/**
 * File Upload CSS - Domovik Design System
 * Drag-and-drop upload zones, file preview chips, GDPR info boxes
 *
 * States: default → hover → drag-over → loading → success/error
 * All tokens from base.css design system
 */

/* ==========================================================================
   Section III Layout
   ========================================================================== */

.section-iii {
  margin-top: var(--space-6);
}

.section-iii__fieldset {
  border: none;
  padding: 0;
  margin: 0;
}

/* ==========================================================================
   File Upload Section Container
   ========================================================================== */

.file-upload-section {
  margin-bottom: var(--space-6);
  padding: var(--space-5);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border-light);
}

.file-upload-section__title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-heading);
  margin-bottom: var(--space-4);
  padding-left: var(--space-4);
  border-left: 3px solid var(--color-accent);
}

/* ==========================================================================
   Upload Zone (Drag & Drop)
   ========================================================================== */

.upload-zone {
  position: relative;
  min-height: 140px;
  border: 2px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-7) var(--space-5);
  text-align: center;
  background: var(--color-bg);
  transition: all var(--transition-base);
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-3);
}

/* Upload arrow icon (CSS-only) */
.upload-zone::before {
  content: '';
  display: block;
  width: 40px;
  height: 40px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23707070' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 15v4a2 2 0 01-2 2H5a2 2 0 01-2-2v-4'/%3E%3Cpolyline points='17 8 12 3 7 8'/%3E%3Cline x1='12' y1='3' x2='12' y2='15'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
  opacity: 0.5;
  transition: all var(--transition-base);
}

/* Hover — solid border, light primary bg */
.upload-zone:hover {
  border-color: var(--color-primary);
  border-style: solid;
  background: var(--color-primary-light);
}

.upload-zone:hover::before {
  opacity: 0.8;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23006AAF' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 15v4a2 2 0 01-2 2H5a2 2 0 01-2-2v-4'/%3E%3Cpolyline points='17 8 12 3 7 8'/%3E%3Cline x1='12' y1='3' x2='12' y2='15'/%3E%3C/svg%3E");
}

/* Drag-over — accent highlight */
.upload-zone.drag-over {
  border-color: var(--color-accent);
  border-style: solid;
  background: var(--color-accent-light);
  box-shadow: 0 0 0 4px rgba(198, 69, 31, 0.1);
}

.upload-zone.drag-over::before {
  opacity: 1;
  transform: translateY(-4px);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23C6451F' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 15v4a2 2 0 01-2 2H5a2 2 0 01-2-2v-4'/%3E%3Cpolyline points='17 8 12 3 7 8'/%3E%3Cline x1='12' y1='3' x2='12' y2='15'/%3E%3C/svg%3E");
}

/* Error state on zone */
.upload-zone.upload-zone--error {
  border-color: var(--color-error);
  background: var(--color-error-light);
}

/* Loading state */
.upload-zone--loading {
  pointer-events: none;
  opacity: 0.6;
}

/* Upload CTA Button */
.upload-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border: none;
  border-radius: var(--radius-md);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-width: 160px;
  min-height: 44px;
}

.upload-btn:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 106, 175, 0.3);
}

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

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

/* Drag text */
.upload-zone .drag-text {
  margin: 0;
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 400;
}

/* Help text (within upload zone) */
.upload-zone .help-text {
  margin-top: 0;
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  opacity: 0.8;
}


/* ==========================================================================
   Uploaded Files — Chip / Tag Style
   ========================================================================== */

.uploaded-files-list {
  margin-top: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

/* File preview card — compact chip layout */
.file-preview-card {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  animation: fileSlideIn 250ms ease-out;
}

.file-preview-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}

@keyframes fileSlideIn {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* File type icon — small colored badge */
.file-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-size: 20px;
}

.file-icon--pdf {
  background: var(--color-error-light);
  color: var(--color-error);
}

.file-icon--doc,
.file-icon--docx {
  background: var(--color-info-light);
  color: var(--color-info);
}

.file-icon--xls,
.file-icon--xlsx {
  background: var(--color-success-light);
  color: var(--color-success);
}

/* File info */
.file-info {
  flex: 1;
  min-width: 0;
}

.file-name {
  display: block;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  color: var(--color-text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  line-height: 1.4;
}

.file-size {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-top: 1px;
}

.file-status {
  display: block;
  font-size: var(--text-xs);
  color: var(--color-warning);
  margin-top: 2px;
  font-weight: 600;
}

/* Delete button (×) — minimal, right-aligned */
.file-delete-btn {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--color-text-secondary);
  border: 1.5px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  font-size: 18px;
  font-weight: 600;
  line-height: 1;
}

.file-delete-btn:hover {
  background: var(--color-error);
  border-color: var(--color-error);
  color: var(--color-text-inverse);
}

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

.delete-icon {
  display: block;
  line-height: 1;
}

/* Re-upload Button (for draft metadata) */
.re-upload-btn {
  flex-shrink: 0;
  padding: var(--space-2) var(--space-3);
  background: var(--color-primary);
  color: var(--color-text-inverse);
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 32px;
}

.re-upload-btn:hover {
  background: var(--color-primary-dark);
}

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

/* Metadata preview card (draft recovered, needs re-upload) */
.file-preview-card--metadata {
  border: 2px dashed var(--color-warning);
  background: var(--color-warning-light);
}


/* ==========================================================================
   Upload Progress Bar
   ========================================================================== */

.upload-progress {
  margin-top: var(--space-3);
  margin-bottom: var(--space-3);
}

.upload-progress__bar-container {
  width: 100%;
  height: 6px;
  background: var(--color-border-light);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.upload-progress__bar {
  height: 100%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

.upload-progress__text {
  display: block;
  margin-top: var(--space-1);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  text-align: center;
}


/* ==========================================================================
   Upload Error Message
   ========================================================================== */

.upload-error {
  margin-top: var(--space-4);
  padding: var(--space-3) var(--space-4);
  background: var(--color-error-light);
  border: 1px solid var(--color-error);
  border-left: 4px solid var(--color-error);
  border-radius: var(--radius-md);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  animation: fileSlideIn 200ms ease-out;
}

.error-message {
  flex: 1;
}

.error-icon {
  flex-shrink: 0;
  font-size: 18px;
  color: var(--color-error);
  line-height: 1.4;
}

.error-text {
  display: block;
  color: #922B21;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  line-height: 1.5;
  margin-bottom: var(--space-2);
}

.retry-btn {
  padding: var(--space-1) var(--space-3);
  background: var(--color-error);
  color: var(--color-text-inverse);
  border: none;
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 32px;
}

.retry-btn:hover {
  background: #922B21;
}

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


/* ==========================================================================
   Upload Success Feedback
   ========================================================================== */

.upload-success {
  margin-top: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-success-light);
  border: 1px solid var(--color-success);
  border-left: 4px solid var(--color-success);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  animation: fileSlideIn 200ms ease-out;
}

.success-icon {
  flex-shrink: 0;
  font-size: 18px;
  color: var(--color-success);
  font-weight: 700;
}

.success-text {
  color: #1E7E34;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
}


/* ==========================================================================
   Loading Spinner
   ========================================================================== */

.loading-spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2.5px solid var(--color-border-light);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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


/* ==========================================================================
   GDPR / Draft Reminder — Styled Info Box
   ========================================================================== */

.draft-reminder {
  margin-top: var(--space-5);
  padding: var(--space-4);
  background: var(--color-info-light);
  border: 1px solid var(--color-info);
  border-left: 4px solid var(--color-info);
  border-radius: var(--radius-md);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.draft-reminder__icon {
  flex-shrink: 0;
  font-size: 18px;
  color: var(--color-info);
  line-height: 1.5;
}

.draft-reminder__text {
  font-family: var(--font-body);
  color: #1A5276;
  font-size: var(--text-sm);
  line-height: 1.5;
  margin: 0;
}

.draft-reminder__content {
  flex: 1;
}

.draft-reminder__list {
  margin: var(--space-2) 0 0 0;
  padding-left: var(--space-5);
  color: #1A5276;
  font-size: var(--text-sm);
  list-style-type: disc;
}

.draft-reminder__list li {
  margin-bottom: var(--space-1);
}

.draft-reminder__note {
  margin: var(--space-3) 0 0 0;
  color: var(--color-text-secondary);
  font-size: var(--text-xs);
  font-style: italic;
}

/* File metadata reminder (draft recovered files) */
.file-metadata-reminder {
  margin-top: var(--space-5);
  padding: var(--space-4);
  background: var(--color-warning-light);
  border: 1px solid var(--color-warning);
  border-left: 4px solid var(--color-warning);
  border-radius: var(--radius-md);
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
}

.file-metadata-reminder__icon {
  flex-shrink: 0;
  font-size: 18px;
  color: var(--color-warning);
}

.file-metadata-reminder__content {
  flex: 1;
}

.file-metadata-reminder__content strong {
  display: block;
  margin-bottom: var(--space-2);
  color: var(--color-text);
  font-size: var(--text-sm);
}

.file-metadata-reminder__content p {
  margin: 0 0 var(--space-2) 0;
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.file-metadata-reminder__list {
  margin: 0;
  padding-left: var(--space-5);
  color: var(--color-text);
  font-size: var(--text-sm);
}


/* ==========================================================================
   Visual Guidance Steps
   ========================================================================== */

.upload-guidance {
  display: flex;
  align-items: center;
  justify-content: space-around;
  margin-bottom: var(--space-5);
  padding: var(--space-4);
  background: var(--color-surface);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-light);
}

.upload-guidance__step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  text-align: center;
  flex: 1;
}

.upload-guidance__number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-text-inverse);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: var(--text-xs);
}

.upload-guidance__text {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  font-weight: 500;
}


/* ==========================================================================
   Responsive
   ========================================================================== */

@media (max-width: 767px) {
  .file-upload-section {
    padding: var(--space-4);
  }

  /* Upload zone: full-width, min 100px, 48px button targets */
  .upload-zone {
    padding: var(--space-5) var(--space-4);
    min-height: 100px;
    border-radius: var(--radius-md);
  }

  .upload-btn {
    width: 100%;
    min-width: auto;
    min-height: 48px;
  }

  /* File chips: touch-friendly delete button */
  .file-preview-card {
    padding: var(--space-3);
  }

  .file-icon {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }

  .file-name {
    font-size: var(--text-xs);
  }

  .file-delete-btn {
    width: 36px;
    height: 36px;
    min-width: 44px;
    min-height: 44px;
  }

  .upload-guidance {
    flex-direction: column;
    gap: var(--space-3);
  }

  .upload-guidance__step {
    flex-direction: row;
    justify-content: flex-start;
    width: 100%;
    gap: var(--space-3);
  }

  /* Section title smaller */
  .file-upload-section__title {
    font-size: var(--text-base);
    padding-left: var(--space-3);
  }
}

@media (min-width: 1024px) {
  .file-preview-card {
    max-width: 600px;
  }

  .upload-zone {
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
  }
}


/* ==========================================================================
   Accessibility
   ========================================================================== */

@media (prefers-contrast: high) {
  .upload-zone {
    border-width: 3px;
  }

  .file-preview-card {
    border-width: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .file-preview-card,
  .upload-btn,
  .file-delete-btn,
  .upload-zone,
  .upload-zone::before {
    transition: none;
  }

  .loading-spinner {
    animation: none;
  }

  @keyframes fileSlideIn {
    from, to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}