.mail-detail-container {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--pm-surface-glass);
  border-radius: var(--pm-radius-xl);
  box-shadow: var(--pm-shadow-md);
  border: 1px solid var(--pm-glass-border);
  backdrop-filter: blur(18px);
  overflow: hidden;
  animation: pm-rise-in 0.34s var(--pm-ease-out);
}

.mail-detail-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 24px;
  border-bottom: 1px solid var(--pm-border-color);
  background: var(--pm-surface-glass-soft);
}

.back-btn {
  border-radius: 12px;
  font-size: 16px;
  padding: 8px 10px;
  transition: transform 0.2s var(--pm-ease-out);
}

.back-btn:hover {
  transform: translateY(-1px);
}

.action-buttons .el-button {
  border-radius: 12px;
  font-size: 16px;
  transition: transform 0.2s var(--pm-ease-out);
}

.action-buttons .el-button:hover {
  transform: translateY(-1px);
}

.mail-detail-content {
  flex-grow: 1;
  overflow-y: auto;
  padding: 28px 30px;
}

.mail-detail-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 32px 20px;
  text-align: center;
  color: var(--pm-text-secondary);
}

.mail-detail-state h1 {
  margin: 0;
  font-size: 22px;
  color: var(--pm-text-primary);
}

.mail-detail-state p {
  margin: 0;
}

.mail-detail-state-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 12px;
}

.mail-detail-state-actions .el-button + .el-button {
  margin-left: 0;
}

.mail-subject {
  font-size: 36px;
  font-weight: 600;
  color: var(--pm-text-primary);
  margin: 0 0 22px 0;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.mail-meta-card {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 18px;
  padding: 16px 18px;
  border-radius: var(--pm-radius-lg);
  border: 1px solid var(--pm-border-color);
  background: var(--pm-surface-glass);
}

.meta-left {
  display: flex;
  align-items: center;
  gap: 16px;
}

.avatar-placeholder {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--pm-primary-light-3), var(--pm-primary-color));
  color: white;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 20px;
  font-weight: 600;
  flex-shrink: 0;
}

.sender-line {
  margin-bottom: 4px;
}

.sender-name {
  font-weight: 600;
  font-size: 16px;
  color: var(--pm-text-primary);
  margin-right: 8px;
}

.sender-email {
  color: var(--pm-text-secondary);
  font-size: 14px;
}

.receivers-line {
  font-size: 13px;
  color: var(--pm-text-secondary);
}

.meta-label {
  color: var(--pm-text-muted);
  margin-right: 4px;
}

.cc-section {
  margin-left: 12px;
}

.meta-right {
  color: var(--pm-text-secondary);
  font-size: 14px;
}

.custom-divider {
  margin: 10px 0 26px 0;
}

.mail-body {
  font-size: 16px;
  line-height: 1.7;
  color: var(--pm-text-primary);
  min-height: 200px;
}

.body-html :deep(img) {
  max-width: 100%;
  height: auto;
}

.body-text {
  white-space: pre-wrap;
}

.attachments-section {
  margin-top: 32px;
}

.attachments-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--pm-text-primary);
}

.attachments-list {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.attachment-card {
  display: flex;
  align-items: center;
  padding: 12px 16px;
  border: 1px solid var(--pm-border-color);
  border-radius: 14px;
  background-color: var(--pm-surface-muted);
  transition: transform 0.2s var(--pm-ease-out), box-shadow 0.2s var(--pm-ease-out), border-color 0.2s;
  min-width: 200px;
  max-width: 300px;
}

.attachment-card:hover {
  border-color: var(--pm-primary-color);
  background-color: var(--pm-bg-hover);
  box-shadow: var(--pm-shadow-sm);
  transform: translateY(-1px);
}

.att-icon {
  font-size: 24px;
  color: var(--pm-text-secondary);
  margin-right: 12px;
}

.att-name {
  flex-grow: 1;
  font-size: 14px;
  color: var(--pm-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-right: 12px;
}

.att-download {
  color: var(--pm-primary-color);
  font-size: 18px;
}

@media (max-width: 768px) {
  .mail-detail-header {
    padding: 12px 16px;
  }
  .mail-detail-content {
    padding: 20px 16px;
  }
  .mail-subject {
    font-size: 22px;
  }
  .mail-meta-card {
    flex-direction: column;
    gap: 12px;
  }
  .meta-right {
    padding-left: 64px; /* align with text */
  }
  .avatar-placeholder {
    width: 40px;
    height: 40px;
    font-size: 16px;
  }
}