/**
 * EB-002: Image Format Converter Styles
 * Refined, responsive, accessible workspace.
 */

/* Main Container */
.tool-main {
  max-width: var(--container-tool);
  margin: 0 auto;
  padding: var(--space-8) var(--space-4) var(--space-16);
  width: 100%;
}

/* Tool Hero */
.tool-hero {
  margin-bottom: var(--space-8);
  max-width: 640px;
}

.tool-title {
  font-size: 1.875rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin: 0 0 var(--space-2);
  line-height: 1.3;
}

.tool-description {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin: 0;
}

/* ==========================================================================
   Upload Dropzone
   ========================================================================== */
.dropzone {
  border: 2px dashed var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--space-10) var(--space-6);
  text-align: center;
  background-color: var(--bg-surface);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease), background-color var(--dur-fast) var(--ease);
  outline: none;
  margin-bottom: var(--space-6);
}

.dropzone:hover,
.dropzone:focus-visible,
.dropzone.drag-active {
  border-color: var(--color-primary);
  background-color: var(--color-primary-subtle);
}

.dropzone-icon {
  width: 44px;
  height: 44px;
  color: var(--text-muted);
  margin: 0 auto var(--space-3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.dropzone-text {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0 0 var(--space-1);
}

.dropzone-subtext {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0 0 var(--space-3);
}

.dropzone-formats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-1);
}

.format-pill {
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 2px 8px;
  background-color: var(--bg-subtle);
  color: var(--text-secondary);
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-subtle);
  letter-spacing: 0.04em;
}

/* ==========================================================================
   Global Controls Card
   ========================================================================== */
.controls-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-6);
}

.controls-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-4);
  align-items: end;
}

.control-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.control-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
}

.control-select,
.control-input {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.75rem;
  font-size: 0.875rem;
  font-family: inherit;
  outline: none;
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}

.control-select:focus,
.control-input:focus {
  border-color: var(--color-primary);
  box-shadow: var(--focus-ring);
}

.color-picker-wrap {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.color-input {
  width: 36px;
  height: 36px;
  padding: 0;
  border: 1px solid var(--border-default);
  border-radius: var(--radius-xs);
  cursor: pointer;
  background: none;
}

/* ==========================================================================
   Batch Action Bar
   ========================================================================== */
.batch-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.batch-stats {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.batch-buttons {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ==========================================================================
   Queue List & Cards
   ========================================================================== */
.queue-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.file-card {
  display: grid;
  grid-template-columns: 56px 1fr auto auto;
  align-items: center;
  gap: var(--space-4);
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  transition: border-color var(--dur-fast) var(--ease);
  box-shadow: var(--shadow-sm);
}

.file-card:hover {
  border-color: var(--border-hover);
}

.card-preview {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-xs);
  object-fit: contain;
  background-color: #f1f2f4;
  background-image: 
    linear-gradient(45deg, #e4e5e8 25%, transparent 25%), 
    linear-gradient(-45deg, #e4e5e8 25%, transparent 25%), 
    linear-gradient(45deg, transparent 75%, #e4e5e8 75%), 
    linear-gradient(-45deg, transparent 75%, #e4e5e8 75%);
  background-size: 12px 12px;
  background-position: 0 0, 0 6px, 6px -6px, -6px 0px;
}

[data-theme="dark"] .card-preview {
  background-color: #121417;
  background-image: 
    linear-gradient(45deg, #1c1f24 25%, transparent 25%), 
    linear-gradient(-45deg, #1c1f24 25%, transparent 25%), 
    linear-gradient(45deg, transparent 75%, #1c1f24 75%), 
    linear-gradient(-45deg, transparent 75%, #1c1f24 75%);
}

.card-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 0;
}

.card-filename {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.card-meta {
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.badge {
  display: inline-block;
  padding: 1px 6px;
  font-size: 0.6875rem;
  font-weight: 600;
  text-transform: uppercase;
  border-radius: var(--radius-xs);
  background-color: var(--bg-subtle);
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
}

.badge-success {
  background-color: var(--color-success-subtle);
  color: var(--color-success);
  border-color: transparent;
}

.card-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-section {
  margin-top: var(--space-16);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-default);
}

.faq-title {
  font-size: 1.375rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin: 0 0 var(--space-2);
}

.faq-subtitle {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin: 0 0 var(--space-6);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  max-width: 820px;
}

.faq-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-default);
  border-radius: var(--radius-sm);
  padding: var(--space-4);
  cursor: pointer;
  transition: border-color var(--dur-fast) var(--ease);
}

.faq-item:hover {
  border-color: var(--border-hover);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text-primary);
  list-style: none;
  user-select: none;
}

.faq-question::-webkit-details-marker {
  display: none;
}

.faq-chevron {
  width: 16px;
  height: 16px;
  color: var(--text-muted);
  transition: transform var(--dur-normal) var(--ease);
  flex-shrink: 0;
  margin-left: var(--space-2);
}

details[open] .faq-chevron {
  transform: rotate(180deg);
}

.faq-answer {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: var(--space-3) 0 0;
}

/* Mobile Responsiveness */
@media (max-width: 640px) {
  .file-card {
    grid-template-columns: 44px 1fr;
    grid-template-rows: auto auto;
    gap: var(--space-2);
  }

  .card-preview {
    width: 44px;
    height: 44px;
  }

  .card-actions {
    grid-column: 1 / -1;
    justify-content: space-between;
    margin-top: var(--space-2);
  }
}