/* ==========================================================================
 * train_system 手机端样式覆盖
 * 设计原则：桌面端零回归。所有规则只在两种条件下生效：
 *   1) @media (max-width: 768px) —— 窄屏触发
 *   2) html.is-mobile / body.is-mobile —— device.js 给宽屏 + 移动 UA 兜底
 * 仿照 office_tool 的 mobile-adaptation-guide.md。
 * ========================================================================== */


/* ---------- 顶栏折叠按钮：桌面端默认隐藏（device.js 注入在 .header 内） ----------
 * 桌面端用 display:none 完全隐藏，不参与 flex 布局；
 * 手机端在 @media / body.is-mobile 块里把它显示出来。 */
.mobile-header-toggle {
    display: none !important;
}

.mobile-header-toggle-label {
    margin-left: 4px;
    font-size: 12px;
    font-weight: 600;
    line-height: 1;
}


/* ============ 第一块：窄屏触发 ============ */
@media (max-width: 768px) {

    html, body {
        -webkit-text-size-adjust: 100%;
        overflow-x: hidden;
    }

    body {
        font-size: 15px;
        padding: 8px !important;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    /* ---------- 顶栏 / Header（手机端默认折叠，点折叠按钮 / 标题展开） ---------- */
    .header {
        padding: 10px 12px !important;
        margin-bottom: 12px;
        border-radius: 10px;
        gap: 8px;
        align-items: center;
        flex-wrap: wrap;
        transition: padding 0.25s ease;
    }

    /* 标题在手机端可点击 */
    .header h1 {
        cursor: pointer;
    }

    /* 折叠按钮：作为 flex 项靠右，不再 absolute，确保肯定可见可点 */
    .mobile-header-toggle {
        display: inline-flex !important;
        align-items: center;
        justify-content: center;
        margin-left: auto;
        padding: 6px 10px;
        height: 32px;
        border-radius: 16px;
        border: 1px solid #d1d5db;
        background: linear-gradient(135deg, #eef2ff 0%, #ffffff 100%);
        color: #4f46e5;
        cursor: pointer;
        line-height: 1;
        z-index: 5;
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
        flex: 0 0 auto;
        order: 99;  /* 确保始终在 header 右端 */
    }

    .mobile-header-toggle:active {
        transform: scale(0.96);
    }

    .mobile-header-toggle svg {
        flex: 0 0 auto;
        display: block;
    }

    /* 收起态：紧凑 padding，隐藏标题 + 折叠按钮以外的所有直接子元素 */
    .header.mobile-header-collapsed {
        padding-top: 8px !important;
        padding-bottom: 8px !important;
        margin-bottom: 8px;
    }

    .header.mobile-header-collapsed > .user-info,
    .header.mobile-header-collapsed > .language-switcher,
    .header.mobile-header-collapsed > .admin-theme-switcher,
    .header.mobile-header-collapsed > button:not(.mobile-header-toggle),
    .header.mobile-header-collapsed > .btn {
        display: none !important;
    }

    .header.mobile-header-collapsed h1 {
        font-size: 15px !important;
        margin: 0 !important;
    }

    .header h1 {
        font-size: 17px !important;
        line-height: 1.3;
        margin: 0;
    }

    .header .page-title,
    .header .header-title-group {
        gap: 8px;
    }

    .header .user-info {
        gap: 8px;
        flex-wrap: wrap;
        justify-content: flex-end;
        align-items: center;
        margin-left: auto;
    }

    .header .user-info span,
    .header .user-info strong {
        font-size: 13px;
    }

    /* ---------- 通用按钮：手机端缩小、按内容宽度，不轻易独占行 ---------- */
    .btn {
        padding: 7px 12px;
        font-size: 13px;
        border-radius: 6px;
    }

    .header .btn,
    .header .user-info .btn,
    .nav-menu .btn,
    .nav-menu a {
        width: auto;
        flex: 0 0 auto;
    }

    /* ---------- 卡片 ---------- */
    .card {
        padding: 14px !important;
        border-radius: 10px;
        margin-bottom: 12px;
    }

    .card h2,
    .card h3 {
        font-size: 16px !important;
    }

    /* ---------- 一级 / 二级导航 (.nav-menu / .admin-sub-nav) ----------
       注意：不要写 `display: flex !important`！
       admin.html / student.html 里的二级菜单默认 inline `style="display: none"`，
       由 JS 在切换一级时改成 'flex' 显示。如果加 !important 会把全部菜单展开。
       桌面端 base.html 已经有 `.nav-menu { display: flex; gap: 10px }`，
       手机端只需补齐 wrap 等布局属性即可。 */
    .nav-menu {
        flex-wrap: wrap;
        align-items: center;
        gap: 6px;
        margin-bottom: 10px;
        overflow-x: visible;
    }

    .nav-menu a {
        padding: 6px 10px !important;
        font-size: 12.5px;
        line-height: 1.3;
        border-radius: 14px;
        white-space: nowrap;
        flex: 0 0 auto;
        width: auto;
    }

    .nav-menu.admin-sub-nav {
        margin-top: 0;
        margin-bottom: 8px;
        padding: 4px;
        background: rgba(255, 255, 255, 0.55);
        border-radius: 10px;
    }

    /* ---------- 主入口卡片栅格（首页大六/七宫格） ----------
       桌面端是 grid 大卡，手机端拍成横向 wrap 的「按钮组」：
       - 容器从 grid 改成 flex wrap
       - 每个 .card 变 pill，按内容宽度
       - 隐藏图标 div / 描述 p，只保留标题文字（h2/h3）当按钮 label */
    #mainNavCards,
    #adminMainCards {
        display: flex !important;
        flex-direction: row !important;
        flex-wrap: wrap !important;
        grid-template-columns: none !important;
        gap: 6px !important;
        margin-bottom: 10px !important;
        padding: 4px;
        background: rgba(255, 255, 255, 0.55);
        border-radius: 10px;
    }

    #mainNavCards > .card,
    #adminMainCards > .card {
        width: auto !important;
        flex: 0 0 auto !important;
        display: inline-flex !important;
        align-items: center !important;
        justify-content: center !important;
        padding: 6px 12px !important;
        margin: 0 !important;
        border-radius: 16px !important;
        border-width: 1px !important;
        background: rgba(255, 255, 255, 0.92);
        box-shadow: none !important;
        transform: none !important;
        min-height: 0;
        line-height: 1.2;
        text-align: center;
    }

    /* 主入口卡片里的 emoji 图标 div（用内联 font-size 标识） */
    #mainNavCards > .card > div[style*="font-size"],
    #adminMainCards > .card > div[style*="font-size"] {
        display: none !important;
    }

    /* 主入口卡片里的描述 p（含 admin/student-module-desc） */
    #mainNavCards > .card > p,
    #adminMainCards > .card > p,
    #mainNavCards .admin-module-desc,
    #adminMainCards .admin-module-desc,
    #mainNavCards .student-module-desc,
    #adminMainCards .student-module-desc {
        display: none !important;
    }

    /* 主入口卡片标题：作为按钮文字 */
    #mainNavCards > .card h2,
    #mainNavCards > .card h3,
    #adminMainCards > .card h2,
    #adminMainCards > .card h3,
    #mainNavCards .admin-module-title,
    #adminMainCards .admin-module-title,
    #mainNavCards .student-module-title,
    #adminMainCards .student-module-title {
        font-size: 13px !important;
        margin: 0 !important;
        padding: 0 !important;
        line-height: 1.2 !important;
        font-weight: 600 !important;
        white-space: nowrap;
    }

    /* 选中态：颜色更明显（保留 module-color 变量）*/
    #adminMainCards > .card.active,
    #mainNavCards > .card.active {
        background: var(--module-color, #6f42c1) !important;
        border-color: var(--module-color, #6f42c1) !important;
    }

    #adminMainCards > .card.active h2,
    #adminMainCards > .card.active h3,
    #mainNavCards > .card.active h2,
    #mainNavCards > .card.active h3 {
        color: #fff !important;
    }

    /* ---------- 首页 landing-hero（index.html） ---------- */
    .landing-hero {
        padding: 36px 18px !important;
        border-radius: 14px;
    }

    .landing-hero h1 {
        font-size: 28px !important;
        letter-spacing: -0.5px;
        margin-bottom: 10px !important;
    }

    .landing-hero .subtitle {
        font-size: 14px !important;
        margin-bottom: 24px !important;
        letter-spacing: 0.5px !important;
    }

    .hero-cta {
        font-size: 15px !important;
        padding: 12px 28px !important;
    }

    .modules-grid {
        grid-template-columns: 1fr !important;
        gap: 14px !important;
        margin-top: 32px !important;
    }

    .module-card {
        padding: 22px 18px !important;
        border-radius: 14px;
    }

    .module-icon {
        width: 56px !important;
        height: 56px !important;
        font-size: 26px !important;
        margin-bottom: 14px !important;
    }

    .module-card h3 {
        font-size: 17px !important;
    }

    .module-card p {
        font-size: 13px !important;
    }

    .footer-stats {
        flex-wrap: wrap;
        gap: 18px !important;
        margin-top: 28px !important;
        padding: 18px 0 !important;
    }

    .stat-value {
        font-size: 22px !important;
    }

    /* ---------- 表单 ---------- */
    .form-group {
        margin-bottom: 14px;
    }

    .form-group label {
        font-size: 13px;
    }

    .form-group input,
    .form-group textarea,
    .form-group select,
    input[type="text"],
    input[type="number"],
    input[type="password"],
    input[type="email"],
    input[type="tel"],
    input[type="search"],
    input[type="date"],
    input[type="time"],
    input[type="datetime-local"],
    textarea,
    select {
        width: 100%;
        min-height: 38px;
        font-size: 16px !important; /* iOS Safari < 16px 会自动缩放页面 */
        padding: 8px 10px;
        box-sizing: border-box;
    }

    /* 手机上的原生下拉列表在 Android WebView 中会继承控件字号和行高，
       因此仅在 Android 上进一步压缩，避免影响 iOS 的输入缩放策略。 */
    .form-group select,
    select {
        min-height: 32px;
        padding-top: 4px;
        padding-bottom: 4px;
        line-height: 1.1;
    }

    .form-group select option,
    select option {
        font-size: 14px;
        line-height: 1.05;
    }

    html.is-android .form-group select,
    html.is-android select,
    body.is-android .form-group select,
    body.is-android select {
        font-size: 14px !important;
        min-height: 30px;
        padding-top: 3px;
        padding-bottom: 3px;
        line-height: 1;
    }

    html.is-android .form-group select option,
    html.is-android select option,
    body.is-android .form-group select option,
    body.is-android select option {
        font-size: 13px;
        line-height: 1;
    }

    textarea,
    .form-group textarea {
        min-height: 90px;
    }

    input[type="range"] {
        width: 100%;
    }

    /* ---------- 表格：横向滚动而不是挤成一坨 ---------- */
    .card table,
    .container table,
    main table {
        display: block;
        overflow-x: auto;
        width: 100%;
        -webkit-overflow-scrolling: touch;
        white-space: nowrap;
    }

    .card table th,
    .card table td {
        padding: 8px 10px;
        font-size: 13px;
    }

    /* ---------- 提示条 ---------- */
    #alert-container {
        top: 10px;
        width: calc(100% - 20px);
    }

    .alert {
        padding: 10px 12px;
        font-size: 13px;
        border-radius: 8px;
    }

    /* ---------- 模态框 / 弹窗（包括内联样式的 modal） ---------- */
    .modal-panel,
    .ones-editor-modal-panel,
    .standard-richtext-modal-panel,
    div[class*="modal"][class*="panel"],
    div[id$="Modal"] > div[style*="background"],
    div[id$="Modal"] > div[style*="width"] {
        width: calc(100vw - 20px) !important;
        max-width: calc(100vw - 20px) !important;
        max-height: calc(100vh - 24px) !important;
        margin: 12px auto !important;
        border-radius: 12px !important;
        box-sizing: border-box;
        overflow-y: auto;
    }

    /* ---------- 题目富文本 / 图片 / 视频限宽 ---------- */
    .question-rich-content img,
    .question-stem-content img,
    .question-stem-media img,
    .card img:not(.no-mobile-shrink) {
        max-width: 100% !important;
        height: auto !important;
    }

    .card video,
    .question-rich-content video {
        max-width: 100% !important;
        height: auto !important;
    }

    /* ---------- 语言切换器 ---------- */
    .language-switcher {
        margin-left: 4px;
    }

    .language-switcher__select {
        min-width: 88px;
        height: 32px;
        font-size: 12px;
        padding: 0 26px 0 8px;
    }
}


/* ============ 第二块：JS 标记类触发（兜底）============
 * 给「宽屏 + 移动 UA」（横屏手机/折叠屏/平板）使用，
 * 只复制最关键的「布局骨架级」override，字体微调省略。
 * ============ */

body.is-mobile {
    font-size: 15px;
    padding: 8px !important;
}

body.is-mobile .container {
    max-width: 100%;
    padding: 0;
}

body.is-mobile .header {
    padding: 10px 12px !important;
    gap: 8px;
    flex-wrap: wrap;
    transition: padding 0.25s ease;
}

body.is-mobile .header h1 {
    font-size: 17px !important;
    cursor: pointer;
}

body.is-mobile .header .user-info {
    gap: 8px;
    flex-wrap: wrap;
    justify-content: flex-end;
    margin-left: auto;
}

body.is-mobile .mobile-header-toggle {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    margin-left: auto;
    padding: 6px 10px;
    height: 32px;
    border-radius: 16px;
    border: 1px solid #d1d5db;
    background: linear-gradient(135deg, #eef2ff 0%, #ffffff 100%);
    color: #4f46e5;
    cursor: pointer;
    line-height: 1;
    z-index: 5;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    flex: 0 0 auto;
    order: 99;
}

body.is-mobile .mobile-header-toggle:active {
    transform: scale(0.96);
}

body.is-mobile .mobile-header-toggle svg {
    flex: 0 0 auto;
    display: block;
}

body.is-mobile .header.mobile-header-collapsed {
    padding-top: 8px !important;
    padding-bottom: 8px !important;
    margin-bottom: 8px;
}

body.is-mobile .header.mobile-header-collapsed > .user-info,
body.is-mobile .header.mobile-header-collapsed > .language-switcher,
body.is-mobile .header.mobile-header-collapsed > .admin-theme-switcher,
body.is-mobile .header.mobile-header-collapsed > button:not(.mobile-header-toggle),
body.is-mobile .header.mobile-header-collapsed > .btn {
    display: none !important;
}

body.is-mobile .header.mobile-header-collapsed h1 {
    font-size: 15px !important;
    margin: 0 !important;
}

body.is-mobile .card {
    padding: 14px !important;
}

body.is-mobile .nav-menu {
    /* 同上：不要强制 display，让 inline `style="display:none"` 控制显示/隐藏 */
    flex-wrap: wrap;
    gap: 6px;
    overflow-x: visible;
}

body.is-mobile .nav-menu a {
    width: auto;
    flex: 0 0 auto;
    padding: 6px 10px !important;
    font-size: 12.5px;
    border-radius: 14px;
    white-space: nowrap;
}

body.is-mobile #mainNavCards,
body.is-mobile #adminMainCards {
    display: flex !important;
    flex-wrap: wrap !important;
    grid-template-columns: none !important;
    gap: 6px !important;
    padding: 4px;
    background: rgba(255, 255, 255, 0.55);
    border-radius: 10px;
}

body.is-mobile #mainNavCards > .card,
body.is-mobile #adminMainCards > .card {
    width: auto !important;
    flex: 0 0 auto !important;
    display: inline-flex !important;
    align-items: center !important;
    padding: 6px 12px !important;
    margin: 0 !important;
    border-radius: 16px !important;
    box-shadow: none !important;
    transform: none !important;
    line-height: 1.2;
}

body.is-mobile #mainNavCards > .card > div[style*="font-size"],
body.is-mobile #adminMainCards > .card > div[style*="font-size"],
body.is-mobile #mainNavCards > .card > p,
body.is-mobile #adminMainCards > .card > p,
body.is-mobile #mainNavCards .admin-module-desc,
body.is-mobile #adminMainCards .admin-module-desc,
body.is-mobile #mainNavCards .student-module-desc,
body.is-mobile #adminMainCards .student-module-desc {
    display: none !important;
}

body.is-mobile #mainNavCards > .card h2,
body.is-mobile #mainNavCards > .card h3,
body.is-mobile #adminMainCards > .card h2,
body.is-mobile #adminMainCards > .card h3,
body.is-mobile #mainNavCards .admin-module-title,
body.is-mobile #adminMainCards .admin-module-title,
body.is-mobile #mainNavCards .student-module-title,
body.is-mobile #adminMainCards .student-module-title {
    font-size: 13px !important;
    margin: 0 !important;
    padding: 0 !important;
    font-weight: 600 !important;
    white-space: nowrap;
    line-height: 1.2 !important;
}

body.is-mobile .modules-grid {
    grid-template-columns: 1fr !important;
}

body.is-mobile .card table,
body.is-mobile .container table,
body.is-mobile main table {
    display: block;
    overflow-x: auto;
    width: 100%;
    -webkit-overflow-scrolling: touch;
}

body.is-mobile input[type="text"],
body.is-mobile input[type="number"],
body.is-mobile input[type="password"],
body.is-mobile input[type="email"],
body.is-mobile input[type="tel"],
body.is-mobile input[type="search"],
body.is-mobile input[type="date"],
body.is-mobile input[type="time"],
body.is-mobile input[type="datetime-local"],
body.is-mobile textarea,
body.is-mobile select {
    width: 100%;
    min-height: 38px;
    font-size: 16px !important;
    box-sizing: border-box;
}

body.is-mobile select {
    min-height: 32px;
    padding-top: 4px;
    padding-bottom: 4px;
    line-height: 1.1;
}

body.is-mobile select option {
    font-size: 14px;
    line-height: 1.05;
}

body.is-mobile.is-android select {
    min-height: 30px;
    font-size: 14px !important;
    padding-top: 3px;
    padding-bottom: 3px;
    line-height: 1;
}

body.is-mobile.is-android select option {
    font-size: 13px;
    line-height: 1;
}

body.is-mobile .modal-panel,
body.is-mobile .ones-editor-modal-panel,
body.is-mobile .standard-richtext-modal-panel {
    width: calc(100vw - 20px) !important;
    max-width: calc(100vw - 20px) !important;
    max-height: calc(100vh - 24px) !important;
    margin: 12px auto !important;
    overflow-y: auto;
}