:root{--bg: #fbfbfd;--bg-card: white;--bg-secondary: #f5f5f7;--bg-hover: #e8e8ed;--text: #1d1d1f;--text-muted: #86868b;--text-muted-2: #acacb0;--border: #d2d2d7;--border-light: #e8e8ed;--border-table: #f0f0f2;--primary: #0071e3;--primary-hover: #0077ed;--success: #34c759;--success-hover: #2db84e;--success-bg: #f0faf0;--error: #ff3b30;--error-hover: #e6352b;--shadow: 0 4px 24px rgba(0, 0, 0, .06);--shadow-sm: 0 2px 12px rgba(0, 0, 0, .04);--shadow-tab: 0 2px 8px rgba(0, 0, 0, .08);--focus-ring: rgba(0, 113, 227, .15);--tab-hover: rgba(0, 0, 0, .04);--disabled: #d2d2d7;--h1: #1d1d1f;--h2: #1d1d1f;--toggle-bg: #d2d2d7;--toggle-knob: white;--toggle-checked: #0071e3;--model-answer-border: #34c759;--model-answer-label: #34c759}[data-theme=dark]{--bg: #2d2a2e;--bg-card: #353236;--bg-secondary: #403e41;--bg-hover: #4a474b;--text: #fcfcfa;--text-muted: #939293;--text-muted-2: #727072;--border: #403e41;--border-light: #403e41;--border-table: #403e41;--primary: #ab9df2;--primary-hover: #ffd866;--success: #a9dc76;--success-hover: #97c768;--success-bg: #2d3a2e;--error: #ff6188;--error-hover: #e6556e;--shadow: 0 4px 24px rgba(0, 0, 0, .3);--shadow-sm: 0 2px 12px rgba(0, 0, 0, .2);--shadow-tab: 0 2px 8px rgba(0, 0, 0, .3);--focus-ring: rgba(171, 157, 242, .3);--tab-hover: rgba(255, 255, 255, .05);--disabled: #403e41;--h1: #ff6188;--h2: #78dce8;--toggle-bg: #403e41;--toggle-knob: #fcfcfa;--toggle-checked: #ab9df2;--model-answer-border: #a9dc76;--model-answer-label: #a9dc76}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,SF Pro Display,SF Pro Text,Helvetica Neue,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.5;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color .3s ease,color .3s ease}.container{max-width:720px;margin:0 auto;padding:40px 20px}h1{text-align:center;margin-bottom:32px;color:var(--h1);font-size:40px;font-weight:600;letter-spacing:-.02em}h2{font-size:24px;font-weight:600;color:var(--h2);margin-bottom:20px;letter-spacing:-.01em}.filters{display:flex;gap:12px;margin-bottom:16px;flex-wrap:wrap;align-items:center}.filters select{padding:12px 16px;border:1px solid var(--border);border-radius:12px;font-size:15px;background:var(--bg-card);color:var(--text);cursor:pointer;transition:border-color .2s ease;min-width:180px}.filters select:hover{border-color:var(--text-muted)}.filters select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--focus-ring)}.filters button{padding:12px 24px;background:var(--primary);color:#fff;border:none;border-radius:980px;font-size:15px;font-weight:500;cursor:pointer;transition:all .3s ease}.filters button:hover{background:var(--primary-hover)}.card{background:var(--bg-card);border-radius:20px;padding:40px;box-shadow:var(--shadow);margin-bottom:24px}.question-text{font-size:19px;margin-bottom:28px;line-height:1.6;color:var(--text);font-weight:400}.answers{display:flex;flex-direction:column;gap:12px}.answer-btn{padding:18px 24px;text-align:left;background:var(--bg-secondary);border:2px solid transparent;border-radius:14px;cursor:pointer;font-size:16px;color:var(--text);transition:all .2s ease;line-height:1.5}.answer-btn:hover{background:var(--bg-hover)}.answer-btn.selected{background:var(--primary);color:#fff;border-color:var(--primary)}.answer-btn.correct{background:var(--success);color:#fff;border-color:var(--success)}.answer-btn.incorrect{background:var(--error);color:#fff;border-color:var(--error)}.answer-btn.show-correct{background:var(--success);color:#fff;border-color:var(--success)}.submit-btn,.next-btn{margin-top:28px;padding:14px 32px;background:var(--primary);color:#fff;border:none;border-radius:980px;font-size:16px;font-weight:500;cursor:pointer;transition:all .3s ease}.submit-btn:hover,.next-btn:hover{background:var(--primary-hover)}.submit-btn:disabled{background:var(--disabled);cursor:not-allowed}.score{text-align:center;font-size:15px;margin-bottom:24px;padding:14px 20px;background:var(--bg-card);border-radius:14px;color:var(--text-muted);box-shadow:var(--shadow-sm)}.score-bar{display:flex;justify-content:center;align-items:center;position:relative}.quit-btn{position:absolute;right:16px;padding:5px 14px;background:transparent;color:var(--text-muted);border:1px solid var(--border);border-radius:980px;font-size:13px;font-weight:500;cursor:pointer;transition:all .2s ease}.quit-btn:hover{color:var(--error);border-color:var(--error)}.progress{text-align:center;color:var(--text-muted);margin-bottom:16px;font-size:14px;font-weight:500}.write-in-answer{margin-top:24px;padding:24px;background:var(--bg-secondary);border-radius:14px;white-space:pre-wrap;line-height:1.6}.hint{text-align:center;color:var(--text-muted);font-size:13px;margin-top:16px}.schedule{margin-top:56px;border-top:1px solid var(--border-light);padding-top:24px;max-width:280px;margin-left:auto;margin-right:auto}.schedule-title{font-size:12px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:12px;text-align:center}.schedule-table{width:100%;font-size:14px;color:var(--text-muted);border-collapse:collapse}.schedule-table td{padding:6px 16px;border-bottom:1px solid var(--border-table)}.schedule-table tr:last-child td{border-bottom:none}.schedule-table td:last-child{text-align:right;color:var(--text-muted-2)}.filter-tabs{display:flex;gap:8px;margin-bottom:24px;background:var(--bg-secondary);padding:4px;border-radius:12px;width:fit-content}.filter-tab{padding:10px 20px;background:transparent;border:none;border-radius:10px;cursor:pointer;font-size:14px;font-weight:500;color:var(--text);transition:all .2s ease}.filter-tab:hover{background:var(--tab-hover)}.filter-tab.active{background:var(--bg-card);box-shadow:var(--shadow-tab);color:var(--text)}.login-card{background:var(--bg-card);border-radius:20px;padding:60px 40px;box-shadow:var(--shadow);text-align:center;margin-top:80px}.login-card h1{margin-bottom:16px}.login-card p{color:var(--text-muted);margin-bottom:32px;font-size:17px}.password-input{display:block;width:100%;max-width:300px;margin:0 auto 16px;padding:12px 16px;font-size:16px;border:2px solid var(--border);border-radius:8px;background:var(--bg-secondary);color:var(--text);text-align:center;box-sizing:border-box}.password-input:focus{outline:none;border-color:var(--primary)}.login-btn{padding:14px 32px;background:var(--primary);color:#fff;border:none;border-radius:980px;font-size:16px;font-weight:500;cursor:pointer;transition:all .3s ease}.login-btn:hover{background:var(--primary-hover)}.user-bar{display:flex;justify-content:flex-end;align-items:center;gap:16px;padding:12px 20px;background:var(--bg-card);border-bottom:1px solid var(--border-light);font-size:14px;color:var(--text-muted)}.logout-btn{padding:8px 16px;background:transparent;color:var(--primary);border:1px solid var(--primary);border-radius:980px;font-size:13px;font-weight:500;cursor:pointer;transition:all .2s ease}.logout-btn:hover{background:var(--primary);color:#fff}.admin-link{padding:8px 16px;background:transparent;color:var(--success);border:1px solid var(--success);border-radius:980px;font-size:13px;font-weight:500;text-decoration:none;transition:all .2s ease}.admin-link:hover{background:var(--success);color:#fff}.theme-toggle-btn{background:transparent;border:1px solid var(--border);border-radius:980px;padding:6px 12px;cursor:pointer;font-size:16px;line-height:1;transition:all .2s ease;color:var(--text);display:flex;align-items:center;gap:6px}.theme-toggle-btn:hover{background:var(--bg-secondary);border-color:var(--text-muted)}.toggle-group{display:flex;gap:24px;margin-top:20px}.toggle-row{display:flex;align-items:center;gap:12px}.toggle{position:relative;display:inline-block;width:50px;height:28px}.toggle input{opacity:0;width:0;height:0}.toggle-slider{position:absolute;cursor:pointer;top:0;left:0;right:0;bottom:0;background-color:var(--toggle-bg);transition:.3s;border-radius:28px}.toggle-slider:before{position:absolute;content:"";height:22px;width:22px;left:3px;bottom:3px;background-color:var(--toggle-knob);transition:.3s;border-radius:50%;box-shadow:0 2px 4px #0000001a}.toggle input:checked+.toggle-slider{background-color:var(--toggle-checked)}.toggle input:checked+.toggle-slider:before{transform:translate(22px)}.toggle-label{font-size:15px;color:var(--text);font-weight:500}.missed-questions{margin-top:28px;text-align:left}.missed-questions h3{font-size:18px;font-weight:600;color:var(--text);margin-bottom:16px}.missed-question{background:var(--bg-secondary);border-radius:14px;padding:20px 24px;margin-bottom:12px}.missed-question-text{font-size:15px;font-weight:500;color:var(--text);margin-bottom:8px;line-height:1.5}.missed-your-answer{font-size:14px;color:var(--error);margin-bottom:4px}.missed-correct-answer{font-size:14px;color:var(--success);font-weight:500}.perfect-score{margin-top:20px;font-size:17px;color:var(--success);font-weight:600;text-align:center}.write-in-input{width:100%;padding:16px;border:1px solid var(--border);border-radius:12px;font-size:15px;font-family:inherit;line-height:1.6;resize:vertical;color:var(--text);background:var(--bg-card);transition:border-color .2s ease}.write-in-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--focus-ring)}.write-in-input::placeholder{color:var(--text-muted)}.write-in-your-answer{background:var(--bg-secondary);border-radius:12px;padding:16px 20px;margin-bottom:12px;font-size:15px;line-height:1.6}.write-in-your-answer strong{display:block;margin-bottom:4px;color:var(--text-muted);font-size:13px;text-transform:uppercase;letter-spacing:.02em}.write-in-model-answer{background:var(--success-bg);border:1px solid var(--model-answer-border);border-radius:12px;padding:16px 20px;font-size:15px;line-height:1.6}.write-in-model-answer strong{display:block;margin-bottom:4px;color:var(--model-answer-label);font-size:13px;text-transform:uppercase;letter-spacing:.02em}.self-grade-buttons{display:flex;gap:12px;margin-top:24px}.grade-btn{flex:1;padding:14px 24px;border:none;border-radius:980px;font-size:16px;font-weight:500;cursor:pointer;transition:all .3s ease}.grade-btn.got-it{background:var(--success);color:#fff}.grade-btn.got-it:hover{background:var(--success-hover)}.grade-btn.missed-it{background:var(--error);color:#fff}.grade-btn.missed-it:hover{background:var(--error-hover)}.admin-tabs{display:flex;justify-content:center;gap:8px;margin-bottom:24px}.editor-toggle-btn{padding:10px 24px;background:var(--bg-secondary);color:var(--text-muted);border:none;border-radius:980px;font-size:14px;font-weight:500;cursor:pointer;transition:all .3s ease}.editor-toggle-btn:hover{background:var(--bg-hover);color:var(--text)}.editor-toggle-btn.active{background:var(--primary);color:#fff}.access-table{width:100%;border-collapse:collapse;font-size:14px}.access-table th{text-align:left;padding:10px 12px;font-size:12px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em;border-bottom:2px solid var(--border-light)}.access-table td{padding:10px 12px;color:var(--text);border-bottom:1px solid var(--border-light)}.access-table tr:last-child td{border-bottom:none}.access-table td:last-child{text-align:center;font-weight:600}.editor-search{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:12px;font-size:15px;background:var(--bg-card);color:var(--text);margin-bottom:16px;font-family:inherit}.editor-search:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--focus-ring)}.question-list-item{display:flex;justify-content:space-between;align-items:center;padding:14px 0;border-bottom:1px solid var(--border-light);gap:12px}.question-list-item:last-child{border-bottom:none}.question-list-text{flex:1;font-size:14px;line-height:1.4;color:var(--text);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.question-list-meta{display:flex;gap:8px;align-items:center;flex-shrink:0}.type-badge{display:inline-block;padding:3px 8px;border-radius:980px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.04em;vertical-align:middle}.type-badge.mc{background:var(--primary);color:#fff}.type-badge.wi{background:var(--success);color:#fff}.editor-btn{padding:6px 14px;border:1px solid var(--border);border-radius:8px;background:var(--bg-card);color:var(--text);font-size:13px;cursor:pointer;transition:all .2s}.editor-btn:hover{background:var(--bg-hover)}.editor-btn:disabled{opacity:.4;cursor:not-allowed}.editor-btn.danger{color:var(--error);border-color:var(--error)}.editor-btn.danger:hover{background:var(--error);color:#fff}.editor-form-group{margin-bottom:20px}.editor-form-group label{display:block;font-size:13px;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.04em;margin-bottom:6px}.editor-form-group input,.editor-form-group select,.editor-form-group textarea{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:12px;font-size:15px;background:var(--bg-secondary);color:var(--text);font-family:inherit}.editor-form-group input:focus,.editor-form-group select:focus,.editor-form-group textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--focus-ring)}.answer-row{display:flex;gap:8px;align-items:center;margin-bottom:8px}.answer-row .letter{font-weight:600;width:24px;text-align:center;color:var(--text-muted);flex-shrink:0}.answer-row input[type=text]{flex:1;padding:10px 14px;border:1px solid var(--border);border-radius:10px;font-size:14px;background:var(--bg-secondary);color:var(--text);font-family:inherit}.answer-row input[type=text]:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px var(--focus-ring)}.answer-row input[type=radio]{width:18px;height:18px;accent-color:var(--success);flex-shrink:0}.pagination{display:flex;justify-content:center;align-items:center;gap:12px;margin-top:20px;font-size:14px;color:var(--text-muted)}