/* 主页样式变量 */
.home-page {
    --home-primary: #165DFF;         /* 主页主色调：深蓝色 */
    --home-secondary: #4080FF;       /* 主页次要色：亮蓝色 */
    --home-tertiary: #E8F3FF;        /* 主页第三色：浅蓝色 */
    --home-success: #2ECC71;         /* 主页成功色：绿色 */
    --home-danger: #E74C3C;          /* 主页危险色：红色 */
    --home-warning: #F39C12;         /* 主页警告色：橙色 */
    --home-dark: #333333;            /* 主页深色文本 */
    --home-light: #FFFFFF;           /* 主页浅色背景 */
    --home-neutral: #F5F7FA;         /* 主页中性色：浅灰色 */
    --home-radius: 12px;             /* 主页圆角半径 */
    --home-shadow: 0 4px 20px rgba(0, 0, 0, 0.08); /* 主页阴影 */
    --home-transition: all 0.3s ease; /* 统一过渡效果 */
}

/* 基础样式 */
.container {
    max-width: 1200px;
    margin: 1rem auto;
    padding: 0 1rem;
}

/* 标签页 */
.home-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    border-bottom: 2px solid #eee;
    padding-bottom: 0;
}

.home-tab-button {
    padding: 0.5rem 1rem;
    cursor: pointer;
    border: none;
    background: transparent;
    border-radius: var(--home-radius) var(--home-radius) 0 0;
    transition: var(--home-transition);
    font-weight: 500;
    color: var(--home-dark);
    font-size: 0.95rem;
    position: relative;
    bottom: -1px;
}

.home-tab-button:hover {
    background: var(--home-tertiary);
    transform: translateY(-2px);
}

.home-tab-button.active {
    background: var(--home-primary);
    color: white;
    box-shadow: 0 4px 10px rgba(22, 93, 255, 0.2);
    border-bottom: 1px solid var(--home-primary);
}

/* 筛选栏 */
.home-filter-bar {
    position: relative;
    margin: 1rem 0 1.5rem;
}

.home-filter-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    border-radius: var(--home-radius);
    border: 1px solid #ddd;
    background: var(--home-light);
    color: var(--home-dark);
    font-weight: 500;
    transition: var(--home-transition);
    font-size: 0.95rem;
}

.home-filter-toggle:hover {
    background: var(--home-neutral);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.home-filter-toggle i {
    transition: transform 0.3s ease;
}

.home-filter-toggle[aria-expanded="true"] i {
    transform: rotate(180deg);
}

.filter-bar {
    background: var(--home-light);
    border-radius: var(--home-radius);
    padding: 1.5rem;
    box-shadow: var(--home-shadow);
    animation: fadeIn 0.3s ease forwards;
    margin-top: 0.75rem;
}

/* 表单元素 */
.form-group label {
    color: var(--home-dark);
    font-weight: 500;
    margin-bottom: 0.5rem;
    display: block;
}

.form-select, .form-control {
    border-radius: var(--home-radius);
    padding: 0.75rem 1rem;
    border: 1px solid #ddd;
    transition: var(--home-transition);
    background: var(--home-light);
}

.form-select:focus, .form-control:focus {
    border-color: var(--home-secondary);
    box-shadow: 0 0 0 3px rgba(64, 128, 255, 0.2);
}

.input-group .btn {
    border-radius: 0 var(--home-radius) var(--home-radius) 0;
    background: var(--home-primary);
    color: white;
    transition: var(--home-transition);
}

.input-group .btn:hover {
    background: #0E42D2;
    box-shadow: 0 2px 8px rgba(22, 93, 255, 0.2);
}

.show {
    margin-bottom: 0.5rem;
}

/* 作业网格与卡片 */
.home-assignment-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.75rem;
}

.home-assignment-card {
    background: var(--home-light);
    border-radius: var(--home-radius);
    padding: 1.5rem;
    box-shadow: var(--home-shadow);
    transition: var(--home-transition);
    position: relative;
    overflow: hidden;
    border: 1px solid #eee;
}

.home-assignment-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

.home-assignment-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--home-secondary);
}

.home-assignment-card.expired::before {
    background: var(--home-danger);
}

/* 卡片头部徽章 */
.home-assignment-header {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.25rem;
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 0.5rem;
}

/* 隐藏滚动条 */
.home-assignment-header::-webkit-scrollbar,
.home-assignment-header {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

.home-assignment-header::-webkit-scrollbar {
    display: none;
}

/* 徽章通用样式 */
.home-subject-badge, 
.home-type-badge, 
.home-status-badge {
    padding: 0.3rem 0.6rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    white-space: nowrap;
}

.home-subject-badge {
    background: rgba(22, 93, 255, 0.1);
    color: var(--home-primary);
}

.home-type-badge {
    background: rgba(46, 204, 113, 0.1);
    color: var(--home-success);
}

.home-status-badge {
    background: rgba(231, 76, 60, 0.1);
    color: var(--home-danger);
}

.home-status-badge.ongoing {
    background: rgba(46, 204, 113, 0.1);
    color: var(--home-success);
}

/* 卡片内容 */
.home-assignment-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--home-dark);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.home-assignment-meta {
    margin: 1.25rem 0;
    padding: 1rem;
    background: var(--home-tertiary);
    border-radius: var(--home-radius);
}

.home-assignment-meta p {
    margin: 0.5rem 0;
    font-size: 0.95rem;
    color: var(--home-dark);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.home-assignment-meta i {
    color: var(--home-secondary);
    width: 1.25rem;
    text-align: center;
}

.home-countdown {
    color: var(--home-danger);
    font-weight: 600;
    /* animation: pulse 2s infinite; */
}

.home-assignment-content h4 {
    margin: 1.25rem 0 0.75rem;
    color: var(--home-primary);
    font-weight: 600;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.home-assignment-content h4 i {
    color: var(--home-secondary);
}

.home-assignment-content p {
    margin: 0;
    line-height: 1.6;
    color: #666;
    max-height: 100px;
    overflow: hidden;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .home-assignment-grid {
        grid-template-columns: 1fr;
    }
    
    .home-tabs {
        overflow-x: auto;
        white-space: nowrap;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 0;
    }
    
    .home-tab-button {
        display: inline-block;
        float: none;
    }
}

/* 无作业状态 */
.no-assignments {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    text-align: center;
    padding: 2rem;
    margin: 0 auto;
}

.no-assignments i {
    margin-bottom: 1.5rem;
    font-size: 3rem;
    color: #aaa;
}

.no-assignments div:first-of-type {
    margin-bottom: 0.5rem;
    font-size: 1.2rem;
    color: #666;
}

.no-assignments div:last-of-type {
    font-size: 1.5rem;
    color: #888;
    margin-top: 0.5rem;
}

/* 提交统计 */
.submission-stats {
    margin-top: 12px;
    font-size: 13px;
    color: #666;
    display: flex;
    justify-content: flex-start;
    gap: 15px;
    padding: 8px 0;
    border-top: 1px solid #f0f0f0;
    opacity: 0.9;
    transition: opacity 0.3s ease;
}

.submission-stats:hover {
    opacity: 1;
}

.submission-stats span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.submission-stats span:first-child {
    color: #28a745;
}

.submission-stats span:last-child {
    color: #dc3545;
}

.submission-stats i {
    font-size: 12px;
}

/* 提交开关 */
.submission-switch {
    margin-top: 10px;
    padding: 6px 0;
    background: transparent;
    border-radius: var(--home-radius);
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 8px;
}

.switch {
    position: relative;
    display: inline-block;
    width: 46px;
    height: 24px;
    margin-right: 0;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #e0e0e0;
    transition: .3s;
    border-radius: 34px;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background: white;
    transition: .3s;
    border-radius: 50%;
    box-shadow: 0 1px 2px rgba(0,0,0,0.2);
}

input:checked + .slider {
    background: #4cd964;
}

input:checked + .slider:before {
    transform: translateX(22px);
}

input:disabled + .slider {
    opacity: 0.5;
    cursor: not-allowed;
    background: #f0f0f0;
}

.submission-switch span {
    font-size: 13px;
    color: #555;
    font-weight: 400;
}

/* 动画与通知 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.7; }
    100% { opacity: 1; }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translate3d(0, 30px, 0); }
    to { opacity: 1; transform: translate3d(0, 0, 0); }
}

@keyframes fadeOut {
    from { opacity: 1; }
    to { opacity: 0; }
}

.alert {
    position: relative;
    padding: 0.75rem 1.25rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: 0.25rem;
}

.alert-success {
    color: #155724;
    background: #d4edda;
    border-color: #c3e6cb;
}

.alert-error {
    color: #721c24;
    background: #f8d7da;
    border-color: #f5c6cb;
}

/* 加载状态 */
.loading {
    display: flex;
    justify-content: flex-start;
    align-items: center;
    padding: 10px 0;
}

/* 操作按钮 */
.home-assignment-actions {
    margin-top: 15px;
    display: flex;
    justify-content: flex-start;
}

.home-assignment-actions .btn {
    background: var(--home-primary);
    color: white;
    border: none;
    border-radius: var(--home-radius);
    padding: 0.5rem 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--home-transition);
}

.home-assignment-actions .btn:hover {
    background: #0E42D2;
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(22, 93, 255, 0.2);
}

/* 图标通用样式 */
i {
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.custom-notification {
    animation: fadeInUp 0.3s ease forwards, fadeOut 0.3s ease forwards 2.7s;
}