:root{--ink:#26345b;--muted:#606d8d;--primary:#3c519f;--primary-soft:#eaf0fb;--paper:#fafbfe;--line:#e0e5f0;--warning:#8a590a;--warning-soft:#fff4d8;--white:#fff;--accent:#efb543;--brand-red:#e6372d;--danger:#bb2522;--danger-soft:#fff0ef;--radius:18px;font-family:Segoe UI,Arial,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none}
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var(--line);padding:32px 22px;display:flex;flex-direction:column;gap:34px;position:sticky;top:0;height:100vh}.brand{display:flex;gap:10px;align-items:center;color:var(--primary)}.brand-icon{width:35px;height:35px;background:var(--primary);border-radius:10px;display:flex;align-items:flex-end;gap:3px;padding:9px}.brand-icon i{display:block;width:4px;background:#efb543;border-radius:1px}.brand-icon i:nth-child(1){height:7px}.brand-icon i:nth-child(2){height:14px;background:var(--brand-red)}.brand-icon i:nth-child(3){height:10px}.brand-name{font-size:22px;font-weight:750;letter-spacing:-.8px}.brand-sub{font-size:11px;color:var(--muted);margin-top:2px}.nav{display:grid;gap:7px}.nav button{border:0;color:var(--muted);background:transparent;border-radius:10px;display:flex;align-items:center;gap:12px;text-align:left;padding:11px 13px;font-size:14px;font-weight:550}.nav button.active{background:#e7ecfa;color:var(--primary)}.nav 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input{flex:none}.test-controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin-top:24px}.test-controls.complete{grid-template-columns:minmax(0,1fr) minmax(0,1.7fr) minmax(0,1fr)}.test-controls .btn{min-width:0}.test-note{font-size:12px;color:var(--muted);margin-top:20px;text-align:center}.result-card{text-align:center;padding:33px}.result-symbol{width:57px;height:57px;display:grid;place-items:center;background:var(--primary-soft);border-radius:50%;color:var(--primary);font-size:28px;margin:0 auto 19px}.result-score{font-size:55px;font-weight:700;letter-spacing:-2px;margin:18px 0 4px;color:var(--primary)}.result-score span{font-size:25px;color:var(--muted);font-weight:400}.review{margin:15px 0;border:1px solid var(--line);border-radius:13px;background:white;padding:19px}.review summary{cursor:pointer;line-height:1.5;font-size:14px;font-weight:550;min-height:44px}.review summary .tag{margin-right:7px}.review p{font-size:13px;margin-top:13px}.review .explanation{background:#f1f4fc;padding:13px;border-radius:8px;margin-top:15px;line-height:1.65;font-size:13px}.review details{margin:10px 0}.review-nav{display:flex;justify-content:center;gap:10px;margin:24px 0}.answer-summary{list-style:none;padding:0;margin:24px 0}.answer-summary-item{padding:20px 0;border-bottom:1px solid var(--line)}.answer-summary-item:first-child{padding-top:0}.answer-summary-item:last-child{border-bottom:0;padding-bottom:0}.answer-summary-item h3{font-size:16px;line-height:1.5;overflow-wrap:anywhere}.answer-summary-choice{display:flex;align-items:flex-start;gap:16px;margin-top:12px}.answer-summary-choice p{flex:1;min-width:0;font-size:14px;overflow-wrap:anywhere}.answer-summary-choice .btn{flex:none}#toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);background:#26345b;color:white;z-index:50;max-width:calc(100% - 30px);padding:12px 20px;border-radius:10px;font-size:13px;box-shadow:0 5px 25px #0002;display:none}.legend{font-size:11px;color:var(--muted);margin-top:15px}.rules-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.rules-grid p{font-size:13px;color:var(--muted);margin-top:9px}.result-wait{margin-top:20px}.alert-line{display:flex;align-items:center;gap:8px}.row-actions{display:flex;gap:8px;align-items:center}.student-shell .notice{margin-top:20px}.sources{font-size:11px;color:var(--muted);margin-top:20px;line-height:1.7}
@media(min-width:1550px){.content{padding:0 55px 45px}.hero{padding:32px}}
@media(max-width:1150px){.shell{grid-template-columns:195px minmax(0,1fr)}.sidebar{padding:29px 15px}.content{padding:0 25px 35px}.quiz-grid{grid-template-columns:1fr 1fr}.page-head{align-items:flex-start}.head-actions{gap:8px}.two-col{grid-template-columns:1.4fr 1fr}.stat{padding:16px 13px}.stat-label{font-size:11px}.stat-value{font-size:27px}}
@media(max-width:820px){.shell{display:block}.sidebar{display:none}.content{padding:0 20px 95px}.topbar{height:72px}.breadcrumb{display:none}.mobile-brand{display:block}.mobile-brand .brand-icon{width:31px;height:31px}.mobile-brand .brand-name{font-size:21px}.course-tag{font-size:10px}.mobile-nav{position:fixed;bottom:0;left:0;right:0;background:#fafbfff5;backdrop-filter:blur(12px);border-top:1px solid var(--line);display:flex;justify-content:space-around;padding:7px 6px max(7px,env(safe-area-inset-bottom));z-index:10}.mobile-nav button{border:0;background:transparent;color:var(--muted);display:flex;flex-direction:column;align-items:center;gap:4px;font-size:10px;padding:6px 12px;border-radius:8px;min-width:65px}.mobile-nav button.active{color:var(--primary);background:#e7ecfa}.notice{margin:17px 0 23px}.page-head{display:block;margin-bottom:22px}.page-head .head-actions{margin-top:18px}.stats{gap:10px}.two-col{grid-template-columns:1fr 1fr}.footer{margin-top:23px}#toast{bottom:85px}.quiz-grid{grid-template-columns:1fr 1fr}}
@media(max-width:570px){.content{padding:0 16px 92px}h1{font-size:29px}.page-head p{font-size:13px}.hero{display:block;padding:23px}.hero h2{font-size:24px}.session-code{border-left:0;border-top:1px solid #ffffff28;padding:16px 0 0;margin-top:21px;display:flex;align-items:center;justify-content:space-between;gap:15px}.session-code .code{font-size:27px;margin:7px 0 0;letter-spacing:3px}.session-code .btn{margin:0;max-width:125px}.hero .head-actions .btn{font-size:12px;padding:10px 13px}.stats{grid-template-columns:1fr 1fr;margin:18px 0}.stat{padding:17px}.stat-value{font-size:29px}.two-col{grid-template-columns:1fr;gap:16px}.card{padding:20px}.card-head h2{font-size:16px}.question-row{grid-template-columns:28px 1fr 50px;gap:11px;padding:12px}.q-num{width:27px;height:29px}.q-arrow{display:none}.q-text{font-size:12px}.q-percent{font-size:15px}.q-meta{font-size:10px}.tabs{gap:17px}.tabs button{font-size:12px}.toolbar{align-items:stretch;flex-direction:column}.toolbar .search{max-width:none}.quiz-grid{grid-template-columns:1fr}.quiz-card h2{min-height:0}.timeline-card{align-items:flex-start;gap:12px}.timeline-card .btn{font-size:11px;padding:8px 11px}.rules-grid{grid-template-columns:1fr}.footer{display:block;line-height:1.8}.course-tag{max-width:170px;overflow:hidden;text-overflow:ellipsis}.student-shell{padding:20px 16px 30px}.student-hero{margin-top:30px}.student-hero h1{font-size:29px}.join-card{padding:23px}.test-question{padding:21px}.test-question h2{font-size:20px}.answer{font-size:14px;padding:15px 12px}.test-controls .btn{padding:11px 8px}.form-row,.editor-options{grid-template-columns:1fr}dialog{padding:20px}.result-score{font-size:48px}.topbar{gap:10px}.student-top .brand-sub{display:none}.result-card{padding:25px}.timeline-card h3{font-size:14px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}
.brand-icon{flex:none}
.brand-name,.mobile-brand .brand-name{font-size:17px;line-height:1.2;letter-spacing:-.4px;max-width:143px}
@media(min-width:821px) and (max-width:1150px){.sidebar .brand-name{font-size:16px;max-width:120px}.sidebar .brand-sub{font-size:10px}}
@media(max-width:570px){.course-tag{min-width:0;max-width:120px}.mobile-brand{flex:none}.student-top{gap:10px;align-items:flex-start}.student-top .button-link{max-width:90px;flex:none;text-align:right;line-height:1.4}}

.personal-code{overflow-wrap:anywhere;font-size:12px}.mobile-nav button{min-width:0;flex:1;padding-left:4px;padding-right:4px}.student-top a{flex:none}#participants-form textarea{min-height:150px}

.teacher-tools{display:flex;align-items:center;gap:12px}@media(max-width:570px){.teacher-tools .course-tag{display:none}}

.btn.danger{background:var(--danger-soft);border-color:#e8b7b5;color:var(--danger)}