/* ============================================================
   DJZY通用BBS - 全局美化方案 v2.0
   设计理念：Glassmorphism 2.0 + 渐变强调 + 微动效 + 现代排版
   兼容：Chrome 90+ / Safari 15+ / Firefox 100+ / 移动端
   ============================================================ */

/* ==================== 0. CSS变量增强 ==================== */
:root {
    /* 渐变色板 */
    --bbs-grad-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bbs-grad-blue: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bbs-grad-green: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    --bbs-grad-orange: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --bbs-grad-purple: linear-gradient(135deg, #a18cd1 0%, #fbc2eb 100%);
    --bbs-grad-sunset: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    /* 玻璃拟态 */
    --bbs-glass-bg: rgba(255,255,255,0.85);
    --bbs-glass-bg-dark: rgba(13,17,23,0.75);
    --bbs-text-header: #1f2328;
    --bbs-glass-border: rgba(255,255,255,0.25);
    --bbs-glass-border-dark: rgba(255,255,255,0.08);
    --bbs-glass-blur: 16px;
    --bbs-glass-shadow: 0 8px 32px rgba(31,38,135,0.12);
    /* 阴影增强 */
    --bbs-shadow-glow: 0 0 20px rgba(108,92,231,0.15);
    --bbs-shadow-float: 0 12px 40px rgba(0,0,0,0.1);
    --bbs-shadow-card: 0 2px 8px rgba(0,0,0,0.04), 0 0 1px rgba(0,0,0,0.06);
    --bbs-shadow-card-hover: 0 8px 24px rgba(0,0,0,0.08), 0 0 1px rgba(0,0,0,0.08);
    /* 圆角 */
    --bbs-radius-sm: 8px;
    --bbs-radius: 12px;
    --bbs-radius-lg: 16px;
    --bbs-radius-xl: 20px;
    /* 动画 */
    --bbs-ease: cubic-bezier(0.4, 0, 0.2, 1);
    --bbs-ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
    --bbs-duration: 0.25s;
    --bbs-duration-slow: 0.4s;
}

[data-theme="dark"] {
    --bbs-glass-bg: rgba(22,27,34,0.8);
    --bbs-glass-border: rgba(255,255,255,0.06);
    --bbs-text-header: #e6edf3;
    --bbs-glass-shadow: 0 8px 32px rgba(0,0,0,0.3);
    --bbs-shadow-glow: 0 0 20px rgba(108,92,231,0.25);
    --bbs-shadow-card: 0 2px 8px rgba(0,0,0,0.2), 0 0 1px rgba(255,255,255,0.05);
    --bbs-shadow-card-hover: 0 8px 24px rgba(0,0,0,0.3), 0 0 1px rgba(255,255,255,0.08);
}

/* ==================== 1. 全局基础美化 ==================== */
::selection {
    background: rgba(108,92,231,0.2);
    color: inherit;
}

/* 自定义滚动条 */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(0,0,0,0.15); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(0,0,0,0.25); }
[data-theme="dark"] ::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.15); }
[data-theme="dark"] ::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.25); }

/* 平滑滚动 */
html { scroll-behavior: smooth; }

/* ==================== 2. 导航栏 - 玻璃拟态 ==================== */
.bbs-header {
    background: var(--bbs-glass-bg) !important;
    backdrop-filter: blur(var(--bbs-glass-blur)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--bbs-glass-blur)) saturate(180%);
    border-bottom: 1px solid var(--bbs-glass-border);
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
    transition: all var(--bbs-duration) var(--bbs-ease);
}
[data-theme="dark"] .bbs-header {
    background: var(--bbs-glass-bg-dark) !important;
    border-bottom-color: var(--bbs-glass-border-dark);
}

/* 导航链接颜色 - 适配玻璃拟态背景 */
.bbs-nav-link {
    color: var(--bbs-text-header, #333) !important;
}
.bbs-nav-link:hover {
    color: var(--bbs-primary) !important;
}
.bbs-nav-link.active {
    color: var(--bbs-primary) !important;
}
.bbs-logo-text {
    color: var(--bbs-text-header, #333) !important;
}
.bbs-icon-btn {
    color: var(--bbs-text-sec, #666) !important;
}
.bbs-icon-btn:hover {
    color: var(--bbs-primary) !important;
}

/* 导航链接 hover 渐变下划线 */
.bbs-nav-link {
    position: relative;
    transition: color var(--bbs-duration) var(--bbs-ease);
}
.bbs-nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--bbs-grad-primary);
    border-radius: 1px;
    transition: all var(--bbs-duration) var(--bbs-ease);
    transform: translateX(-50%);
}
.bbs-nav-link:hover::after,
.bbs-nav-link.active::after {
    width: 100%;
}
.bbs-nav-link:hover {
    color: var(--bbs-primary);
}

/* ==================== 3. 帖子卡片 - 现代化 ==================== */
.bbs-topic-item {
    border-radius: var(--bbs-radius);
    border: 1px solid transparent;
    transition: all var(--bbs-duration) var(--bbs-ease);
    position: relative;
    overflow: hidden;
}
.bbs-topic-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: var(--bbs-grad-primary);
    border-radius: var(--bbs-radius) 0 0 var(--bbs-radius);
    transition: width var(--bbs-duration) var(--bbs-ease);
}
.bbs-topic-item:hover {
    background: var(--bbs-bg-hover);
    border-color: var(--bbs-border-light);
    box-shadow: var(--bbs-shadow-card-hover);
    transform: translateY(-1px);
}
.bbs-topic-item:hover::before { width: 3px; }
.bbs-topic-item.istop {
    background: linear-gradient(135deg, rgba(108,92,231,0.03), rgba(108,92,231,0.06));
    border-color: rgba(108,92,231,0.12);
}

/* 帖子标题 hover 效果 */
.bbs-topic-title a,
.bbs-waterfall-title a,
.bbs-timeline-title a,
.bbs-compact-title a {
    transition: color var(--bbs-duration) var(--bbs-ease);
}
.bbs-topic-title a:hover,
.bbs-waterfall-title a:hover,
.bbs-timeline-title a:hover,
.bbs-compact-title a:hover {
    color: var(--bbs-primary);
}

/* 封面图 hover 缩放 */
.bbs-topic-cover img,
.bbs-waterfall-cover img,
.bbs-bigcard-cover img {
    transition: transform var(--bbs-duration-slow) var(--bbs-ease);
    border-radius: var(--bbs-radius-sm);
}
.bbs-topic-item:hover .bbs-topic-cover img,
.bbs-topic-waterfall:hover .bbs-waterfall-cover img {
    transform: scale(1.05);
}

/* ==================== 4. 按钮 - 渐变+微动效 ==================== */
.bbs-btn-primary {
    background: var(--bbs-grad-primary) !important;
    border: none !important;
    box-shadow: 0 2px 8px rgba(108,92,231,0.3);
    transition: all var(--bbs-duration) var(--bbs-ease);
    position: relative;
    overflow: hidden;
}
.bbs-btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.2), transparent);
    opacity: 0;
    transition: opacity var(--bbs-duration) var(--bbs-ease);
}
.bbs-btn-primary:hover {
    box-shadow: 0 4px 16px rgba(108,92,231,0.4);
    transform: translateY(-1px);
}
.bbs-btn-primary:hover::before { opacity: 1; }
.bbs-btn-primary:active { transform: translateY(0); }

.bbs-btn {
    border-radius: var(--bbs-radius-sm) !important;
    transition: all var(--bbs-duration) var(--bbs-ease);
}
.bbs-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--bbs-shadow-card-hover);
}

/* ==================== 5. 标签/徽章 - 渐变 ==================== */
.bbs-tag-pinned {
    background: linear-gradient(135deg, #fbbf24, #f59e0b) !important;
    color: #fff !important;
    border: none !important;
    box-shadow: 0 2px 6px rgba(245,158,11,0.3);
}
.bbs-tag-featured {
    background: linear-gradient(135deg, #a855f7, #6366f1) !important;
    color: #fff !important;
    border: none !important;
    box-shadow: 0 2px 6px rgba(168,85,247,0.3);
}
.bbs-tag-hot {
    background: linear-gradient(135deg, #ef4444, #f97316) !important;
    color: #fff !important;
    border: none !important;
    box-shadow: 0 2px 6px rgba(239,68,68,0.3);
}

/* 分类标签 */
.cate-badge-sm,
.bbs-sort-tag {
    background: rgba(108,92,231,0.08);
    color: var(--bbs-primary);
    border-radius: 6px;
    padding: 2px 8px;
    font-size: 12px;
    transition: all var(--bbs-duration) var(--bbs-ease);
}
.cate-badge-sm:hover,
.bbs-sort-tag:hover {
    background: rgba(108,92,231,0.15);
    transform: translateY(-1px);
}

/* ==================== 6. 搜索弹窗 - 玻璃拟态 ==================== */
.bbs-search-modal .bbs-search-box {
    background: var(--bbs-glass-bg);
    backdrop-filter: blur(20px) saturate(180%);
    -webkit-backdrop-filter: blur(20px) saturate(180%);
    border: 1px solid var(--bbs-glass-border);
    border-radius: var(--bbs-radius-xl);
    box-shadow: var(--bbs-shadow-float);
}
.bbs-search-modal .bbs-search-form {
    border-radius: var(--bbs-radius-lg);
}

/* ==================== 7. 侧边栏卡片 ==================== */
.bbs-widget {
    background: var(--bbs-bg-card);
    border: 1px solid var(--bbs-border-light);
    border-radius: var(--bbs-radius);
    transition: all var(--bbs-duration) var(--bbs-ease);
}
.bbs-widget:hover {
    box-shadow: var(--bbs-shadow-card-hover);
    border-color: rgba(108,92,231,0.15);
}
.bbs-widget-title {
    font-weight: 600;
    position: relative;
    padding-left: 12px;
}
.bbs-widget-title::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 3px;
    height: 14px;
    background: var(--bbs-grad-primary);
    border-radius: 2px;
}

/* ==================== 8. 评论区美化 ==================== */
.bbs-comment-item {
    border-radius: var(--bbs-radius);
    transition: background var(--bbs-duration) var(--bbs-ease);
}
.bbs-comment-item:hover {
    background: var(--bbs-bg-hover);
}
.bbs-comment-avatar {
    border-radius: 50%;
    border: 2px solid transparent;
    background: var(--bbs-grad-primary) border-box;
}
.bbs-comment-form {
    border-radius: var(--bbs-radius);
    border: 1px solid var(--bbs-border-light);
    transition: border-color var(--bbs-duration) var(--bbs-ease);
}
.bbs-comment-form:focus-within {
    border-color: var(--bbs-primary);
    box-shadow: 0 0 0 3px rgba(108,92,231,0.1);
}

/* ==================== 9. 表单元素美化 ==================== */
.bbs-form-input,
.bbs-form-textarea {
    border-radius: var(--bbs-radius-sm) !important;
    border: 1.5px solid var(--bbs-border) !important;
    transition: all var(--bbs-duration) var(--bbs-ease) !important;
    background: var(--bbs-bg-card) !important;
}
.bbs-form-input:focus,
.bbs-form-textarea:focus {
    border-color: var(--bbs-primary) !important;
    box-shadow: 0 0 0 3px rgba(108,92,231,0.1) !important;
}

/* ==================== 10. 布局切换器 ==================== */
.bbs-layout-btn {
    border-radius: var(--bbs-radius-sm);
    transition: all var(--bbs-duration) var(--bbs-ease);
}
.bbs-layout-btn:hover {
    background: rgba(108,92,231,0.08);
    color: var(--bbs-primary);
}
.bbs-layout-btn.active {
    background: var(--bbs-primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(108,92,231,0.3);
}

/* ==================== 11. 分页美化 ==================== */
.bbs-pagination a,
.bbs-pagination span {
    border-radius: var(--bbs-radius-sm) !important;
    transition: all var(--bbs-duration) var(--bbs-ease);
}
.bbs-pagination a:hover {
    background: rgba(108,92,231,0.08);
    color: var(--bbs-primary);
    transform: translateY(-1px);
}
.bbs-pagination .current {
    background: var(--bbs-grad-primary) !important;
    color: #fff !important;
    box-shadow: 0 2px 8px rgba(108,92,231,0.3);
}

/* ==================== 12. 返回顶部按钮 ==================== */
.bbs-back-top {
    background: var(--bbs-glass-bg) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--bbs-glass-border);
    border-radius: 50% !important;
    box-shadow: var(--bbs-shadow-card);
    transition: all var(--bbs-duration) var(--bbs-ease);
}
.bbs-back-top:hover {
    background: var(--bbs-primary) !important;
    color: #fff !important;
    box-shadow: var(--bbs-shadow-glow);
    transform: translateY(-2px);
}

/* ==================== 13. 移动端底部导航 ==================== */
.bbs-mobile-bottom {
    background: var(--bbs-glass-bg) !important;
    backdrop-filter: blur(var(--bbs-glass-blur)) saturate(180%);
    -webkit-backdrop-filter: blur(var(--bbs-glass-blur)) saturate(180%);
    border-top: 1px solid var(--bbs-glass-border);
    box-shadow: 0 -2px 10px rgba(0,0,0,0.04);
}

/* ==================== 14. 私信面板美化 ==================== */
.bbs-msg-panel {
    background: var(--bbs-bg-card);
    border-left: 1px solid var(--bbs-border-light);
    box-shadow: -4px 0 24px rgba(0,0,0,0.1);
}
.bbs-msg-item:hover {
    background: var(--bbs-bg-hover);
}
.bbs-msg-item.unread {
    background: linear-gradient(135deg, rgba(108,92,231,0.04), rgba(108,92,231,0.08));
}

/* ==================== 15. 勋章卡片美化 ==================== */
.bbs-badge-card {
    transition: all var(--bbs-duration) var(--bbs-ease);
    position: relative;
    overflow: hidden;
}
.bbs-badge-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(108,92,231,0.08) 0%, transparent 70%);
    opacity: 0;
    transition: opacity var(--bbs-duration-slow) var(--bbs-ease);
}
.bbs-badge-card:hover::before { opacity: 1; }
.bbs-badge-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--bbs-shadow-float);
}
.bbs-badge-card.earned {
    border-color: rgba(34,197,94,0.3);
    background: linear-gradient(135deg, rgba(34,197,94,0.02), rgba(34,197,94,0.06));
}

/* ==================== 16. 排行榜美化 ==================== */
.bbs-leaderboard-item {
    transition: all var(--bbs-duration) var(--bbs-ease);
}
.bbs-leaderboard-item:hover {
    background: var(--bbs-bg-hover);
}
.bbs-leaderboard-item .rank.top1 {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: #fff;
    box-shadow: 0 2px 8px rgba(245,158,11,0.3);
}
.bbs-leaderboard-item .rank.top2 {
    background: linear-gradient(135deg, #94a3b8, #64748b);
    color: #fff;
}
.bbs-leaderboard-item .rank.top3 {
    background: linear-gradient(135deg, #f97316, #ea580c);
    color: #fff;
}

/* ==================== 17. 签到按钮美化 ==================== */
.bbs-checkin-btn {
    background: transparent;
    border: 1.5px solid var(--bbs-primary);
    color: var(--bbs-primary);
    font-weight: 500;
    transition: all var(--bbs-duration) var(--bbs-ease);
    position: relative;
    overflow: hidden;
}
.bbs-checkin-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--bbs-grad-primary);
    opacity: 0;
    transition: opacity var(--bbs-duration) var(--bbs-ease);
}
.bbs-checkin-btn:hover::before { opacity: 1; }
.bbs-checkin-btn:hover { color: #fff; border-color: transparent; }
.bbs-checkin-btn:hover span,
.bbs-checkin-btn:hover i { position: relative; z-index: 1; }
.bbs-checkin-btn.checked {
    background: var(--bbs-grad-primary);
    border-color: transparent;
    color: #fff;
}

/* ==================== 18. 积分徽章美化 ==================== */
.bbs-points-badge {
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    box-shadow: 0 2px 6px rgba(245,158,11,0.3);
    font-weight: 600;
}

/* ==================== 19. 用户等级徽章 ==================== */
.bbs-level-badge {
    font-weight: 600;
    letter-spacing: 0.5px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.15);
}

/* ==================== 20. 阅读进度条美化 ==================== */
.bbs-read-progress {
    background: rgba(0,0,0,0.03);
}
.bbs-read-progress-bar {
    background: var(--bbs-grad-primary);
    box-shadow: 0 0 10px rgba(108,92,231,0.4);
}

/* ==================== 21. 下载模块美化 ==================== */
.download-module {
    border-radius: var(--bbs-radius);
    border: 1px solid var(--bbs-border-light);
    overflow: hidden;
}
.download-header {
    background: linear-gradient(135deg, rgba(108,92,231,0.04), rgba(108,92,231,0.08));
}
.dl-btn {
    background: var(--bbs-grad-primary);
    border: none;
    border-radius: var(--bbs-radius-sm);
    color: #fff;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(108,92,231,0.3);
    transition: all var(--bbs-duration) var(--bbs-ease);
}
.dl-btn:hover {
    box-shadow: 0 4px 16px rgba(108,92,231,0.4);
    transform: translateY(-1px);
}

/* ==================== 22. 面包屑美化 ==================== */
.bbs-breadcrumb {
    font-size: 13px;
    color: var(--bbs-text-muted);
}
.bbs-breadcrumb a {
    color: var(--bbs-text-sec);
    transition: color var(--bbs-duration) var(--bbs-ease);
}
.bbs-breadcrumb a:hover { color: var(--bbs-primary); }

/* ==================== 23. 404页面美化 ==================== */
.bbs-404 {
    text-align: center;
    padding: 80px 20px;
}
.bbs-404-icon {
    font-size: 80px;
    background: var(--bbs-grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==================== 24. 通知下拉美化 ==================== */
.bbs-notify-dropdown {
    background: var(--bbs-bg-card);
    border: 1px solid var(--bbs-border-light);
    border-radius: var(--bbs-radius);
    box-shadow: var(--bbs-shadow-float);
}
.bbs-notify-item:hover { background: var(--bbs-bg-hover); }

/* ==================== 25. 深色模式特殊处理 ==================== */
[data-theme="dark"] .bbs-topic-item.istop {
    background: linear-gradient(135deg, rgba(108,92,231,0.06), rgba(108,92,231,0.1));
}
[data-theme="dark"] .bbs-btn-primary {
    box-shadow: 0 2px 8px rgba(108,92,231,0.4);
}
[data-theme="dark"] .bbs-badge-card.earned {
    background: linear-gradient(135deg, rgba(34,197,94,0.06), rgba(34,197,94,0.1));
}

/* ==================== 26. 响应式微调 ==================== */
@media (max-width: 768px) {
    .bbs-header {
        backdrop-filter: blur(12px) saturate(180%);
        -webkit-backdrop-filter: blur(12px) saturate(180%);
    }
    .bbs-topic-item:hover {
        transform: none;
    }
    .bbs-badge-card:hover {
        transform: none;
    }
}

/* ==================== 27. 动画关键帧 ==================== */
@keyframes bbsFadeIn {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes bbsSlideInRight {
    from { transform: translateX(100%); }
    to { transform: translateX(0); }
}
@keyframes bbsSlideInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}
@keyframes bbsPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}
@keyframes bbsShimmer {
    0% { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}
@keyframes bbsGlow {
    0%, 100% { box-shadow: 0 0 5px rgba(108,92,231,0.2); }
    50% { box-shadow: 0 0 20px rgba(108,92,231,0.4); }
}

/* 加载骨架屏 */
.bbs-skeleton {
    background: linear-gradient(90deg, var(--bbs-bg-hover) 25%, var(--bbs-bg-active) 50%, var(--bbs-bg-hover) 75%);
    background-size: 200% 100%;
    animation: bbsShimmer 1.5s infinite;
    border-radius: var(--bbs-radius-sm);
}