/* ============================================================
   CUSTOM BOX GENERATOR — Dedicated Stylesheet
   Professional packaging design tool interface
   ============================================================ */

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

/* ── Page-specific Variables ── */
.boxgen-app {
  --bg-app: #f0f2f5;
  --bg-panel: #ffffff;
  --bg-canvas: #fafbfc;
  --border-panel: #e5e7eb;
  --text-dark: #1f2937;
  --text-mid: #6b7280;
  --text-light: #9ca3af;
  --blue-ui: #2563eb;
  --blue-light: #dbeafe;
  --blue-glow: rgba(37, 99, 235, 0.12);
  --green-glue: #22c55e;
  --green-light: rgba(34, 197, 94, 0.12);
  --red-fold: #ef4444;
  --red-light: rgba(239, 68, 68, 0.08);
  --cardboard: #d4a853;
  --cardboard-light: #e8c97a;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.04);
  --shadow-hover: 0 4px 24px rgba(0,0,0,0.08);
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --panel-width-left: 300px;
  --panel-width-right: 320px;
}

/* ── App Container ── */
.boxgen-app {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg-app);
  min-height: 100vh;
  padding-top: var(--nav-height, 72px);
}

.boxgen-layout {
  display: grid;
  grid-template-columns: var(--panel-width-left) 1fr var(--panel-width-right);
  height: calc(100vh - var(--nav-height, 72px));
  overflow: hidden;
}

/* ── Panels (Left & Right) ── */
.boxgen-panel {
  background: var(--bg-panel);
  border-right: 1px solid var(--border-panel);
  overflow-y: auto;
  padding: 0;
  scrollbar-width: thin;
  scrollbar-color: #d1d5db transparent;
}

.boxgen-panel::-webkit-scrollbar {
  width: 4px;
}

.boxgen-panel::-webkit-scrollbar-thumb {
  background: #d1d5db;
  border-radius: 99px;
}

.boxgen-panel-right {
  border-right: none;
  border-left: 1px solid var(--border-panel);
}

/* Panel Section */
.panel-section {
  padding: 20px 20px 12px;
  border-bottom: 1px solid var(--border-panel);
}

.panel-section:last-child {
  border-bottom: none;
}

.panel-section-title {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  margin-bottom: 14px;
}

/* ── Unit Switch ── */
.unit-switch {
  display: flex;
  background: #f3f4f6;
  border-radius: var(--radius-sm);
  padding: 3px;
  gap: 2px;
}

.unit-switch button {
  flex: 1;
  padding: 6px 0;
  font-size: 0.8rem;
  font-weight: 600;
  border: none;
  border-radius: 6px;
  background: transparent;
  color: var(--text-mid);
  cursor: pointer;
  transition: all 0.2s var(--ease);
  font-family: inherit;
}

.unit-switch button.active {
  background: var(--blue-ui);
  color: #fff;
  box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
}

/* ── Input Fields ── */
.dim-inputs {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.dim-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.dim-row label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-mid);
  width: 56px;
  flex-shrink: 0;
}

.dim-row input {
  flex: 1;
  padding: 8px 10px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-dark);
  border: 1.5px solid var(--border-panel);
  border-radius: var(--radius-sm);
  background: #fff;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
  font-family: inherit;
  outline: none;
}

.dim-row input:focus {
  border-color: var(--blue-ui);
  box-shadow: 0 0 0 3px var(--blue-glow);
}

.dim-row .unit-label {
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-light);
  width: 28px;
  flex-shrink: 0;
}

/* ── Thickness Slider ── */
.thickness-control {
  display: flex;
  align-items: center;
  gap: 10px;
}

.thickness-control .minus-btn,
.thickness-control .plus-btn {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1.5px solid var(--border-panel);
  background: #fff;
  font-size: 1rem;
  color: var(--text-dark);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s var(--ease);
  font-family: inherit;
  flex-shrink: 0;
}

.thickness-control .minus-btn:hover,
.thickness-control .plus-btn:hover {
  border-color: var(--blue-ui);
  color: var(--blue-ui);
}

.thickness-val {
  flex: 1;
  text-align: center;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-dark);
}

/* ── Material Dropdown ── */
.mat-select {
  width: 100%;
  padding: 9px 12px;
  font-size: 0.85rem;
  border: 1.5px solid var(--border-panel);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text-dark);
  cursor: pointer;
  font-family: inherit;
  outline: none;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239ca3af' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 32px;
  transition: border-color 0.2s var(--ease);
}

.mat-select:focus {
  border-color: var(--blue-ui);
  box-shadow: 0 0 0 3px var(--blue-glow);
}

/* ── Dimension Mode Buttons ── */
.dim-mode-group {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.dim-mode-btn {
  padding: 7px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  border: 1.5px solid var(--border-panel);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--text-mid);
  cursor: pointer;
  transition: all 0.2s var(--ease);
  font-family: inherit;
}

.dim-mode-btn.active {
  border-color: var(--blue-ui);
  background: var(--blue-light);
  color: var(--blue-ui);
}

.dim-mode-btn:hover:not(.active) {
  border-color: #cbd5e1;
  background: #f9fafb;
}

/* ── Canvas Area (Center) ── */
.boxgen-canvas {
  background: var(--bg-canvas);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* Dieline Legend */
.dieline-legend {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 12px 20px;
  background: #fff;
  border-bottom: 1px solid var(--border-panel);
  flex-shrink: 0;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--text-mid);
}

.legend-swatch {
  width: 22px;
  height: 3px;
  border-radius: 2px;
}

.legend-swatch.cut { background: var(--blue-ui); }
.legend-swatch.fold { background: var(--red-fold); border-top: 2px dashed var(--red-fold); height: 0; }
.legend-swatch.glue { background: var(--green-glue); opacity: 0.6; height: 8px; width: 16px; border-radius: 2px; }

/* Dimension Info Bar */
.dim-info-bar {
  display: flex;
  gap: 24px;
  padding: 8px 20px;
  background: #fff;
  border-bottom: 1px solid var(--border-panel);
  flex-shrink: 0;
}

.dim-info {
  font-size: 0.72rem;
  color: var(--text-mid);
}

.dim-info strong {
  color: var(--text-dark);
  font-weight: 700;
}

/* SVG Container */
.dieline-container {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  position: relative;
}

.dieline-container svg {
  max-width: 100%;
  max-height: 100%;
  filter: drop-shadow(0 2px 8px rgba(0,0,0,0.04));
}

/* Watermark */
.dieline-watermark {
  position: absolute;
  font-size: 2.5rem;
  font-weight: 800;
  color: rgba(0,0,0,0.03);
  letter-spacing: 8px;
  pointer-events: none;
  text-transform: uppercase;
  white-space: nowrap;
}

/* ── 3D Preview (Right Panel Top) ── */
.preview-3d-wrapper {
  background: linear-gradient(145deg, #f8f9fa, #eef1f5);
  border-radius: var(--radius);
  margin: 16px;
  height: 280px;
  position: relative;
  overflow: hidden;
  border: 1px solid var(--border-panel);
}

.preview-3d-wrapper canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
  border-radius: var(--radius);
}

.preview-3d-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-light);
  background: rgba(255,255,255,0.85);
  padding: 3px 8px;
  border-radius: 4px;
  letter-spacing: 0.5px;
  z-index: 2;
}

/* Open/Close Slider */
.flap-slider-section {
  padding: 12px 20px 16px;
}

.flap-slider-header {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-mid);
  margin-bottom: 8px;
}

.boxgen-range {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 5px;
  background: linear-gradient(90deg, var(--blue-ui), #93c5fd);
  border-radius: 999px;
  outline: none;
  cursor: pointer;
}

.boxgen-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  background: #fff;
  border: 2px solid var(--blue-ui);
  border-radius: 50%;
  box-shadow: 0 1px 4px rgba(0,0,0,0.12);
  cursor: grab;
  transition: transform 0.15s var(--ease);
}

.boxgen-range::-webkit-slider-thumb:hover {
  transform: scale(1.15);
}

.boxgen-range::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: #fff;
  border: 2px solid var(--blue-ui);
  border-radius: 50%;
  box-shadow: 0 1px 4px rgba(0,0,0,0.12);
  cursor: grab;
}

/* ── Export Section ── */
.export-section {
  padding: 16px 20px;
}

.export-title {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-light);
  text-transform: uppercase;
  letter-spacing: 1.2px;
  margin-bottom: 12px;
}

.export-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.export-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 12px;
  border: 1.5px solid var(--border-panel);
  border-radius: var(--radius-sm);
  background: #fff;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--text-dark);
  cursor: pointer;
  transition: all 0.2s var(--ease);
  font-family: inherit;
}

.export-btn:hover {
  border-color: var(--blue-ui);
  background: var(--blue-light);
  color: var(--blue-ui);
  transform: translateY(-1px);
  box-shadow: var(--shadow-card);
}

.export-btn .export-icon {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.65rem;
  font-weight: 800;
  flex-shrink: 0;
}

.export-icon.ai { background: #ff6b00; color: #fff; }
.export-icon.pdf { background: #ef4444; color: #fff; }
.export-icon.dxf { background: #8b5cf6; color: #fff; }
.export-icon.mockup { background: var(--cardboard); color: #fff; }

.export-note {
  margin-top: 12px;
  font-size: 0.72rem;
  color: var(--text-light);
  line-height: 1.5;
}

/* ── Responsive ── */
@media (max-width: 1200px) {
  .boxgen-layout {
    grid-template-columns: 260px 1fr 280px;
  }
}

@media (max-width: 960px) {
  .boxgen-layout {
    grid-template-columns: 1fr;
    height: auto;
    overflow: visible;
  }

  .boxgen-panel,
  .boxgen-panel-right {
    border: none;
    border-bottom: 1px solid var(--border-panel);
  }

  .boxgen-canvas {
    min-height: 60vh;
  }

  .preview-3d-wrapper {
    height: 240px;
  }
}

@media (max-width: 600px) {
  .panel-section {
    padding: 16px;
  }

  .dieline-legend {
    flex-wrap: wrap;
    gap: 10px;
  }

  .dim-info-bar {
    flex-wrap: wrap;
    gap: 10px;
  }

  .export-grid {
    grid-template-columns: 1fr;
  }

  .preview-3d-wrapper {
    height: 200px;
    margin: 10px;
  }
}