/* 导航首页按功能分区展示入口，颜色继承现有浅色和深色主题。 */
body[data-view="navigation"],
body[data-view="navigation"] .lab-shell {
    min-width: 0;
}

.navigation-content {
    width: 100%;
    max-width: 1440px;
    margin: 0 auto;
}

.navigation-section + .navigation-section {
    margin-top: 32px;
}

.navigation-section > h2 {
    margin-bottom: 16px;
    font-size: 18px;
    font-weight: 700;
}

/* 三列入口在窄窗口自动减为两列或单列，长英文可换行而不会撑开页面。 */
.navigation-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.navigation-card {
    display: flex;
    min-width: 0;
    min-height: 176px;
    flex-direction: column;
    gap: 16px;
    padding: 24px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    background: var(--color-surface);
    color: var(--color-text);
    text-decoration: none;
    overflow-wrap: anywhere;
    box-shadow: var(--shadow-sm);
    transition: border-color 0.16s ease, background-color 0.16s ease;
}

.navigation-card:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-soft);
}

.navigation-card:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 3px;
}

.navigation-card-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.navigation-card-title h3 {
    min-width: 0;
    font-size: 18px;
    line-height: 1.5;
}

.navigation-card-title > span {
    flex: 0 0 24px;
    color: var(--color-primary);
    font-size: 24px;
    line-height: 1;
    text-align: center;
}

.navigation-card p {
    color: var(--color-muted);
    line-height: 1.8;
}

.navigation-card-admin {
    min-height: 0;
}

@media (max-width: 1100px) {
    .navigation-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 16px;
    }
}

/* 手机保留可收起的侧栏，首页内容单列排列并在内容区域内纵向滚动。 */
@media (max-width: 700px) {
    body[data-view="navigation"] .lab-shell {
        grid-template-columns: 164px minmax(0, 1fr);
    }

    body[data-view="navigation"] .lab-shell.sidebar-collapsed {
        grid-template-columns: 0 minmax(0, 1fr);
    }

    body[data-view="navigation"] .lab-brand {
        flex-wrap: wrap;
    }

    body[data-view="navigation"] .lab-brand-name {
        font-size: 22px;
    }

    body[data-view="navigation"] .module-header {
        padding: 16px;
    }

    body[data-view="navigation"] .module-header-start h1 {
        font-size: 20px;
        overflow-wrap: anywhere;
    }

    body[data-view="navigation"] .module-actions {
        flex-wrap: wrap;
        min-width: 0;
    }

    .navigation-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .navigation-card {
        min-height: 0;
        padding: 20px 16px;
    }
}

@media (prefers-reduced-motion: reduce) {
    .navigation-card {
        transition: none;
    }
}