/* ===========================================================
   Base / Reset
   =========================================================== */
* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: var(--fs-base);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.text-center {
  text-align: center;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.skip-link {
  position: absolute;
  top: -48px;
  left: var(--space-4);
  background: var(--color-primary);
  color: #fff;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-sm);
  z-index: 200;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: var(--space-3);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

section {
  padding: var(--space-8) 0;
}

/* ===========================================================
   Buttons
   =========================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: inherit;
  font-weight: 600;
  font-size: var(--fs-base);
  border-radius: var(--radius-pill);
  border: none;
  cursor: pointer;
  padding: var(--space-3) var(--space-5);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
  text-decoration: none;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-primary-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn-secondary {
  background: #fff;
  color: var(--color-primary-dark);
  border: 1.5px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

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

.btn-accent:hover:not(:disabled) {
  background: var(--color-accent-orange-dark);
  transform: translateY(-1px);
}

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

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

.btn-lg {
  padding: var(--space-4) var(--space-6);
  font-size: var(--fs-md);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--fs-sm);
}

.btn-block {
  width: 100%;
  display: flex;
}

/* Button ripple */
.btn .ripple {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  animation: ripple 600ms ease-out;
  background: rgba(255, 255, 255, 0.5);
  pointer-events: none;
}

@keyframes ripple {
  to {
    transform: scale(3);
    opacity: 0;
  }
}

.badge-soft {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  border: 1px solid #cddafc;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  font-size: var(--fs-sm);
  font-weight: 600;
}

/* ===========================================================
   Hero
   =========================================================== */
.hero-section {
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, var(--hero-bg-start) 0%, var(--hero-bg-end) 55%, var(--hero-bg-start) 100%);
  padding: var(--space-8) 0;
}

.hero-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 12% 15%, rgba(26, 92, 255, 0.10), transparent 40%),
    radial-gradient(circle at 88% 25%, rgba(255, 122, 48, 0.10), transparent 45%);
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 1;
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.hero-title {
  color: var(--color-text);
  font-weight: 800;
  font-size: clamp(2rem, 5vw, var(--fs-2xl));
  line-height: 1.15;
  margin: var(--space-4) 0;
}

.hero-title .accent {
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-orange));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  color: var(--color-text-muted);
  font-size: var(--fs-md);
  margin: 0 0 var(--space-6);
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-3);
}

.hero-trust {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-5);
  flex-wrap: wrap;
  margin-top: var(--space-6);
  color: var(--color-text-subtle);
  font-size: var(--fs-sm);
}

.hero-trust span {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.hero-trust svg {
  color: var(--color-accent);
  flex-shrink: 0;
}

/* ===========================================================
   Cards
   =========================================================== */
.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-6);
}

/* ===========================================================
   Upload card
   =========================================================== */
.upload-section {
  margin-top: calc(var(--space-8) * -1 + var(--space-4));
  position: relative;
  z-index: 2;
}

.upload-card {
  max-width: 760px;
  margin: 0 auto;
  padding: var(--space-7);
}

.dropzone {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-7) var(--space-5);
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition-base), background var(--transition-base);
  color: var(--color-text-muted);
}

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

.dropzone.dragover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
  box-shadow: var(--shadow-md);
}

.dropzone-icon {
  color: var(--color-primary);
  margin: 0 auto var(--space-3);
}

.dropzone-title {
  font-size: var(--fs-md);
  font-weight: 700;
  color: var(--color-text);
  margin: 0 0 var(--space-1);
}

.dropzone-subtitle {
  margin: 0 0 var(--space-3);
}

.link-text {
  color: var(--color-primary);
  font-weight: 600;
  text-decoration: underline;
}

.dropzone-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  font-size: var(--fs-sm);
  color: var(--color-text-subtle);
  margin: 0;
}

.dropzone-meta .dot {
  opacity: 0.5;
}

/* ===========================================================
   Upload — file list, progress, errors
   =========================================================== */
.hidden {
  display: none !important;
}

.form-error {
  color: var(--color-danger);
  font-size: var(--fs-sm);
  min-height: 1.2em;
  margin: var(--space-3) 0 0;
  text-align: center;
}

.files-card {
  margin-top: var(--space-5);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}

.section-header h2 {
  margin: 0;
  font-size: var(--fs-md);
}

.files-header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.progress-summary {
  color: var(--color-text-muted);
  font-size: var(--fs-sm);
}

.progress-bar-track {
  width: 100%;
  height: 8px;
  border-radius: var(--radius-pill);
  background: var(--color-border);
  overflow: hidden;
  margin-bottom: var(--space-5);
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-pill);
  transition: width var(--transition-base);
}

.file-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.file-item {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface-alt);
}

.file-thumb {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  background: var(--color-border);
  flex-shrink: 0;
}

.file-meta {
  flex: 1;
  min-width: 0;
}

.file-name {
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  margin: 0 0 2px;
}

.file-details {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-2);
}

.file-progress-track {
  width: 100%;
  height: 6px;
  border-radius: var(--radius-pill);
  background: var(--color-border);
  overflow: hidden;
  display: none;
}

.file-item[data-status="uploading"] .file-progress-track {
  display: block;
}

.file-progress-fill {
  height: 100%;
  width: 0%;
  background: var(--color-primary);
  border-radius: var(--radius-pill);
  transition: width var(--transition-fast);
}

.file-error {
  color: var(--color-danger);
  font-size: var(--fs-sm);
  margin: var(--space-1) 0 0;
  display: none;
}

.file-item[data-status="failed"] .file-error {
  display: block;
}

.file-status {
  font-size: var(--fs-sm);
  font-weight: 600;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  flex-shrink: 0;
}

.file-item[data-status="pending"] .file-status,
.file-item[data-status="validating"] .file-status { color: var(--color-text-muted); background: var(--color-border); }
.file-item[data-status="uploading"] .file-status,
.file-item[data-status="processing"] .file-status { color: var(--color-primary-dark); background: var(--color-primary-light); }
.file-item[data-status="uploaded"] .file-status { color: #067a4a; background: var(--color-accent-light); }
.file-item[data-status="done"] .file-status { color: #067a4a; background: var(--color-accent-light); }
.file-item[data-status="failed"] .file-status { color: var(--color-danger); background: var(--color-danger-light); }

.file-remove {
  background: transparent;
  border: none;
  color: var(--color-text-subtle);
  cursor: pointer;
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  flex-shrink: 0;
  display: flex;
}

.file-remove:hover {
  background: var(--color-danger-light);
  color: var(--color-danger);
}

.file-edit-btn,
.file-download-btn {
  display: none;
  flex-shrink: 0;
  white-space: nowrap;
}

.file-item[data-status="uploaded"] .file-edit-btn,
.file-item[data-status="done"] .file-edit-btn,
.file-item[data-status="failed"] .file-edit-btn {
  display: inline-flex;
}

.file-item[data-status="done"] .file-download-btn {
  display: inline-flex;
}

/* ===========================================================
   Batch actions
   =========================================================== */
.batch-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.batch-actions .output-format-field {
  margin-right: auto;
}

@media (max-width: 600px) {
  .batch-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .batch-actions .output-format-field {
    margin-right: 0;
  }

  .batch-actions .btn {
    width: 100%;
  }
}

/* ===========================================================
   Editor modal — masking tools + AI detection/removal
   =========================================================== */
.editor-overlay {
  position: fixed;
  inset: 0;
  background: rgba(17, 24, 39, 0.6);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
}

.editor-overlay.hidden {
  display: none !important;
}

.editor-modal {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: min(1000px, 100%);
  max-height: 92vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.editor-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.editor-header h3 {
  margin: 0;
  font-size: var(--fs-md);
}

.editor-close {
  background: transparent;
  border: none;
  cursor: pointer;
  color: var(--color-text-muted);
  padding: var(--space-2);
  border-radius: var(--radius-sm);
  display: flex;
}

.editor-close:hover {
  background: var(--color-surface-alt);
  color: var(--color-text);
}

.editor-body {
  overflow-y: auto;
  padding: var(--space-5);
}

.editor-toolbar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.tool-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-surface-alt);
  border: 1.5px solid var(--color-border);
  color: var(--color-text-muted);
  font-family: inherit;
  font-weight: 600;
  font-size: var(--fs-sm);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.tool-btn:hover:not(:disabled) {
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
}

.tool-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.tool-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.toolbar-sep {
  width: 1px;
  height: 24px;
  background: var(--color-border);
  margin: 0 var(--space-1);
}

.brush-size-control {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
}

.icon-btn {
  background: var(--color-surface-alt);
  border: 1.5px solid var(--color-border);
  color: var(--color-text-muted);
  cursor: pointer;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: var(--fs-sm);
  font-weight: 600;
}

.icon-btn:hover:not(:disabled) {
  border-color: var(--color-primary);
  color: var(--color-primary-dark);
}

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

.detect-status {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-3);
  min-height: 1.2em;
}

.detect-status.success { color: #067a4a; }
.detect-status.warning { color: var(--color-accent-orange-dark); }

.editor-canvas-wrap {
  position: relative;
  background: repeating-conic-gradient(#e7ebf2 0% 25%, #f6f8fc 0% 50%) 50% / 20px 20px;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  display: flex;
  justify-content: center;
  max-height: 55vh;
}

.editor-canvas-wrap canvas {
  max-width: 100%;
  max-height: 55vh;
  width: auto;
  height: auto;
  display: block;
}

#mask-canvas {
  position: absolute;
  left: 50%;
  top: 0;
  transform: translateX(-50%);
  cursor: crosshair;
}

.editor-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-top: var(--space-5);
}

.output-format-field {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  font-weight: 600;
}

.editor-result {
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px solid var(--color-border);
}

.editor-result.hidden {
  display: none;
}

/* ===========================================================
   Before/After compare slider
   =========================================================== */
.compare-slider {
  position: relative;
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  margin-bottom: var(--space-4);
  cursor: ew-resize;
  user-select: none;
  background: repeating-conic-gradient(#e7ebf2 0% 25%, #f6f8fc 0% 50%) 50% / 20px 20px;
}

.compare-img {
  display: block;
  width: 100%;
  height: auto;
  pointer-events: none;
  user-select: none;
}

.compare-after {
  position: relative;
}

.compare-before-wrap {
  position: absolute;
  inset: 0;
  width: 50%;
  overflow: hidden;
  border-right: 2px solid #fff;
}

.compare-before {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: auto;
  max-width: none;
}

.compare-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: ew-resize;
  touch-action: none;
}

.compare-handle-grip {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #fff;
  color: var(--color-primary-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-md);
  border: 2px solid var(--color-primary);
}

.compare-handle:focus-visible .compare-handle-grip {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

.compare-badge {
  position: absolute;
  top: var(--space-3);
  background: rgba(17, 24, 39, 0.65);
  color: #fff;
  font-size: var(--fs-sm);
  font-weight: 600;
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-pill);
  pointer-events: none;
}

.compare-badge-before {
  left: var(--space-3);
}

.compare-badge-after {
  right: var(--space-3);
}

.result-meta {
  font-size: var(--fs-sm);
  color: var(--color-text-muted);
  margin: 0 0 var(--space-4);
  text-align: center;
}

.editor-loading {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-7) 0;
  color: var(--color-text-muted);
  font-weight: 600;
}

.spinner {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  animation: spin 800ms linear infinite;
}

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

@media (max-width: 700px) {
  .result-compare {
    grid-template-columns: 1fr;
  }

  .editor-modal {
    max-height: 96vh;
  }
}

/* ===========================================================
   Responsive
   =========================================================== */
@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-3);
  }
}

@media (max-width: 600px) {
  section {
    padding: var(--space-6) 0;
  }

  .upload-card {
    padding: var(--space-5);
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }
}