/**
 * CSG Select - 通用美化选择器组件
 * 业务无关，支持搜索、自定义内容、多种主题和尺寸
 */

/* 基础选择器容器 */
.csg-select {
    position: relative;
    display: inline-block;
    width: 100%;
    vertical-align: middle;
    /* 定义基础变量 */
    --select-height: 2.375rem;
    --select-padding-x: 0.75rem;
    --select-padding-y: 0.5rem;
    --select-border-radius: 0.375rem;
    --select-border-width: 1px;
    --select-font-size: 1rem;
    --select-line-height: 1.5;
}

/* 隐藏原生select */
.csg-select-input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
    margin: 0;
    padding: 0;
    border: none;
    outline: none;
}

/* 选择器显示区域 */
.csg-select-display {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: #ffffff;
    border: var(--select-border-width) solid #ced4da;
    border-radius: var(--select-border-radius);
    position: relative;
    cursor: pointer;
    transition: all 0.15s ease-in-out;
    overflow: hidden;
    font-size: var(--select-font-size);
    line-height: var(--select-line-height);
    color: #212529;
    user-select: none;
    min-height: var(--select-height);
    padding: var(--select-padding-y) var(--select-padding-x);
    padding-right: 2rem;
}

/* 固定宽度模式 */
.csg-select-fixed-width .csg-select-display {
    width: auto;
    min-width: 120px; /* 基础最小宽度 */
    flex: none; /* 防止 flex 影响宽度 */
}

/* 选择器文本 */
.csg-select-text {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: #6c757d;
}

.csg-select-text.has-value {
    color: #212529;
}

/* 下拉箭头 */
.csg-select-arrow {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 0.3rem solid transparent;
    border-right: 0.3rem solid transparent;
    border-top: 0.3rem solid #6c757d;
    transition: transform 0.15s ease-in-out;
    pointer-events: none;
}

.csg-select.open .csg-select-arrow {
    transform: translateY(-50%) rotate(180deg);
}

/* 下拉选项容器 */
.csg-select-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #ffffff;
    border: var(--select-border-width) solid #ced4da;
    border-top: none;
    border-radius: 0 0 var(--select-border-radius) var(--select-border-radius);
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    z-index: 1000;
    max-height: 15rem;
    overflow-y: auto;
    display: none;
}

.csg-select.open .csg-select-dropdown {
    display: block;
}

/* 搜索框 */
.csg-select-search {
    padding: 0.5rem;
    border-bottom: 1px solid #dee2e6;
    background: #f8f9fa;
}

.csg-select-search-input {
    width: 100%;
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
    line-height: 1.5;
    color: #495057;
    background-color: #ffffff;
    border: 1px solid #ced4da;
    border-radius: 0.25rem;
    outline: none;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.csg-select-search-input:focus {
    border-color: #80bdff;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

/* 选项列表 */
.csg-select-options {
    max-height: 12rem;
    overflow-y: auto;
}

/* 无滚动条模式 */
.csg-select-no-scroll .csg-select-options {
    max-height: none;
    overflow-y: visible;
}

.csg-select-no-scroll {
    max-height: none !important;
    overflow-y: visible !important;
}

/* 选项项 */
.csg-select-option {
    display: flex;
    align-items: center;
    padding: 0.5rem 0.75rem;
    cursor: pointer;
    transition: background-color 0.15s ease-in-out;
    border-bottom: 1px solid #f8f9fa;
    font-size: 0.875rem;
    line-height: 1.4;
}

.csg-select-option:last-child {
    border-bottom: none;
}

.csg-select-option:hover {
    background-color: #f8f9fa;
}

.csg-select-option.selected {
    background-color: #e3f2fd;
    color: #1976d2;
    font-weight: 500;
}

.csg-select-option.highlighted {
    background-color: #e9ecef;
}

/* 选项文本 */
.csg-select-option-text {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 选项颜色类 */
.csg-select-option-success,
.csg-select-option-text-success {
    color: #198754;
}

.csg-select-option-danger,
.csg-select-option-text-danger {
    color: #dc3545;
}

.csg-select-option-warning,
.csg-select-option-text-warning {
    color: #ffc107;
}

.csg-select-option-info,
.csg-select-option-text-info {
    color: #0dcaf0;
}

.csg-select-option-secondary,
.csg-select-option-text-secondary {
    color: #6c757d;
}

/* 选中文本的颜色类 */
.csg-select-text-success {
    color: #198754;
}

.csg-select-text-danger {
    color: #dc3545;
}

.csg-select-text-warning {
    color: #ffc107;
}

.csg-select-text-info {
    color: #0dcaf0;
}

.csg-select-text-secondary {
    color: #6c757d;
}

.csg-select-option-subtitle {
    font-size: 0.75rem;
    color: #6c757d;
    margin-left: 0.5rem;
    opacity: 0.8;
}

/* 自定义输入选项 */
.csg-select-option.custom {
    background-color: #fff3cd;
    border-left: 3px solid #ffc107;
    font-style: italic;
}

.csg-select-option.custom:hover {
    background-color: #ffeaa7;
}

/* 无结果提示 */
.csg-select-no-results {
    padding: 0.75rem;
    text-align: center;
    color: #6c757d;
    font-size: 0.875rem;
    font-style: italic;
}

/* 尺寸变体 */
.csg-select-sm {
    --select-height: 1.875rem;
    --select-padding-x: 0.5rem;
    --select-padding-y: 0.375rem;
    --select-font-size: 0.875rem;
}

.csg-select-lg {
    --select-height: 2.875rem;
    --select-padding-x: 1rem;
    --select-padding-y: 0.625rem;
    --select-font-size: 1.125rem;
}

/* 主题变体 */
.csg-select-primary .csg-select-display {
    border-color: #0d6efd;
}

.csg-select-primary .csg-select-display:focus {
    border-color: #0d6efd;
    box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.25);
}

.csg-select-success .csg-select-display {
    border-color: #198754;
}

.csg-select-success .csg-select-display:focus {
    border-color: #198754;
    box-shadow: 0 0 0 0.2rem rgba(25, 135, 84, 0.25);
}

.csg-select-warning .csg-select-display {
    border-color: #ffc107;
}

.csg-select-warning .csg-select-display:focus {
    border-color: #ffc107;
    box-shadow: 0 0 0 0.2rem rgba(255, 193, 7, 0.25);
}

.csg-select-danger .csg-select-display {
    border-color: #dc3545;
}

.csg-select-danger .csg-select-display:focus {
    border-color: #dc3545;
    box-shadow: 0 0 0 0.2rem rgba(220, 53, 69, 0.25);
}

/* 状态变体 */
.csg-select.is-invalid .csg-select-display {
    border-color: #dc3545;
}

.csg-select.is-valid .csg-select-display {
    border-color: #198754;
}

.csg-select:disabled .csg-select-display {
    background-color: #e9ecef;
    opacity: 1;
    cursor: not-allowed;
}

.csg-select:disabled .csg-select-text {
    color: #6c757d;
}

/* 响应式设计 */
@media (max-width: 576px) {
    .csg-select-dropdown {
        max-height: 12rem;
    }
    
    .csg-select-options {
        max-height: 9rem;
    }
}

/* 动画效果 */
@keyframes csg-select-fadeIn {
    from {
        opacity: 0;
        transform: translateY(-0.5rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.csg-select-dropdown {
    animation: csg-select-fadeIn 0.15s ease-out;
}

/* 滚动条样式 */
.csg-select-options::-webkit-scrollbar {
    width: 6px;
}

.csg-select-options::-webkit-scrollbar-track {
    background: #f1f1f1;
}

.csg-select-options::-webkit-scrollbar-thumb {
    background: #c1c1c1;
    border-radius: 3px;
}

.csg-select-options::-webkit-scrollbar-thumb:hover {
    background: #a8a8a8;
}