body:has(.questions-container){overflow:hidden}:root{--qb-bg:var(--theme-bg);--qb-surface:var(--theme-surface);--qb-border:var(--theme-border);--qb-text:var(--theme-text);--qb-text-muted:var(--theme-text-muted);--qb-accent:var(--theme-accent);--qb-accent-light:var(--theme-accent-light);--qb-success:var(--theme-success);--qb-success-light:var(--theme-success-light);--qb-warning:var(--theme-warning);--qb-error:var(--theme-error);--qb-shadow:var(--theme-shadow)}.questions-container{background:var(--qb-bg);height:100dvh;color:var(--qb-text);flex-direction:column;display:flex;overflow:hidden}.questions-main,.questions-content{flex-direction:column;flex:1;min-height:0;padding:8px 16px 20px;display:flex;overflow:hidden}.questions-main--center,.questions-content--center{justify-content:center;align-items:center;min-height:calc(100dvh - 72px);display:flex}.bank-grid{flex:1;grid-template-columns:repeat(auto-fill,minmax(min(100%,320px),1fr));gap:20px;width:100%;max-width:1400px;margin:0 auto;padding:8px;display:grid;overflow-y:auto}.bank-card{background:var(--qb-surface);border:1px solid var(--qb-border);cursor:pointer;box-shadow:var(--qb-shadow);word-break:break-word;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;-webkit-tap-highlight-color:transparent;border-radius:12px;flex-direction:column;gap:10px;min-width:0;padding:14px 16px;transition:all .2s;display:flex}.bank-card:hover{border-color:var(--qb-accent);transform:translateY(-2px);box-shadow:0 4px 12px #0000001a}.bank-header{align-items:center;gap:12px;display:flex}.bank-icon{color:var(--qb-accent);justify-content:center;align-items:center;width:28px;height:28px;font-size:28px;display:flex}.bank-title{color:var(--qb-text);font-size:20px;font-weight:600}.bank-description{color:var(--qb-text-muted);flex:1;margin-bottom:0;font-size:14px;line-height:1.6}.bank-description .markdown-content{line-height:1.6}.bank-description .markdown-content p{margin:0 0 4px!important}.bank-description .markdown-content p:last-child{margin-bottom:0!important}.bank-description .markdown-content ul,.bank-description .markdown-content ol{padding-left:20px;margin:0 0 4px!important}.bank-description .markdown-content ul:last-child,.bank-description .markdown-content ol:last-child{margin-bottom:0!important}.bank-description .markdown-content li{padding:0;margin:0!important}.bank-meta{justify-content:space-between;align-items:center;display:flex}.bank-stats{align-items:center;gap:12px;font-size:13px;display:flex}.bank-stat{color:var(--qb-text-muted);align-items:center;gap:4px;display:flex}.bank-stat i{color:var(--qb-accent)}.difficulty-badge{border-radius:4px;padding:4px 8px;font-size:12px;font-weight:500}.difficulty-beginner{background:var(--qb-success-light);color:var(--qb-success)}.difficulty-intermediate{color:var(--qb-warning);background:#fbbf2426}.difficulty-advanced{color:var(--qb-error);background:#ef444426}.difficulty-mixed{background:var(--qb-accent-light);color:var(--qb-accent)}.bank-progress{margin-top:0}.bank-progress-bar{background:var(--qb-border);border-radius:3px;width:100%;height:6px;overflow:hidden}.bank-progress-fill{background:var(--qb-accent);border-radius:3px;height:100%;transition:width .3s}.bank-progress-text{color:var(--qb-text-muted);text-align:right;margin-top:6px;font-size:12px}.quiz-layout{flex:1;gap:20px;width:100%;max-width:1400px;min-height:0;margin:0 auto;display:flex;overflow:hidden}.question-list-panel{background:var(--qb-surface);border:1px solid var(--qb-border);width:280px;min-height:0;box-shadow:var(--qb-shadow);border-radius:12px;flex-direction:column;flex-shrink:0;display:flex;overflow:hidden}.list-panel-header{border-bottom:1px solid var(--qb-border);padding:16px}.list-panel-title-row{justify-content:space-between;align-items:center;margin-bottom:8px;display:flex}.list-panel-title{color:var(--qb-text);font-size:14px;font-weight:600}.list-progress{color:var(--qb-text-muted);align-items:center;gap:8px;font-size:12px;display:flex}.list-progress-bar{background:var(--qb-border);border-radius:2px;flex:1;height:4px;overflow:hidden}.list-progress-fill{background:var(--qb-accent);height:100%;transition:width .3s}.wrong-only-toggle{color:var(--qb-text-muted);cursor:pointer;-webkit-user-select:none;user-select:none;align-items:center;gap:6px;font-size:12px;display:flex}.wrong-only-toggle input{accent-color:var(--qb-error);cursor:pointer;background:var(--qb-surface);border:1px solid var(--qb-border);border-radius:4px}.wrong-only-toggle:hover{color:var(--qb-text)}.question-list{flex:1;padding:12px;overflow-y:auto}.question-list-item{cursor:pointer;-webkit-user-select:none;user-select:none;-webkit-touch-callout:none;-webkit-tap-highlight-color:transparent;border:1px solid #0000;border-radius:8px;align-items:center;gap:10px;margin-bottom:6px;padding:10px;transition:all .2s;display:flex}.question-list-item:hover{background:var(--qb-bg)}.question-list-item.active{background:var(--qb-accent-light);border-color:var(--qb-accent)}.question-number{border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:28px;height:28px;font-size:12px;font-weight:600;transition:all .2s;display:flex}.question-number.pending{background:var(--qb-border);color:var(--qb-text-muted)}.question-number.answered{background:var(--qb-accent-light);color:var(--qb-accent)}.question-number.correct{background:var(--qb-success);color:#fff}.question-number.wrong{background:var(--qb-error);color:#fff}.question-number.active{background:var(--qb-accent);color:#fff}.question-number.active.correct{background:var(--qb-success);box-shadow:0 0 0 2px white,0 0 0 4px var(--qb-success)}.question-number.active.wrong{background:var(--qb-error);box-shadow:0 0 0 2px white,0 0 0 4px var(--qb-error)}.question-preview{color:var(--qb-text-muted);white-space:nowrap;text-overflow:ellipsis;flex:1;min-width:0;font-size:13px;overflow:hidden}.question-preview .markdown-content{display:inline}.question-preview .markdown-content p{margin:0;display:inline}.question-preview .markdown-content code{background:var(--qb-surface);border-radius:3px;padding:1px 4px;font-size:12px}.question-list-item.active .question-preview{color:var(--qb-text)}.question-vip-icon{color:var(--qb-warning);flex-shrink:0;font-size:14px}.question-lock-icon{color:var(--qb-text-muted);flex-shrink:0;font-size:14px}.answer-panel{background:var(--qb-surface);border:1px solid var(--qb-border);box-shadow:var(--qb-shadow);border-radius:12px;flex-direction:column;flex:1;display:flex;position:relative;overflow:hidden}.answer-panel-header{border-bottom:1px solid var(--qb-border);justify-content:space-between;align-items:center;padding:16px 20px;display:flex}.question-meta{align-items:center;gap:12px;display:flex}.question-type-badge{background:var(--qb-accent-light);color:var(--qb-accent);border-radius:4px;padding:4px 10px;font-size:12px;font-weight:500}.question-points{color:var(--qb-warning);align-items:center;gap:4px;font-size:14px;font-weight:600;display:flex}.question-points .flops-hint{opacity:.6;cursor:help;margin-left:2px;font-size:12px}.answer-panel-content{flex:1;padding:20px;overflow-y:auto}.question-content{color:var(--qb-text);margin-bottom:20px;font-size:16px;line-height:1.7}.options-container{flex-direction:column;gap:10px;display:flex}.option-item{background:var(--qb-bg);border:1px solid var(--qb-border);cursor:pointer;-webkit-user-select:none;user-select:none;-webkit-tap-highlight-color:transparent;border-radius:8px;align-items:flex-start;gap:12px;padding:14px;transition:all .2s;display:flex}.option-item:hover:not(.disabled),.option-item.selected{border-color:var(--qb-accent);background:var(--qb-accent-light)}.option-item.correct{border-color:var(--qb-success);background:var(--qb-success-light)}.option-item.wrong{border-color:var(--qb-error);background:#ef44441a}.option-item.disabled{cursor:default}.option-label{background:var(--qb-surface);border:1px solid var(--qb-border);width:28px;height:28px;color:var(--qb-text-muted);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;font-size:13px;font-weight:600;transition:all .2s;display:flex}.option-item.selected .option-label{background:var(--qb-accent);border-color:var(--qb-accent);color:#fff}.option-item.correct .option-label{background:var(--qb-success);border-color:var(--qb-success);color:#fff}.option-item.wrong .option-label{background:var(--qb-error);border-color:var(--qb-error);color:#fff}.option-text{color:var(--qb-text);flex:1;font-size:14px;line-height:1.6}.answer-textarea{background:var(--qb-bg);border:1px solid var(--qb-border);width:100%;min-height:120px;color:var(--qb-text);resize:vertical;border-radius:8px;padding:14px;font-family:inherit;font-size:14px;line-height:1.6}.answer-textarea:focus{border-color:var(--qb-accent);outline:none}.answer-textarea:disabled{background:var(--qb-bg);cursor:not-allowed}.answer-textarea::placeholder{color:var(--qb-text-muted)}.explanation-panel{background:var(--qb-accent-light);border-radius:8px;margin-top:20px;padding:16px;display:none}.explanation-panel.show{display:block}.explanation-header{color:var(--qb-accent);align-items:center;gap:8px;margin-bottom:12px;font-weight:600;display:flex}.explanation-content{color:var(--qb-text);font-size:14px;line-height:1.7}.reference-answer{border-top:1px solid var(--qb-border);margin-top:16px;padding-top:16px}.reference-answer-label{color:var(--qb-text-muted);margin-bottom:8px;font-size:12px;font-weight:600}.answer-result{border-radius:8px;align-items:center;gap:8px;margin-top:16px;padding:12px 16px;font-size:14px;font-weight:500;display:flex}.answer-result.correct{background:var(--qb-success-light);color:var(--qb-success)}.answer-result.wrong{color:var(--qb-error);background:#ef44441a}.answer-result i{font-size:18px}.answer-panel-footer{padding:16px 20px;padding-bottom:calc(16px + env(safe-area-inset-bottom,0px));border-top:1px solid var(--qb-border);background:var(--qb-surface);justify-content:space-between;align-items:center;gap:16px;display:flex}.nav-buttons{gap:8px;display:flex}.action-buttons{flex:1;justify-content:flex-end;gap:12px;display:flex}.submit-error{color:var(--qb-error);background:#ef44441a;border:1px solid #ef44444d;border-radius:8px;align-items:center;gap:8px;max-width:320px;padding:10px 14px;font-size:14px;display:flex;position:absolute;bottom:80px;right:20px}.quiz-btn{background:var(--qb-surface);border:1px solid var(--qb-border);min-height:40px;color:var(--qb-text);cursor:pointer;white-space:nowrap;border-radius:8px;justify-content:center;align-items:center;gap:8px;padding:10px 16px;font-size:14px;font-weight:500;transition:all .2s;display:flex}@media (hover:hover) and (pointer:fine){.quiz-btn:hover:not(:disabled){border-color:var(--qb-accent);color:var(--qb-accent)}.quiz-btn.primary:hover:not(:disabled){background:var(--theme-accent-hover);border-color:var(--theme-accent-hover);color:#fff}}.quiz-btn:disabled{opacity:.5;cursor:not-allowed}.quiz-btn.primary{background:var(--qb-accent);border-color:var(--qb-accent);color:#fff}.quiz-btn.icon-only{min-width:40px;padding:10px}.detail-loading{color:var(--qb-text-muted);justify-content:center;align-items:center;gap:12px;padding:40px 20px;font-size:14px;display:flex}.detail-loading .spinning{animation:1s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.detail-error{color:var(--qb-error);background:#ef44441a;border:1px solid #ef444433;border-radius:8px;justify-content:center;align-items:center;gap:10px;margin:16px 0;padding:24px 20px;display:flex}.answer-panel-placeholder{height:100%;min-height:200px;color:var(--qb-text-muted);flex-direction:column;justify-content:center;align-items:center;gap:12px;font-size:14px;display:flex}.answer-panel-placeholder i{opacity:.5;font-size:40px}.question-list::-webkit-scrollbar{width:6px}.answer-panel-content::-webkit-scrollbar{width:6px}.question-list::-webkit-scrollbar-track{background:0 0}.answer-panel-content::-webkit-scrollbar-track{background:0 0}.question-list::-webkit-scrollbar-thumb{background:var(--qb-border);border-radius:3px}.answer-panel-content::-webkit-scrollbar-thumb{background:var(--qb-border);border-radius:3px}.question-list::-webkit-scrollbar-thumb:hover{background:var(--qb-text-muted)}.answer-panel-content::-webkit-scrollbar-thumb:hover{background:var(--qb-text-muted)}@media (max-width:1024px){.questions-container{height:100dvh;overflow:hidden}.quiz-layout{flex-direction:column;flex:1;min-height:0}.questions-main,.questions-content{flex-direction:column;flex:1;min-height:0;padding:8px;display:flex;overflow:hidden}.question-list-panel{width:100%;max-height:200px}.question-list{flex-wrap:wrap;gap:8px;padding:12px;display:flex}.question-list-item{flex:none;margin-bottom:0;padding:8px}.question-preview{display:none}.answer-panel{flex:1;min-height:0}}@media (max-width:768px){.questions-container{height:100dvh;padding-bottom:calc(60px + env(safe-area-inset-bottom,0px));flex-direction:column;display:flex;overflow:hidden}.questions-main,.questions-content{padding:8px}.bank-progress{display:none}.bank-grid{flex:1;grid-template-columns:1fr;width:100%;padding:4px 8px;overflow-y:auto}.bank-card{padding:16px}.bank-icon{width:26px;height:26px;font-size:26px}.bank-title{font-size:18px}.bank-description{margin-bottom:12px;font-size:13px}.quiz-layout{flex-direction:column;flex:1;gap:8px;min-height:0;display:flex;overflow:hidden}.question-list-panel{border-radius:8px;flex-shrink:0;width:100%;max-height:none}.list-panel-header{display:none}.question-list{flex-wrap:nowrap;gap:4px;max-height:80px;padding:8px;overflow:auto hidden}.question-list-item{padding:4px}.question-number{width:28px;height:28px;font-size:12px}.question-vip-icon,.question-lock-icon{display:none}.answer-panel{flex-direction:column;flex:1;min-height:0;display:flex}.answer-panel-header{padding:12px 16px}.answer-panel-content{padding:16px}.question-content{margin-bottom:16px;font-size:15px}.option-item{padding:12px}.option-label{width:32px;height:32px}.answer-panel-footer{gap:10px;padding:12px 16px}.nav-buttons{flex-shrink:0}.action-buttons{flex:1;justify-content:flex-end}.quiz-btn{min-height:44px}}@media (max-width:480px){.action-buttons:has(.quiz-btn+.quiz-btn) .quiz-btn .btn-text{display:none}.action-buttons:has(.quiz-btn+.quiz-btn) .quiz-btn{min-width:44px;padding:10px}}.questions-container .markdown-content,.questions-container .markdown-content h1,.questions-container .markdown-content h2,.questions-container .markdown-content h3,.questions-container .markdown-content h4,.questions-container .markdown-content h5,.questions-container .markdown-content h6,.questions-container .markdown-content p,.questions-container .markdown-content li{color:var(--qb-text)}.questions-container .markdown-content a{color:var(--qb-accent)}.questions-container .markdown-content code:not([class*=language-]){background:var(--qb-accent-light);color:var(--qb-accent);border:1px solid var(--qb-border)}.questions-container .markdown-content pre{background:#00000026;border:none;border-radius:4px}.questions-container .markdown-content pre code{color:var(--qb-text);background:0 0;border:none}.questions-container .markdown-content blockquote{border-left-color:var(--qb-accent);background:var(--qb-accent-light);color:var(--qb-text-muted)}.questions-container .markdown-content strong{color:var(--qb-text)}@media (max-width:1180px){.bank-grid,.answer-panel-content{padding-bottom:max(24px,env(safe-area-inset-bottom,0px))}}
