/* ===================================
   足球赛事情报网 - 响应式样式文件
   =================================== */

/* ===================================
   弹窗组件
   =================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.modal.active {
    opacity: 1;
    visibility: visible;
}

.modal[aria-hidden="true"] {
    opacity: 0;
    visibility: hidden;
}

.modal[aria-hidden="false"] {
    opacity: 1;
    visibility: visible;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
}

.modal-container {
    position: relative;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    max-width: 450px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
    transform: translateY(-20px);
    transition: transform var(--transition-base);
}

.modal.active .modal-container {
    transform: translateY(0);
}

.modal-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 32px;
    height: 32px;
    background: var(--bg-secondary);
    border: none;
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: var(--font-size-xl);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--accent-color);
    color: white;
    transform: rotate(90deg);
}

.modal-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

/* 表单样式 */
.auth-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input {
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
    outline: none;
}

.form-group input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.1);
}

.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--font-size-sm);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
    color: var(--text-secondary);
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.forgot-link {
    color: var(--primary-color);
    text-decoration: none;
}

.forgot-link:hover {
    text-decoration: underline;
}

.auth-divider {
    position: relative;
    text-align: center;
    margin: var(--spacing-md) 0;
}

.auth-divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--border-color);
}

.auth-divider span {
    position: relative;
    background: var(--bg-primary);
    padding: 0 var(--spacing-sm);
    color: var(--text-light);
    font-size: var(--font-size-sm);
}

.social-auth {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-social {
    flex: 1;
    padding: 0.625rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-social:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.auth-switch {
    text-align: center;
    margin-top: var(--spacing-md);
    color: var(--text-secondary);
}

.auth-switch a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.auth-switch a:hover {
    text-decoration: underline;
}

.verify-group {
    display: flex;
    gap: var(--spacing-sm);
}

.verify-group input {
    flex: 1;
}

.btn-send-code {
    white-space: nowrap;
    padding: 0.625rem 1rem;
}

/* 搜索弹窗 */
.search-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 100px;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
}

.search-modal.active {
    opacity: 1;
    visibility: visible;
}

.search-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
}

.search-container {
    position: relative;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    max-width: 600px;
    width: 90%;
    box-shadow: var(--shadow-xl);
    transform: translateY(-20px);
    transition: transform var(--transition-base);
}

.search-modal.active .search-container {
    transform: translateY(0);
}

.search-close {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    width: 32px;
    height: 32px;
    background: var(--bg-secondary);
    border: none;
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: var(--font-size-xl);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.search-close:hover {
    background: var(--accent-color);
    color: white;
}

.search-form {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.search-input {
    flex: 1;
    padding: 0.875rem 1.25rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    outline: none;
    transition: all var(--transition-fast);
}

.search-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(46, 204, 113, 0.1);
}

.search-submit {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: none;
    border-radius: var(--radius-lg);
    color: white;
    cursor: pointer;
    transition: all var(--transition-base);
}

.search-submit:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-md);
}

.search-hot h4 {
    font-size: var(--font-size-base);
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.hot-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.hot-tag {
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.hot-tag:hover {
    background: var(--primary-color);
    color: white;
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border: none;
    border-radius: 50%;
    color: white;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition-base);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

/* ===================================
   响应式设计
   =================================== */

/* 平板尺寸 (768px - 1024px) */
@media (max-width: 1024px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-xl);
    }
    
    .matches-grid {
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    }
    
    .predictions-list {
        grid-template-columns: 1fr;
    }
    
    .article-card.featured {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* 移动端 (最大 768px) */
@media (max-width: 768px) {
    /* 头部导航 */
    .main-nav {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: var(--bg-primary);
        transition: left var(--transition-base);
    }
    
    .main-nav.active {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        padding: var(--spacing-lg);
        gap: 0;
    }
    
    .nav-link {
        padding: 1.5rem 0;
        border-bottom: 1px solid var(--border-light);
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .mobile-menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }
    
    .mobile-menu-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    .auth-buttons {
        display: none;
    }
    
    /* 英雄横幅 */
    .hero-section {
        height: 400px;
        margin-top: 60px;
    }
    
    .hero-title {
        font-size: var(--font-size-2xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .hero-cta {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-large {
        width: 100%;
    }
    
    /* Section */
    .section {
        padding: var(--spacing-lg) 0;
    }
    
    .section-title {
        font-size: var(--font-size-2xl);
    }
    
    /* 比赛卡片 */
    .matches-grid {
        grid-template-columns: 1fr;
    }
    
    .match-teams {
        flex-direction: column;
        gap: var(--spacing-md);
    }
    
    .score {
        order: -1;
        margin-bottom: var(--spacing-md);
    }
    
    /* 预测筛选 */
    .prediction-filters {
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: var(--spacing-sm);
    }
    
    .filter-btn {
        white-space: nowrap;
    }
    
    /* 统计表格 */
    .stats-tabs {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .stats-table {
        font-size: var(--font-size-sm);
    }
    
    .stats-table th,
    .stats-table td {
        padding: var(--spacing-xs);
    }
    
    .form {
        gap: 2px;
    }
    
    .form-badge {
        width: 20px;
        height: 20px;
        font-size: 10px;
    }
    
    /* 文章 */
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    /* 关于我们 */
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    /* 页脚 */
    .footer-links {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    /* 弹窗 */
    .modal-container {
        padding: var(--spacing-lg);
        width: 95%;
    }
    
    .search-container {
        padding: var(--spacing-lg);
        width: 95%;
    }
    
    .social-auth {
        flex-direction: column;
    }
    
    .form-options {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-xs);
    }
    
    /* 回到顶部 */
    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

/* 小屏手机 (最大 480px) */
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .logo-text {
        font-size: var(--font-size-lg);
    }
    
    .header-top {
        padding: 0.75rem 0;
    }
    
    .hero-section {
        height: 300px;
    }
    
    .hero-title {
        font-size: var(--font-size-xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-base);
    }
    
    .team-logo {
        width: 40px;
        height: 40px;
    }
    
    .stat-number {
        font-size: var(--font-size-2xl);
    }
    
    .modal-title {
        font-size: var(--font-size-xl);
    }
}

/* 打印样式 */
@media print {
    .header,
    .footer,
    .back-to-top,
    .btn,
    .modal,
    .search-modal {
        display: none !important;
    }
    
    body {
        background: white;
    }
    
    .section {
        page-break-inside: avoid;
    }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000;
        --text-secondary: #333;
    }
    
    .btn-primary {
        border: 2px solid #000;
    }
}

/* 减少动画 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}