/* ===== Reset & Base ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --sidebar-width: 320px;
  --color-bg: #f0f2f5;
  --color-surface: #ffffff;
  --color-sidebar: #0f172a;
  --color-sidebar-accent: #1e293b;
  --color-primary: #3b82f6;
  --color-primary-hover: #2563eb;
  --color-primary-soft: #eff6ff;
  --color-danger: #ef4444;
  --color-danger-hover: #dc2626;
  --color-success: #22c55e;
  --color-success-hover: #16a34a;
  --color-warning: #f59e0b;
  --color-text: #0f172a;
  --color-text-secondary: #475569;
  --color-text-muted: #94a3b8;
  --color-text-light: #cbd5e1;
  --color-border: #e2e8f0;
  --color-border-hover: #cbd5e1;
  --radius: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.15);
  --transition-fast: 150ms ease;
  --transition: 200ms ease;
  --transition-slow: 300ms ease;
}

html {
  font-size: 15px;
}

body {
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Oxygen, Ubuntu, Cantarell, "Helvetica Neue", Arial, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ===== Sidebar ===== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: var(--color-sidebar);
  color: #e2e8f0;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  transform: translateX(-100%);
  transition: transform var(--transition-slow);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.sidebar.open {
  transform: translateX(0);
}

.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-slow);
}

.sidebar-overlay.visible {
  opacity: 1;
  pointer-events: auto;
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 20px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.sidebar-header h2 {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}

.sidebar-close {
  background: none;
  border: none;
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.sidebar-close:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.sidebar-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.form-group label {
  font-size: 0.73rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
}

.form-group input,
.form-group textarea {
  background: var(--color-sidebar-accent);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  padding: 10px 12px;
  color: #f1f5f9;
  font-size: 0.87rem;
  font-family: inherit;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #475569;
}

.form-group textarea {
  resize: vertical;
  min-height: 64px;
}

.form-row {
  display: flex;
  gap: 12px;
}

.input-with-toggle {
  position: relative;
  display: flex;
}

.input-with-toggle input {
  padding-right: 42px;
}

.input-toggle {
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: #64748b;
  cursor: pointer;
  padding: 6px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
}

.input-toggle:hover {
  color: #94a3b8;
  background: rgba(255, 255, 255, 0.06);
}

.sidebar-actions {
  display: flex;
  gap: 10px;
  margin-top: 4px;
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.sidebar-actions .btn {
  flex: 1;
  justify-content: center;
}

/* ===== Main Content ===== */
.main-content {
  min-height: 100vh;
  padding-bottom: 48px;
}

/* ===== Top Bar ===== */
.top-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 32px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.top-bar-title {
  font-size: 1.13rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.top-bar-badge {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  padding: 3px 8px;
  border-radius: 9999px;
}

.btn-icon {
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  width: 40px;
  height: 40px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-secondary);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.btn-icon:hover {
  background: var(--color-bg);
  color: var(--color-text);
  border-color: var(--color-border-hover);
}

/* ===== Upload Section ===== */
.upload-section {
  padding: 24px 32px 0;
}

.drop-zone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-xl);
  padding: 40px 24px;
  text-align: center;
  cursor: pointer;
  background: var(--color-surface);
  transition: all var(--transition);
  position: relative;
}

.drop-zone:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}

.drop-zone.drag-over {
  border-color: var(--color-primary);
  background: #dbeafe;
  border-style: solid;
  box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.12);
}

.drop-zone-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  pointer-events: none;
}

.drop-zone-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
  transition: all var(--transition);
}

.drop-zone:hover .drop-zone-icon-wrap {
  background: #dbeafe;
}

.drop-zone-icon {
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.drop-zone:hover .drop-zone-icon {
  color: var(--color-primary);
}

.drop-zone-text {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

.drop-zone-hint {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.drop-zone input[type="file"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

/* ===== Actions Bar ===== */
.actions-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px 32px;
  flex-wrap: wrap;
}

.actions-spacer {
  flex: 1;
  min-width: 8px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition-fast);
  line-height: 1.4;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

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

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 1px 2px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-hover);
  box-shadow: 0 2px 8px rgba(59, 130, 246, 0.35);
}

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}

.btn-danger:hover:not(:disabled) {
  background: var(--color-danger-hover);
}

.btn-success {
  background: var(--color-success);
  color: #fff;
}

.btn-success:hover:not(:disabled) {
  background: var(--color-success-hover);
}

.btn-ghost {
  background: var(--color-surface);
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.btn-ghost:hover:not(:disabled) {
  background: var(--color-bg);
  border-color: var(--color-border-hover);
  color: var(--color-text);
}

/* ===== Sections ===== */
.section {
  padding: 0 32px 16px;
}

.section-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
  padding-top: 8px;
}

.section-title {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--color-text);
}

.section-count {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--color-text-muted);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  padding: 1px 8px;
  border-radius: 9999px;
  display: none;
}

.section-count.visible {
  display: inline-block;
}

/* ===== Empty State ===== */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 32px 16px;
  color: var(--color-text-muted);
  text-align: center;
}

.empty-state svg {
  opacity: 0.35;
}

.empty-state p {
  font-size: 0.85rem;
}

.empty-state.hidden {
  display: none;
}

/* ===== Image Queue Grid ===== */
.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 12px;
}

.queue-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
  cursor: pointer;
}

.queue-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-hover);
}

.queue-card-thumb {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
  background: var(--color-bg);
}

.queue-card-info {
  padding: 8px 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 6px;
}

.queue-card-name {
  font-size: 0.75rem;
  color: var(--color-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  min-width: 0;
}

/* ===== Status Badge ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 9999px;
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  white-space: nowrap;
  flex-shrink: 0;
}

.badge-pending {
  background: #f1f5f9;
  color: #64748b;
}

.badge-detecting {
  background: #dbeafe;
  color: #2563eb;
  animation: pulse-badge 2s ease-in-out infinite;
}

.badge-masking {
  background: #fef3c7;
  color: #d97706;
  animation: pulse-badge 2s ease-in-out infinite;
}

.badge-done {
  background: #dcfce7;
  color: #16a34a;
}

.badge-error {
  background: #fee2e2;
  color: #dc2626;
}

@keyframes pulse-badge {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.badge-pptx {
  background: #fef3c7;
  color: #92400e;
}

.queue-card[data-pptx] {
  border-left: 3px solid #f59e0b;
}

.result-card[data-pptx] {
  border-left: 3px solid #f59e0b;
}

/* ===== Results Gallery ===== */
.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 16px;
}

.result-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xs);
  border: 1px solid var(--color-border);
  transition: all var(--transition-fast);
}

.result-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-border-hover);
}

.result-card-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.result-card-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
  cursor: pointer;
  transition: opacity var(--transition-fast);
}

.result-card-img:hover {
  opacity: 0.85;
}

.result-card-label {
  text-align: center;
  padding: 5px 4px;
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  background: var(--color-bg);
}

.result-card-footer {
  padding: 10px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  border-top: 1px solid var(--color-border);
}

.result-card-name {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  min-width: 0;
}

.result-card-name-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  min-width: 0;
}

.result-card-download {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 4px 10px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.7rem;
  font-weight: 600;
  font-family: inherit;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.result-card-download:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
  background: var(--color-primary-soft);
}

/* ===== Toast Notifications ===== */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 18px;
  border-radius: var(--radius-lg);
  font-size: 0.85rem;
  font-weight: 500;
  color: #fff;
  box-shadow: var(--shadow-xl);
  pointer-events: auto;
  animation: toast-in 0.3s ease forwards;
  max-width: 380px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

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

.toast-success {
  background: rgba(34, 197, 94, 0.92);
}

.toast-error {
  background: rgba(239, 68, 68, 0.92);
}

.toast-info {
  background: rgba(59, 130, 246, 0.92);
}

.toast-warning {
  background: rgba(245, 158, 11, 0.92);
  color: #1e293b;
}

@keyframes toast-in {
  from {
    opacity: 0;
    transform: translateY(-8px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@keyframes toast-out {
  from {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
  to {
    opacity: 0;
    transform: translateY(-8px) scale(0.96);
  }
}

/* ===== Lightbox ===== */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 10000;
  background: rgba(0, 0, 0, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 48px;
  animation: fade-in 0.2s ease;
}

.lightbox[hidden] {
  display: none;
}

.lightbox-close {
  position: absolute;
  top: 16px;
  right: 20px;
  background: rgba(255, 255, 255, 0.1);
  border: none;
  color: #fff;
  cursor: pointer;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0.7;
  transition: all var(--transition-fast);
}

.lightbox-close:hover {
  opacity: 1;
  background: rgba(255, 255, 255, 0.18);
}

.lightbox-img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: var(--radius);
  box-shadow: 0 0 80px rgba(0, 0, 0, 0.4);
}

@keyframes fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* ===== Spinner ===== */
.spinner {
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.25);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.65s linear infinite;
  display: inline-block;
  flex-shrink: 0;
}

.spinner-dark {
  border-color: rgba(0, 0, 0, 0.08);
  border-top-color: var(--color-primary);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ===== Reduced Motion ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  :root {
    --sidebar-width: 100%;
  }

  .sidebar {
    width: 100%;
    height: auto;
    max-height: 85vh;
    top: 0;
    left: 0;
    right: 0;
    transform: translateY(-100%);
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
  }

  .sidebar.open {
    transform: translateY(0);
  }

  .top-bar {
    padding: 12px 16px;
  }

  .upload-section,
  .actions-bar,
  .section {
    padding-left: 16px;
    padding-right: 16px;
  }

  .drop-zone {
    padding: 28px 16px;
  }

  .actions-bar {
    gap: 8px;
  }

  .btn {
    padding: 8px 14px;
    font-size: 0.82rem;
  }

  .image-grid {
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 10px;
  }

  .results-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .lightbox {
    padding: 16px;
  }

  .toast-container {
    top: 12px;
    right: 12px;
    left: 12px;
  }

  .toast {
    max-width: 100%;
  }
}

@media (max-width: 480px) {
  .image-grid {
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  }

  .actions-bar {
    flex-wrap: wrap;
  }

  .actions-spacer {
    display: none;
  }

  .actions-bar .btn {
    flex: 1 1 calc(50% - 4px);
    justify-content: center;
  }

  .top-bar-badge {
    display: none;
  }
}