/* ============================================
   布局组件样式 - 导航栏、页脚、页面容器
   ============================================ */

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-primary);
    font-size: 20px;
    font-weight: 600;
    transition: transform var(--transition-fast);
}

.logo:hover {
    transform: scale(1.02);
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--primary-500);
}

.logo-text {
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 导航链接 */
.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
}

.nav-link {
    position: relative;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    padding: var(--space-sm) 0;
    transition: color var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-500);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* 导航操作区 */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

/* 主题切换按钮 */
.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.theme-toggle:hover {
    background: var(--bg-hover);
    color: var(--primary-500);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
    position: absolute;
    transition: all var(--transition-normal);
}

.theme-toggle .sun-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

.theme-toggle .moon-icon {
    opacity: 0;
    transform: rotate(-90deg) scale(0);
}

[data-theme="dark"] .theme-toggle .sun-icon {
    opacity: 0;
    transform: rotate(90deg) scale(0);
}

[data-theme="dark"] .theme-toggle .moon-icon {
    opacity: 1;
    transform: rotate(0deg) scale(1);
}

/* 购物车按钮 */
.cart-btn {
    position: relative;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.cart-btn:hover {
    background: var(--primary-100);
    color: var(--primary-500);
}

.cart-btn svg {
    width: 20px;
    height: 20px;
}

.cart-badge {
    position: absolute;
    top: -4px;
    right: -4px;
    min-width: 18px;
    height: 18px;
    padding: 0 5px;
    background: var(--danger);
    color: white;
    font-size: 11px;
    font-weight: 600;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: scale(0.5);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
}

.cart-badge.show {
    opacity: 1;
    visibility: visible;
    transform: scale(1);
    pointer-events: auto;
}

/* 脉冲动画 */
.cart-badge.pulse {
    animation: badge-pulse 0.5s ease;
}

@keyframes badge-pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.3); }
    100% { transform: scale(1); }
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: center;
    width: 40px;
    height: 40px;
    gap: 5px;
    padding: 8px;
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
}

.mobile-menu-btn span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-fast);
}

.mobile-menu-btn.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端菜单 */
.mobile-menu {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    padding: var(--space-md);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.mobile-menu.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.mobile-nav-links a {
    display: block;
    padding: var(--space-md);
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: background var(--transition-fast);
}

.mobile-nav-links a:hover {
    background: var(--bg-hover);
}

/* 主内容区 */
#mainContent {
    min-height: 100vh;
    padding-top: 64px;
}

/* 页面容器 */
.page {
    display: none;
    animation: fadeIn 0.4s ease;
}

.page.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 页脚 */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-light);
    padding: var(--space-3xl) var(--space-lg) var(--space-xl);
    margin-top: var(--space-3xl);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-2xl);
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.footer-logo svg {
    width: 28px;
    height: 28px;
    color: var(--primary-500);
}

.footer-desc {
    color: var(--text-tertiary);
    line-height: 1.6;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-md);
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-col li,
.footer-col a {
    color: var(--text-secondary);
    font-size: 14px;
    transition: color var(--transition-fast);
}

.footer-col a:hover {
    color: var(--primary-500);
}

.footer-bottom {
    max-width: 1200px;
    margin: var(--space-2xl) auto 0;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-light);
    text-align: center;
}

.footer-bottom p {
    color: var(--text-tertiary);
    font-size: 13px;
}

/* 响应式布局 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: flex;
    }

    .mobile-menu {
        display: block;
    }

    .nav-container {
        padding: 0 var(--space-md);
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-xl);
    }

    .footer-brand {
        max-width: 100%;
    }
}

/* Toast 容器 */
.toast-container {
    position: fixed;
    top: 80px;
    right: var(--space-lg);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    pointer-events: none;
}

.toast {
    background: var(--bg-elevated);
    color: var(--text-primary);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    min-width: 200px;
    opacity: 0;
    transform: translateX(100%);
    transition: all 0.3s ease;
    pointer-events: auto;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
}

.toast.success {
    border-left: 4px solid var(--success);
}

.toast.error {
    border-left: 4px solid var(--danger);
}

.toast.warning {
    border-left: 4px solid var(--warning);
}

.toast.removing {
    animation: slideOutRight 0.3s ease forwards;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideOutRight {
    from {
        opacity: 1;
        transform: translateX(0);
    }
    to {
        opacity: 0;
        transform: translateX(100%);
    }
}

/* Modal 弹窗 */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    max-width: 400px;
    width: 90%;
    text-align: center;
    transform: scale(0.9);
    transition: transform var(--transition-normal);
}

.modal-overlay.show .modal-content {
    transform: scale(1);
}

.success-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--space-lg);
    color: var(--success);
}

.success-modal h3 {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: var(--space-sm);
}

.success-modal p {
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.btn-modal-close {
    background: var(--gradient-primary);
    color: white;
    padding: var(--space-md) var(--space-2xl);
    border-radius: var(--radius-md);
    font-size: 15px;
    font-weight: 500;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-modal-close:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}