/* ============================================================
   Drawing Grid Maker — Page Styles
   ============================================================ */

.tool-layout {
  display: flex;
  min-height: calc(100vh - var(--header-height));
  margin-top: var(--header-height);
}

/* --- Canvas Area --- */
.canvas-area {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-6);
  margin-right: var(--sidebar-width);
  position: relative;
  background: var(--color-bg-primary);
  min-height: calc(100vh - var(--header-height));
}

.canvas-container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 900px;
  flex: 1;
}

.canvas-wrapper {
  position: relative;
  display: inline-block;
  box-shadow: var(--shadow-xl);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #000;
}

.canvas-wrapper canvas {
  display: block;
  max-width: 100%;
  max-height: calc(100vh - var(--header-height) - 120px);
  object-fit: contain;
}

/* --- Canvas Toolbar --- */
.canvas-toolbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
  padding: var(--space-3);
  background: var(--color-bg-card);
  backdrop-filter: blur(12px);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  margin-top: var(--space-4);
}
.canvas-toolbar .btn {
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
}
.canvas-toolbar .divider {
  width: 1px;
  height: 20px;
  background: var(--color-border);
}
.canvas-toolbar .zoom-display {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-secondary);
  min-width: 40px;
  text-align: center;
  font-variant-numeric: tabular-nums;
}

/* --- Upload State --- */
.upload-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 600px;
  margin: auto;
}
.upload-state .upload-zone {
  width: 100%;
}
.canvas-state {
  display: none;
  width: 100%;
  flex-direction: column;
  align-items: center;
}
.canvas-state.active {
  display: flex;
}

/* --- Sidebar Sections --- */
.sidebar-section {
  padding: var(--space-4);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.sidebar-section__title {
  font-size: var(--font-size-sm);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.sidebar-section__title svg {
  width: 16px;
  height: 16px;
  color: var(--color-accent-blue-light);
}

/* --- Control Row --- */
.control-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.control-row input[type="range"] {
  flex: 1;
}

/* --- Grid Type Selector --- */
.grid-type-selector {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
}
.grid-type-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--font-size-xs);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  cursor: pointer;
  background: transparent;
}
.grid-type-btn:hover {
  border-color: var(--color-border-hover);
  background: var(--color-surface);
}
.grid-type-btn.active {
  border-color: var(--color-accent-blue);
  background: var(--color-accent-blue-glow);
  color: var(--color-accent-blue-light);
}
.grid-type-btn svg {
  width: 24px;
  height: 24px;
}

/* --- Checkbox Controls --- */
.checkbox-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.checkbox-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}
.checkbox-item__label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* --- Export Buttons --- */
.export-buttons {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2);
}
.export-buttons .btn {
  justify-content: center;
}

/* --- Image Info Bar --- */
.image-info {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}
.image-info__item {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}
.image-info__value {
  color: var(--color-text-secondary);
  font-weight: 600;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
  .canvas-area {
    margin-right: 0;
    margin-bottom: 60px;
    padding: var(--space-4);
  }
  .canvas-wrapper canvas {
    max-height: calc(100vh - var(--header-height) - 200px);
  }
}