-header-icon { font-size: 48px; margin-bottom: 10px; }
.custom-area-calculator-header h2 { font-size: 30px; font-weight: 800; margin-bottom: 6px; }
.custom-area-calculator-header p { opacity: 0.7; font-size: 15px; }

/* Unit Bar */
.custom-area-calculator-unit-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.custom-area-calculator-unit-label { font-weight: 600; color: var(--custom-area-calculator-navy); font-size: 14px; }
.custom-area-calculator-unit-btns { display: flex; gap: 8px; flex-wrap: wrap; }
.custom-area-calculator-wrap .custom-area-calculator-unit-btn {
  padding: 8px 16px;
  border: 2px solid var(--custom-area-calculator-gray-mid);
  border-radius: 8px;
  background: white;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  color: var(--custom-area-calculator-text-muted) !important;
  transition: all 0.2s;
}
.custom-area-calculator-wrap .custom-area-calculator-unit-btn.active,
.custom-area-calculator-wrap .custom-area-calculator-unit-btn:hover {
  background: var(--custom-area-calculator-teal);
  color: white !important;
  border-color: var(--custom-area-calculator-teal);
}

/* Calc Panel */
.custom-area-calculator-panel {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Input Side */
.custom-area-calculator-input-side {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.custom-area-calculator-shape-display {
  background: var(--custom-area-calculator-navy);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  min-height: 560px;
  width: 100%;
  position: relative;
}
#customAreaCalculatorCanvas { display: block; cursor: crosshair; width: 100%; max-width: 100%; height: auto; }

/* Icon toolbar, overlaid on the canvas itself so every tool is reachable
   without scrolling down the page. */
.custom-area-calculator-icon-toolbar {
  position: absolute;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  background: rgba(15, 23, 42, 0.88);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 12px;
  padding: 6px;
  backdrop-filter: blur(4px);
  flex-wrap: wrap;
  max-width: calc(100% - 32px);
}
.custom-area-calculator-icon-toolbar-sep {
  width: 1px;
  align-self: stretch;
  background: rgba(255, 255, 255, 0.15);
  margin: 4px 2px;
}
.custom-area-calculator-wrap .custom-area-calculator-icon-btn {
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: white !important;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  cursor: pointer;
  transition: all 0.15s;
}
.custom-area-calculator-wrap .custom-area-calculator-icon-btn:hover {
  background: rgba(255, 255, 255, 0.12);
}
.custom-area-calculator-wrap .custom-area-calculator-icon-btn.active {
  background: var(--custom-area-calculator-teal);
  color: white !important;
}
.custom-area-calculator-wrap .custom-area-calculator-icon-btn-danger:hover {
  background: var(--custom-area-calculator-red);
}

.custom-area-calculator-zoom-hint-overlay {
  position: absolute;
  bottom: 10px;
  left: 28px;
  color: rgba(255, 255, 255, 0.55) !important;
  margin: 0 !important;
  background: rgba(15, 23, 42, 0.7);
  padding: 4px 10px;
  border-radius: 999px;
}
@media (max-width: 640px) {
  .custom-area-calculator-icon-toolbar { top: 10px; max-width: calc(100% - 20px); }
  .custom-area-calculator-zoom-hint-overlay { display: none; }
}

.custom-area-calculator-zoom-hint {
  font-size: 11px;
  color: var(--custom-area-calculator-text-muted);
  margin-left: 4px;
}

/* Fields */
.custom-area-calculator-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.custom-area-calculator-field label {
  font-size: 12px;
  font-weight: 600;
  color: var(--custom-area-calculator-navy);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.custom-area-calculator-field-row {
  display: flex;
  align-items: center;
  border: 2px solid var(--custom-area-calculator-gray-mid);
  border-radius: 10px;
  overflow: hidden;
  transition: border-color 0.2s;
}
.custom-area-calculator-field-row:focus-within { border-color: var(--custom-area-calculator-teal); }
.custom-area-calculator-field-row input {
  flex: 1;
  border: none;
  outline: none;
  padding: 12px 14px;
  font-size: 15px;
  font-weight: 600;
  color: var(--custom-area-calculator-navy);
  min-width: 0;
}
.custom-area-calculator-field-unit-select {
  background: var(--custom-area-calculator-gray);
  border: none;
  padding: 12px 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--custom-area-calculator-teal) !important;
  font-family: inherit;
  cursor: pointer;
}

.custom-area-calculator-wrap .custom-area-calculator-calc-btn {
  background: var(--custom-area-calculator-teal);
  color: white !important;
  border: none;
  padding: 14px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  width: 100%;
  transition: background 0.2s;
}
.custom-area-calculator-wrap .custom-area-calculator-calc-btn:hover { background: var(--custom-area-calculator-teal-dark); color: white !important; }
.custom-area-calculator-wrap .custom-area-calculator-reset-btn {
  background: white;
  color: var(--custom-area-calculator-navy) !important;
  border: 2px solid var(--custom-area-calculator-gray-mid);
  padding: 10px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  transition: all 0.2s;
}
.custom-area-calculator-wrap .custom-area-calculator-reset-btn:hover { border-color: var(--custom-area-calculator-teal); color: var(--custom-area-calculator-teal) !important; }

/* Drawing controls */
.custom-area-calculator-draw-controls {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.custom-area-calculator-draw-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.custom-area-calculator-undo-redo-row {
  display: flex;
  gap: 8px;
}
.custom-area-calculator-undo-redo-row .custom-area-calculator-reset-btn { flex: 1; }
.custom-area-calculator-draw-hint {
  font-size: 12px;
  color: var(--custom-area-calculator-text-muted);
  line-height: 1.5;
}
.custom-area-calculator-draw-edges {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  max-height: 280px;
  overflow-y: auto;
  align-content: start;
}
@media (max-width: 640px) {
  .custom-area-calculator-draw-edges { grid-template-columns: 1fr; }
}
.custom-area-calculator-edge-item {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 5px;
  width: 100%;
  text-align: left;
  font-family: inherit;
  font-size: 12.5px;
  color: var(--custom-area-calculator-text-muted) !important;
  background: var(--custom-area-calculator-gray);
  border: 1px solid transparent;
  border-radius: 6px;
  padding: 8px 10px;
  transition: border-color 0.15s, background 0.15s;
}
.custom-area-calculator-edge-item-label { font-weight: 700; color: var(--custom-area-calculator-text-muted) !important; }
.custom-area-calculator-edge-item-row {
  display: flex;
  align-items: center;
  gap: 6px;
}
button.custom-area-calculator-edge-item {
  cursor: pointer;
  flex-direction: row;
  align-items: center;
  flex-wrap: wrap;
}
button.custom-area-calculator-edge-item:hover { border-color: var(--custom-area-calculator-teal); background: white; }
.custom-area-calculator-edge-item-active {
  background: rgba(255, 209, 102, 0.25) !important;
  border-color: var(--custom-area-calculator-teal-light) !important;
}
.custom-area-calculator-edge-item strong { color: var(--custom-area-calculator-navy) !important; }
.custom-area-calculator-edge-input {
  flex: 1;
  min-width: 0;
  width: auto;
  border: 1px solid var(--custom-area-calculator-gray-mid);
  border-radius: 6px;
  padding: 6px 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--custom-area-calculator-navy) !important;
  font-family: inherit;
}
.custom-area-calculator-edge-item-unit {
  font-size: 12px;
  color: var(--custom-area-calculator-text-muted) !important;
  white-space: nowrap;
}
.custom-area-calculator-edge-delete {
  flex-shrink: 0;
  background: transparent;
  border: 1px solid var(--custom-area-calculator-gray-mid);
  border-radius: 6px;
  width: 22px;
  height: 22px;
  line-height: 1;
  font-size: 12px;
  color: var(--custom-area-calculator-text-muted) !important;
  cursor: pointer;
}
.custom-area-calculator-edge-delete:hover { border-color: var(--custom-area-calculator-red); color: var(--custom-area-calculator-red) !important; background: #fef2f2; }

/* Reference image (trace) controls */
.custom-area-calculator-image-controls {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.custom-area-calculator-image-controls input[type="file"] {
  flex: 1;
  min-width: 0;
  font-size: 12px;
  color: var(--custom-area-calculator-text-muted);
}
.custom-area-calculator-image-controls .custom-area-calculator-reset-btn {
  width: auto;
  padding: 8px 12px;
  font-size: 12.5px;
  white-space: nowrap;
}
.custom-area-calculator-image-opacity-row {
  display: flex;
  align-items: center;
  gap: 10px;
}
.custom-area-calculator-image-opacity-row label {
  font-size: 12px;
  color: var(--custom-area-calculator-text-muted);
  white-space: nowrap;
}
.custom-area-calculator-image-opacity-row input[type="range"] {
  flex: 1;
  accent-color: var(--custom-area-calculator-teal);
}

/* Result Side */
.custom-area-calculator-result-side { display: flex; flex-direction: column; gap: 16px; }

.custom-area-calculator-result-hero {
  background: linear-gradient(135deg, var(--custom-area-calculator-navy), var(--custom-area-calculator-navy-mid));
  color: white;
  border-radius: 16px;
  padding: 32px 28px;
  text-align: center;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
}
.custom-area-calculator-result-stats {
  display: flex;
  width: 100%;
  gap: 12px;
}
.custom-area-calculator-result-stat {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
}
.custom-area-calculator-result-stats .custom-area-calculator-result-stat:first-child {
  border-right: 1px solid rgba(255,255,255,0.15);
}
.custom-area-calculator-result-icon { font-size: 30px; }
.custom-area-calculator-result-label { font-size: 12px; opacity: 0.7; text-transform: uppercase; letter-spacing: 1px; }
.custom-area-calculator-result-val { font-size: 34px; font-weight: 800; color: var(--custom-area-calculator-teal-light); word-break: break-word; }
.custom-area-calculator-result-unit { font-size: 13px; opacity: 0.6; }
.custom-area-calculator-result-unit-select {
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.25);
  color: white;
  border-radius: 8px;
  padding: 6px 10px;
  font-size: 12.5px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
}
.custom-area-calculator-result-unit-select option { color: var(--custom-area-calculator-navy); }

/* Enclosed regions breakdown (one row per auto-detected region + a total) */
.custom-area-calculator-regions-panel {
  background: white;
  border: 1px solid var(--custom-area-calculator-gray-mid);
  border-radius: 14px;
  padding: 20px;
}
.custom-area-calculator-regions-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.custom-area-calculator-region-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  background: var(--custom-area-calculator-gray);
  border-radius: 10px;
  padding: 10px 14px;
  font-size: 13px;
}
.custom-area-calculator-region-item-name { font-weight: 600; color: var(--custom-area-calculator-navy); }
.custom-area-calculator-region-item-val { font-weight: 700; color: var(--custom-area-calculator-teal); white-space: nowrap; }
.custom-area-calculator-region-item-total {
  background: var(--custom-area-calculator-navy);
  color: white;
}
.custom-area-calculator-region-item-total .custom-area-calculator-region-item-name,
.custom-area-calculator-region-item-total .custom-area-calculator-region-item-val { color: white; }

/* Conversions */
.custom-area-calculator-conversions {
  background: white;
  border: 1px solid var(--custom-area-calculator-gray-mid);
  border-radius: 14px;
  padding: 20px;
}
.custom-area-calculator-section-title { font-size: 15px; font-weight: 700; color: var(--custom-area-calculator-navy); margin-bottom: 14px; }

.custom-area-calculator-conv-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.custom-area-calculator-conv-item {
  background: var(--custom-area-calculator-gray);
  border-radius: 10px;
  padding: 12px;
  text-align: center;
}
.custom-area-calculator-conv-val { font-size: 15px; font-weight: 700; color: var(--custom-area-calculator-teal); }
.custom-area-calculator-conv-label { font-size: 11px; color: var(--custom-area-calculator-text-muted); margin-top: 2px; }

/* Export */
.custom-area-calculator-export-bar { display: flex; flex-wrap: wrap; gap: 10px; }
.custom-area-calculator-wrap .custom-area-calculator-export-btn {
  flex: 1 1 auto;
  min-width: 90px;
  background: var(--custom-area-calculator-navy);
  color: white !important;
  border: none;
  padding: 12px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
.custom-area-calculator-wrap .custom-area-calculator-export-btn:hover { background: var(--custom-area-calculator-teal); color: white !important; }

/* History */
.custom-area-calculator-history-panel {
  background: white;
  border: 1px solid var(--custom-area-calculator-gray-mid);
  border-radius: 14px;
  padding: 20px;
}
.custom-area-calculator-history-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 14px;
}
.custom-area-calculator-history-head-actions { display: flex; gap: 8px; }
.custom-area-calculator-history-head-actions .custom-area-calculator-export-btn { flex: 0 0 auto; padding: 8px 12px; }
.custom-area-calculator-history-list { display: flex; flex-direction: column; gap: 10px; }
.custom-area-calculator-history-item {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--custom-area-calculator-gray);
  border: 1px solid var(--custom-area-calculator-gray-mid);
  border-radius: 10px;
  padding: 10px 14px;
  cursor: pointer;
  color: var(--custom-area-calculator-navy) !important;
  font-family: inherit;
  transition: border-color 0.2s, background 0.2s;
}
.custom-area-calculator-history-item:hover { border-color: var(--custom-area-calculator-teal); background: white; color: var(--custom-area-calculator-navy) !important; }
.custom-area-calculator-history-item-top {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  font-size: 12px;
  color: var(--custom-area-calculator-text-muted);
  margin-bottom: 4px;
}
.custom-area-calculator-history-item-summary { font-size: 12.5px; color: var(--custom-area-calculator-text-muted); margin-bottom: 3px; }
.custom-area-calculator-history-item-result { font-size: 14px; font-weight: 700; color: var(--custom-area-calculator-teal); }
.custom-area-calculator-history-empty {
  display: none;
  margin-top: 6px;
  font-size: 13px;
  color: var(--custom-area-calculator-text-muted);
  text-align: center;
}

/* ---------- Native print-to-PDF (see script's customAreaCalculatorPrintHtml()) ---------- */
.custom-area-calculator-print-area { display: none; }
@media print {
  body.custom-area-calculator-printing > *:not(.custom-area-calculator-print-area) {
    visibility: hidden !important;
  }
  body.custom-area-calculator-printing .custom-area-calculator-print-area {
    display: block !important;
    visibility: visible !important;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
  }
  body.custom-area-calculator-printing .custom-area-calculator-print-area * {
    visibility: visible !important;
  }
  .custom-area-calculator-print-area {
    font-family: 'Inter', Arial, sans-serif;
    color: #0F172A;
    padding: 24px;
  }
  .custom-area-calculator-print-area h1 {
    font-size: 22px;
    color: #0F172A;
    margin: 0 0 4px;
  }
  .custom-area-calculator-print-area .custom-area-calculator-print-meta {
    font-size: 11px;
    color: #64748B;
    margin-bottom: 18px;
  }
  .custom-area-calculator-print-area h2 {
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: #0D9488;
    border-bottom: 1px solid #E2E8F0;
    padding-bottom: 4px;
    margin: 18px 0 10px;
  }
  .custom-area-calculator-print-area .custom-area-calculator-print-highlight {
    background: #F0FDFA;
    border: 1px solid #0D9488;
    border-radius: 8px;
    padding: 14px 16px;
    margin-bottom: 16px;
    display: flex;
    gap: 28px;
  }
  .custom-area-calculator-print-area .custom-area-calculator-print-big {
    font-size: 20px;
    font-weight: 800;
    color: #0D9488;
  }
  .custom-area-calculator-print-area .custom-area-calculator-print-entry {
    page-break-inside: avoid;
    border-bottom: 1px dashed #E2E8F0;
    padding: 8px 0;
  }
  .custom-area-calculator-print-area .custom-area-calculator-print-drawing {
    display: block;
    max-width: 100%;
    height: auto;
    border: 1px solid #E2E8F0;
    border-radius: 8px;
    margin-bottom: 16px;
    page-break-inside: avoid;
  }
}

/* Responsive */
@media (max-width: 768px) {
  .custom-area-calculator-conv-grid { grid-template-columns: repeat(2, 1fr); }
}