/**
 * 赵老师智学网 - 前台样式
 * 优先复用子比主题 CSS 变量，自动适配亮色 / 暗色（body.dark-theme）
 */

/* ---------- 面板与导航 ---------- */
.zx-panel {
    background: var(--main-bg-color, #fff);
    border: 1px solid var(--main-border-color, #eee);
    border-radius: var(--main-radius, 8px);
    padding: 15px;
    margin-bottom: 10px;
}

.zx-panel-title {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 16px;
    font-weight: 600;
    color: var(--key-color, #333);
    margin-bottom: 12px;
}

.zx-panel-title .fa {
    color: var(--theme-color, #2196f3);
}

.zx-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.zx-chip {
    display: inline-block;
    border: 1px solid var(--main-border-color, #eee);
    background: var(--muted-bg-color, #f6f6f6);
    color: var(--main-color, #333);
    padding: 5px 14px;
    border-radius: 999px;
    cursor: pointer;
    font-size: 14px;
    line-height: 1.6;
    text-decoration: none;
    transition: all .12s;
    user-select: none;
}

.zx-chip:hover {
    border-color: var(--theme-color, #2196f3);
    color: var(--theme-color, #2196f3);
}

.zx-chip.active {
    background: var(--theme-color, #2196f3);
    border-color: var(--theme-color, #2196f3);
    color: #fff;
}

.zx-hint-text {
    color: var(--muted-2-color, #999);
    font-size: 13px;
    margin-top: 10px;
}

/* ---------- 章节树 ---------- */
.zx-chapter-tree {
    min-height: 30px;
}

.zx-tree-ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.zx-tree-sub {
    padding-left: 22px;
}

.zx-tree-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 7px 10px;
    border-radius: var(--main-radius, 8px);
    cursor: pointer;
    color: var(--main-color, #333);
    font-size: 14px;
    user-select: none;
}

.zx-tree-item:hover {
    background: var(--muted-bg-color, #f6f6f6);
}

.zx-tree-item.active {
    background: var(--focus-color, #e8f4ff);
    color: var(--theme-color, #2196f3);
}

.zx-tree-arrow {
    width: 14px;
    text-align: center;
    color: var(--muted-2-color, #999);
    flex-shrink: 0;
}

.zx-tree-arrow .fa {
    transition: transform .15s;
}

.zx-tree-dot {
    width: 5px;
    height: 5px;
    margin: 0 4px;
    border-radius: 50%;
    background: var(--muted-4-color, #ddd);
    flex-shrink: 0;
}

/* ---------- 列表页 ---------- */
.zx-crumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 10px;
}

.zx-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 10px;
}

.zx-card {
    display: block;
    background: var(--main-bg-color, #fff);
    border: 1px solid var(--main-border-color, #eee);
    border-radius: var(--main-radius, 8px);
    padding: 15px;
    color: var(--main-color, #333);
    text-decoration: none;
    transition: all .15s;
}

.zx-card:hover {
    box-shadow: var(--main-shadow, 0 2px 12px rgba(0, 0, 0, .08));
    transform: translateY(-2px);
    color: var(--main-color, #333);
}

.zx-card-title {
    font-weight: 600;
    color: var(--key-color, #333);
    margin-bottom: 6px;
    font-size: 15px;
    line-height: 1.5;
}

.zx-card-desc {
    font-size: 13px;
    color: var(--muted-2-color, #999);
    line-height: 1.6;
    margin-bottom: 10px;
}

.zx-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
    color: var(--muted-2-color, #999);
}

.zx-badge {
    display: inline-block;
    padding: 1px 8px;
    border-radius: 4px;
    font-size: 12px;
    background: var(--focus-color, #e8f4ff);
    color: var(--theme-color, #2196f3);
}

.zx-pager {
    margin-top: 15px;
}

.zx-pager ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    padding: 0;
    margin: 0;
}

.zx-pager .page-numbers {
    display: inline-block;
    padding: 5px 12px;
    border: 1px solid var(--main-border-color, #eee);
    border-radius: var(--main-radius, 8px);
    color: var(--main-color, #333);
    background: var(--main-bg-color, #fff);
    font-size: 13px;
}

.zx-pager .page-numbers.current {
    background: var(--theme-color, #2196f3);
    border-color: var(--theme-color, #2196f3);
    color: #fff;
}

/* ---------- 受保护阅读器 ---------- */
.zx-viewer {
    margin-top: 15px;
    background: var(--main-bg-color, #fff);
    border: 1px solid var(--main-border-color, #eee);
    border-radius: var(--main-radius, 8px);
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
}

.zx-viewer-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    padding: 10px 15px;
    border-bottom: 1px solid var(--main-border-color, #eee);
}

.zx-viewer-head-l {
    display: flex;
    align-items: center;
    gap: 8px;
}

.zx-viewer-badge {
    background: var(--theme-color, #2196f3);
    color: #fff;
    border-radius: 4px;
    padding: 1px 8px;
    font-size: 12px;
    font-weight: 600;
}

.zx-viewer-title {
    font-weight: 600;
    color: var(--key-color, #333);
}

.zx-viewer-pageinfo {
    font-size: 13px;
    color: var(--muted-2-color, #999);
}

.zx-viewer-head-r {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.zx-btn {
    border: 1px solid var(--main-border-color, #eee);
    background: var(--muted-bg-color, #f6f6f6);
    color: var(--main-color, #333);
    border-radius: var(--main-radius, 8px);
    padding: 4px 12px;
    font-size: 13px;
    line-height: 1.6;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all .12s;
}

.zx-btn:hover {
    color: var(--theme-color, #2196f3);
    border-color: var(--theme-color, #2196f3);
}

.zx-btn-pay {
    background: var(--theme-color, #2196f3);
    border-color: var(--theme-color, #2196f3);
    color: #fff;
    padding: 6px 22px;
}

.zx-btn-pay:hover {
    color: #fff;
    opacity: .9;
}

.zx-viewer-body {
    position: relative;
    background: var(--muted-bg-color, #f5f5f5);
    min-height: 320px;
}

.zx-viewer-stage {
    display: none;
    padding: 15px;
    overflow: auto;
    text-align: center;
}

.zx-viewer-canvas {
    max-width: 100%;
    height: auto !important;
    box-shadow: 0 2px 12px rgba(0, 0, 0, .15);
    background: #fff;
}

.zx-viewer-loading {
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: var(--muted-2-color, #999);
}

.zx-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--main-border-color, #ddd);
    border-top-color: var(--theme-color, #2196f3);
    border-radius: 50%;
    display: inline-block;
    animation: zx-spin .8s linear infinite;
}

@keyframes zx-spin {
    to {
        transform: rotate(360deg);
    }
}

.zx-viewer-lock {
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    background: rgba(255, 255, 255, .94);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3;
}

body.dark-theme .zx-viewer-lock {
    background: rgba(20, 20, 20, .94);
}

.zx-lock-inner {
    text-align: center;
    padding: 20px;
}

.zx-lock-box {
    margin-top: 15px;
    padding: 30px 15px;
    text-align: center;
}

/* ---------- 小组件导航 ---------- */
.zx-widget-nav .zx-chips {
    gap: 6px;
}

.zx-wg-label {
    font-size: 13px;
    color: var(--muted-2-color, #999);
    margin: 10px 0 6px;
}

.zx-wg-label:first-child {
    margin-top: 0;
}

.zx-wg-select {
    width: 100%;
    padding: 6px 10px;
    border: 1px solid var(--main-border-color, #eee);
    border-radius: var(--main-radius, 8px);
    background: var(--muted-bg-color, #f6f6f6);
    color: var(--main-color, #333);
    font-size: 14px;
    outline: none;
}

.zx-wg-select:focus {
    border-color: var(--theme-color, #2196f3);
}

.zx-wg-go {
    width: 100%;
    margin-top: 12px;
    background: var(--theme-color, #2196f3);
    border-color: var(--theme-color, #2196f3);
    color: #fff;
}

.zx-wg-go:hover {
    color: #fff;
    opacity: .9;
}

/* ---------- 打印 ---------- */
#zx-print-root {
    display: none;
}

@media print {
    @page {
        margin: 8mm;
    }

    body.zx-printing *:not(#zx-print-root):not(#zx-print-root *) {
        visibility: hidden !important;
    }

    body.zx-printing #zx-print-root {
        display: block !important;
        position: absolute;
        left: 0;
        top: 0;
        width: 100%;
    }

    body.zx-printing #zx-print-root * {
        visibility: visible !important;
    }

    #zx-print-root img {
        width: 100%;
        break-after: page;
        page-break-after: always;
    }
}