/* mobile.css - 移动端/小屏幕适配 */

/* 全局 AJAX Loading 指示器（全尺寸通用） */
#global-ajax-loading .spinner {
    width: 36px;
    height: 36px;
    border: 3px solid rgba(37, 99, 235, 0.2);
    border-top-color: #2563eb;
    border-radius: 50%;
    animation: spinner-rotate .8s linear infinite;
}

#global-ajax-loading span {
    color: var(--text-secondary);
    font-size: 13px;
}

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

/* ===== 导航收起为汉堡抽屉(手机 + 平板 + 小桌面) =====
   抽屉用 position:absolute(相对 .navbar)而非 fixed:
   .navbar 的 backdrop-filter 会为 fixed 后代创建包含块,把抽屉困在 56px 导航栏内 */
:root { --nav-height: 60px; }

@media (max-width: 1100px) {
    .nav-toggle {
        display: flex;
        flex-direction: column;
        justify-content: center;
        gap: 5px;
        width: 40px;
        height: 40px;
        background: transparent;
        border: none;
        cursor: pointer;
    }

    .nav-toggle span {
        display: block;
        width: 24px;
        height: 2px;
        background: var(--text);
        border-radius: 2px;
        transition: transform .2s, opacity .2s;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        height: calc(100vh - var(--nav-height, 60px));
        height: calc(100dvh - var(--nav-height, 60px)); /* 手机浏览器动态地址栏下更准 */
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        align-items: stretch;
        padding: 16px;
        gap: 4px;
        transform: translateX(100%);
        transition: transform .25s ease;
        z-index: 998;
        overflow-y: auto;
    }

    .nav-links.open {
        display: flex;
        transform: translateX(0);
    }

    .nav-link {
        padding: 12px 8px;
        border-radius: 8px;
    }

    .nav-link:hover {
        background: var(--bg-soft);
    }

    /* 长用户名省略号,防止把顶栏撑宽 */
    .nav-user {
        max-width: 40vw;
        min-width: 0;
        flex-shrink: 1;
    }
    .user-info {
        display: block;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
        max-width: 100%;
    }
    .user-info small { display: none; }
}

@media (max-width: 768px) {
    :root {
        --nav-height: 56px;
    }

    .nav-container {
        padding: 0 12px;
    }

    .nav-brand .brand-text {
        display: none;
    }

    /* nav-user 留在顶栏内,恢复横向排列(旧样式按"抽屉内用户区"设计,纵向会撑破 56px 顶栏) */
    .nav-user {
        flex-direction: row;
        align-items: center;
        gap: var(--space-2);
        margin: 0;
        padding: 0;
        border: none;
    }
    .nav-avatar, .nav-avatar-placeholder { width: 34px; height: 34px; }

    .main-content {
        padding: 16px 12px;
    }

    .card, .se-card, .sw-card, .dashboard-card {
        padding: 16px;
        margin-bottom: 12px;
    }

    .se-type-grid {
        grid-template-columns: repeat(3, 1fr) !important;
        gap: 8px;
    }

    .se-type-chip {
        font-size: 12px;
        padding: 8px 4px;
    }

    .form-row {
        flex-direction: column;
        gap: 12px;
    }

    /* 学生端 hero 统计: 允许换行,避免末项溢出屏幕 */
    .hero .hero-stats {
        flex-wrap: wrap;
        gap: 12px 20px;
    }
    .hero .hero-stat {
        flex: 0 0 auto;
        min-width: 70px;
    }

    .btn-group {
        flex-wrap: wrap;
    }

    .flash-message {
        left: 12px;
        right: 12px;
        top: 12px;
        transform: none;
    }

    .notification-dropdown {
        position: fixed;
        top: var(--nav-height, 56px);
        left: 8px;
        right: 8px;
        width: auto;
    }

    #chat-panel {
        left: 8px;
        right: 8px;
        bottom: 70px;
        width: auto;
    }

    #chat-toggle {
        bottom: 16px;
        right: 16px;
    }
}

/* 平板宽度(769-1100): 宽表格横向滚动,避免右侧被裁掉(此前仅 ≤768 生效) */
@media (max-width: 1100px) {
    table {
        display: block;
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
}

@media (max-width: 480px) {
    .se-type-grid {
        grid-template-columns: repeat(2, 1fr) !important;
    }

    h1, .page-title {
        font-size: 20px;
    }

    .footer {
        font-size: 12px;
        padding: 16px 12px;
    }
}

/* 全局 Loading 指示器样式 */
#global-ajax-loading .spinner {
    width: 36px;
    height: 36px;
    border: 3px solid rgba(37, 99, 235, 0.2);
    border-top-color: #2563eb;
    border-radius: 50%;
    animation: spinner-rotate .8s linear infinite;
}

#global-ajax-loading span {
    color: var(--text-secondary);
    font-size: 13px;
}

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

/* ===== 管理后台移动端:侧边栏抽屉 + 顶部条 ===== */
.admin-mobile-topbar { display: none; }

@media (max-width: 768px) {
    .admin-mobile-topbar {
        display: flex;
        align-items: center;
        gap: 10px;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: 56px;
        padding: 0 12px;
        background: #fff;
        border-bottom: 1px solid var(--border);
        z-index: 950;
    }

    .admin-mobile-menu-btn {
        border: none;
        background: none;
        color: #0f172a;
        width: 38px;
        height: 38px;
        border-radius: 8px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        padding: 0;
    }

    .admin-mobile-menu-btn:hover { background: var(--bg-soft); }
    .admin-mobile-menu-btn svg { width: 22px; height: 22px; }

    .admin-mobile-brand {
        font-weight: 700;
        color: #0f172a;
        font-size: 15px;
        flex: 1;
        min-width: 0;
        white-space: nowrap;
        overflow: hidden;
        text-overflow: ellipsis;
    }

    body.admin-page .main-content {
        margin-left: 0;
        padding: 72px 12px 16px;
    }

    /* 侧边栏变抽屉:宽度固定 260px,忽略桌面折叠态 */
    .admin-sidebar {
        transform: translateX(-100%);
        width: 260px;
    }

    body.sidebar-collapsed .admin-sidebar { width: 260px; }

    .admin-sidebar.open { transform: translateX(0); }

    body.sidebar-collapsed .admin-sidebar .admin-sidebar-brand-text { display: inline; }
    body.sidebar-collapsed .admin-sidebar .admin-sidebar-section-label { display: block; }
    body.sidebar-collapsed .admin-sidebar .admin-sidebar-link-text { display: inline; }
    body.sidebar-collapsed .admin-sidebar .admin-sidebar-link { justify-content: flex-start; padding: 8px 12px; }
    body.sidebar-collapsed .admin-sidebar .admin-sidebar-header { justify-content: flex-start; padding: 0 14px; gap: var(--space-2); }
    body.sidebar-collapsed .admin-sidebar .admin-sidebar-brand { flex: 1; }
    body.sidebar-collapsed .admin-sidebar .admin-sidebar-user-info { display: flex; }
    body.sidebar-collapsed .admin-sidebar .admin-sidebar-user-links { display: flex; }
    body.sidebar-collapsed .admin-sidebar .admin-sidebar-user { justify-content: flex-start; }
    body.sidebar-collapsed .admin-sidebar-footer { align-items: stretch; padding: 10px 8px; }
}