/* ===== 智研坊 v3.0 — 全局样式 ===== */
@import url('https://fonts.googleapis.cn/css2?family=Noto+Sans+SC:wght@300;400;500;700&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --primary: #C62828;
  --primary-hover: #A93226;
  --secondary: #E74C3C;
  --bg: #F5F5F5;
  --card: #FFFFFF;
  --text: #333333;
  --text-secondary: #666666;
  --text-muted: #999999;
  --border: #E0E0E0;
  --panel-bg: #ECF0F1;
  --success: #27AE60;
  --warning: #F39C12;
  --danger: #C62828;
  --topbar-height: 48px;
  --kb-sidebar-width: 260px;
  --bottombar-height: 60px;
  --card-radius: 12px;
  --btn-radius: 20px;
  --font-body: "Noto Sans SC","Source Han Sans CN","PingFang SC","Microsoft YaHei",sans-serif;
  --font-mono: "JetBrains Mono","Fira Code","Consolas",monospace;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{font-size:15px;}
body{font-family:var(--font-body);background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;}

/* ===== Top Bar ===== */
.topbar{position:fixed;top:0;left:0;right:0;height:var(--topbar-height);background:var(--primary);color:#fff;display:flex;align-items:center;padding:0 24px;z-index:100;box-shadow:0 1px 6px rgba(0,0,0,0.1);}
.topbar-brand{display:flex;align-items:center;gap:8px;font-size:1.05rem;font-weight:700;letter-spacing:0.03em;margin-right:32px;white-space:nowrap;}
.brand-icon{font-size:1.2rem;color:#fff;line-height:1;}
.topbar-subtitle{font-size:0.7rem;font-weight:300;opacity:0.65;margin-left:4px;}
.topbar-tabs{display:flex;gap:4px;}
.topbar-tab{padding:8px 18px;font-family:var(--font-body);font-size:0.85rem;font-weight:500;color:rgba(255,255,255,0.7);background:transparent;border:none;border-radius:4px;cursor:pointer;transition:all 0.2s ease;}
.topbar-tab:hover{background:rgba(255,255,255,0.1);color:#fff;}
.topbar-tab.active{background:rgba(255,255,255,0.18);color:#fff;font-weight:600;}

/* ===== App Body ===== */
.app-body{margin-top:var(--topbar-height);margin-bottom:var(--bottombar-height);min-height:calc(100vh - var(--topbar-height) - var(--bottombar-height));}

/* ===== Tab Pages ===== */
.tab-page{display:none;}
.tab-page.active{display:block;}

/* ===== Knowledge Base Layout ===== */
.kb-layout{display:flex;min-height:calc(100vh - var(--topbar-height));}
.kb-sidebar{width:var(--kb-sidebar-width);min-width:var(--kb-sidebar-width);background:var(--card);border-right:1px solid var(--border);overflow-y:auto;position:sticky;top:var(--topbar-height);max-height:calc(100vh - var(--topbar-height));}
.kb-sidebar-header{padding:14px;border-bottom:1px solid var(--border);}
.kb-search{width:100%;padding:7px 10px;border:1px solid var(--border);border-radius:var(--btn-radius);font-family:var(--font-body);font-size:0.82rem;outline:none;}
.kb-search:focus{border-color:var(--primary);box-shadow:0 0 0 2px rgba(192,57,43,0.08);}

.kb-tree{padding:8px 0;}
.kb-tree-group{margin-bottom:2px;}
.kb-tree-group-header{display:flex;align-items:center;gap:6px;padding:8px 14px;font-size:0.82rem;font-weight:600;color:var(--text);cursor:pointer;user-select:none;}
.kb-tree-group-header:hover{background:var(--panel-bg);}
.kb-tree-group-header .arrow{font-size:0.65rem;transition:transform 0.2s ease;color:var(--text-muted);}
.kb-tree-group.open .kb-tree-group-header .arrow{transform:rotate(90deg);}
.kb-tree-items{display:none;}
.kb-tree-group.open .kb-tree-items{display:block;}
.kb-tree-item{display:block;padding:7px 14px 7px 32px;font-size:0.8rem;color:var(--text-secondary);cursor:pointer;text-decoration:none;transition:all 0.15s ease;border-left:2px solid transparent;}
.kb-tree-item:hover{background:var(--panel-bg);color:var(--text);}
.kb-tree-item.active{color:var(--primary);font-weight:600;background:#FFF5F5;border-left-color:var(--primary);}

.kb-main{flex:1;padding:24px 32px;overflow-y:auto;max-width:960px;}
.kb-toolbar{display:flex;justify-content:flex-end;margin-bottom:16px;}
.kb-content{min-height:400px;}
.kb-welcome{text-align:center;padding:60px 20px;}
.kb-welcome h2{font-size:1.3rem;margin-bottom:8px;color:var(--text);}
.kb-welcome p{color:var(--text-secondary);margin-bottom:28px;}

.kb-routes{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:560px;margin:0 auto;}
.kb-route-card{padding:24px;background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);cursor:pointer;transition:all 0.2s ease;text-align:left;}
.kb-route-card:hover{border-color:var(--primary);box-shadow:0 2px 8px rgba(192,57,43,0.08);}
.kb-route-card .icon{font-size:1.8rem;margin-bottom:8px;}
.kb-route-card h3{font-size:0.95rem;margin-bottom:4px;}
.kb-route-card p{font-size:0.78rem;color:var(--text-secondary);line-height:1.5;}

/* KB Content Display */
.kb-article h2{font-size:1.25rem;margin-bottom:12px;color:var(--text);}
.kb-article h4{font-size:0.9rem;margin:16px 0 6px;color:var(--text);}
.kb-article p{font-size:0.88rem;color:var(--text-secondary);line-height:1.75;margin-bottom:10px;}
.kb-article ul,.kb-article ol{padding-left:20px;margin-bottom:10px;}
.kb-article li{font-size:0.88rem;color:var(--text-secondary);line-height:1.7;}
.kb-article .formula-block{background:#FEF9E7;border-left:3px solid var(--warning);padding:8px 14px;margin:10px 0;font-family:var(--font-mono);font-size:0.85rem;color:#7D6608;border-radius:0 4px 4px 0;}
.kb-article strong{color:var(--text);}

/* ===== Project Dashboard ===== */
.project-dashboard{padding:28px 32px;}
.dash-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:24px;}
.dash-header h2{font-size:1.2rem;font-weight:700;}
.project-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px;}
.project-card{background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);padding:18px;cursor:pointer;transition:all 0.2s ease;}
.project-card:hover{border-color:var(--primary);box-shadow:0 2px 8px rgba(192,57,43,0.08);}
.project-card .p-name{font-size:0.95rem;font-weight:600;margin-bottom:6px;}
.project-card .p-meta{font-size:0.73rem;color:var(--text-muted);display:flex;gap:12px;}
.project-card .p-status{display:inline-block;padding:1px 8px;border-radius:3px;font-size:0.7rem;font-weight:500;margin-top:8px;}
.p-status.draft{background:#FEF9E7;color:#7D6608;}
.p-status.done{background:#D5F5E3;color:#1E8449;}

/* ===== Workspace ===== */
.workspace-topbar{display:flex;align-items:center;gap:16px;padding:14px 28px;background:var(--card);border-bottom:1px solid var(--border);}
.workspace-topbar h2{font-size:1rem;font-weight:600;flex:1;}
.workspace-subnav{display:flex;gap:0;padding:0 28px;background:var(--card);border-bottom:2px solid var(--border);}
.ws-tab{padding:10px 20px;font-family:var(--font-body);font-size:0.85rem;font-weight:500;background:none;border:none;border-bottom:2px solid transparent;margin-bottom:-2px;cursor:pointer;color:var(--text-secondary);transition:all 0.2s ease;display:flex;align-items:center;gap:6px;}
.ws-tab:hover{color:var(--text);}
.ws-tab.active{color:var(--primary);border-bottom-color:var(--primary);}
.ws-tab .step-num{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:3px;background:var(--panel-bg);font-size:0.72rem;font-weight:700;font-family:var(--font-mono);}
.ws-tab.active .step-num{background:var(--primary);color:#fff;}

.workspace-panels{padding:24px 28px;}
.ws-panel{display:none;}
.ws-panel.active{display:block;}

/* ===== My Space ===== */
.space-layout{padding:28px 32px;max-width:800px;}
.progress-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;min-height:120px;}
.progress-item{padding:14px;background:#FAFAFA;border:1px solid var(--border);border-radius:var(--card-radius);}
.progress-item .topic{font-size:0.82rem;font-weight:600;}
.progress-item .bar-bg{height:6px;background:var(--panel-bg);border-radius:3px;margin-top:6px;overflow:hidden;}
.progress-item .bar-fill{height:100%;background:var(--success);border-radius:3px;transition:width 0.3s ease;}
.progress-item .score{font-size:0.72rem;color:var(--text-secondary);margin-top:4px;}

.project-history{list-style:none;}
.project-history li{padding:10px 14px;border-bottom:1px solid var(--border);font-size:0.85rem;display:flex;justify-content:space-between;align-items:center;}
.project-history li .h-name{font-weight:500;}
.project-history li .h-date{font-size:0.73rem;color:var(--text-muted);}

/* ===== Quiz Modal ===== */
.quiz-question{margin-bottom:20px;}
.quiz-question h4{font-size:0.95rem;margin-bottom:12px;color:var(--text);}
.quiz-options{list-style:none;}
.quiz-option{padding:10px 14px;margin-bottom:6px;border:1px solid var(--border);border-radius:var(--btn-radius);cursor:pointer;font-size:0.85rem;transition:all 0.15s ease;display:flex;align-items:center;gap:8px;}
.quiz-option:hover{border-color:var(--primary);background:#FFF8F8;}
.quiz-option.selected{border-color:var(--primary);background:#FFF0F0;font-weight:500;}
.quiz-option.correct{border-color:var(--success);background:#D5F5E3;color:#1E8449;}
.quiz-option.wrong{border-color:var(--danger);background:#FADBD8;color:#922B21;}
.quiz-option .opt-letter{display:inline-flex;align-items:center;justify-content:center;width:26px;height:26px;border-radius:50%;border:1px solid var(--border);font-size:0.75rem;font-weight:600;flex-shrink:0;}
.quiz-option.selected .opt-letter{background:var(--primary);color:#fff;border-color:var(--primary);}
.quiz-option.correct .opt-letter{background:var(--success);color:#fff;border-color:var(--success);}
.quiz-option.wrong .opt-letter{background:var(--danger);color:#fff;border-color:var(--danger);}

.quiz-result{text-align:center;padding:20px;}
.quiz-result .score-circle{width:100px;height:100px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:1.8rem;font-weight:700;font-family:var(--font-mono);margin-bottom:12px;}
.quiz-result .score-excellent{background:#D5F5E3;color:#1E8449;}
.quiz-result .score-good{background:#FEF9E7;color:#7D6608;}
.quiz-result .score-poor{background:#FADBD8;color:#922B21;}
.quiz-result p{font-size:0.85rem;color:var(--text-secondary);}

/* ===== Keep existing components (unchanged or lightly adapted) ===== */

/* Panel Header */
.panel-header{margin-bottom:20px;padding-bottom:14px;border-bottom:2px solid var(--border);}
.panel-header h2{font-size:1.3rem;font-weight:700;color:var(--text);margin-bottom:4px;}
.paper-hint{margin-top:8px;padding:8px 12px;background:#FEF9E7;border-left:3px solid var(--warning);border-radius:0 4px 4px 0;font-size:0.8rem;color:#7D6608;}

/* Cards */
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);padding:20px;margin-bottom:16px;}
.card-header{display:flex;align-items:center;justify-content:space-between;padding-bottom:10px;margin-bottom:12px;border-bottom:1px solid var(--border);}
.card-header h3{font-size:0.95rem;font-weight:700;}
.card-body{}

/* Form */
.form-group{margin-bottom:12px;}
.form-group label{display:block;font-size:0.82rem;font-weight:500;margin-bottom:4px;}
input[type="text"],input[type="number"],select,textarea{width:100%;padding:8px 12px;border:1px solid var(--border);border-radius:var(--input-radius,20px);font-family:var(--font-body);font-size:0.88rem;color:var(--text);background:var(--card);outline:none;transition:border-color 0.2s ease;}
input:focus,select:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 2px rgba(192,57,43,0.1);}
input[type="number"]{font-family:var(--font-mono);}
textarea{resize:vertical;min-height:60px;}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 18px;font-family:var(--font-body);font-size:0.85rem;font-weight:500;border:1px solid transparent;border-radius:var(--btn-radius);cursor:pointer;transition:all 0.2s ease;white-space:nowrap;}
.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary);}
.btn-primary:hover{background:var(--primary-hover);}
.btn-secondary{background:var(--card);color:var(--text);border-color:var(--border);}
.btn-secondary:hover{background:var(--panel-bg);}
.btn-outline{background:transparent;color:var(--primary);border-color:var(--primary);}
.btn-outline:hover{background:var(--primary);color:#fff;}
.btn-sm{padding:4px 10px;font-size:0.78rem;}
.btn-danger{background:transparent;color:var(--danger);border-color:var(--danger);}
.btn-danger:hover{background:var(--danger);color:#fff;}
.btn-success{background:var(--success);color:#fff;}
.btn-success:hover{background:#219A52;}

/* Form Row */
.form-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;}
.form-row input,.form-row select{padding:7px 10px;border:1px solid var(--border);border-radius:20px;font-family:var(--font-body);font-size:0.85rem;color:var(--text);background:var(--card);outline:none;}
.form-row input:focus,.form-row select:focus{border-color:var(--primary);}

/* Scale Grid */
.scale-search{display:flex;gap:10px;margin-bottom:14px;}
.search-input{flex:1;padding:7px 12px;border:1px solid var(--border);border-radius:20px;font-family:var(--font-body);font-size:0.85rem;outline:none;}
.search-input:focus{border-color:var(--primary);box-shadow:0 0 0 2px rgba(192,57,43,0.1);}
.filter-select{width:140px;padding:7px 10px;border:1px solid var(--border);border-radius:20px;font-size:0.85rem;cursor:pointer;outline:none;}
.scale-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:12px;}
.scale-card{background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);padding:16px;cursor:pointer;transition:all 0.2s ease;position:relative;}
.scale-card:hover{border-color:var(--primary);box-shadow:0 1px 6px rgba(192,57,43,0.08);}
.scale-card.selected{border-color:var(--primary);background:#FFF5F5;box-shadow:0 1px 8px rgba(192,57,43,0.12);}
.scale-card.selected::after{content:'✓ 已选';position:absolute;top:10px;right:12px;font-size:0.72rem;font-weight:600;color:var(--primary);}
.scale-card .scale-name{font-size:0.92rem;font-weight:700;margin-bottom:4px;padding-right:50px;}
.scale-card .scale-meta{font-size:0.73rem;color:var(--text-muted);margin-bottom:6px;}
.scale-card .scale-desc{font-size:0.78rem;color:var(--text-secondary);line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.scale-card .scale-criteria-tags{display:flex;flex-wrap:wrap;gap:4px;margin-top:8px;}
.criteria-tag{display:inline-block;padding:1px 7px;font-size:0.7rem;background:var(--panel-bg);border-radius:3px;color:var(--text-secondary);font-weight:500;}
.criteria-tag.dir-max{border-left:2px solid var(--success);}
.criteria-tag.dir-min{border-left:2px solid var(--danger);}

/* Indicator List */
.indicator-list{list-style:none;}
.indicator-item{display:flex;align-items:center;gap:12px;padding:10px 14px;background:#FAFAFA;border:1px solid var(--border);border-radius:var(--card-radius);margin-bottom:8px;transition:all 0.2s ease;}
.indicator-item:hover{border-color:var(--primary);background:#FFF8F8;}
.indicator-item .idx{font-family:var(--font-mono);font-weight:700;color:var(--primary);font-size:0.85rem;min-width:32px;}
.indicator-item .info{flex:1;}
.indicator-item .info .name{font-weight:600;font-size:0.9rem;}
.indicator-item .info .meta{font-size:0.75rem;color:var(--text-secondary);}
.indicator-item .actions{display:flex;gap:6px;}

/* Tables */
.data-table{width:100%;border-collapse:collapse;font-size:0.85rem;margin:12px 0;}
.data-table th,.data-table td{padding:8px 10px;text-align:center;border:1px solid var(--border);}
.data-table th{background:var(--panel-bg);font-weight:600;font-size:0.8rem;}
.data-table td{color:var(--text-secondary);font-family:var(--font-mono);font-size:0.82rem;}
.data-table tr:nth-child(even){background:#FAFAFA;}

/* Matrix */
.matrix-wrapper{overflow-x:auto;}
.matrix-table{border-collapse:collapse;margin:8px 0;}
.matrix-table th,.matrix-table td{padding:4px 6px;text-align:center;border:1px solid var(--border);font-size:0.78rem;}
.matrix-table th{background:var(--panel-bg);font-weight:600;max-width:80px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:0.72rem;}
.matrix-table .row-label{background:var(--panel-bg);font-weight:600;text-align:right;padding-right:8px;font-size:0.72rem;max-width:80px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
.matrix-table input.matrix-cell{width:52px;padding:4px;text-align:center;font-size:0.82rem;border:1px solid var(--border);border-radius:3px;font-family:var(--font-mono);}
.matrix-table input.matrix-cell:focus{border-color:var(--primary);outline:none;}

/* Calculation Steps */
.calc-steps{margin-top:16px;}
.calc-step{margin-bottom:12px;border:1px solid var(--border);border-radius:var(--card-radius);overflow:hidden;}
.calc-step .step-toggle{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;background:var(--panel-bg);cursor:pointer;font-size:0.85rem;font-weight:500;user-select:none;}
.calc-step .step-toggle:hover{background:#DEE2E6;}
.calc-step .step-toggle .arrow{transition:transform 0.2s ease;font-size:0.7rem;}
.calc-step.open .step-toggle .arrow{transform:rotate(180deg);}
.calc-step .step-body{display:none;padding:14px;background:var(--card);font-size:0.82rem;}
.calc-step.open .step-body{display:block;}
.calc-step .formula{font-family:var(--font-mono);background:#FAFAFA;padding:4px 8px;border-radius:3px;font-size:0.78rem;color:var(--primary);margin:4px 0;display:inline-block;}

/* Tab Bar */
.tab-bar{display:flex;gap:0;border-bottom:2px solid var(--border);margin-bottom:16px;}
.tab-btn{padding:8px 20px;font-size:0.85rem;font-weight:500;background:none;border:none;border-bottom:2px solid transparent;margin-bottom:-2px;cursor:pointer;color:var(--text-secondary);transition:all 0.2s ease;font-family:var(--font-body);}
.tab-btn:hover{color:var(--text);}
.tab-btn.active{color:var(--primary);border-bottom-color:var(--primary);}
.tab-panel{display:none;}
.tab-panel.active{display:block;}

/* Chart */
.chart-container{width:100%;background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);padding:16px;margin:12px 0;min-height:320px;}
.chart-container svg{width:100%;height:auto;display:block;}

/* Result Summary */
.result-summary{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin:12px 0;}
.result-card{background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);padding:14px;text-align:center;}
.result-card .value{font-family:var(--font-mono);font-size:1.3rem;font-weight:700;color:var(--primary);}
.result-card .label{font-size:0.78rem;color:var(--text-secondary);margin-top:4px;}

/* Ranking */
.ranking-list{list-style:none;}
.ranking-item{display:flex;align-items:center;gap:12px;margin-bottom:8px;}
.ranking-item .rank{font-family:var(--font-mono);font-weight:700;font-size:0.85rem;color:var(--primary);min-width:24px;}
.ranking-item .bar-wrapper{flex:1;background:var(--panel-bg);border-radius:3px;height:24px;overflow:hidden;}
.ranking-item .bar{height:100%;background:var(--primary);border-radius:3px;display:flex;align-items:center;padding-left:8px;font-size:0.75rem;color:#fff;font-weight:500;font-family:var(--font-mono);transition:width 0.3s ease;}
.ranking-item .score{font-family:var(--font-mono);font-size:0.82rem;color:var(--text-secondary);min-width:60px;text-align:right;}

/* Modal */
.modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.4);z-index:200;display:flex;align-items:center;justify-content:center;animation:fadeIn 0.2s ease;}
@keyframes fadeIn{from{opacity:0;}to{opacity:1;}}
.modal-content{background:var(--card);border-radius:var(--card-radius);width:90%;max-width:640px;max-height:80vh;display:flex;flex-direction:column;box-shadow:0 8px 32px rgba(0,0,0,0.15);animation:scaleIn 0.2s ease;}
@keyframes scaleIn{from{transform:scale(0.95);opacity:0;}to{transform:scale(1);opacity:1;}}
.modal-header{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--border);}
.modal-header h3{font-size:1.05rem;font-weight:700;}
.modal-close{width:32px;height:32px;display:flex;align-items:center;justify-content:center;font-size:1.3rem;border:none;background:none;cursor:pointer;color:var(--text-muted);border-radius:3px;}
.modal-close:hover{background:var(--panel-bg);color:var(--text);}
.modal-body{flex:1;overflow-y:auto;padding:20px;}
.modal-footer{display:flex;align-items:center;gap:8px;padding:14px 20px;border-top:1px solid var(--border);}
.modal-footer .btn{margin-left:auto;}
.modal-footer .btn:first-child{margin-left:0;}

/* Scale Detail Modal */
.scale-detail .detail-section{margin-bottom:16px;}
.scale-detail .detail-section h4{font-size:0.85rem;font-weight:600;margin-bottom:6px;}
.scale-detail .criteria-table{width:100%;border-collapse:collapse;font-size:0.82rem;}
.scale-detail .criteria-table th,.scale-detail .criteria-table td{padding:6px 10px;border:1px solid var(--border);text-align:left;}
.scale-detail .criteria-table th{background:var(--panel-bg);font-weight:600;font-size:0.78rem;}

/* Badges */
.badge{display:inline-block;padding:2px 8px;border-radius:3px;font-size:0.72rem;font-weight:500;}
.badge-pass{background:#D5F5E3;color:#1E8449;}
.badge-fail{background:#FADBD8;color:#922B21;}
.badge-warn{background:#FEF9E7;color:#7D6608;}

/* Toast */
.toast-container{position:fixed;top:68px;right:20px;z-index:300;display:flex;flex-direction:column;gap:8px;}
.toast{padding:12px 20px;border-radius:var(--card-radius);font-size:0.85rem;font-weight:500;animation:slideIn 0.25s ease;box-shadow:0 2px 12px rgba(0,0,0,0.1);}
.toast.success{background:#D5F5E3;color:#1E8449;border:1px solid var(--success);}
.toast.error{background:#FADBD8;color:#922B21;border:1px solid var(--danger);}
.toast.warning{background:#FEF9E7;color:#7D6608;border:1px solid var(--warning);}
@keyframes slideIn{from{transform:translateX(100%);opacity:0;}to{transform:translateX(0);opacity:1;}}

/* Empty State */
.empty-state{text-align:center;padding:36px 20px;color:var(--text-muted);}
.empty-state .icon{font-size:2.2rem;margin-bottom:8px;opacity:0.5;}
.empty-state .text{font-size:0.88rem;}

/* Responsive */
@media(max-width:768px){
  .kb-sidebar{display:none;}
  .kb-layout{flex-direction:column;}
  .kb-main{padding:16px;}
  .kb-routes{grid-template-columns:1fr;}
  .workspace-subnav{overflow-x:auto;}
  .ws-tab{padding:8px 14px;font-size:0.78rem;}
  .workspace-panels{padding:16px;}
  .project-dashboard,.space-layout{padding:16px;}
  .dash-header{flex-direction:column;align-items:flex-start;gap:10px;}
  .scale-grid{grid-template-columns:1fr;}
  .form-row{flex-direction:column;}
}

/* ===== Quiz Instant Feedback ===== */
.quiz-topic{font-size:0.72rem;color:var(--text-muted);font-weight:400;}
.quiz-option.correct{background:#D5F5E3;border-color:var(--success);}
.quiz-option.wrong{background:#FADBD8;border-color:var(--danger);}
.quiz-option.correct .opt-letter{background:var(--success);}
.quiz-option.wrong .opt-letter{background:var(--danger);}
.quiz-feedback{padding:10px 14px;border-radius:4px;margin-top:8px;font-size:0.85rem;}
.quiz-feedback.fb-correct{background:#D5F5E3;color:#1E8449;border-left:3px solid var(--success);}
.quiz-feedback.fb-wrong{background:#FADBD8;color:#922B21;border-left:3px solid var(--danger);}
.wrong-book-card{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;background:#FEF9E7;border:1px solid #F9E79F;border-radius:var(--card-radius);margin:12px 0;font-size:0.85rem;}
.quiz-review-item{display:flex;gap:8px;padding:8px 0;border-bottom:1px solid var(--border);font-size:0.82rem;}
.quiz-review-item.wrong{background:#FFF5F5;padding:8px;border-radius:4px;}
.quiz-review-item .review-icon{font-weight:700;min-width:20px;color:var(--success);}
.quiz-review-item.wrong .review-icon{color:var(--danger);}
.quiz-review-item .review-ans{font-size:0.75rem;color:var(--text-muted);margin-top:2px;}

/* ===== Case Templates ===== */
.template-card{background:var(--panel-bg);border:1px dashed var(--border);}
.template-grid{display:flex;gap:10px;}
.template-btn{flex:1;padding:14px 16px;background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);cursor:pointer;text-align:left;transition:all 0.2s ease;font-family:var(--font-body);}
.template-btn:hover{border-color:var(--primary);box-shadow:0 2px 8px rgba(192,57,43,0.08);}
.template-btn strong{display:block;font-size:0.9rem;margin-bottom:4px;color:var(--text);}
.template-btn span{font-size:0.75rem;color:var(--text-secondary);line-height:1.5;}

/* ===== Space: Wrong Book ===== */
.wrong-book-section{margin-top:20px;}
.wrong-book-list{list-style:none;}
.wrong-book-list li{padding:10px 14px;background:var(--card);border:1px solid var(--border);border-radius:6px;margin-bottom:8px;font-size:0.82rem;}
.wrong-book-list li .wb-q{color:var(--text);margin-bottom:4px;}
.wrong-book-list li .wb-a{color:var(--text-muted);font-size:0.78rem;}

/* ===== v4.0: Bottom TabBar ===== */
.bottombar{position:fixed;bottom:0;left:0;right:0;height:var(--bottombar-height);background:var(--card);border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-around;padding:0 4px;z-index:100;box-shadow:0 -1px 4px rgba(0,0,0,0.05);}
.bb-tab{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:6px 10px;background:none;border:none;cursor:pointer;font-family:var(--font-body);color:var(--text-muted);transition:color 0.2s ease;min-width:52px;position:relative;}
.bb-tab:hover{color:var(--text-secondary);}
.bb-tab.active{color:var(--primary);font-weight:600;}
.bb-tab.active::after{content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);width:20px;height:3px;background:var(--primary);border-radius:0 0 3px 3px;}
.bb-icon{font-size:1.2rem;line-height:1;}
.bb-label{font-size:0.62rem;white-space:nowrap;}

/* ===== v4.0: Homepage ===== */
.home-container{max-width:720px;margin:0 auto;padding:20px 24px 24px;}
.home-hero{text-align:center;padding:32px 20px 24px;}
.home-hero h1{font-size:1.4rem;font-weight:700;margin-bottom:6px;}
.hero-subtitle{font-size:0.88rem;color:var(--text-secondary);}
.home-card{background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);margin-bottom:14px;overflow:hidden;}
.home-card-header{padding:12px 16px;font-weight:600;font-size:0.88rem;border-bottom:1px solid var(--border);background:var(--panel-bg);}
.home-card-body{padding:14px 16px;}
.empty-hint{font-size:0.82rem;color:var(--text-muted);text-align:center;padding:12px 0;}
.empty-hint a{color:var(--primary);text-decoration:none;}

.continue-item{cursor:pointer;padding:8px 0;}
.continue-item:hover{opacity:0.8;}
.continue-title{font-size:0.88rem;font-weight:600;margin-bottom:4px;}
.continue-meta{font-size:0.78rem;color:var(--text-muted);}

.todo-item{display:flex;align-items:center;gap:8px;padding:6px 0;font-size:0.82rem;}
.todo-check{cursor:pointer;user-select:none;font-size:1rem;color:var(--text-muted);}
.todo-check.done{color:var(--success);}
.todo-check.done + span{text-decoration:line-through;color:var(--text-muted);}
.todo-tag{font-size:0.68rem;color:var(--text-muted);background:var(--panel-bg);padding:1px 6px;border-radius:3px;margin-left:auto;}

.stat-row{display:flex;justify-content:space-between;font-size:0.82rem;padding:4px 0;}
.stat-val{color:var(--text);}
.progress-bar{height:6px;background:var(--panel-bg);border-radius:3px;overflow:hidden;margin-top:6px;}
.progress-fill{height:100%;background:var(--primary);border-radius:3px;transition:width 0.5s ease;}

/* ===== v4.0: Placeholder Pages ===== */
.placeholder-page{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:calc(100vh - var(--topbar-height) - var(--bottombar-height) - 40px);text-align:center;padding:40px 20px;}
.placeholder-icon{font-size:4rem;margin-bottom:16px;opacity:0.5;}
.placeholder-page h2{font-size:1.2rem;margin-bottom:8px;}
.placeholder-page p{color:var(--text-secondary);font-size:0.88rem;}
.placeholder-hint{color:var(--text-muted)!important;font-size:0.78rem!important;margin-top:6px;}

/* ===== v4.0: Space Page ===== */
.space-container{max-width:900px;margin:0 auto;padding:20px 24px;}
.space-container h2{font-size:1.15rem;margin-bottom:16px;}
.space-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.space-card{background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);padding:16px;min-height:120px;}
.space-card h3{font-size:0.88rem;font-weight:600;margin-bottom:10px;}

/* ===== v4.0: Sandbox Dashboard ===== */
.dash-desc{color:var(--text-secondary);font-size:0.85rem;margin-bottom:20px;}
.empty-state{text-align:center;padding:40px 20px;color:var(--text-muted);}
.empty-state .icon{font-size:2.5rem;margin-bottom:8px;}
.empty-state .text{font-size:0.85rem;}

/* ===== v4.0: Workspace Topbar ===== */
.workspace-topbar{display:flex;align-items:center;gap:12px;padding:12px 24px;background:var(--card);border-bottom:1px solid var(--border);}
.workspace-topbar h2{flex:1;font-size:1rem;font-weight:600;}
.workspace-subnav{display:flex;background:var(--primary);}
.ws-tab{flex:1;padding:10px 8px;background:none;border:none;color:rgba(255,255,255,0.7);cursor:pointer;font-family:var(--font-body);font-size:0.78rem;text-align:center;transition:all 0.2s ease;}
.ws-tab:hover{background:rgba(255,255,255,0.08);color:#fff;}
.ws-tab.active{background:rgba(255,255,255,0.15);color:#fff;font-weight:600;}
.ws-tab .step-num{display:inline-block;width:20px;height:20px;line-height:20px;border-radius:50%;background:rgba(255,255,255,0.2);margin-right:4px;font-size:0.7rem;}

/* ===== v4.0: Responsive ===== */
@media (max-width:640px){
  .space-grid{grid-template-columns:1fr;}
  .bb-label{font-size:0.55rem;}
  .bb-icon{font-size:1.1rem;}
  .workspace-topbar{flex-wrap:wrap;gap:8px;}
  .workspace-subnav{overflow-x:auto;}
  .ws-tab{flex:0 0 auto;min-width:70px;font-size:0.7rem;}
}

/* ===== v4.0 Homepage ===== */
.homepage{padding:20px 24px 80px;max-width:960px;margin:0 auto;}
.hp-hero{text-align:center;padding:32px 0 24px;}
.hp-hero h1{font-size:1.4rem;font-weight:700;margin-bottom:6px;}
.hp-hero p{color:var(--text-secondary);font-size:0.9rem;}
.hp-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;}
.hp-card{background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);padding:18px;transition:all 0.2s ease;}
.hp-card:hover{border-color:var(--primary);box-shadow:0 2px 8px rgba(192,57,43,0.08);}
.hp-card-icon{font-size:1.5rem;margin-bottom:6px;}
.hp-card-title{font-weight:600;font-size:0.95rem;margin-bottom:4px;}
.hp-card-sub{color:var(--text-secondary);font-size:0.82rem;margin-bottom:10px;}
.hp-card.empty{opacity:0.7;}
.hp-progress{height:6px;background:var(--panel-bg);border-radius:3px;margin:8px 0;overflow:hidden;}
.hp-progress-bar{height:100%;background:var(--primary);border-radius:3px;transition:width 0.3s ease;}
.hp-progress-text{font-size:0.78rem;color:var(--text-muted);}
.hp-btn{display:inline-block;margin-top:8px;padding:6px 16px;background:var(--primary);color:#fff;border:none;border-radius:var(--btn-radius);font-size:0.82rem;cursor:pointer;}
.hp-btn:hover{background:var(--primary-hover);}
.hp-stats-row{display:flex;justify-content:space-between;font-size:0.85rem;margin:4px 0;}
.hp-stats-val{font-weight:600;color:var(--primary);}
.hp-todo-item{display:flex;align-items:center;gap:8px;padding:6px 0;border-bottom:1px solid var(--border);font-size:0.82rem;}
.hp-todo-item.done .hp-todo-text{text-decoration:line-through;color:var(--text-muted);}
.hp-todo-check{cursor:pointer;font-size:1rem;flex-shrink:0;}
.hp-todo-text{flex:1;}
.hp-todo-module{font-size:0.72rem;color:var(--text-muted);background:var(--panel-bg);padding:2px 6px;border-radius:3px;}

/* ===== Sandbox Dashboard ===== */
.sandbox-dash{padding:24px 0 80px;}
.sandbox-dash h2{font-size:1.2rem;margin-bottom:4px;}
.dash-sub{color:var(--text-secondary);font-size:0.85rem;margin-bottom:16px;}
.dash-actions{margin-bottom:16px;}
.pcard{background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);padding:14px;cursor:pointer;margin-bottom:8px;transition:all 0.2s ease;}
.pcard:hover{border-color:var(--primary);box-shadow:0 2px 6px rgba(192,57,43,0.06);}
.pcard-name{font-weight:600;font-size:0.9rem;}
.pcard-meta{font-size:0.78rem;color:var(--text-muted);margin-top:4px;}
.pcard-empty{text-align:center;padding:40px;color:var(--text-muted);font-size:0.9rem;}

/* ===== v4.0 Bottom Bar ===== */
.bottombar{position:fixed;bottom:0;left:0;right:0;height:56px;background:var(--card);border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-around;z-index:99;padding:0 4px;box-shadow:0 -1px 4px rgba(0,0,0,0.04);}
.bb-tab,.bb-home{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;flex:1;height:100%;border:none;background:transparent;cursor:pointer;color:var(--text-muted);font-family:var(--font-body);font-size:0.65rem;transition:all 0.2s ease;padding:2px;}
.bb-tab .bb-icon,.bb-home .bb-icon{font-size:1.15rem;line-height:1;}
.bb-tab.active,.bb-home.active{color:var(--primary);font-weight:600;}
.bb-tab:hover,.bb-home:hover{color:var(--primary);}
/* .tab-page is already defined above */

/* ===== Placeholder pages ===== */
.placeholder-page{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:60vh;text-align:center;padding:40px 20px;}
.placeholder-page .ph-icon{font-size:3rem;margin-bottom:16px;}
.placeholder-page h2{font-size:1.2rem;margin-bottom:8px;}
.placeholder-page p{color:var(--text-secondary);font-size:0.9rem;max-width:400px;}

/* Workspace panel inside sandbox */
#wsPanel{padding:0;}
#wsPanel .ws-panel{padding:20px 0;}

/* ===== Knowledge Theory v4.0 — Card Grid ===== */
.kt-topbar{display:flex;align-items:center;gap:10px;padding:16px 24px;flex-wrap:wrap;}
.kt-search{flex:1;min-width:200px;max-width:360px;padding:8px 14px;border:1px solid var(--border);border-radius:var(--btn-radius);font-family:var(--font-body);font-size:0.85rem;outline:none;}
.kt-search:focus{border-color:var(--primary);box-shadow:0 0 0 2px rgba(192,57,43,0.08);}
.kt-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px;padding:0 24px 80px;}
.kt-card{background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);padding:20px;cursor:pointer;transition:all 0.2s ease;position:relative;overflow:hidden;}
.kt-card:hover{border-color:var(--primary);box-shadow:0 3px 12px rgba(192,57,43,0.08);transform:translateY(-2px);}
.kt-card-title{font-size:1.05rem;font-weight:700;margin-bottom:6px;display:flex;align-items:center;gap:8px;}
.kt-card-tag{font-size:0.65rem;padding:2px 8px;border-radius:10px;background:var(--panel-bg);color:var(--text-secondary);font-weight:500;}
.kt-card-desc{font-size:0.82rem;color:var(--text-secondary);line-height:1.5;margin-bottom:12px;}
.kt-card-meta{display:flex;align-items:center;gap:12px;font-size:0.75rem;color:var(--text-muted);margin-bottom:10px;}
.kt-stars{color:#F39C12;letter-spacing:1px;}
.kt-stars .empty{color:var(--border);}
.kt-card-bar{height:5px;background:var(--panel-bg);border-radius:3px;overflow:hidden;margin-top:8px;}
.kt-card-bar-fill{height:100%;background:var(--primary);border-radius:3px;transition:width 0.3s ease;}
.kt-card-bar-label{font-size:0.7rem;color:var(--text-muted);margin-top:4px;}

/* ===== Method Detail Page ===== */
.kt-detail{padding:16px 24px 80px;max-width:800px;}
.kt-detail-back{display:inline-flex;align-items:center;gap:4px;padding:6px 14px;background:transparent;border:1px solid var(--border);border-radius:var(--btn-radius);font-family:var(--font-body);font-size:0.82rem;cursor:pointer;color:var(--text-secondary);margin-bottom:20px;transition:all 0.2s ease;}
.kt-detail-back:hover{border-color:var(--primary);color:var(--primary);}
.kt-detail h2{font-size:1.3rem;margin-bottom:6px;}
.kt-detail .kt-detail-meta{font-size:0.82rem;color:var(--text-muted);margin-bottom:20px;}
.kt-detail-section{margin-bottom:20px;}
.kt-detail-section h3{font-size:0.95rem;font-weight:600;margin-bottom:8px;padding-bottom:6px;border-bottom:1px solid var(--border);}
.kt-detail-section p,.kt-detail-section li{font-size:0.85rem;color:var(--text-secondary);line-height:1.7;}
.kt-detail-section ul,.kt-detail-section ol{padding-left:20px;margin:6px 0;}
.kt-detail-steps{counter-reset:step;}
.kt-detail-steps li{counter-increment:step;list-style:none;margin-bottom:10px;padding-left:28px;position:relative;}
.kt-detail-steps li::before{content:counter(step);position:absolute;left:0;top:1px;width:20px;height:20px;background:var(--primary);color:#fff;font-size:0.7rem;font-weight:600;border-radius:50%;display:flex;align-items:center;justify-content:center;}
.kt-detail-example{background:var(--panel-bg);border-radius:8px;padding:14px;font-size:0.82rem;color:var(--text-secondary);line-height:1.6;}
.kt-detail-example strong{color:var(--text);}
.kt-detail-quiz-btn{display:inline-block;margin-top:12px;padding:8px 20px;background:var(--primary);color:#fff;border:none;border-radius:var(--btn-radius);font-size:0.85rem;cursor:pointer;}

/* ================================================================
   RESPONSIVE: Tablet (768px - 1023px)
   ================================================================ */
@media (min-width: 768px) and (max-width: 1023px) {
  /* -- Content containers: percentage-based -- */
  .home-container,
  .space-container {
    max-width: 90vw;
    margin-left: auto;
    margin-right: auto;
  }

  /* -- Home cards: larger inner padding -- */
  .home-card-body { padding: 18px 20px; }
  .home-card-header { padding: 14px 20px; font-size: 0.9rem; }

  /* -- Method cards: 2 columns -- */
  .kt-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    padding: 0 24px 80px;
  }
  .kt-topbar { padding: 16px 24px; }

  /* -- Method detail: wider -- */
  .kt-detail { max-width: 90vw; padding: 16px 24px 80px; }

  /* -- Search box: wider -- */
  .kt-search { max-width: 420px; }

  /* -- Workspace subnav: larger touch targets -- */
  .ws-tab { padding: 12px 20px; font-size: 0.82rem; }
  .workspace-panels { padding: 20px 24px; }

  /* -- Page titles -- */
  .home-hero h1 { font-size: 1.5rem; }
  .kt-detail h2 { font-size: 1.4rem; }

  /* -- Cards: larger padding -- */
  .kt-card { padding: 20px; }
  .space-card { padding: 18px; }

  /* -- Space grid: 2 columns remain -- */
  .space-grid { grid-template-columns: 1fr 1fr; gap: 16px; }

  /* -- Tables: larger -- */
  .data-table th,
  .data-table td { padding: 10px 12px; font-size: 0.85rem; }

  /* -- Modal: wider -- */
  .modal-content { max-width: 700px; }

  /* -- Bottom bar: unchanged proportions -- */
  .bb-tab .bb-label { font-size: 0.62rem; }

  /* Scale library: sidebar becomes top scroll tags */
  .sl-layout{flex-direction:column;}
  .sl-sidebar{width:100%;min-width:auto;position:static;max-height:none;display:flex;flex-wrap:wrap;gap:4px;padding:8px;background:transparent;border:none;}
  .sl-sidebar-header{display:none;}
  .sl-sidebar-divider{display:none;}
  .sl-sidebar-label{display:none;}
  .sl-cat-item{border-left:none;border-radius:var(--btn-radius);padding:5px 10px;font-size:0.75rem;background:var(--panel-bg);}
  .sl-cat-item.active{background:var(--primary);color:#fff;font-weight:600;}
  .sl-cat-item.active .sl-cat-count{background:rgba(255,255,255,0.2);color:#fff;}
  .sl-reli-grid{grid-template-columns:repeat(2,1fr);}
  .scale-page-container{padding:12px 12px 80px;}
}

/* ================================================================
   RESPONSIVE: Desktop (>1024px)
   ================================================================ */
@media (min-width: 1024px) {
  /* -- Global -- */
  html { font-size: 16px; }

  /* -- Content area centering -- */
  .home-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 360px;
    grid-template-rows: auto auto auto;
    gap: 16px;
    padding: 24px 32px 24px;
  }
  .home-hero { grid-column: 1 / -1; grid-row: 1; }
  /* Left column: continue (row2) + recommend (row3) */
  .home-container > :nth-child(2) { grid-column: 1; grid-row: 2; }
  .home-container > :nth-child(3) { grid-column: 1; grid-row: 3; }
  /* Right column: todos (row2) + weekly (row3) */
  .home-container > :nth-child(4) { grid-column: 2; grid-row: 2; }
  .home-container > :nth-child(5) { grid-column: 2; grid-row: 3; }

  .space-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 32px;
  }

  /* -- Method cards: 3 columns -- */
  .kt-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 32px 80px;
  }
  .kt-topbar { max-width: 1200px; margin: 0 auto; padding: 16px 32px; }
  .kt-detail { max-width: 1100px; margin: 0 auto; padding: 20px 32px 80px; }

  /* Method detail: two-column with sidebar-like right */
  .kt-detail {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 32px;
    align-items: start;
  }
  .kt-detail > * { grid-column: 1; }
  /* Right sidebar for "step overview" is built by JS, reserve space */

  /* -- Search box: wider -- */
  .kt-search { max-width: 480px; }

  /* -- Space: 4 cards in a row -- */
  .space-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
  }

  /* -- Page titles -- */
  .home-hero h1 { font-size: 1.75rem; }
  .home-hero .hero-subtitle { font-size: 0.95rem; }
  .kt-detail h2 { font-size: 1.5rem; }
  .space-container h2 { font-size: 1.3rem; }
  .dash-header h2 { font-size: 1.3rem; }

  /* -- Cards: larger inner padding -- */
  .home-card-body { padding: 20px 24px; }
  .home-card-header { padding: 14px 24px; font-size: 0.92rem; }
  .space-card { padding: 22px; }
  .kt-card { padding: 24px; }
  .project-card { padding: 20px; }

  /* -- Bottom bar: hover lift effect -- */
  .bb-tab,
  .bb-home {
    transition: transform 0.2s ease, color 0.2s ease;
  }
  .bb-tab:hover,
  .bb-home:hover {
    transform: translateY(-3px);
    color: var(--primary);
  }
  .bb-tab .bb-label { font-size: 0.68rem; }
  .bb-tab .bb-icon,
  .bb-home .bb-icon { font-size: 1.25rem; }

  /* -- Workspace: horizontal step indicator, centered -- */
  .workspace-subnav { justify-content: center; }
  .ws-tab {
    flex: 0 1 auto;
    padding: 12px 28px;
    font-size: 0.85rem;
  }
  .ws-tab .step-num { margin-right: 6px; }
  .workspace-panels { padding: 24px 32px; max-width: 1200px; margin: 0 auto; }
  .workspace-topbar { padding: 14px 32px; }

  /* Matrix: no scroll, full display */
  .matrix-wrapper { overflow-x: visible; }

  /* -- Tables: larger cells -- */
  .data-table th,
  .data-table td { padding: 10px 16px; font-size: 0.9rem; }
  .matrix-table th,
  .matrix-table td { padding: 6px 12px; font-size: 0.84rem; }
  .matrix-table input.matrix-cell { width: 60px; padding: 5px; }

  /* -- Modal: wider -- */
  .modal-content { max-width: 800px; }
  .modal-body { padding: 24px 28px; }

  /* -- Scale grid: 3 columns -- */
  .scale-grid { grid-template-columns: repeat(3, 1fr); }

  /* -- Project grid: 2 columns -- */
  .project-grid { grid-template-columns: repeat(2, 1fr); }

  /* -- Template grid: side by side -- */
  .template-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

  /* -- Result summary: wider -- */
  .result-summary { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }

  /* -- Project dashboard -- */
  .project-dashboard { padding: 28px 32px; }

  /* -- Stat rows in space: more info density -- */
  .progress-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .project-history li { padding: 12px 18px; }

  /* Scale library: wider layout */
  .sl-layout{gap:24px;}
  .sl-sidebar{width:220px;min-width:220px;}
  .sl-item{padding:16px 20px;}
  .sl-item-name{font-size:0.95rem;}
  .sl-detail{max-width:1000px;}
  .sl-reli-grid{grid-template-columns:repeat(4,1fr);}
  .sl-search{max-width:500px;}
}

/* ================================================================
   RESPONSIVE: Large (>1440px)
   ================================================================ */
@media (min-width: 1440px) {
  /* -- Wider content area -- */
  .home-container {
    max-width: 1400px;
    grid-template-columns: 1fr 400px;
  }
  .space-container { max-width: 1400px; }
  .kt-grid { max-width: 1400px; grid-template-columns: repeat(4, 1fr); }
  .kt-topbar { max-width: 1400px; }
  .kt-detail { max-width: 1300px; }
  .workspace-panels { max-width: 1400px; }

  /* -- Method cards: 4 columns -- */
  .kt-grid { gap: 20px; }

  /* -- Home hero larger -- */
  .home-hero { padding: 40px 20px 28px; }
  .home-hero h1 { font-size: 1.9rem; }

  /* -- Space: wider cards -- */
  .space-grid { gap: 20px; }

  /* -- Scale grid: 4 columns -- */
  .scale-grid { grid-template-columns: repeat(4, 1fr); }

  /* Scale library: 4-column scale list, wider detail */
  .sl-item{flex-direction:row;}
  .sl-reli-grid{grid-template-columns:repeat(4,1fr);}
  .sl-detail{max-width:1200px;}
}
.kt-detail-quiz-btn:hover{background:var(--primary-hover);}

/* Remove old KB styles no longer used */
.kb-layout,.kb-sidebar,.kb-main,.kb-tree,.kb-welcome,.kb-routes,.kb-route-card{display:none;}

/* ===== v4.0 Knowledge Theory ===== */
.knowledge-page{max-width:1020px;margin:0 auto;padding:16px 20px 80px;}
.kp-toolbar{display:flex;gap:10px;margin-bottom:18px;align-items:center;}
.kp-toolbar .kb-search{flex:1;max-width:400px;padding:8px 14px;border:1px solid var(--border);border-radius:var(--btn-radius);font-family:var(--font-body);font-size:0.85rem;outline:none;background:var(--card);}
.kp-toolbar .kb-search:focus{border-color:var(--primary);box-shadow:0 0 0 2px rgba(192,57,43,0.08);}
.mcard-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:14px;}
.mcard{background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);padding:18px;cursor:pointer;transition:all 0.2s ease;}
.mcard:hover{border-color:var(--primary);box-shadow:0 2px 8px rgba(192,57,43,0.08);transform:translateY(-1px);}
.mcard-header{display:flex;align-items:baseline;gap:8px;margin-bottom:8px;}
.mcard-name{font-size:1.05rem;font-weight:700;color:var(--primary);}
.mcard-full{font-size:0.78rem;color:var(--text-muted);}
.mcard-desc{font-size:0.82rem;color:var(--text-secondary);line-height:1.55;margin-bottom:10px;}
.mcard-tags{display:flex;flex-wrap:wrap;gap:4px;margin-bottom:8px;}
.mcard-tag{font-size:0.68rem;color:var(--text-muted);background:var(--panel-bg);padding:2px 8px;border-radius:3px;}
.mcard-meta{display:flex;justify-content:space-between;font-size:0.75rem;color:var(--text-muted);margin-bottom:6px;}
.mcard-diff{color:var(--warning);}
.mcard-mastery{font-weight:500;}

/* Method Detail */
.method-detail{max-width:860px;margin:0 auto;padding:20px 24px 80px;}
.btn-back{display:inline-block;margin-bottom:18px;padding:6px 14px;font-family:var(--font-body);font-size:0.82rem;color:var(--primary);background:transparent;border:1px solid var(--border);border-radius:var(--btn-radius);cursor:pointer;}
.btn-back:hover{background:var(--panel-bg);}
.md-header h2{font-size:1.3rem;margin-bottom:8px;}
.md-meta{display:flex;gap:12px;align-items:center;font-size:0.82rem;color:var(--text-secondary);margin-bottom:20px;flex-wrap:wrap;}
.md-body{font-size:0.9rem;line-height:1.8;color:var(--text);}
.md-body h4{font-size:0.95rem;margin:18px 0 6px;color:var(--text);}
.md-body p{color:var(--text-secondary);margin-bottom:10px;}
.md-section{padding:8px 0;border-bottom:1px solid var(--border);}
.md-actions{display:flex;gap:10px;margin-top:24px;padding-top:18px;border-top:1px solid var(--border);}

/* ===== P1: Scale Library ===== */
.scale-page-container{max-width:1100px;margin:0 auto;padding:16px 16px 80px;min-height:calc(100vh - 120px);}
.sl-layout{display:flex;gap:20px;}
.sl-sidebar{width:200px;min-width:200px;background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);padding:12px 0;position:sticky;top:60px;max-height:calc(100vh - 80px);overflow-y:auto;flex-shrink:0;}
.sl-sidebar-header{font-weight:700;font-size:0.9rem;padding:6px 14px 10px;color:var(--primary);}
.sl-sidebar-divider{border-top:1px solid var(--border);margin:8px 14px;}
.sl-sidebar-label{font-size:0.7rem;color:var(--text-muted);text-transform:uppercase;padding:4px 14px;}
.sl-cat-item{padding:7px 14px;font-size:0.8rem;cursor:pointer;display:flex;justify-content:space-between;align-items:center;transition:all 0.15s;border-left:2px solid transparent;}
.sl-cat-item:hover{background:var(--panel-bg);}
.sl-cat-item.active{color:var(--primary);font-weight:600;background:#FFF5F5;border-left-color:var(--primary);}
.sl-cat-count{font-size:0.7rem;color:var(--text-muted);background:var(--panel-bg);padding:1px 6px;border-radius:10px;}
.sl-main{flex:1;min-width:0;}
.sl-toolbar{display:flex;gap:8px;margin-bottom:14px;flex-wrap:wrap;}
.sl-search{flex:1;min-width:180px;padding:7px 10px;border:1px solid var(--border);border-radius:var(--btn-radius);font-family:var(--font-body);font-size:0.82rem;outline:none;}
.sl-search:focus{border-color:var(--primary);}
.sl-select-hint{background:#FFF5F5;border:1px solid var(--primary);color:var(--primary);padding:8px 14px;border-radius:6px;font-size:0.82rem;margin-bottom:12px;}
.sl-list{display:flex;flex-direction:column;gap:8px;}
.sl-item{display:flex;justify-content:space-between;align-items:center;padding:14px 16px;background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);gap:12px;flex-wrap:wrap;}
.sl-item:hover{border-color:var(--primary);}
.sl-item-main{flex:1;min-width:200px;}
.sl-item-name{font-weight:600;font-size:0.9rem;margin-bottom:3px;}
.sl-item-meta{font-size:0.75rem;color:var(--text-secondary);}
.sl-item-source{font-size:0.7rem;color:var(--text-muted);margin-top:2px;}
.sl-item-actions{display:flex;gap:6px;flex-shrink:0;}
.sl-fav-btn{border:1px solid var(--border);background:var(--card);cursor:pointer;font-size:1rem;padding:5px 10px;border-radius:var(--btn-radius);transition:all 0.2s;}
.sl-fav-btn:hover{background:var(--panel-bg);}
.sl-fav-btn.fav-active{color:var(--primary);border-color:var(--primary);background:#FFF5F5;}
.sl-footer{text-align:center;padding:16px;font-size:0.78rem;color:var(--text-muted);}

/* Scale Detail */
.sl-detail{max-width:900px;margin:0 auto;}
.sl-detail-header{display:flex;justify-content:space-between;align-items:center;margin:12px 0 8px;}
.sl-detail-header h2{font-size:1.3rem;}
.sl-detail-meta{font-size:0.8rem;color:var(--text-secondary);margin-bottom:12px;}
.sl-tree-section{margin-top:20px;}
.sl-tree-section h3{font-size:1rem;margin-bottom:12px;}
.sl-tree-dim{background:var(--card);border:1px solid var(--border);border-radius:6px;padding:12px 14px;margin-bottom:8px;}
.sl-tree-dim-header{display:flex;align-items:center;gap:8px;cursor:pointer;user-select:none;}
.sl-tree-dim-header strong{font-size:0.9rem;}
.sl-tree-toggle{font-size:0.6rem;color:var(--text-muted);}
.sl-dim-weight{font-size:0.72rem;color:var(--text-muted);margin-left:auto;}
.sl-tree-dim-desc{font-size:0.78rem;color:var(--text-secondary);margin:4px 0 0 16px;}
.sl-tree-inds{margin:6px 0 0 16px;padding-left:12px;border-left:2px solid var(--border);}
.sl-tree-ind{padding:4px 0;font-size:0.82rem;color:var(--text-secondary);}
.sl-ind-id{font-family:var(--font-mono);font-size:0.72rem;color:var(--primary);background:#FFF5F5;padding:1px 5px;border-radius:3px;margin-right:4px;}
.sl-ind-desc{color:var(--text-muted);font-size:0.75rem;}
.sl-reliability{margin-top:20px;background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);padding:16px;}
.sl-reliability h3{font-size:1rem;margin-bottom:10px;}
.sl-reli-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(120px,1fr));gap:10px;}
.sl-reli-item{text-align:center;padding:10px;background:var(--panel-bg);border-radius:6px;}
.sl-reli-val{display:block;font-size:1.2rem;font-weight:700;color:var(--primary);font-family:var(--font-mono);}
.sl-reli-label{display:block;font-size:0.7rem;color:var(--text-muted);margin-top:2px;}
.sl-methods{margin-top:20px;}
.sl-methods h3{font-size:1rem;margin-bottom:8px;}
.sl-method-tag{display:inline-block;padding:3px 10px;margin:2px 4px;font-size:0.75rem;background:var(--panel-bg);border:1px solid var(--border);border-radius:var(--btn-radius);color:var(--text-secondary);}

/* Scale Create */
.sl-create{max-width:800px;margin:0 auto;}
.sl-steps{display:flex;gap:0;margin:16px 0 20px;background:var(--primary);border-radius:var(--card-radius);overflow:hidden;}
.sl-step{flex:1;text-align:center;padding:10px;font-size:0.78rem;color:rgba(255,255,255,0.5);font-weight:500;}
.sl-step.active{color:#fff;font-weight:700;background:rgba(0,0,0,0.15);}
.sl-create-body{background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);padding:20px;}
.sl-create-step h3{margin-bottom:16px;}
.sl-create-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:20px;padding-top:16px;border-top:1px solid var(--border);}
.sl-checkbox-group{display:flex;flex-wrap:wrap;gap:8px;}
.sl-checkbox{display:flex;align-items:center;gap:4px;font-size:0.82rem;cursor:pointer;}
.sl-dim-block{background:var(--panel-bg);border:1px solid var(--border);border-radius:6px;padding:12px;margin-bottom:10px;}
.sl-dim-block-header{display:flex;align-items:center;gap:8px;flex-wrap:wrap;}
.sl-dim-name{flex:1;min-width:150px;}
.sl-dim-name,.sl-dim-weight{padding:5px 8px;border:1px solid var(--border);border-radius:4px;font-size:0.82rem;font-family:var(--font-body);}
.sl-ind-editor{margin:8px 0 0 20px;}
.sl-ind-row{display:flex;gap:6px;margin-bottom:4px;align-items:center;}
.sl-ind-row input{padding:4px 8px;border:1px solid var(--border);border-radius:4px;font-size:0.78rem;font-family:var(--font-body);}
.sl-ind-name{flex:2;min-width:100px;}
.sl-ind-desc{flex:3;min-width:120px;}
.sl-dim-check{margin-top:10px;font-size:0.8rem;}
.sl-dim-warning{color:var(--warning);display:flex;align-items:center;gap:10px;}
.sl-dim-ok{color:var(--success);}
.sl-preview{padding:10px 0;}
.sl-preview p{margin:4px 0;font-size:0.85rem;}
.sl-preview-tree{margin-top:12px;}
.sl-preview-dim{padding:8px;border-left:3px solid var(--primary);margin-bottom:8px;background:var(--panel-bg);border-radius:0 4px 4px 0;font-size:0.82rem;}
.sl-preview-dim ul{padding-left:20px;margin-top:4px;}
.sl-preview-dim li{font-size:0.78rem;color:var(--text-secondary);}

/* Scale My */
.sl-my{max-width:900px;margin:0 auto;}
.sl-my h3{font-size:1rem;margin:20px 0 12px;padding-bottom:8px;border-bottom:1px solid var(--border);}

/* ===== P1: Case Learning Module ===== */
.case-page{max-width:1000px;margin:0 auto;padding:20px 16px;}
.case-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px;flex-wrap:wrap;}
.case-header h2{font-size:1.3rem;font-weight:700;}
.case-search{padding:7px 12px;border:1px solid var(--border);border-radius:var(--btn-radius);font-family:var(--font-body);font-size:0.82rem;outline:none;min-width:200px;max-width:320px;flex:1;}
.case-search:focus{border-color:var(--primary);box-shadow:0 0 0 2px rgba(192,57,43,0.08);}

.case-filters{margin-bottom:16px;}
.case-filter-row{display:flex;align-items:center;gap:6px;margin-bottom:8px;flex-wrap:wrap;}
.filter-label{font-size:0.78rem;color:var(--text-muted);font-weight:600;min-width:40px;}
.case-filter-btn{padding:4px 12px;font-size:0.75rem;border:1px solid var(--border);background:var(--card);border-radius:var(--btn-radius);cursor:pointer;transition:all 0.15s;font-family:var(--font-body);color:var(--text-secondary);}
.case-filter-btn:hover{border-color:var(--primary);color:var(--primary);}
.case-filter-btn.active{background:var(--primary);color:#fff;border-color:var(--primary);}

.case-grid{display:grid;grid-template-columns:1fr;gap:14px;}
.case-card{background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);padding:18px;position:relative;transition:all 0.2s;}
.case-card:hover{border-color:var(--primary);box-shadow:0 2px 8px rgba(192,57,43,0.08);}
.case-card-header{font-size:1rem;font-weight:700;margin-bottom:6px;}
.case-card-summary{font-size:0.82rem;color:var(--text-secondary);line-height:1.6;margin-bottom:10px;}
.case-card-meta{display:flex;gap:6px;flex-wrap:wrap;align-items:center;margin-bottom:6px;}
.case-tag{display:inline-block;padding:2px 8px;font-size:0.7rem;background:var(--panel-bg);border:1px solid var(--border);border-radius:var(--btn-radius);color:var(--text-secondary);}
.case-tag.domain{background:#FFF5F5;border-color:rgba(192,57,43,0.15);color:var(--primary);}
.case-diff{font-size:0.72rem;color:var(--text-muted);}
.case-card-source{font-size:0.7rem;color:var(--text-muted);margin-bottom:10px;}
.case-card-actions{display:flex;gap:8px;flex-wrap:wrap;}
.case-viewed-badge{position:absolute;top:12px;right:12px;font-size:0.65rem;background:var(--success);color:#fff;padding:2px 8px;border-radius:var(--btn-radius);}
.case-empty{text-align:center;padding:40px;color:var(--text-muted);}
.case-footer{text-align:center;padding:16px;font-size:0.78rem;color:var(--text-muted);margin-top:8px;}

/* Case Detail */
.case-detail-header{margin-bottom:20px;}
.case-detail-header h2{font-size:1.4rem;margin:12px 0 8px;}
.case-detail-meta{display:flex;gap:16px;font-size:0.82rem;color:var(--text-secondary);flex-wrap:wrap;margin-bottom:12px;}

.case-section{background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);padding:18px;margin-bottom:14px;}
.case-section h3{font-size:1rem;font-weight:700;margin-bottom:12px;color:var(--primary);}
.case-content{font-size:0.88rem;line-height:1.75;color:var(--text-secondary);}
.case-content p{margin-bottom:10px;}
.case-content strong{color:var(--text);}

.case-matrix-wrap{overflow-x:auto;margin-bottom:12px;}
.case-matrix{width:100%;border-collapse:collapse;font-size:0.82rem;}
.case-matrix th,.case-matrix td{padding:8px 12px;border:1px solid var(--border);text-align:center;}
.case-matrix th{background:var(--panel-bg);font-weight:600;font-size:0.78rem;}
.case-matrix td:first-child{text-align:left;font-weight:600;background:var(--panel-bg);}

.case-weights{margin-top:12px;}
.case-weight-item{display:flex;align-items:center;gap:8px;margin-bottom:6px;font-size:0.78rem;}
.case-weight-item span:first-child{min-width:120px;color:var(--text-secondary);}
.case-weight-bar{flex:1;height:8px;background:var(--panel-bg);border-radius:4px;overflow:hidden;}
.case-weight-fill{height:100%;background:var(--primary);border-radius:4px;transition:width 0.3s;}
.case-weight-item span:last-child{min-width:36px;text-align:right;font-family:var(--font-mono);font-weight:600;color:var(--primary);}

.case-steps{padding-left:20px;margin:0;}
.case-steps li{font-size:0.85rem;color:var(--text-secondary);line-height:1.8;margin-bottom:4px;}

.case-result{font-size:0.88rem;margin-bottom:12px;}
.case-ranking{margin:12px 0;}
.case-rank-item{display:flex;align-items:center;gap:8px;margin-bottom:8px;}
.case-rank-num{font-family:var(--font-mono);font-weight:700;color:var(--primary);min-width:28px;font-size:0.9rem;}
.case-rank-name{min-width:100px;font-size:0.85rem;font-weight:600;}
.case-rank-bar{flex:1;height:10px;background:var(--panel-bg);border-radius:5px;overflow:hidden;}
.case-rank-fill{height:100%;background:linear-gradient(90deg,var(--primary),var(--secondary));border-radius:5px;transition:width 0.3s;}
.case-rank-score{font-family:var(--font-mono);font-size:0.82rem;font-weight:600;min-width:40px;text-align:right;}
.case-result-summary{font-size:0.85rem;color:var(--text-secondary);line-height:1.7;margin-top:10px;padding:10px;background:var(--panel-bg);border-radius:6px;}

.case-tasks{display:flex;flex-direction:column;gap:8px;}
.case-task-item{display:flex;align-items:center;gap:10px;padding:10px 14px;background:var(--panel-bg);border-radius:6px;cursor:pointer;transition:all 0.15s;font-size:0.85rem;}
.case-task-item:hover{background:#FFF5F5;}
.case-task-item.done{background:#F0FFF0;}
.case-task-item.done .case-task-text{text-decoration:line-through;color:var(--text-muted);}
.case-task-check{font-size:1.1rem;min-width:24px;}
.case-task-text{flex:1;color:var(--text-secondary);}
.case-task-badge{font-size:0.68rem;background:var(--success);color:#fff;padding:2px 8px;border-radius:var(--btn-radius);}

/* Case responsive */
@media(min-width:768px){
  .case-grid{grid-template-columns:repeat(2,1fr);}
  .case-page{padding:24px 20px;}
  .case-section{padding:22px;}
}
@media(min-width:1024px){
  .case-grid{grid-template-columns:repeat(3,1fr);}
  .case-page{max-width:1200px;padding:28px 24px;}
  .case-section{padding:24px;}
  .case-detail-header h2{font-size:1.6rem;}
}
@media(min-width:1440px){
  .case-page{max-width:1400px;}
}

/* ===== P1: Sandbox Page Styles (v4.2) ===== */
.sandbox-page{max-width:1000px;margin:0 auto;padding:20px 16px;}
.sandbox-header{display:flex;align-items:flex-start;flex-direction:column;gap:4px;margin-bottom:24px;}
.sandbox-header-title{font-size:1.35rem;font-weight:700;color:var(--text);display:flex;align-items:center;gap:8px;}
.sandbox-header-subtitle{font-size:0.88rem;color:var(--text-muted);margin:0;}

.sandbox-steps{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px;}
.sandbox-step-tab{padding:6px 16px;font-size:0.82rem;border:1px solid var(--border);background:var(--card);border-radius:var(--btn-radius);cursor:pointer;transition:all 0.15s;font-family:var(--font-body);color:var(--text-secondary);display:flex;align-items:center;gap:6px;}
.sandbox-step-tab:hover{border-color:var(--primary);color:var(--primary);}
.sandbox-step-tab.active{background:var(--primary);color:#fff;border-color:var(--primary);font-weight:600;}
.sandbox-step-tab.completed{border-color:var(--primary);color:var(--primary);background:#FFF5F5;}
.sandbox-step-tab.completed::after{content:'\2714';color:var(--success);margin-left:2px;font-size:0.75rem;}
.sandbox-step-tab.disabled{opacity:0.5;cursor:not-allowed;}

.sandbox-step-card{background:var(--card);border:1px solid var(--border);border-radius:var(--card-radius);padding:24px;margin-bottom:16px;box-shadow:0 2px 8px rgba(0,0,0,0.06);}

.sandbox-footer{text-align:center;padding:12px;font-size:0.78rem;color:var(--text-muted);margin-top:4px;}

.sandbox-dash-grid{display:grid;grid-template-columns:1fr;gap:14px;}
.sandbox-dash-card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:20px;cursor:pointer;transition:all 0.2s;box-shadow:0 2px 8px rgba(0,0,0,0.06);display:flex;flex-direction:column;}
.sandbox-dash-card:hover{border-color:var(--primary);box-shadow:0 4px 14px rgba(192,57,43,0.12);transform:translateY(-1px);}
.sandbox-dash-card .pcard-name{font-size:0.95rem;font-weight:600;margin-bottom:8px;color:var(--text);}
.sandbox-dash-card .pcard-meta{font-size:0.78rem;color:var(--text-muted);display:flex;gap:12px;margin-bottom:4px;}
.sandbox-dash-empty{text-align:center;padding:40px;color:var(--text-muted);}

@media(min-width:768px){
  .sandbox-page{padding:24px 20px;}
  .sandbox-step-card{padding:22px;}
  .sandbox-dash-grid{grid-template-columns:repeat(2,1fr);}
}
@media(min-width:1024px){
  .sandbox-page{max-width:1200px;padding:28px 24px;}
  .sandbox-step-card{padding:24px;}
  .sandbox-dash-grid{grid-template-columns:repeat(3,1fr);}
}
@media(min-width:1440px){
  .sandbox-page{max-width:1400px;}
}

/* ===== 知识图谱样式 (F3/F4) ===== */
.kt-graph{padding:20px;background:#fff;border-radius:8px;margin-top:16px;}
.kt-graph-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;}
.kt-graph-header h3{font-size:1.2rem;font-weight:600;color:var(--text);margin:0;}
.graph-tooltip{position:absolute;background:#fff;border:1px solid #E0E0E0;border-radius:8px;padding:12px;box-shadow:0 2px 8px rgba(0,0,0,0.1);font-size:13px;max-width:240px;z-index:1000;pointer-events:auto;}
.graph-legend text{font-family:"Noto Sans SC",sans-serif;}
.graph-nodes circle{cursor:pointer;transition:all 0.2s;}
.graph-edges line{transition:all 0.2s;}

@media(min-width:768px){
  .kt-graph{padding:24px;}
  #graphContainer{height:650px !important;}
}
@media(min-width:1024px){
  #graphContainer{height:700px !important;}
}

/* ===== 知识图谱 v2 样式 (30节点双形态) ===== */
.kg-header{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;margin-bottom:20px;}
.kg-header h2{font-size:1.4rem;font-weight:700;color:var(--text);margin:0;}
.kg-view-toggle{display:flex;gap:0;border:1px solid #E0E0E0;border-radius:6px;overflow:hidden;}
.kg-view-toggle button{padding:8px 16px;border:none;background:#fff;color:var(--text-secondary);font-size:13px;cursor:pointer;transition:all 0.2s;}
.kg-view-toggle button.active{background:var(--primary);color:#fff;}
.kg-view-toggle button:hover:not(.active){background:#f5f5f5;}

/* 列表视图 */
.kg-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px;}
.kg-card{background:#fff;border:1px solid #E0E0E0;border-radius:8px;padding:16px;cursor:pointer;transition:all 0.2s;}
.kg-card:hover{border-color:var(--primary);box-shadow:0 2px 8px rgba(0,0,0,0.06);}
.kg-card-header{display:flex;align-items:center;gap:10px;margin-bottom:8px;}
.kg-card-icon{width:36px;height:36px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:18px;}
.kg-card-name{font-size:14px;font-weight:600;color:var(--text);}
.kg-card-desc{font-size:12px;color:var(--text-secondary);line-height:1.5;margin-bottom:10px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.kg-card-meta{display:flex;align-items:center;justify-content:space-between;font-size:11px;color:var(--text-light);}
.kg-card-progress{height:4px;background:#f0f0f0;border-radius:2px;overflow:hidden;margin-top:8px;}
.kg-card-progress-bar{height:100%;border-radius:2px;transition:width 0.3s;}

/* 图谱视图 */
.kg-graph-wrap{background:#fff;border-radius:8px;overflow:hidden;}
.kg-graph-tabs{display:flex;gap:0;border-bottom:1px solid #E0E0E0;background:#fafafa;}
.kg-graph-tabs button{padding:10px 20px;border:none;background:transparent;color:var(--text-secondary);font-size:13px;cursor:pointer;border-bottom:2px solid transparent;transition:all 0.2s;}
.kg-graph-tabs button.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:600;}
.kg-graph-tabs button:hover:not(.active){color:var(--text);}
.kg-graph-body{position:relative;min-height:500px;}
.kg-graph-body svg{width:100%;height:100%;display:block;}

/* 血缘网络节点 */
.kg-node{cursor:pointer;}
.kg-node circle{transition:all 0.3s;}
.kg-node text{font-family:"Noto Sans SC",sans-serif;pointer-events:none;}
.kg-edge{transition:all 0.3s;}

/* 时间线 */
.kg-timeline{padding:24px;}
.kg-timeline-stages{display:flex;gap:0;margin-bottom:32px;position:relative;}
.kg-timeline-stage{flex:1;text-align:center;padding:12px;position:relative;}
.kg-timeline-stage::after{content:'';position:absolute;right:0;top:20%;height:60%;width:1px;background:#E0E0E0;}
.kg-timeline-stage:last-child::after{display:none;}
.kg-timeline-stage-name{font-size:13px;font-weight:600;color:var(--text);margin-bottom:4px;}
.kg-timeline-stage-years{font-size:11px;color:var(--text-light);}
.kg-timeline-nodes{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;}
.kg-timeline-node{padding:6px 12px;border-radius:16px;font-size:12px;cursor:pointer;transition:all 0.2s;border:1px solid #E0E0E0;}
.kg-timeline-node:hover{border-color:var(--primary);transform:translateY(-1px);}
.kg-micro-chain{margin-top:24px;padding:16px;background:#fafafa;border-radius:8px;}
.kg-micro-chain-title{font-size:13px;font-weight:600;color:var(--text);margin-bottom:12px;}
.kg-micro-chain-items{display:flex;flex-wrap:wrap;gap:8px;}
.kg-micro-chain-item{padding:4px 10px;border-radius:4px;font-size:11px;background:#fff;border:1px solid #E0E0E0;}

/* 理论簇 */
.kg-clusters{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:16px;padding:24px;}
.kg-cluster-card{background:#fff;border:1px solid #E0E0E0;border-radius:8px;padding:16px;cursor:pointer;transition:all 0.2s;}
.kg-cluster-card:hover{border-color:var(--primary);box-shadow:0 2px 8px rgba(0,0,0,0.06);}
.kg-cluster-name{font-size:14px;font-weight:600;color:var(--text);margin-bottom:4px;}
.kg-cluster-en{font-size:11px;color:var(--text-light);margin-bottom:10px;}
.kg-cluster-members{display:flex;flex-wrap:wrap;gap:6px;}
.kg-cluster-chip{padding:3px 8px;border-radius:4px;font-size:11px;background:#f5f5f5;color:var(--text-secondary);}

/* 学习路径 */
.kg-paths{padding:24px;}
.kg-path-group{margin-bottom:24px;}
.kg-path-header{display:flex;align-items:center;gap:10px;margin-bottom:12px;}
.kg-path-stage{padding:4px 12px;border-radius:4px;font-size:12px;font-weight:600;color:#fff;}
.kg-path-name{font-size:14px;font-weight:600;color:var(--text);}
.kg-path-methods{display:flex;flex-wrap:wrap;gap:8px;padding-left:20px;}
.kg-path-chip{padding:6px 14px;border-radius:16px;font-size:12px;cursor:pointer;transition:all 0.2s;border:1px solid #E0E0E0;background:#fff;}
.kg-path-chip:hover{border-color:var(--primary);transform:translateY(-1px);}

/* 方法详情 Modal */
.kg-detail-modal{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,0.4);z-index:2000;display:flex;align-items:center;justify-content:center;padding:20px;}
.kg-detail-content{background:#fff;border-radius:12px;max-width:640px;width:100%;max-height:80vh;overflow-y:auto;padding:24px;}
.kg-detail-header{display:flex;align-items:center;gap:12px;margin-bottom:16px;}
.kg-detail-icon{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:24px;}
.kg-detail-title{font-size:1.2rem;font-weight:700;color:var(--text);margin:0;}
.kg-detail-badge{display:inline-block;padding:2px 8px;border-radius:4px;font-size:11px;font-weight:600;color:#fff;margin-left:8px;}
.kg-detail-meta{display:flex;flex-wrap:wrap;gap:16px;font-size:12px;color:var(--text-secondary);margin-bottom:16px;}
.kg-detail-meta span{display:flex;align-items:center;gap:4px;}
.kg-detail-desc{font-size:13px;color:var(--text);line-height:1.6;margin-bottom:16px;}
.kg-detail-section{margin-bottom:16px;}
.kg-detail-section-title{font-size:13px;font-weight:600;color:var(--text);margin-bottom:8px;}
.kg-detail-chips{display:flex;flex-wrap:wrap;gap:6px;}
.kg-detail-chip{padding:4px 10px;border-radius:4px;font-size:11px;background:#f5f5f5;color:var(--text-secondary);cursor:pointer;}
.kg-detail-chip:hover{background:#e8e8e8;}
.kg-detail-close{position:absolute;top:16px;right:16px;width:32px;height:32px;border:none;background:#f5f5f5;border-radius:50%;cursor:pointer;font-size:18px;color:var(--text-secondary);}
.kg-detail-close:hover{background:#e0e0e0;}

/* 响应式 */
@media(max-width:767px){
  .kg-list{grid-template-columns:1fr;}
  .kg-clusters{grid-template-columns:1fr;}
  .kg-graph-tabs button{padding:8px 12px;font-size:12px;}
  .kg-detail-content{padding:16px;max-height:90vh;}
}
@media(min-width:768px){
  .kg-list{grid-template-columns:repeat(2,1fr);}
  .kg-clusters{grid-template-columns:repeat(2,1fr);}
}
@media(min-width:1024px){
  .kg-list{grid-template-columns:repeat(3,1fr);}
  .kg-clusters{grid-template-columns:repeat(3,1fr);}
}

/* ===== 知识图谱 v2 双形态样式 ===== */

/* 视图切换 Tab */
.kb-view-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  padding: 0 20px;
}
.kb-view-tab {
  padding: 8px 16px;
  border: 1px solid #E0E0E0;
  background: #fff;
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.85rem;
  transition: all 0.2s;
}
.kb-view-tab.active {
  background: #C62828;
  color: #fff;
  border-color: #C62828;
}
.kb-view-tab:hover:not(.active) {
  border-color: #C62828;
  color: #C62828;
}

/* 图谱视图容器 */
.kb-graph-view {
  padding: 0 20px;
}
.kb-graph-tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 16px;
  border-bottom: 2px solid #E0E0E0;
}
.kb-graph-tab {
  padding: 10px 16px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 0.85rem;
  color: #666;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.2s;
}
.kb-graph-tab.active {
  color: #C62828;
  border-bottom-color: #C62828;
  font-weight: 600;
}
.kb-graph-tab:hover:not(.active) {
  color: #C62828;
}

/* 图谱工具栏 */
.kb-graph-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  padding: 8px 12px;
  background: #F5F5F5;
  border-radius: 6px;
}
.kb-toggle {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  cursor: pointer;
}
.kb-graph-legend {
  display: flex;
  gap: 12px;
}
.kb-legend-item {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.78rem;
  color: #666;
}
.kb-legend-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

/* 图谱画布 */
.kb-graph-canvas {
  width: 100%;
  height: 500px;
  background: #fff;
  border: 1px solid #E0E0E0;
  border-radius: 8px;
  overflow: auto;
}
.kb-graph-canvas svg {
  width: 100%;
  height: 100%;
}

/* 时间线 */
.kb-timeline-macro {
  padding: 20px;
}
.kb-timeline-stage {
  margin-bottom: 24px;
}
.kb-timeline-stage-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}
.kb-timeline-stage-title {
  font-size: 1rem;
  font-weight: 600;
  color: #333;
}
.kb-timeline-stage-period {
  font-size: 0.78rem;
  color: #999;
}
.kb-timeline-nodes {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-left: 20px;
}
.kb-timeline-node {
  padding: 6px 12px;
  background: #FDF2F0;
  border: 1px solid #E0E0E0;
  border-radius: 6px;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.2s;
}
.kb-timeline-node:hover {
  border-color: #C62828;
  background: #FFF5F5;
}
.kb-timeline-node.active {
  background: #C62828;
  color: #fff;
  border-color: #C62828;
}

/* 微观演化链 */
.kb-timeline-micro {
  padding: 20px;
  border-top: 1px solid #E0E0E0;
}
.kb-timeline-micro-title {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: #333;
}
.kb-evol-chain {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.kb-evol-node {
  padding: 8px 12px;
  background: #F5F5F5;
  border: 1px solid #E0E0E0;
  border-radius: 6px;
  font-size: 0.82rem;
}
.kb-evol-node.origin {
  background: #FFF5F5;
  border-color: #C62828;
}
.kb-evol-arrow {
  color: #999;
  font-size: 0.78rem;
}

/* 理论簇网格 */
.kb-clusters-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
  padding: 20px;
}
.kb-cluster-card {
  background: #fff;
  border: 1px solid #E0E0E0;
  border-radius: 8px;
  padding: 16px;
  cursor: pointer;
  transition: all 0.2s;
}
.kb-cluster-card:hover {
  border-color: #C62828;
  box-shadow: 0 2px 8px rgba(198,40,40,0.1);
}
.kb-cluster-name {
  font-size: 0.95rem;
  font-weight: 600;
  color: #333;
  margin-bottom: 8px;
}
.kb-cluster-members {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.kb-cluster-chip {
  padding: 4px 8px;
  background: #FDF2F0;
  border-radius: 4px;
  font-size: 0.75rem;
  color: #C62828;
}

/* 学习路径 */
.kb-paths-container {
  padding: 20px;
}
.kb-path-stage {
  margin-bottom: 24px;
}
.kb-path-stage-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.kb-path-stage-num {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #C62828;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 600;
}
.kb-path-stage-title {
  font-size: 1rem;
  font-weight: 600;
  color: #333;
}
.kb-path-methods {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-left: 40px;
}
.kb-path-method-chip {
  padding: 6px 12px;
  background: #FDF2F0;
  border: 1px solid #E0E0E0;
  border-radius: 6px;
  font-size: 0.82rem;
  cursor: pointer;
  transition: all 0.2s;
}
.kb-path-method-chip:hover {
  border-color: #C62828;
  background: #FFF5F5;
}

/* 方法详情 Modal v2 */
.method-detail-modal {
  max-width: 720px;
  max-height: 80vh;
  overflow-y: auto;
}
.method-detail-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}
.method-detail-icon {
  font-size: 1.5rem;
}
.method-detail-title {
  font-size: 1.2rem;
  font-weight: 700;
  color: #333;
}
.method-detail-badge {
  padding: 4px 8px;
  background: #C62828;
  color: #fff;
  border-radius: 4px;
  font-size: 0.75rem;
}
.method-detail-meta {
  display: flex;
  gap: 16px;
  margin-bottom: 16px;
  font-size: 0.82rem;
  color: #666;
}
.method-detail-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}
.method-detail-desc {
  font-size: 0.9rem;
  color: #333;
  line-height: 1.6;
  margin-bottom: 16px;
}
.method-detail-section {
  margin-bottom: 16px;
}
.method-detail-section-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: #333;
  margin-bottom: 8px;
}
.method-detail-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.method-detail-chip {
  padding: 4px 8px;
  background: #F5F5F5;
  border: 1px solid #E0E0E0;
  border-radius: 4px;
  font-size: 0.78rem;
  cursor: pointer;
}
.method-detail-chip:hover {
  border-color: #C62828;
  color: #C62828;
}
.method-detail-steps {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.method-detail-step {
  padding: 6px 10px;
  background: #FDF2F0;
  border-radius: 4px;
  font-size: 0.78rem;
  color: #C62828;
}

/* 首页学习覆盖图谱 */
.cover-graph-container {
  width: 100%;
  height: 300px;
  background: #fff;
  border: 1px solid #E0E0E0;
  border-radius: 8px;
  overflow: hidden;
}

/* 当前位置迷你链 */
.mini-chain {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px;
  background: #F5F5F5;
  border-radius: 8px;
}
.mini-chain-node {
  padding: 6px 12px;
  background: #fff;
  border: 1px solid #E0E0E0;
  border-radius: 6px;
  font-size: 0.82rem;
  cursor: pointer;
}
.mini-chain-node.current {
  background: #C62828;
  color: #fff;
  border-color: #C62828;
}
.mini-chain-arrow {
  color: #999;
}

/* 响应式 */
@media (max-width: 768px) {
  .kb-view-tabs {
    padding: 0 12px;
  }
  .kb-graph-view {
    padding: 0 12px;
  }
  .kb-graph-canvas {
    height: 400px;
  }
  .kb-clusters-grid {
    grid-template-columns: 1fr;
  }
  .method-detail-modal {
    max-width: 95vw;
  }


/* ===============================================================
   原型对齐 P0 · 图谱血缘网络完整还原
   =============================================================== */
.net-wrap{padding:20px}
.net-toolbar{display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin-bottom:16px;padding:12px 16px;background:#fff;border-radius:10px;border:1px solid var(--border)}
.net-legend{display:flex;gap:20px;flex-wrap:wrap;align-items:center}
.legend-item{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text-secondary)}
.legend-line-age{width:28px;height:3px;background:var(--primary);border-radius:2px}
.legend-line-combo{width:28px;height:3px;border-top:2px dashed var(--gold)}
.net-wrap-inner{overflow-x:auto;overflow-y:auto;min-height:600px}
.net-svg{background:linear-gradient(180deg,#fff 0%,#FDF9F9 100%);min-width:1300px;min-height:1000px}
.lineage{stroke:var(--primary);stroke-width:2;fill:none;marker-end:url(#arrow-lineage)}
.combo{stroke:#B8860B;stroke-width:2;stroke-dasharray:6 4;fill:none;marker-end:url(#arrow-combo)}
/* 矩形圆角卡片节点 g-node (P0核心，代替原来圆形节点) */
.g-node{position:absolute;width:132px;height:86px;background:#fff;border-radius:10px;border:2px solid #E0E0E0;box-shadow:0 2px 8px rgba(0,0,0,.06);display:flex;flex-direction:column;justify-content:space-between;padding:10px 10px 8px;cursor:pointer;transition:.25s ease;overflow:hidden}
.g-node:hover{transform:translateY(-3px);box-shadow:0 6px 18px rgba(198,40,40,.15)}
.g-node:focus{outline:2px solid var(--primary);outline-offset:3px}
.g-node .year{position:absolute;top:6px;right:8px;font-size:11px;color:#999;font-weight:600}
.g-node .g-name{font-size:13px;font-weight:700;color:#2D2D2D;line-height:1.3;z-index:2}
.g-node .g-sub{font-size:11px;color:#777;z-index:2}
.g-node .g-dot{position:absolute;bottom:8px;right:8px;width:10px;height:10px;border-radius:50%;z-index:2}
.g-node .g-dot.done{background:#27AE60}
.g-node .g-dot.learning{background:#F39C12}
.g-node .g-dot.todo{background:#DDD}
/* 9 簇配色 - 原型定义 */
.g-node.foundation{background:linear-gradient(135deg,#FAFAFA,#F0F0F0);border-color:#BBB}
.g-node.outranking{background:linear-gradient(135deg,#FFF8F0,#FFE8D0);border-color:#D77A30}
.g-node.utility{background:linear-gradient(135deg,#F7FAFF,#DBE8FF);border-color:#4F7FD4}
.g-node.causal{background:linear-gradient(135deg,#FFF3F3,#FFD0D0);border-color:#D33030}
.g-node.pairwise{background:linear-gradient(135deg,#F7FFF7,#D0FFD0);border-color:#50B850}
.g-node.distance{background:linear-gradient(135deg,#FFFBF0,#FFF0B8);border-color:#CCAA00}
.g-node.objective{background:linear-gradient(135deg,#F7F4FF,#E8DFFF);border-color:#8C6CD4}
.g-node.ratio{background:linear-gradient(135deg,#FFF7F0,#FFE0CC);border-color:#D68530}
.g-node.fuzzy{background:linear-gradient(135deg,#FFFAFF,#FFE5FF);border-color:#C260C2}
.g-node.focused{z-index:100;border-color:var(--primary)!important;border-width:3px!important}
.g-node.dimmed{opacity:.25;pointer-events:none}
.g-node.hot{z-index:99;border-color:var(--primary-light)!important;border-width:3px!important;box-shadow:0 0 0 3px rgba(198,40,40,.2),0 8px 24px rgba(198,40,40,.25)!important}
/* 开关 */
.data-overlay{display:flex;align-items:center;gap:6px;font-size:13px;color:var(--text-secondary);cursor:pointer}
.data-overlay input{accent-color:var(--primary)}
/* ===============================================================
   原型对齐 P1 · 首页完整还原
   =============================================================== */
.welcome-card{background:linear-gradient(135deg,var(--primary),var(--primary-light));color:#fff;border-radius:14px;padding:22px;margin-bottom:16px}
.welcome-card h2{font-size:20px;margin-bottom:6px}
.welcome-card p{font-size:13px;opacity:.85;margin-bottom:14px}
.progress-row{display:flex;align-items:center;gap:12px}
.progress-bar{flex:1;height:7px;background:rgba(255,255,255,.25);border-radius:4px;overflow:hidden}
.progress-fill{height:100%;background:#fff;border-radius:4px}
.progress-label{font-size:12px;white-space:nowrap;opacity:.9}
.quick-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-bottom:16px}
.quick-card{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px;cursor:pointer;transition:.2s}
.quick-card:hover{box-shadow:0 4px 12px rgba(198,40,40,.12);border-color:var(--primary-light)}
.quick-card .q-ico{font-size:24px;margin-bottom:8px}
.quick-card h4{font-size:14px;margin-bottom:4px}
.quick-card p{font-size:12px;color:var(--text-secondary)}
.mini-loc{background:var(--card);border:1px solid var(--border);border-radius:12px;padding:16px;margin-bottom:16px}
.mini-loc h4{font-size:14px;margin-bottom:10px}
.mini-chain-row{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.mini-chain-item{padding:4px 10px;border-radius:16px;font-size:12px;background:#FBE9E7;color:var(--primary-light);font-weight:600;cursor:pointer}
.mini-chain-item.current{background:var(--primary);color:#fff}
.mini-chain-arrow{color:#CCC;font-size:12px}
.mini-chain-enter-btn{margin-top:10px;font-size:13px;color:var(--primary);text-decoration:underline;cursor:pointer;display:inline-block}
.todo-path-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.todo-item{display:flex;align-items:center;gap:10px;padding:11px 0;border-bottom:1px solid #F7EDEB;font-size:13px}
.todo-item:last-child{border:none}
.todo-dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}
.todo-tag{font-size:11px;padding:2px 8px;border-radius:4px;background:#FBE9E7;color:var(--primary);white-space:nowrap}
.todo-due{font-size:12px;color:var(--text-secondary);margin-left:auto;white-space:nowrap}
/* chips 分类筛选 (P2) */
.kb-chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:16px}
.chip{padding:6px 13px;border-radius:20px;font-size:12px;border:1px solid var(--border);background:#fff;color:var(--text-secondary);cursor:pointer;transition:.2s}
.chip.active{background:var(--primary);color:#fff;border-color:var(--primary);font-weight:600}
/* 覆盖图谱 - 我的空间 */
.coverage-map{display:grid;gap:10px;grid-template-columns:repeat(7,1fr);padding:20px;background:#fff;border-radius:12px;border:1px solid var(--border)}
.cov-node{display:flex;align-items:center;justify-content:center;border-radius:50%;width:40px;height:40px;font-size:11px;font-weight:600;cursor:pointer;transition:.2s}
.cov-node.done{background:#E8F5E9;color:#2E7D32}
.cov-node.learning{background:#FFF7E0;color:#F57C00}
.cov-node.todo{background:#F5F5F5;color:#999}
}