/* ==============================================
   Freemail - 按钮 / 邮件列表 / 发件样式
   ============================================== */

/* ===== 增强按钮系统 ===== */
.btn{
  background: var(--card-glass);
  color: var(--text);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 14px 24px;
  cursor: pointer;
  transition: all 0.25s var(--ease-out-expo);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: -0.01em;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.5);
  backdrop-filter: var(--blur-md);
  -webkit-backdrop-filter: var(--blur-md);
}

.btn::before{
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  transition: left 0.5s var(--ease-out-expo);
}

.btn::after{
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.15) 0%, transparent 50%);
  border-radius: inherit;
  opacity: 1;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.btn:hover{
  background: var(--card-glass-hover);
  box-shadow: var(--shadow-md), inset 0 1px 0 rgba(255, 255, 255, 0.6);
  border-color: var(--border-focus);
  transform: translateY(-2px);
}

.btn:hover::before{
  left: 100%;
}

.btn:active{
  transform: translateY(0) scale(0.98);
  box-shadow: var(--shadow-xs), inset 0 2px 4px rgba(0, 0, 0, 0.05);
  transition-duration: 0.1s;
}

.btn:focus-visible{
  outline: none;
  box-shadow: var(--shadow-md), 0 0 0 3px var(--primary-light);
}

/* 主要按钮 - 鲜艳渐变 */
.btn-primary{
  background: var(--primary-gradient);
  color: var(--text-inverse);
  border: none;
  box-shadow: var(--shadow-button);
}

.btn-primary::after{
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.2) 0%, transparent 60%);
}

.btn-primary:hover{
  background: linear-gradient(135deg, var(--primary-hover) 0%, #7c3aed 50%, #a855f7 100%);
  box-shadow: var(--shadow-button-hover);
  transform: translateY(-3px);
  border: none;
}

.btn-primary:active{
  background: linear-gradient(135deg, var(--primary-active) 0%, #6d28d9 100%);
  box-shadow: var(--shadow), inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

/* 次要按钮 - 透明玻璃 */
.btn-secondary{
  background: var(--card-glass);
  color: var(--text);
  border: 1px solid var(--border-glass);
  backdrop-filter: var(--blur-lg);
  -webkit-backdrop-filter: var(--blur-lg);
  box-shadow: var(--shadow), inset 0 1px 0 rgba(255, 255, 255, 0.4);
}

.btn-secondary:hover{
  background: var(--card-glass-hover);
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-md), 0 0 0 1px var(--primary-light);
  transform: translateY(-2px);
}

.btn-secondary:active{
  background: var(--primary-light);
}

/* 危险按钮 - 红色渐变 */
.btn-danger{
  background: var(--danger-gradient);
  color: var(--text-inverse);
  border: none;
  box-shadow: 0 4px 14px rgba(239, 68, 68, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.15);
}

.btn-danger::after{
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.2) 0%, transparent 60%);
}

.btn-danger:hover{
  background: linear-gradient(135deg, var(--danger-hover) 0%, #f87171 100%);
  box-shadow: 0 8px 25px rgba(239, 68, 68, 0.35), inset 0 1px 0 rgba(255, 255, 255, 0.2);
  transform: translateY(-3px);
  border: none;
}

.btn-danger:active{
  background: linear-gradient(135deg, var(--danger-active) 0%, #dc2626 100%);
}

.btn-sm{
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 12px;
  height: 32px;
  gap: 4px;
}

.btn-group{
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}
.list{
  display: flex;
  flex-direction: column;
  gap: 6px;
  /* 防止内部卡片溢出重叠 */
  overflow: visible;
}

.pager{
  margin-top: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}
.pager .btn{ min-width: 90px; }
.pager .muted{ color: var(--muted); font-size: 13px; }

/* ===== 增强邮件列表项 ===== */
.email-item{
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  background: var(--card-glass);
  backdrop-filter: var(--blur-lg);
  -webkit-backdrop-filter: var(--blur-lg);
  box-shadow: var(--shadow-xs);
  transition: all 0.25s var(--ease-out-expo);
  position: relative;
  z-index: 0;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px 12px;
}

.email-item .email-actions{ grid-column: 2; align-self: center; }
.email-item .email-content{ grid-column: 1 / span 1; }

.email-item::before{
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: var(--primary-gradient);
  opacity: 0;
  transition: all 0.25s var(--ease-out-expo);
  border-radius: 0 2px 2px 0;
}

.email-item::after{
  content: '';
  position: absolute;
  inset: 0;
  background: var(--card-gradient-accent);
  opacity: 0;
  transition: opacity 0.25s ease;
  pointer-events: none;
}

.email-item:hover::before{
  opacity: 1;
  width: 5px;
}

.email-item:hover::after{
  opacity: 1;
}

.email-item:hover{
  transform: translateX(4px);
  box-shadow: var(--shadow-md), 0 0 0 1px var(--primary-light);
  border-color: var(--primary);
  background: var(--card-glass-hover);
  z-index: 2;
}

.email-item.clickable{
  cursor: pointer;
}

.email-item.clickable:active{
  transform: translateX(2px) scale(0.995);
  transition-duration: 0.1s;
}

.email-meta{  
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 4px;
  color: var(--muted);
  font-size: 13px;
}
.email-meta{ /* 统一布局：发件人/收件人/时间 */
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
}
.email-meta .meta-from{ 
  display: flex; 
  align-items: center; 
  gap: 6px; 
  min-width: 0;
  max-width: 280px;
  overflow: hidden;
}
.email-meta .meta-label{ 
  font-size: 12px; 
  color: var(--text-light); 
  background: var(--card-glass); 
  border: 1px solid var(--border-glass); 
  border-radius: 999px; 
  padding: 2px 8px;
  white-space: nowrap;
  flex-shrink: 0;
}
.email-meta .meta-from-text{ 
  color: var(--text); 
  font-weight: 600; 
  white-space: nowrap; 
  overflow: hidden; 
  text-overflow: ellipsis;
  min-width: 0;
}
.email-meta .meta-to{
  display: flex;
  align-items: center;
  gap: 6px;
  min-width: 0;
  max-width: 280px;
  overflow: hidden;
}
.email-meta .meta-to-text{
  color: var(--primary);
  font-weight: 500;
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  min-width: 0;
}
.email-time{
  color: var(--muted2);
  font-size: 0.85em;
  font-weight: 500;
  margin-left: auto; /* 推到右侧 */
  white-space: nowrap;
  flex-shrink: 0;
}

.email-actions{
  display: flex;
  gap: 8px;
  opacity: 0;
  transition: var(--transition);
}

.email-item:hover .email-actions{ opacity: 1; }

.email-sender{
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
}

.sender-icon, .time-icon, .subject-icon{
  font-size: 14px;
  opacity: 0.8;
}

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

.email-content{
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  gap: 8px;
}

.email-main{
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.email-subject{
  font-weight: 700;
  font-size: 15px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.email-preview{
  color: var(--text-light);
  font-size: 13px;
  line-height: 1.4;
  display: block; /* 配合左对齐布局，避免高度不一导致错位 */
  word-break: break-word;
  overflow-wrap: anywhere;
}

/* 列表三行布局：发件人/主题/内容 - 与meta区域对齐 */
.email-line{ 
  display: grid; 
  grid-template-columns: 52px 1fr; /* 与email-meta的第一列和第二列宽度对应 */
  align-items: center; 
  gap: 8px; 
  margin: 1px 0; 
  min-width: 0; 
}
.label-chip{ 
  width: 52px; 
  justify-self: start; 
  text-align: center; 
  padding: 1px 6px; 
  font-size: 11px; 
  color: var(--text-light); 
  background: var(--card-glass); 
  border: 1px solid var(--border-glass); 
  border-radius: 999px;
  white-space: nowrap;
  flex-shrink: 0;
}
.value-text{ 
  min-width: 0; 
  overflow: hidden; 
  text-overflow: ellipsis;
  word-break: break-word; /* 允许长单词换行 */
}
.value-text.from{ color: var(--text); font-weight: 600; }
.value-text.subject{ 
  color: var(--text); 
  font-weight: 700; 
  white-space: nowrap; /* 主题保持单行 */
}
/* 内容预览允许多行显示 */
.email-preview.value-text{
  white-space: normal;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2; /* 最多显示2行 */
  -webkit-box-orient: vertical;
  overflow: hidden;
}