/**
 * 업로드 섹션 스타일
 *
 * 파일 업로드 드롭존, 파일 미리보기, 고급 옵션 등
 */

/* ========================================
   드롭존 (Drop Zone)
   ======================================== */

.upload-zone {
  position: relative;
  padding: var(--spacing-xl);
  border: 2px dashed hsl(var(--border));
  border-radius: var(--radius);
  background: linear-gradient(135deg,
    hsl(var(--muted) / 0.3) 0%,
    hsl(var(--muted) / 0.1) 100%
  );
  transition: all var(--duration-base) var(--easing-ease-in-out);
  cursor: pointer;
  text-align: center;
}

.upload-zone:hover {
  border-color: hsl(var(--primary));
  background: linear-gradient(135deg,
    hsl(var(--primary) / 0.08) 0%,
    hsl(var(--primary) / 0.05) 100%
  );
  transform: translateY(-2px);
  box-shadow: 0 4px 12px hsl(var(--primary) / 0.15);
}

.upload-zone.drag-over {
  border-color: hsl(var(--primary));
  border-style: solid;
  background: linear-gradient(135deg,
    hsl(var(--primary) / 0.15) 0%,
    hsl(var(--primary) / 0.1) 100%
  );
  box-shadow: 0 0 0 4px hsl(var(--primary) / 0.1);
}

.upload-zone:disabled,
.upload-zone[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
}

.upload-zone__icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  line-height: 1;
  animation: float 3s ease-in-out infinite;
}

.upload-zone__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
}

.upload-zone__title {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  color: hsl(var(--foreground));
}

.upload-zone__hint {
  margin: 0;
  font-size: var(--text-sm);
  color: hsl(var(--muted-foreground));
}

.upload-zone__stats {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  margin-top: var(--spacing-md);
  flex-wrap: wrap;
}

/* ========================================
   통계 배지 (Stat Badge)
   ======================================== */

.stat-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: hsl(var(--background));
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  font-size: var(--text-sm);
}

.stat-badge__icon {
  font-size: 1.25rem;
  line-height: 1;
}

.stat-badge__value {
  font-weight: var(--font-weight-semibold);
  color: hsl(var(--primary));
}

.stat-badge__label {
  font-size: var(--text-xs);
  color: hsl(var(--muted-foreground));
}

/* ========================================
   파일 미리보기 (File Preview)
   ======================================== */

.file-preview {
  margin-top: var(--spacing-lg);
  animation: fade-in var(--duration-slow) var(--easing-ease-out);
}

.file-preview__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--spacing-md);
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

.file-preview__title {
  margin: 0;
  font-size: var(--text-lg);
  font-weight: var(--font-weight-semibold);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.file-preview__actions {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.file-preview__list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  max-height: 300px;
  overflow-y: auto;
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  padding: var(--spacing-sm);
  background-color: hsl(var(--muted) / 0.3);
}

/* ========================================
   파일 아이템 (File Item)
   ======================================== */

.file-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-md);
  background-color: hsl(var(--background));
  border: 1px solid hsl(var(--border));
  border-radius: calc(var(--radius) - 2px);
  transition: all var(--duration-base) var(--easing-ease-in-out);
}

.file-item:hover {
  background-color: hsl(var(--muted) / 0.5);
  box-shadow: var(--shadow-sm);
}

.file-item__icon {
  flex-shrink: 0;
  font-size: 1.5rem;
  line-height: 1;
}

.file-item__info {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.file-item__name {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: hsl(var(--foreground));
  word-break: break-word;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.file-item__size {
  font-size: var(--text-xs);
  color: hsl(var(--muted-foreground));
}

.file-item__remove {
  flex-shrink: 0;
  background: none;
  border: none;
  color: hsl(var(--destructive));
  font-size: 1.25rem;
  cursor: pointer;
  padding: 4px;
  line-height: 1;
  transition: all var(--duration-base) var(--easing-ease-in-out);
  border-radius: 4px;
}

.file-item__remove:hover {
  background-color: hsl(var(--destructive) / 0.1);
  transform: scale(1.1);
}

/* ========================================
   고급 옵션 (Advanced Options)
   ======================================== */

.options-panel {
  margin-top: var(--spacing-lg);
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius);
  overflow: hidden;
}

.options-panel summary {
  padding: var(--spacing-md);
  background-color: hsl(var(--muted) / 0.5);
  cursor: pointer;
  user-select: none;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-weight: var(--font-weight-semibold);
  transition: background-color var(--duration-base) var(--easing-ease-in-out);
}

.options-panel summary:hover {
  background-color: hsl(var(--muted));
}

.options-panel[open] summary {
  border-bottom: 1px solid hsl(var(--border));
}

.options-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  padding: var(--spacing-md);
}

.option-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.option-group label {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: hsl(var(--foreground));
}

.option-group input[type="checkbox"],
.option-group input[type="radio"] {
  width: auto;
  cursor: pointer;
}

/* ========================================
   업로드 섹션 컨테이너
   ======================================== */

.upload-section {
  animation: fade-in var(--duration-slow) var(--easing-ease-out);
}

.upload-actions {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
  justify-content: center;
  flex-wrap: wrap;
}

.upload-actions .btn {
  flex: 1;
  min-width: 150px;
}

/* ========================================
   애니메이션
   ======================================== */

@keyframes float {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

/* ========================================
   반응형 디자인
   ======================================== */

@media (max-width: 768px) {
  .upload-zone {
    padding: var(--spacing-lg);
  }

  .upload-zone__icon {
    font-size: 2rem;
  }

  .upload-zone__title {
    font-size: var(--text-base);
  }

  .file-preview__header {
    flex-direction: column;
    align-items: flex-start;
  }

  .file-preview__actions {
    width: 100%;
  }

  .file-preview__actions .btn {
    flex: 1;
  }

  .file-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .file-item__info {
    width: 100%;
  }

  .upload-zone__stats {
    gap: var(--spacing-sm);
  }

  .stat-badge {
    font-size: var(--text-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
  }

  .options-grid {
    grid-template-columns: 1fr;
  }

  .upload-actions {
    gap: var(--spacing-sm);
  }

  .upload-actions .btn {
    min-width: auto;
    width: 100%;
  }
}

/* ========================================
   파일 통계 스타일
   ======================================== */
.file-stats {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.file-stats-info {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.file-count-badge,
.file-size-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.375rem 0.75rem;
  border-radius: 0.375rem;
  font-size: 0.875rem;
  font-weight: 500;
  background-color: var(--accent);
  color: var(--accent-foreground);
}

.file-count-badge {
  background-color: var(--primary);
  color: var(--primary-foreground);
}

.file-size-badge {
  background-color: var(--muted);
  color: var(--foreground);
}