/*
 * cover.css
 * ---------
 * Cover Image tab: three-column layout, template gallery,
 * SVG preview, content editor, typography controls.
 */

/* ── Three-Column Layout ── */
.cover-layout {
  display: flex;
  flex: 1;
  min-height: 0;
  overflow: hidden;
  background: var(--color-surface-base);
}

.cover-sidebar-left {
  width: 280px;
  flex-shrink: 0;
  background: var(--color-surface);
  border-right: 1px solid var(--color-border-default);
  display: flex;
  flex-direction: column;
}

.cover-center {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-width: 300px;
  overflow: hidden;
}

.cover-sidebar-right {
  width: 320px;
  flex-shrink: 0;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border-default);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

/* ── Template Gallery (Left Sidebar) ── */
.cover-sidebar-header {
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--color-border-default);
  flex-shrink: 0;
}

.cover-sidebar-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.cover-template-scroll {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-4) var(--space-4);
}

.cover-template-scroll::-webkit-scrollbar { width: 4px; }
.cover-template-scroll::-webkit-scrollbar-thumb { background: var(--color-border-default); border-radius: 2px; }

.cover-category-label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--space-4) 0 var(--space-2);
}

.cover-category-label:first-child { padding-top: 0; }

.cover-template-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.cover-template-card {
  aspect-ratio: 5 / 2;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: 1px solid var(--color-border-default);
  transition: border-color var(--motion-instant), transform var(--motion-instant), box-shadow var(--motion-instant);
  position: relative;
  background: var(--color-surface-raised);
  overflow: hidden;
  box-shadow: var(--shadow-1);
}

.cover-template-card:hover {
  border-color: var(--color-border-strong);
  box-shadow: var(--shadow-2);
  transform: translateY(-1px);
}

.cover-template-card.active {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent-light), var(--shadow-2);
}

.cover-template-card.active:hover {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 1px var(--color-accent);
  transform: translateY(-1px);
}

.cover-template-thumb {
  width: 100%;
  height: 100%;
}

.cover-template-thumb svg {
  width: 100%;
  height: 100%;
  display: block;
}

.cover-template-name {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 3px 8px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--color-text-primary);
  font-size: 11px;
  font-weight: 600;
  text-align: left;
  line-height: 1.35;
  z-index: 2;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cover-template-info {
  position: absolute;
  inset: 0;
  bottom: 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  padding: 6px 8px;
  background: rgba(255, 255, 255, 0.94);
  opacity: 0;
  transition: opacity var(--motion-instant);
  pointer-events: none;
  z-index: 1;
}

.cover-template-card:hover .cover-template-info {
  opacity: 1;
}

.cover-template-scenario {
  font-size: 12px;
  color: var(--color-text-primary);
  text-align: center;
  line-height: 1.4;
  font-weight: 600;
  max-width: 100%;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.cover-template-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  justify-content: center;
  max-width: 100%;
  overflow: hidden;
}

.cover-template-tag {
  font-size: 10px;
  padding: 2px 6px;
  border-radius: 3px;
  background: var(--color-surface-base);
  color: var(--color-text-secondary);
  line-height: 1.5;
  white-space: nowrap;
  border: 1px solid var(--color-border-default);
}

/* Touch devices: show info on active card instead of hover */
@media (hover: none) {
  .cover-template-card.active .cover-template-info {
    opacity: 1;
  }
}

/* ── Cover Center Area ── */
.cover-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-6);
  border-bottom: 1px solid var(--color-border-default);
  background: var(--color-surface);
  flex-shrink: 0;
  gap: var(--space-3);
}

.cover-toolbar-left {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.cover-toolbar-right {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.cover-tool-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  background: transparent;
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xs);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--motion-instant);
}

.cover-tool-btn svg { width: 16px; height: 16px; }

.cover-tool-btn:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: var(--color-accent-light);
}

.cover-tool-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.cover-tool-btn:disabled:hover {
  color: var(--color-text-secondary);
  border-color: var(--color-border-default);
  background: transparent;
}

.cover-tool-separator {
  width: 1px;
  height: 20px;
  background: var(--color-border-default);
}

.cover-layer-btn {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-1) var(--space-3);
  background: var(--color-surface-raised);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xs);
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--motion-instant);
}

.cover-layer-btn svg { width: 14px; height: 14px; }

.cover-layer-btn:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.cover-opacity-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.cover-opacity-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  white-space: nowrap;
}

.cover-opacity-slider {
  width: 80px;
  accent-color: var(--color-accent);
}

.cover-opacity-value {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
  min-width: 30px;
  text-align: right;
}

.cover-export-btn {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  background: var(--color-accent);
  color: white;
  border: none;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  font-family: var(--font-sans);
  cursor: pointer;
  transition: all var(--motion-instant);
  box-shadow: var(--shadow-jade);
}

.cover-export-btn svg { width: 14px; height: 14px; }

.cover-export-btn:hover {
  opacity: 0.8;
  transform: translateY(-1px);
}

/* ── Cover Preview Area ── */
.cover-preview-area {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
  background:
    linear-gradient(45deg, rgba(0, 0, 0, 0.035) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(0, 0, 0, 0.035) 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, rgba(0, 0, 0, 0.035) 75%),
    linear-gradient(-45deg, transparent 75%, rgba(0, 0, 0, 0.035) 75%),
    var(--color-surface-base);
  background-size: 24px 24px;
  background-position: 0 0, 0 12px, 12px -12px, -12px 0;
  overflow: auto;
  min-height: 0;
}

.cover-preview-frame {
  width: 100%;
  max-width: 720px;
  aspect-ratio: 5 / 2;
  border-radius: var(--radius-sm);
  overflow: hidden;
  box-shadow: var(--shadow-4);
  border: 1px solid var(--color-border-strong);
  background: var(--color-surface);
}

.cover-preview-frame svg {
  width: 100%;
  height: 100%;
  display: block;
}

/* ── Cover Bottom Area (reserved) ── */
.cover-bottom-area {
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--color-border-default);
  background: var(--color-surface);
  flex-shrink: 0;
  min-height: 40px;
}

/* ── Content Editor (Right Sidebar) ── */
.cover-editor-scroll {
  flex: 1;
  overflow-y: auto;
  padding: var(--space-5) var(--space-6);
}

.cover-editor-scroll::-webkit-scrollbar { width: 4px; }
.cover-editor-scroll::-webkit-scrollbar-thumb { background: var(--color-border-default); border-radius: 2px; }

.cover-editor-section {
  margin-bottom: var(--space-6);
}

.cover-editor-section + .cover-editor-section {
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border-light);
}

.cover-field-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.cover-field-label {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.cover-field-input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xs);
  background: var(--color-surface);
  color: var(--color-text-primary);
  font-size: var(--font-size-md);
  font-family: var(--font-sans);
  transition: border-color var(--motion-instant), box-shadow var(--motion-instant);
}

.cover-field-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-light);
}

.cover-field-input::placeholder {
  color: var(--color-text-tertiary);
}

textarea.cover-field-input {
  min-height: 60px;
  resize: vertical;
  line-height: 1.5;
}

.cover-field-input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background: var(--color-surface-raised);
}

/* ── Typography Controls ── */
.cover-typo-section-title {
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-4);
}

.cover-typo-row {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.cover-typo-row-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.cover-typo-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  font-weight: 500;
}

.cover-typo-value {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
}

.cover-typo-slider-row {
  display: grid;
  grid-template-columns: 1fr 60px;
  gap: var(--space-3);
  align-items: center;
}

.cover-typo-slider-row input[type="range"] {
  width: 100%;
  accent-color: var(--color-accent);
}

.cover-typo-number-input {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xs);
  background: var(--color-surface);
  color: var(--color-text-primary);
  font-size: var(--font-size-sm);
  font-family: var(--font-mono);
  text-align: center;
}

.cover-typo-number-input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px var(--color-accent-light);
}

.cover-font-select {
  width: 100%;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-xs);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  font-family: var(--font-body);
  cursor: pointer;
}

.cover-font-select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px var(--color-accent-light);
}

/* Align buttons */
.cover-align-group {
  display: flex;
  gap: var(--space-1);
  background: var(--color-surface-raised);
  border-radius: var(--radius-xs);
  padding: 2px;
  border: 1px solid var(--color-border-default);
}

.cover-align-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: var(--space-2);
  background: transparent;
  border: none;
  border-radius: var(--radius-xs);
  color: var(--color-text-tertiary);
  cursor: pointer;
  transition: all var(--motion-instant);
}

.cover-align-btn svg { width: 16px; height: 16px; }

.cover-align-btn:hover {
  color: var(--color-text-primary);
}

.cover-align-btn.active {
  background: var(--color-surface);
  color: var(--color-accent);
  box-shadow: var(--shadow-1);
}

/* ── Illustration Picker ── */
.cover-illust-categories {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1);
  margin-bottom: var(--space-3);
}

.cover-illust-cat-btn {
  padding: 4px 10px;
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text-secondary);
  font-size: 12px;
  cursor: pointer;
  transition: all var(--motion-instant);
}

.cover-illust-cat-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.cover-illust-cat-btn.active {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

.cover-illust-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
  margin-bottom: var(--space-3);
  max-height: 320px;
  overflow-y: auto;
}

.cover-illust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: var(--space-2);
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  background: var(--color-surface-elevated);
  cursor: pointer;
  transition: all var(--motion-instant);
}

.cover-illust-item:hover {
  border-color: var(--color-accent);
}

.cover-illust-item.active {
  border-color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 8%, var(--color-surface));
}

.cover-illust-thumb {
  width: 100%;
  height: 56px;
  object-fit: contain;
  border-radius: var(--radius-xs);
}

.cover-illust-name {
  font-size: 10px;
  color: var(--color-text-secondary);
  text-align: center;
  line-height: 1.2;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 100%;
}

.cover-illust-empty {
  grid-column: 1 / -1;
  padding: var(--space-4) var(--space-2);
  text-align: center;
  color: var(--color-text-tertiary);
  font-size: 12px;
  line-height: 1.5;
}

.cover-illust-clear-btn {
  width: 100%;
  padding: var(--space-2);
  border: 1px dashed var(--color-border-default);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-text-tertiary);
  font-size: 12px;
  cursor: pointer;
  margin-bottom: var(--space-3);
  transition: all var(--motion-instant);
}

.cover-illust-clear-btn:hover {
  border-color: var(--color-error, #ef4444);
  color: var(--color-error, #ef4444);
}

.cover-illust-color-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.cover-color-picker {
  width: 32px;
  height: 32px;
  border: 2px solid var(--color-border-default);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0;
  background: none;
}

.cover-color-picker::-webkit-color-swatch-wrapper {
  padding: 2px;
}

.cover-color-picker::-webkit-color-swatch {
  border: none;
  border-radius: 2px;
}

.cover-color-presets {
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.cover-color-preset {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--motion-instant);
}

.cover-color-preset:hover {
  transform: scale(1.2);
}

.cover-color-preset.active {
  border-color: var(--color-text-primary);
  box-shadow: 0 0 0 2px var(--color-surface);
}

.cover-illust-markets {
  margin-top: var(--space-3);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border-default);
}

.cover-illust-markets-title {
  font-size: 12px;
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2);
}

.cover-illust-market-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.cover-illust-market-link {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all var(--motion-instant);
}

.cover-illust-market-link:hover {
  border-color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 5%, var(--color-surface));
}

.cover-illust-market-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--color-text-primary);
}

.cover-illust-market-desc {
  font-size: 11px;
  color: var(--color-text-tertiary);
}

/* ── Responsive ── */
@media (max-width: 1024px) {
  .cover-sidebar-left { width: 240px; }
  .cover-sidebar-right { width: 280px; }
}

@media (max-width: 768px) {
  .cover-layout {
    flex-direction: column;
  }

  .cover-sidebar-left {
    width: 100%;
    max-height: 200px;
    border-right: none;
    border-bottom: 1px solid var(--color-border-default);
  }

  .cover-template-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .cover-center {
    min-height: 300px;
  }

  .cover-sidebar-right {
    width: 100%;
    border-left: none;
    border-top: 1px solid var(--color-border-default);
    max-height: 50vh;
  }

  .cover-preview-frame {
    max-width: 100%;
  }
}