/* ============================================
   模态框/弹窗样式
   ============================================ */

.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-modal);
  animation: fadeIn 0.2s ease;
  padding: 20px;
}

.modal {
  background: var(--bg-modal);
  border-radius: var(--border-radius-xl);
  box-shadow: var(--shadow-xl);
  display: flex;
  flex-direction: column;
  max-height: 90vh;
  animation: modalSlideUp 0.3s ease;
  overflow: hidden;
}

.modal-small { width: 440px; }
.modal-medium { width: 580px; }
.modal-large { width: 720px; }
.modal-xlarge { width: 900px; max-width: 95vw; }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border-light);
  flex-shrink: 0;
}
.modal-header h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}
.modal-close {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: transparent;
  color: var(--text-muted);
  font-size: 16px;
  transition: all var(--transition-fast);
}
.modal-close:hover {
  background: var(--bg-surface-hover);
  color: var(--text-primary);
}

.modal-body {
  padding: 20px 24px;
  overflow-y: auto;
  flex: 1;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 10px;
  padding: 14px 24px;
  border-top: 1px solid var(--border-light);
  flex-shrink: 0;
}

@keyframes modalSlideUp {
  from {
    opacity: 0;
    transform: translateY(30px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}