:root{--cbt-steel-blue: #334155;--cbt-steel-blue-dark: #1e293b;--cbt-bg-light: #f8fafc;--cbt-sidebar-bg: #f1f5f9;--cbt-border-color: #cbd5e1;--cbt-text-main: #334155;--cbt-text-muted: #64748b;--cbt-timer-bg: #0f172a;--cbt-timer-green: #10b981;--cbt-timer-red: #ef4444;--cbt-color-not-visited: #e2e8f0;--cbt-color-not-answered: #e53e3e;--cbt-color-answered: #38a169;--cbt-color-marked: #805ad5}*{box-sizing:border-box;margin:0;padding:0;font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,sans-serif}body{background-color:var(--cbt-bg-light);color:var(--cbt-text-main);font-size:13px;overflow:hidden;height:100vh;width:100vw}.landing-container{display:flex;justify-content:center;align-items:center;min-height:100vh;width:100vw;background:var(--cbt-sidebar-bg);padding:20px}.landing-card{background:#fff;border:1px solid var(--cbt-border-color);border-radius:8px;padding:40px;max-width:600px;width:100%;box-shadow:0 4px 12px #0000000d;text-align:center}.landing-title{color:var(--cbt-steel-blue);font-size:26px;font-weight:700;margin-bottom:16px;letter-spacing:-.5px}.landing-desc{color:var(--cbt-text-muted);font-size:13px;line-height:1.6;margin-bottom:30px}.landing-features{text-align:left;margin-bottom:35px;background:var(--cbt-bg-light);border:1px solid var(--cbt-border-color);border-radius:6px;padding:20px}.feature-item{display:flex;gap:12px;align-items:flex-start;color:var(--cbt-text-main);margin-bottom:15px;font-size:12px}.feature-item:last-child{margin-bottom:0}.feature-icon{font-size:18px}.landing-btn{width:100%;padding:14px;font-size:14px;font-weight:600;background:var(--cbt-steel-blue);color:#fff;border:none;border-radius:4px;cursor:pointer;transition:background .2s}.landing-btn:hover{background:var(--cbt-steel-blue-dark)}.setup-container{display:flex;justify-content:center;align-items:center;min-height:100vh;width:100vw;background:var(--cbt-sidebar-bg);padding:20px}.setup-card{background:#fff;border:1px solid var(--cbt-border-color);border-radius:8px;padding:35px;max-width:550px;width:100%;box-shadow:0 4px 12px #0000000d}.setup-title{color:var(--cbt-steel-blue);font-size:20px;margin-bottom:8px;font-weight:700}.setup-desc{color:var(--cbt-text-muted);margin-bottom:25px;font-size:12px}.setup-details{display:flex;flex-direction:column;gap:18px;margin-bottom:30px}.setup-field-group{display:flex;flex-direction:column;gap:6px}.setup-field-group label{color:var(--cbt-text-main);font-weight:700;font-size:11px;text-transform:uppercase;letter-spacing:.5px}.setup-field-group input{background:var(--cbt-bg-light);border:1px solid var(--cbt-border-color);border-radius:4px;padding:10px 12px;color:var(--cbt-text-main);font-size:12px;outline:none;font-family:monospace}.setup-field-group small{color:var(--cbt-text-muted);font-size:11px}.setup-input-copy-wrapper{display:flex;gap:8px}.setup-input-copy-wrapper input{flex:1}.cbt-copy-btn{background:var(--cbt-steel-blue);color:#fff;border:none;border-radius:4px;padding:0 16px;cursor:pointer;font-weight:600;font-size:12px;transition:background .2s}.cbt-copy-btn:hover{background:var(--cbt-steel-blue-dark)}.setup-btn{width:100%;padding:14px;background:var(--cbt-steel-blue);color:#fff;border:none;border-radius:4px;font-weight:600;font-size:14px;cursor:pointer;transition:background .2s}.setup-btn:hover{background:var(--cbt-steel-blue-dark)}.cbt-btn{border:none;border-radius:4px;padding:10px 20px;font-size:14px;font-weight:600;cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;justify-content:center}.cbt-btn-primary{background:var(--cbt-steel-blue);color:#fff}.cbt-btn-primary:hover{background:var(--cbt-steel-blue-dark)}.cbt-btn-secondary{background:#e2e8f0;color:#4a5568;border:1px solid var(--cbt-border-color)}.cbt-btn-secondary:hover:not(:disabled){background:#cbd5e1}.cbt-btn-secondary:disabled{opacity:.5;cursor:not-allowed}.cbt-btn-purple{background:#805ad5;color:#fff}.cbt-btn-purple:hover{background:#6b46c1}.cbt-btn-submit{background:#dd6b20;color:#fff}.cbt-btn-submit:hover{background:#c05621}.cbt-split-layout{display:flex;height:100vh;width:100vw;overflow:hidden}.cbt-split-left{width:25%;min-width:320px;height:100%;background:var(--cbt-sidebar-bg);border-right:2px solid var(--cbt-border-color);display:flex;flex-direction:column}.cbt-split-right{flex:1;height:100%;background:var(--cbt-bg-light);display:flex;flex-direction:column;position:relative}.cbt-config-panel{display:flex;flex-direction:column;height:100%;color:var(--cbt-text-main)}.cbt-config-panel-header{padding:16px;border-bottom:1px solid var(--cbt-border-color);background:#e2e8f0}.cbt-config-panel-header h4{font-size:13px;font-weight:700;margin-bottom:4px;color:var(--cbt-steel-blue)}.cbt-config-desc{font-size:11px;color:var(--cbt-text-muted);line-height:1.4}.cbt-url-fields{padding:12px 16px;background:var(--cbt-bg-light);border-bottom:1px solid var(--cbt-border-color);display:flex;flex-direction:column;gap:8px}.cbt-url-field-group{display:flex;flex-direction:column;gap:2px}.cbt-url-field-group label{font-size:9px;font-weight:700;text-transform:uppercase;color:var(--cbt-text-muted);letter-spacing:.5px}.cbt-url-field-group input{background:#fff;border:1px solid var(--cbt-border-color);padding:6px 8px;border-radius:4px;color:var(--cbt-text-main);font-size:11px;outline:none;font-family:monospace}.cbt-iframe-container{flex:1;background:#fff;position:relative}.cbt-generator-iframe{width:100%;height:100%;border:none}.cbt-config-panel-footer{padding:12px 16px;background:#e2e8f0;border-top:1px solid var(--cbt-border-color)}.cbt-status-indicator{display:flex;align-items:center;gap:8px}.cbt-status-dot{width:8px;height:8px;border-radius:50%;background:#e53e3e}.cbt-status-dot.active{background:#38a169;box-shadow:0 0 8px #38a169;animation:pulse 2s infinite}.cbt-status-text{font-size:11px;color:var(--cbt-text-muted)}@keyframes pulse{0%{opacity:.6}50%{opacity:1}to{opacity:.6}}.gen-page{padding:20px;color:var(--cbt-text-main);height:100%;overflow-y:auto;background:var(--cbt-bg-light)}.gen-form h3{font-size:14px;margin-bottom:15px;border-bottom:1px solid var(--cbt-border-color);padding-bottom:8px;color:var(--cbt-steel-blue);font-weight:700}.gen-field{display:flex;flex-direction:column;gap:6px;margin-bottom:15px}.gen-field label{font-size:11px;color:var(--cbt-text-muted);font-weight:600}.gen-field select{background:#fff;border:1px solid var(--cbt-border-color);border-radius:4px;padding:8px;color:var(--cbt-text-main);font-size:12px;outline:none}.gen-submit-btn{background:var(--cbt-steel-blue);color:#fff;border:none;border-radius:4px;padding:10px;width:100%;cursor:pointer;font-weight:600;font-size:12px;transition:background .2s;margin-top:10px}.gen-submit-btn:hover{background:var(--cbt-steel-blue-dark)}.gen-submit-btn:disabled{background:#cbd5e1;color:#94a3b8;cursor:not-allowed}.gen-status{margin-top:15px;padding:10px;border-radius:4px;font-size:11px;line-height:1.4}.gen-status.success{background:#38a1691a;border:1px solid rgba(56,161,105,.3);color:#2f855a}.gen-status.error{background:#e53e621a;border:1px solid rgba(229,62,98,.3);color:#c53030}.cbt-exam-wrapper{display:flex;flex-direction:column;height:100%;position:relative}.cbt-arrived-alert{background:#ebf8ff;border-bottom:1px solid #90cdf4;padding:10px 16px;display:flex;justify-content:space-between;align-items:center;z-index:10}.cbt-arrived-alert .alert-text{color:#2b6cb0;font-weight:600}.cbt-arrived-alert .alert-close{background:none;border:none;font-size:18px;cursor:pointer;color:#2b6cb0}.cbt-header{background:var(--cbt-steel-blue);color:#fff;padding:10px 24px;display:flex;justify-content:space-between;align-items:center;height:56px;border-bottom:2px solid var(--cbt-steel-blue-dark)}.cbt-exam-name{font-size:15px;font-weight:700}.cbt-header-right{display:flex;align-items:center;gap:20px}.cbt-timer-container{display:flex;align-items:center;gap:8px;background:var(--cbt-timer-bg);padding:6px 12px;border-radius:4px;border:1px solid rgba(255,255,255,.1)}.cbt-timer-label{font-size:13px;color:#cbd5e0}.cbt-timer-val{font-family:monospace;font-size:16px;font-weight:700;color:var(--cbt-timer-green)}.cbt-timer-val.cbt-timer-low{color:var(--cbt-timer-red);animation:blink 1s step-end infinite}@keyframes blink{50%{opacity:.5}}.cbt-candidate-info{display:flex;align-items:center;gap:10px;cursor:pointer;position:relative;-webkit-user-select:none;user-select:none}.cbt-candidate-text{display:flex;flex-direction:column;text-align:right}.cbt-candidate-name{font-size:13px;font-weight:700}.cbt-candidate-id{font-size:11px;color:#cbd5e0}.cbt-avatar{background:var(--cbt-border-color);color:var(--cbt-steel-blue);border-radius:4px;width:34px;height:34px;display:flex;align-items:center;justify-content:center}.cbt-lang-dropdown{position:absolute;top:42px;right:0;background:#fff;color:#333;border:1px solid var(--cbt-border-color);border-radius:4px;box-shadow:0 4px 10px #0000001a;width:140px;z-index:100}.cbt-lang-header{font-size:11px;font-weight:700;text-transform:uppercase;color:var(--cbt-text-muted);padding:6px 8px;border-bottom:1px solid var(--cbt-border-color)}.cbt-lang-option{padding:8px;cursor:pointer;font-size:12px}.cbt-lang-option:hover{background:var(--cbt-bg-light)}.cbt-lang-selected{font-size:10px;color:var(--cbt-text-muted);padding:6px 8px;background:#e2e8f0;border-top:1px solid var(--cbt-border-color);text-align:center}.cbt-section-tabs{background:#e2e8f0;border-bottom:1px solid var(--cbt-border-color);display:flex;padding:6px 10px 0}.cbt-section-tab{background:#cbd5e1;border:1px solid var(--cbt-border-color);border-bottom:none;padding:8px 18px;font-size:13px;font-weight:600;color:var(--cbt-text-main);cursor:pointer;border-top-left-radius:4px;border-top-right-radius:4px;margin-right:4px}.cbt-section-tab-active{background:var(--cbt-bg-light);color:var(--cbt-steel-blue);border-bottom:1px solid 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var(--cbt-border-color);padding-bottom:8px;margin-bottom:12px}.cbt-palette-header h3{font-size:12px;color:var(--cbt-steel-blue)}.cbt-palette-sec-title{font-size:10px;color:var(--cbt-text-muted);font-weight:600}.cbt-palette-grid-container{max-height:130px;overflow:scroll;padding-right:4px}.cbt-palette-grid-container::-webkit-scrollbar{width:5px}.cbt-palette-grid-container::-webkit-scrollbar-track{background:transparent}.cbt-palette-grid-container::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:3px}.cbt-palette-grid-container::-webkit-scrollbar-thumb:hover{background:#94a3b8}.cbt-palette-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;justify-items:center;width:100%}.cbt-palette-empty{font-size:11px;color:var(--cbt-text-muted);text-align:center;margin-top:30px}.cbt-palette-tile{width:56px;height:56px;border:none;font-size:17px;font-weight:700;cursor:pointer;position:relative;display:flex;align-items:center;justify-content:center}.cbt-palette-tile-active{box-shadow:0 0 0 2px var(--cbt-steel-blue)!important;z-index:2}.cbt-tile-number{pointer-events:none}.cbt-tile-not-visited{background:var(--cbt-color-not-visited);color:var(--cbt-text-main);border:1px solid var(--cbt-border-color);border-radius:6px}.cbt-tile-not-answered{background:var(--cbt-color-not-answered);color:#fff;border-radius:18px 18px 6px 6px}.cbt-tile-answered{background:var(--cbt-color-answered);color:#fff;border-radius:6px 6px 18px 18px}.cbt-tile-marked,.cbt-tile-answered-marked{background:var(--cbt-color-marked);color:#fff;border-radius:50%;width:56px;height:56px;margin:0 auto}.cbt-tile-dot{position:absolute;bottom:0;right:0;width:12px;height:12px;border-radius:50%;background:#38a169;border:1.5px solid #fff}.cbt-question-pane{flex:1;background:#fff;display:flex;flex-direction:column;position:relative;overflow:hidden}.cbt-question-pane-header{background:#e2e8f0;border-bottom:1px solid var(--cbt-border-color);padding:10px 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.2s}.cbt-scroll-btn:hover{background:var(--cbt-steel-blue-dark)}.cbt-question-content-container{flex:1;padding:24px;overflow:scroll;position:relative}.cbt-question-stem{margin-bottom:25px;line-height:1.6;font-size:18px;color:var(--cbt-text-main)}.cbt-question-stem p{margin-bottom:12px}.cbt-question-options{display:flex;flex-direction:column;gap:12px}.cbt-option-wrapper{display:flex;align-items:flex-start;padding:8px 0;cursor:default}.cbt-option-wrapper:hover{background:none;border-color:transparent}.cbt-option-selected{background:transparent!important;border-color:transparent!important}.cbt-option-input-container{display:flex;align-items:center;gap:10px;margin-right:12px;margin-top:4px}.cbt-option-input-container 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16px;font-size:12px;line-height:1.6;color:var(--cbt-text-main)}.cbt-modal-warning{color:#e53e3e;font-weight:700;margin-bottom:10px}.cbt-modal-footer{background:#e2e8f0;padding:12px 16px;border-top:1px solid var(--cbt-border-color);display:flex;justify-content:flex-end;gap:8px}.cbt-btn-submit-confirm{background:#e53e3e;color:#fff}.cbt-btn-submit-confirm:hover{background:#c53030}.cbt-enlarge-modal-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:#0f172acc;display:flex;align-items:center;justify-content:center;z-index:2000;cursor:zoom-out}.cbt-enlarge-modal-content{background:#fff;border-radius:8px;padding:24px;max-width:80%;max-height:80%;display:flex;flex-direction:column;position:relative;cursor:default;box-shadow:0 10px 25px #0000001a;border:1px solid var(--cbt-border-color)}.cbt-enlarge-modal-close{position:absolute;top:8px;right:12px;font-size:24px;background:none;border:none;cursor:pointer;color:var(--cbt-text-muted)}.cbt-enlarge-modal-body{display:flex;align-items:center;justify-content:center;overflow:auto}.cbt-enlarge-modal-body svg{max-width:100%;max-height:60vh;height:auto!important;width:auto!important}.cbt-enlarge-modal-caption{font-size:11px;color:var(--cbt-text-muted);text-align:center;margin-top:12px;font-weight:600}.cbt-summary-container{display:flex;justify-content:center;align-items:center;min-height:100vh;width:100vw;background:var(--cbt-sidebar-bg);padding:20px;overflow-y:auto}.cbt-summary-card{background:#fff;border:1px solid var(--cbt-border-color);border-radius:8px;max-width:750px;width:100%;padding:30px;box-shadow:0 4px 10px #00000008}.cbt-summary-header{border-bottom:2px solid var(--cbt-border-color);padding-bottom:15px;margin-bottom:20px;text-align:center}.cbt-summary-header h2{font-size:22px;color:var(--cbt-steel-blue);font-weight:700}.cbt-summary-subtitle{color:var(--cbt-text-muted);font-size:12px}.cbt-summary-stats-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-bottom:25px}.cbt-stat-box{background:var(--cbt-bg-light);border:1px solid var(--cbt-border-color);border-radius:6px;padding:12px;text-align:center;display:flex;flex-direction:column;justify-content:center}.cbt-stat-num{font-size:20px;font-weight:700;color:var(--cbt-text-main)}.cbt-stat-label{font-size:9px;color:var(--cbt-text-muted);text-transform:uppercase;margin-top:4px}.cbt-stat-box.status-answered{background:#38a1691a;border-color:#38a1694d}.cbt-stat-box.status-answered .cbt-stat-num{color:#2f855a}.cbt-stat-box.status-not-answered{background:#e53e621a;border-color:#e53e624d}.cbt-stat-box.status-not-answered .cbt-stat-num{color:#c53030}.cbt-stat-box.status-marked{background:#805ad51a;border-color:#805ad54d}.cbt-stat-box.status-marked 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