/* main.css - 全局样式 */
* { margin:0; padding:0; box-sizing:border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: background 0.2s, color 0.2s;
}
a { color: var(--primary-color); text-decoration: none; }
a:hover { color: var(--primary-hover); }
.container { max-width:1200px; margin:0 auto; padding:0 20px; }

/* 导航栏 */
.navbar {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    padding: 0 20px;
    height: 60px;
    display: flex;
    align-items: center;
    position: sticky;
    top:0;
    z-index:1000;
}
.nav-container { display:flex; align-items:center; justify-content:space-between; width:100%; max-width:1200px; margin:0 auto; }
.nav-left { display:flex; align-items:center; gap:10px; }
.logo { display:flex; align-items:center; gap:8px; font-weight:bold; font-size:18px; color:var(--text-primary); }
.logo img { width:32px; height:32px; }
.nav-menu { display:flex; gap:20px; }
.nav-menu a { color:var(--text-secondary); font-size:15px; padding:5px 0; border-bottom:2px solid transparent; }
.nav-menu a:hover, .nav-menu a.active { color:var(--primary-color); border-bottom-color:var(--primary-color); }
.nav-right { display:flex; align-items:center; gap:15px; }
.theme-btn { background:none; border:1px solid var(--border-color); padding:4px 12px; border-radius:4px; cursor:pointer; font-size:13px; color:var(--text-secondary); }
.theme-btn:hover { background:var(--bg-hover); }
.user-menu { position:relative; cursor:pointer; }
.user-menu span { color:var(--text-primary); }
.dropdown-menu { display:none; position:absolute; right:0; top:30px; background:var(--bg-primary); border:1px solid var(--border-color); border-radius:4px; min-width:120px; box-shadow:0 2px 8px var(--shadow-color); }
.dropdown-menu a { display:block; padding:8px 16px; color:var(--text-secondary); }
.dropdown-menu a:hover { background:var(--bg-hover); }
.user-menu:hover .dropdown-menu { display:block; }

/* 搜索栏 */
.search-section { margin:20px 0; position:relative; }
.search-box { display:flex; gap:10px; }
.search-box input { flex:1; padding:10px 15px; border:1px solid var(--border-color); border-radius:4px; background:var(--bg-input); color:var(--text-primary); font-size:15px; }
.search-box input:focus { outline:none; border-color:var(--primary-color); }
.suggestions-box { position:absolute; top:100%; left:0; right:0; background:var(--bg-primary); border:1px solid var(--border-color); border-radius:4px; margin-top:4px; display:none; z-index:100; }
.suggestions-box .suggestion-item { padding:8px 15px; cursor:pointer; border-bottom:1px solid var(--border-color); }
.suggestions-box .suggestion-item:hover { background:var(--bg-hover); }
.suggestions-box .suggestion-item .type { font-size:12px; color:var(--text-muted); margin-left:8px; }

/* 分类导航 */
.category-tabs { display:flex; gap:8px; flex-wrap:wrap; margin:15px 0; overflow-x:auto; padding-bottom:5px; }
.category-tab { padding:6px 16px; border:1px solid var(--border-color); border-radius:20px; background:var(--bg-primary); color:var(--text-secondary); cursor:pointer; font-size:14px; white-space:nowrap; }
.category-tab:hover { background:var(--bg-hover); }
.category-tab.active { background:var(--primary-color); color:#fff; border-color:var(--primary-color); }

/* Idea卡片 */
.list-header { display:flex; justify-content:space-between; align-items:center; margin:20px 0 15px; }
.sort-buttons { display:flex; gap:5px; }
.sort-btn { padding:5px 12px; border:1px solid var(--border-color); border-radius:4px; background:var(--bg-primary); color:var(--text-secondary); cursor:pointer; font-size:13px; }
.sort-btn:hover { background:var(--bg-hover); }
.sort-btn.active { background:var(--primary-color); color:#fff; border-color:var(--primary-color); }
.idea-list { display:flex; flex-direction:column; gap:15px; }
.idea-card {
    background:var(--bg-card);
    border:1px solid var(--border-color);
    border-radius:4px;
    padding:16px 20px;
    cursor:pointer;
    transition:box-shadow 0.2s;
}
.idea-card:hover { box-shadow:0 2px 8px var(--shadow-color); }
.idea-card .title { font-size:18px; font-weight:bold; margin-bottom:5px; }
.idea-card .title a { color:var(--text-primary); }
.idea-card .title a:hover { color:var(--primary-color); }
.idea-card .meta { font-size:13px; color:var(--text-secondary); margin-bottom:8px; }
.idea-card .summary { color:var(--text-secondary); font-size:14px; margin-bottom:10px; }
.idea-card .author { display:flex; align-items:center; gap:8px; margin-bottom:6px; }
.idea-card .author img { width:24px; height:24px; border-radius:50%; object-fit:cover; }
.idea-card .tags { display:flex; flex-wrap:wrap; gap:4px; margin-bottom:8px; }
.idea-card .tags span { background:var(--bg-tag); padding:2px 8px; border-radius:3px; font-size:12px; color:var(--text-secondary); }
.idea-card .stats { display:flex; gap:15px; font-size:13px; color:var(--text-muted); }
.idea-card .stats .rating { margin-left:auto; color:var(--text-primary); }

/* 分页 */
.pagination { display:flex; justify-content:center; gap:5px; margin:30px 0; }
.pagination a, .pagination span { padding:6px 12px; border:1px solid var(--border-color); border-radius:4px; color:var(--text-secondary); background:var(--bg-primary); }
.pagination a:hover { background:var(--bg-hover); }
.pagination .active { background:var(--primary-color); color:#fff; border-color:var(--primary-color); }

/* 加载遮罩 */
.loading-overlay {
    display:none;
    position:fixed;
    top:0; left:0; width:100%; height:100%;
    background:var(--overlay-bg);
    z-index:9999;
    justify-content:center;
    align-items:center;
    flex-direction:column;
    gap:15px;
}
.loading-overlay.active { display:flex; }
.loader {
    width:40px; height:40px;
    border:4px solid var(--border-color);
    border-top-color:var(--primary-color);
    border-radius:50%;
    animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform:rotate(360deg); } }

/* 通知浮窗 */
.notification-container { position:fixed; top:70px; right:20px; z-index:9999; display:flex; flex-direction:column; gap:8px; }
.notification {
    background:var(--bg-primary);
    border-left:4px solid var(--primary-color);
    padding:12px 16px;
    border-radius:4px;
    box-shadow:0 2px 8px var(--shadow-color);
    min-width:280px;
    max-width:400px;
    animation: slideIn 0.3s ease;
    color:var(--text-primary);
}
.notification.success { border-left-color:var(--success-color); }
.notification.error { border-left-color:var(--danger-color); }
.notification.warning { border-left-color:var(--warning-color); }
@keyframes slideIn { from { transform:translateX(100px); opacity:0; } to { transform:translateX(0); opacity:1; } }

/* 通用按钮 */
.btn { display:inline-block; padding:8px 16px; border:none; border-radius:4px; font-size:14px; cursor:pointer; transition:background 0.2s; }
.btn-primary { background:var(--primary-color); color:#fff; }
.btn-primary:hover { background:var(--primary-hover); }
.btn-primary:disabled { opacity:0.6; cursor:not-allowed; }
.btn-outline { background:transparent; border:1px solid var(--border-color); color:var(--text-secondary); }
.btn-outline:hover { background:var(--bg-hover); }
.btn-danger { background:var(--danger-color); color:#fff; }
.btn-danger:hover { opacity:0.8; }

/* 表单 */
.form-group { margin-bottom:15px; }
.form-group label { display:block; font-weight:500; margin-bottom:4px; color:var(--text-primary); }
.form-group input, .form-group textarea, .form-group select {
    width:100%; padding:10px; border:1px solid var(--border-color); border-radius:4px;
    background:var(--bg-input); color:var(--text-primary); font-size:14px;
}
.form-group input:focus, .form-group textarea:focus { outline:none; border-color:var(--primary-color); }
.form-group .field-error { color:var(--danger-color); font-size:13px; margin-top:3px; display:none; }
.form-group .hint { font-size:12px; color:var(--text-muted); margin-top:3px; }

/* 统计卡片 */
.stats-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:15px; margin:20px 0; }
.stat-card { background:var(--bg-card); border:1px solid var(--border-color); border-radius:4px; padding:16px; text-align:center; }
.stat-label { display:block; font-size:14px; color:var(--text-secondary); }
.stat-number { font-size:28px; font-weight:bold; color:var(--text-primary); }

/* 标签页 */
.tabs-nav { display:flex; border-bottom:2px solid var(--border-color); margin:20px 0; gap:5px; }
.tab-btn { padding:8px 20px; background:none; border:none; cursor:pointer; font-size:15px; color:var(--text-secondary); border-bottom:2px solid transparent; margin-bottom:-2px; }
.tab-btn:hover { color:var(--text-primary); }
.tab-btn.active { color:var(--primary-color); border-bottom-color:var(--primary-color); }
.tab-pane { display:none; padding:15px 0; }
.tab-pane.active { display:block; }

/* 响应式 */
@media (max-width:768px) {
    .nav-menu { display:none; }
    .stats-grid { grid-template-columns:repeat(2,1fr); }
    .dashboard-main { flex-direction:column; }
    .sidebar { width:100%; margin-top:20px; }
    .idea-card { padding:12px; }
}

/* 页脚 */
.footer { border-top:1px solid var(--border-color); padding:20px 0; text-align:center; color:var(--text-secondary); font-size:14px; margin-top:30px; }
.footer a { color:var(--text-secondary); }
.footer a:hover { color:var(--primary-color); }