/* =============================================
  components.css — PixieConverter UI Components
  ============================================= */

/* ─── Buttons ────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 20px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: all var(--transition-base);
  white-space: nowrap;
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  color: #fff;
  box-shadow: 0 4px 15px rgba(108, 99, 255, 0.3);
  border-color: rgba(255,255,255,0.1);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 25px rgba(108, 99, 255, 0.45);
}

.btn-primary:active { transform: translateY(0); }

.btn-secondary {
  background: var(--color-surface-2);
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-surface-3);
  border-color: var(--color-border-light);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--color-surface-2);
  color: var(--color-text-primary);
}

.btn-success {
  background: linear-gradient(135deg, #16a34a, #15803d);
  color: #fff;
  box-shadow: 0 4px 15px rgba(34, 197, 94, 0.25);
}

.btn-success:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 22px rgba(34, 197, 94, 0.4);
}

.btn-danger {
  background: var(--color-surface-2);
  color: var(--color-error);
  border-color: rgba(239, 68, 68, 0.25);
}

.btn-danger:hover {
  background: var(--color-error-bg);
  border-color: rgba(239, 68, 68, 0.5);
}

.btn-sm { padding: 7px 14px; font-size: 0.8rem; border-radius: var(--radius-sm); }
.btn-lg { padding: 14px 28px; font-size: 1rem; border-radius: var(--radius-lg); }
.btn-icon { padding: 8px; border-radius: var(--radius-sm); }

/* ─── Format Pill Buttons ────────────────────── */
.format-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  cursor: pointer;
  border: 1.5px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-muted);
  transition: all var(--transition-base);
}

.format-pill:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-light);
  background: rgba(108, 99, 255, 0.08);
  transform: translateY(-1px);
}

.format-pill.active {
  background: linear-gradient(135deg, rgba(108, 99, 255, 0.2), rgba(0, 212, 255, 0.1));
  border-color: var(--color-accent);
  color: var(--color-accent-light);
  box-shadow: 0 0 16px var(--color-accent-glow), inset 0 0 12px rgba(108,99,255,0.05);
}

.format-pill .pill-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: currentColor;
  opacity: 0.6;
}

.format-pill.active .pill-dot { opacity: 1; }

/* ─── Upload Zone ────────────────────────────── */
.upload-zone {
  position: relative;
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-16) var(--space-8);
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-base);
  background: var(--color-surface);
  overflow: hidden;
}

.upload-zone::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: radial-gradient(ellipse 60% 40% at 50% 50%, rgba(108,99,255,0.04), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.upload-zone:hover,
.upload-zone.drag-over {
  border-color: var(--color-accent);
  background: rgba(108, 99, 255, 0.05);
}

.upload-zone:hover::before,
.upload-zone.drag-over::before { opacity: 1; }

.upload-zone.drag-over {
  border-color: var(--color-accent-2);
  box-shadow: 0 0 40px var(--color-accent-2-glow), inset 0 0 60px rgba(0,212,255,0.04);
}

.upload-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
  width: 100%;
  height: 100%;
  z-index: 1;
}

.upload-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto var(--space-5);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--color-surface-2), var(--color-surface-3));
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.upload-zone:hover .upload-icon,
.upload-zone.drag-over .upload-icon {
  transform: scale(1.08) translateY(-2px);
  box-shadow: 0 8px 24px rgba(108,99,255,0.2);
}

.upload-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.upload-subtitle {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-5);
}

.upload-subtitle span {
  color: var(--color-accent-light);
  font-weight: 600;
}

.upload-info {
  display: inline-flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  font-size: 0.78rem;
  color: var(--color-text-dim);
}

.upload-info-separator {
  width: 1px;
  height: 12px;
  background: var(--color-border);
}

/* ─── File Card ──────────────────────────────── */
.file-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.file-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  animation: card-enter 0.35s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

.file-card:hover {
  border-color: var(--color-border-light);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.file-card.success { border-color: rgba(34, 197, 94, 0.3); }
.file-card.error   { border-color: rgba(239, 68, 68, 0.3); }
.file-card.converting { border-color: rgba(108, 99, 255, 0.3); }

.file-card-thumb {
  width: 100%;
  height: 160px;
  background: var(--color-surface-2);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.file-card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: var(--space-2);
}

.file-card-thumb-placeholder {
  font-size: 3rem;
  opacity: 0.3;
}

.file-card-thumb-before-after {
  position: absolute;
  bottom: var(--space-2);
  right: var(--space-2);
  display: flex;
  gap: var(--space-1);
}

.thumb-toggle-btn {
  padding: 3px 8px;
  border-radius: var(--radius-full);
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 1px solid rgba(255,255,255,0.15);
  background: rgba(0,0,0,0.6);
  color: rgba(255,255,255,0.7);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.thumb-toggle-btn.active,
.thumb-toggle-btn:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.file-card-body {
  padding: var(--space-4);
}

.file-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-3);
  gap: var(--space-2);
}

.file-card-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 180px;
}

.file-card-meta {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-top: 2px;
}

.file-card-remove {
  padding: 4px;
  border-radius: var(--radius-sm);
  color: var(--color-text-dim);
  transition: all var(--transition-fast);
  flex-shrink: 0;
  cursor: pointer;
  background: none;
  border: none;
  line-height: 1;
}

.file-card-remove:hover {
  color: var(--color-error);
  background: var(--color-error-bg);
}

.file-card-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-3) 0;
}

/* File Card Progress */
.file-progress {
  margin-bottom: var(--space-3);
}

.file-progress-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-2);
}

.file-progress-bar-track {
  height: 4px;
  background: var(--color-surface-3);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.file-progress-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-2));
  transition: width 0.4s ease;
  position: relative;
  overflow: hidden;
}

.file-progress-bar-fill::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: shimmer 1.5s linear infinite;
}

/* File Card Status */
.file-card-status {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.8rem;
  font-weight: 500;
  margin-bottom: var(--space-3);
}

.file-card-status.status-idle    { color: var(--color-text-dim); }
.file-card-status.status-converting { color: var(--color-accent-light); }
.file-card-status.status-success { color: var(--color-success); }
.file-card-status.status-error   { color: var(--color-error); }

.file-card-savings {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
  background: var(--color-success-bg);
  color: var(--color-success);
  border: 1px solid rgba(34, 197, 94, 0.2);
}

.file-card-savings.worse {
  background: var(--color-warning-bg);
  color: var(--color-warning);
  border-color: rgba(245, 158, 11, 0.2);
}

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

.file-card-actions .btn {
  flex: 1;
  font-size: 0.78rem;
  padding: 7px 12px;
}

/* ─── Settings Panel ─────────────────────────── */
.settings-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-5);
  overflow: hidden;
  transition: all var(--transition-base);
}

.settings-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  cursor: pointer;
  user-select: none;
  transition: background var(--transition-fast);
}

.settings-header:hover { background: var(--color-surface-2); }

.settings-header-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-primary);
}

.settings-chevron {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  transition: transform var(--transition-base);
}

.settings-panel.open .settings-chevron {
  transform: rotate(180deg);
}

.settings-body {
  padding: 0 var(--space-5);
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow), padding var(--transition-slow);
}

.settings-panel.open .settings-body {
  max-height: 600px;
  padding: 0 var(--space-5) var(--space-5);
}

.settings-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

.settings-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.settings-field.full-width { grid-column: 1 / -1; }

.settings-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-secondary);
}

.settings-sublabel {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  margin-top: 1px;
}

/* Slider */
.slider-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.quality-slider {
  -webkit-appearance: none;
  appearance: none;
  flex: 1;
  height: 4px;
  background: var(--color-surface-3);
  border-radius: var(--radius-full);
  outline: none;
  cursor: pointer;
}

.quality-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 8px var(--color-accent-glow);
  cursor: pointer;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  border: 2px solid rgba(255,255,255,0.2);
}

.quality-slider::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 14px var(--color-accent-glow);
}

.slider-value {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--color-accent-light);
  min-width: 36px;
  text-align: right;
}

/* Toggle Switch */
.toggle-wrapper {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.toggle {
  position: relative;
  width: 40px;
  height: 22px;
  flex-shrink: 0;
}

.toggle input {
  opacity: 0;
  width: 0;
  height: 0;
  position: absolute;
}

.toggle-track {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-full);
  background: var(--color-surface-3);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: background var(--transition-base), border-color var(--transition-base);
}

.toggle-thumb {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-text-muted);
  transition: transform var(--transition-base), background var(--transition-base);
}

.toggle input:checked + .toggle-track { background: var(--color-accent); border-color: var(--color-accent); }
.toggle input:checked + .toggle-track .toggle-thumb { transform: translateX(18px); background: #fff; }

.toggle-label {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  cursor: pointer;
}

/* Number Input */
.settings-input {
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  color: var(--color-text-primary);
  font-size: 0.875rem;
  width: 100%;
  transition: border-color var(--transition-fast);
  outline: none;
}

.settings-input:focus {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px var(--color-accent-glow);
}

/* ─── Batch Action Bar ────────────────────────── */
.batch-bar {
  background: linear-gradient(135deg, var(--color-surface), var(--color-surface-2));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-top: var(--space-5);
  animation: fade-up 0.3s ease forwards;
}

.batch-stats {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.batch-stats strong {
  color: var(--color-text-primary);
  font-weight: 700;
}

.batch-savings {
  color: var(--color-success);
  font-weight: 600;
}

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

/* ─── Info Card ──────────────────────────────── */
.info-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: all var(--transition-base);
}

.info-card:hover {
  border-color: var(--color-border-light);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.info-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-4);
}

.info-card-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.info-card-badge {
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.info-card p {
  font-size: 0.85rem;
  line-height: 1.6;
}

/* ─── Toast Notifications ────────────────────── */
.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  font-size: 0.875rem;
  color: var(--color-text-primary);
  pointer-events: all;
  animation: toast-in 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
  max-width: 360px;
  backdrop-filter: blur(10px);
}

.toast.toast-success { border-color: rgba(34, 197, 94, 0.3); }
.toast.toast-error   { border-color: rgba(239, 68, 68, 0.3); }
.toast.toast-warning { border-color: rgba(245, 158, 11, 0.3); }
.toast.toast-info    { border-color: rgba(108, 99, 255, 0.3); }

.toast-icon { font-size: 1.1rem; flex-shrink: 0; }
.toast-message { flex: 1; font-weight: 500; }
.toast-close {
  font-size: 0.9rem;
  color: var(--color-text-dim);
  cursor: pointer;
  background: none;
  border: none;
  padding: 2px;
  flex-shrink: 0;
  line-height: 1;
  transition: color var(--transition-fast);
}
.toast-close:hover { color: var(--color-text-primary); }

.toast.exiting {
  animation: toast-out 0.25s ease forwards;
}

/* ─── Section Titles ─────────────────────────── */
.section-title-group {
  text-align: center;
  margin-bottom: var(--space-4);
}

.section-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  margin-bottom: var(--space-3);
}

.section-title-group h2 {
  margin-bottom: var(--space-3);
}

.section-title-group p {
  max-width: 540px;
  margin: 0 auto;
}

/* ─── Divider ────────────────────────────────── */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border), transparent);
  margin: var(--space-8) 0;
}

/* ─── Empty State ────────────────────────────── */
.empty-state {
  text-align: center;
  padding: var(--space-10);
  color: var(--color-text-dim);
  font-size: 0.9rem;
  display: none;
}

.empty-state.visible { display: block; }

/* ─── Spinner ────────────────────────────────── */
.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
  flex-shrink: 0;
}

/* ─── Responsive ─────────────────────────────── */
@media (max-width: 640px) {
  .settings-grid { grid-template-columns: 1fr; }
  .file-cards-grid { grid-template-columns: 1fr; }
  .batch-bar { flex-direction: column; align-items: flex-start; }
  .toast-container { bottom: var(--space-4); right: var(--space-4); left: var(--space-4); }
  .toast { max-width: 100%; }
}