@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;650;700;800&display=swap');
:root{color-scheme:dark;--bg:#070b12;--panel:#0e1521;--line:#202d40;--muted:#91a0b6;--text:#edf3fc;--blue:#77b7ff;--bright:#9cd4ff;font-family:Manrope,Arial,sans-serif;font-size:15px}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);height:100dvh;overflow:hidden}button,a{-webkit-tap-highlight-color:transparent}button,input{font:inherit}button,a{touch-action:manipulation}button{cursor:pointer}a{color:inherit;text-decoration:none}button:disabled{opacity:.38;cursor:not-allowed}button:focus-visible,a:focus-visible{outline:2px solid var(--bright);outline-offset:4px}button{color:inherit}h1,h2,h3,p{margin:0}h1,h2{letter-spacing:-.04em}p{line-height:1.75}.ambient{position:fixed;inset:0;pointer-events:none;background:radial-gradient(ellipse at 82% 25%,#0d28412d,transparent 55%),radial-gradient(ellipse at 5% 90%,#17395a20,transparent 50%)}.app{position:relative;max-width:1350px;margin:auto;padding:0 48px;height:100dvh;display:grid;grid-template-rows:82px auto minmax(0,1fr) 38px}.topbar{display:flex;align-items:center;border-bottom:1px solid var(--line);gap:28px}.brand{font-weight:800;font-size:24px;letter-spacing:-1.1px;line-height:1}.brand span{display:block;letter-spacing:4.6px;font-size:8px;color:var(--blue);margin-top:6px}.course-label{color:var(--muted);font-size:10px;letter-spacing:2px;border-left:1px solid var(--line);padding-left:26px}.course-label b{color:var(--blue)}.account{margin-left:auto;display:flex;align-items:center;gap:18px;font-size:11px;color:var(--muted)}.admin-entry:hover{color:var(--text)}footer{display:flex;align-items:center;justify-content:space-between;color:#63748e;letter-spacing:1.5px;font-size:8px;border-top:1px solid #152033}.quiet{background:none;border:0;padding:5px 0;color:var(--muted);font-size:11px}.quiet:hover{color:var(--text)}#screen{min-height:0;outline:none;display:flex;flex-direction:column;padding:24px 0 20px}.loading{margin:auto;display:flex;gap:14px;align-items:center;color:var(--muted)}.spinner{display:inline-block;width:18px;height:18px;border:1px solid var(--line);border-top-color:var(--blue);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.notice{background:#301b2c;border:1px solid #805078;border-radius:8px;padding:9px 14px;font-size:12px;margin-top:9px;display:flex;align-items:center;justify-content:space-between;gap:15px}.notice[hidden]{display:none}.notice button{background:none;border:0;color:inherit}.eyebrow{color:var(--blue);font-size:9px;letter-spacing:2.2px;font-weight:700;text-transform:uppercase}.muted{color:var(--muted)}.button{display:inline-flex;justify-content:center;align-items:center;gap:18px;background:var(--blue);color:#071321;border:1px solid var(--blue);padding:13px 20px;border-radius:8px;font-weight:750;font-size:12px;line-height:1.4}.button:hover{background:var(--bright)}.button.secondary{background:transparent;color:var(--text);border-color:#33445e}.button.secondary:hover{background:#19263a}.button.sm{padding:9px 14px;font-size:11px}.login{display:grid;grid-template-columns:1.2fr 1fr;align-items:center;height:100%;gap:50px}.login h1{font-size:clamp(48px,6.1vw,88px);line-height:.98;font-weight:800;margin:24px 0}.login h1 span{display:block;color:var(--blue);font-weight:500}.login .lead{font-size:14px;color:var(--muted);max-width:405px}.login-action{margin:28px 0 14px;min-width:245px}.login-action svg{width:18px;fill:currentColor}.login-hint{font-size:10px;line-height:1.8;color:#7e90aa;max-width:400px}.orbit{position:relative;width:100%;aspect-ratio:1;max-height:460px;display:flex;align-items:center;justify-content:center}.orbit svg{width:100%;max-height:460px}.orbit:after{content:'FIZIKA 0–A+';position:absolute;bottom:6%;font-size:9px;letter-spacing:4px;color:var(--muted)}.login-metrics{display:flex;gap:30px;margin-top:36px}.login-metrics div{font-size:9px;color:var(--muted)}.login-metrics b{display:block;font-size:19px;color:var(--text);margin-bottom:4px}.pending{margin:20px 0 0;border-left:2px solid var(--blue);padding:0 0 0 18px;max-width:400px}.pending-code{font-size:30px;letter-spacing:7px;margin:6px 0 10px;font-weight:800}.pending p{font-size:11px;color:var(--muted)}.pending-actions{display:flex;align-items:center;gap:16px;margin-top:13px}.screen-head{display:flex;align-items:center;justify-content:space-between;gap:25px;margin-bottom:20px;flex-shrink:0}.screen-head h1{font-size:clamp(23px,3vw,36px);margin-top:5px}.screen-head p{color:var(--muted);font-size:11px;margin-top:7px}.progress-mini{min-width:150px;text-align:right;font-size:10px;color:var(--muted)}.progress-mini b{font-size:21px;color:var(--text)}.progress-track{height:3px;background:#1a2638;margin-top:10px;width:150px}.progress-track span{display:block;background:var(--blue);height:100%}.section-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-template-rows:repeat(2,minmax(0,1fr));gap:13px;flex:1;min-height:0}.section-card{background:linear-gradient(120deg,#101b2b,#0b111b);border:1px solid #25334a;border-radius:12px;text-align:left;padding:20px;position:relative;display:flex;flex-direction:column;transition:border-color .2s,background .2s}.section-card:hover{border-color:#668db9;background:#142139}.section-top{display:flex;justify-content:space-between;align-items:center;color:#6b839e;font-size:9px;letter-spacing:1.5px}.section-glyph{color:var(--blue);font-family:Georgia,serif;font-size:33px;font-style:italic}.section-card h2{font-size:18px;line-height:1.3;margin:auto 25px 10px 0;letter-spacing:-.3px}.section-card p{color:var(--muted);font-size:10px;line-height:1.5}.section-bottom{display:flex;justify-content:space-between;align-items:center;font-size:9px;color:var(--blue);margin-top:14px}.section-arrow{position:absolute;right:19px;bottom:22px;font-size:23px;color:var(--muted)}.diagnostic-banner{display:flex;align-items:center;gap:20px;text-align:left;border:1px solid #325a88;border-radius:10px;background:#10243b70;padding:17px 22px;margin-top:14px;flex-shrink:0}.diagnostic-icon{font-size:25px;color:var(--blue)}.diagnostic-banner h2{font-size:15px;letter-spacing:-.3px}.diagnostic-banner p{color:var(--muted);font-size:10px;margin-top:4px}.diagnostic-banner .arrow{margin-left:auto;color:var(--blue);font-size:22px}.back{display:inline-flex;align-items:center;gap:8px;margin-bottom:8px}.list{display:flex;flex-direction:column;gap:8px;flex:1;min-height:0}.lesson-row{border:1px solid var(--line);background:var(--panel);border-radius:9px;padding:12px 17px;display:grid;grid-template-columns:30px 1fr auto;gap:15px;align-items:center;text-align:left;flex:1;min-height:0}.lesson-row:not(:disabled):hover{border-color:#5c86b7;background:#122039}.lesson-row:disabled{opacity:.62}.lesson-row .num{font-size:12px;color:#73879f}.lesson-row h2{font-size:14px;letter-spacing:-.2px;font-weight:650;line-height:1.35}.lesson-row small{display:block;font-size:9px;color:var(--muted);margin-top:5px}.status{font-size:9px;color:var(--muted);white-space:nowrap}.status.open,.status.passed{color:var(--blue)}.pager{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:15px;font-size:10px;color:var(--muted);flex-shrink:0}.pager-actions{display:flex;gap:9px}.search{background:#0b131f;border:1px solid #2d405d;border-radius:7px;color:var(--text);padding:10px 12px;width:230px;font-size:11px}.panel{background:linear-gradient(140deg,#111d2e,#0b111c);border:1px solid var(--line);border-radius:13px;padding:30px 38px;flex:1;min-height:0;display:flex;flex-direction:column;position:relative}.read-content{margin:auto 0;overflow:auto;max-height:100%;padding:14px 0;scrollbar-width:thin;scrollbar-color:#385475 transparent}.read-content h2{font-size:25px;line-height:1.35;margin:8px 0 18px}.read-content p{font-size:14px;color:#bac8da;line-height:1.9;max-width:920px}.read-content .formula-expression{font-size:clamp(24px,4vw,42px);color:var(--bright);font-family:Georgia,serif;padding:16px 0 23px;line-height:1.45;overflow-wrap:anywhere}.formula-units{font-size:11px!important;padding-top:15px;color:#93b4d8!important}.rule-note{border-left:2px solid #4978ad;padding-left:16px;margin-top:22px;font-size:12px!important;color:var(--blue)!important}.page-position{display:flex;justify-content:space-between;gap:10px;font-size:9px;letter-spacing:1px;color:var(--muted);margin-bottom:10px}.reading-nav{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-top:15px;flex-shrink:0}.reading-nav>span{color:var(--muted);font-size:10px}.exam-top{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:14px;font-size:10px;color:var(--muted)}.timer{font-size:19px;letter-spacing:1px;font-weight:800;color:var(--blue);font-variant-numeric:tabular-nums}.timer.urgent{color:#ffb7c8}.question-area{display:flex;flex-direction:column;justify-content:center;flex:1;min-height:0;overflow:auto;scrollbar-width:thin}.question-area h2{font-size:clamp(17px,2vw,25px);line-height:1.55;margin:12px 0 22px;letter-spacing:-.3px}.options{display:grid;grid-template-columns:1fr 1fr;gap:10px}.option{display:flex;align-items:center;gap:16px;border:1px solid #304259;background:#0c1522;border-radius:8px;padding:15px;text-align:left;font-size:14px}.option span:first-child{color:var(--muted);font-size:10px}.option[aria-pressed=true]{background:#15365b;border-color:#7cbcff}.option[aria-pressed=true] span:first-child{color:var(--blue)}.exam-bottom{display:flex;align-items:center;gap:10px;justify-content:space-between;margin-top:17px;flex-shrink:0}.exam-bottom .quiet{font-size:10px}.exam-progress{height:3px;background:#1c2b40;margin-bottom:6px}.exam-progress span{display:block;height:100%;background:var(--blue)}.question-map{display:flex;flex-wrap:wrap;gap:6px;margin:auto 0}.question-map button{width:42px;height:38px;border:1px solid #2d4059;background:#0c1521;border-radius:5px;font-size:11px}.question-map button.answered{background:#173c63;border-color:#729ecc}.question-map button[aria-current]{outline:2px solid var(--blue)}.result-hero{display:flex;align-items:center;gap:36px;margin:auto 0}.result-number{font-size:90px;font-weight:800;letter-spacing:-5px;color:var(--blue);line-height:1}.result-hero h2{font-size:30px;margin-bottom:15px}.result-hero p{font-size:13px;color:var(--muted);max-width:640px}.result-actions{display:flex;gap:10px;margin-top:24px;flex-wrap:wrap}.score-line{display:flex;gap:18px;font-size:11px;color:var(--muted);margin-top:20px}.review-answer{margin:15px 0;color:var(--blue);font-size:13px}.review-answer.wrong{color:#f3bbd1}.level-table{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin:24px 0}.level-table div{border:1px solid var(--line);background:#101e30;padding:14px 8px;text-align:center;border-radius:7px;font-size:10px;color:var(--muted)}.level-table b{display:block;font-size:20px;color:var(--blue);margin-bottom:8px}.info-columns{display:grid;grid-template-columns:1fr 1fr;gap:30px}.source-links{font-size:11px;line-height:2;max-height:150px;overflow:auto}.source-links a{color:var(--blue);display:block}.info-columns p{font-size:12px;color:var(--muted)}#toast{position:fixed;bottom:50px;left:50%;transform:translateX(-50%);background:#1a3049;border:1px solid #496d95;border-radius:8px;font-size:12px;padding:12px 20px;opacity:0;pointer-events:none;transition:opacity .2s;z-index:20}#toast.visible{opacity:1}noscript{position:fixed;bottom:40px;background:#213550;padding:20px}
@media(min-height:850px){#screen{padding-top:38px;padding-bottom:30px}.screen-head{margin-bottom:30px}.section-card{padding:28px}.section-card h2{font-size:22px}.section-card p{font-size:12px}.section-bottom{font-size:10px}.diagnostic-banner{padding:22px}}
@media(max-width:850px){.app{padding:0 24px;grid-template-rows:70px auto minmax(0,1fr) 32px}.section-card{padding:16px}.section-card h2{font-size:16px}.section-card p{display:none}.section-top{font-size:8px}.section-grid{gap:10px}.login{gap:15px}.panel{padding:22px 25px}.screen-head{gap:15px}.screen-head h1{font-size:25px}.search{width:180px}}
@media(max-width:600px){:root{font-size:14px}.app{padding:0 16px;grid-template-rows:62px auto minmax(0,1fr) 28px}.brand{font-size:21px}.brand span{font-size:7px;letter-spacing:4px}.topbar{gap:16px}.course-label{padding-left:14px;font-size:8px;letter-spacing:1px}.account{gap:10px;font-size:9px}.account-name{max-width:88px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.account .quiet{font-size:9px}#screen{padding:17px 0 13px}footer{font-size:6px;letter-spacing:1px}footer .quiet{font-size:9px}.login{display:flex;flex-direction:column;justify-content:center;align-items:stretch;gap:0}.orbit{display:none}.login h1{font-size:60px;margin:22px 0}.login .lead{font-size:12px;max-width:320px}.login-action{margin-top:24px}.login-metrics{gap:32px;margin-top:24px}.login-metrics b{font-size:18px}.login-hint{font-size:9px}.login .eyebrow{font-size:8px}.screen-head{margin-bottom:14px;align-items:flex-start;gap:12px}.screen-head h1{font-size:22px}.screen-head p{font-size:10px;margin-top:6px}.screen-head .eyebrow{font-size:8px}.progress-mini{min-width:70px;font-size:8px}.progress-mini b{font-size:18px}.progress-track{width:70px}.section-grid{grid-template-columns:1fr 1fr;grid-template-rows:repeat(3,minmax(0,1fr));gap:8px}.section-card{padding:11px 13px;border-radius:9px}.section-card h2{font-size:14px;margin:3px 10px 5px 0}.section-glyph{font-size:23px}.section-top{font-size:7px}.section-bottom{font-size:8px;margin-top:auto}.section-arrow{right:12px;bottom:10px;font-size:18px}.diagnostic-banner{padding:12px 14px;gap:12px;margin-top:10px}.diagnostic-banner h2{font-size:12px}.diagnostic-banner p{font-size:8px}.diagnostic-icon{font-size:21px}.search{width:120px;font-size:10px;padding:9px}.lesson-row{padding:9px 10px;gap:8px;grid-template-columns:22px 1fr auto}.lesson-row h2{font-size:12px}.lesson-row small{font-size:8px;margin-top:4px}.lesson-row .num{font-size:10px}.status{font-size:7px}.pager{font-size:9px;margin-top:10px}.panel{padding:17px 18px;border-radius:9px}.read-content h2{font-size:20px;margin:8px 0 14px}.read-content p{font-size:12px;line-height:1.85}.read-content .formula-expression{font-size:27px;padding:8px 0 15px}.formula-units{font-size:10px!important}.rule-note{font-size:11px!important;margin-top:16px;padding-left:10px}.reading-nav{gap:10px;margin-top:12px}.reading-nav>span{font-size:8px}.button{font-size:11px;padding:12px 15px;gap:10px}.button.sm{font-size:9px;padding:9px 11px}.page-position{font-size:8px}.exam-top{font-size:8px;gap:12px}.question-area h2{font-size:16px;margin:8px 0 18px;line-height:1.6}.options{grid-template-columns:1fr;gap:8px}.option{padding:11px 13px;font-size:12px;gap:12px}.timer{font-size:17px}.exam-bottom{gap:7px;margin-top:12px}.exam-bottom .quiet{font-size:9px}.question-map{gap:5px}.question-map button{width:35px;height:32px;font-size:10px}.result-hero{gap:20px;flex-direction:column;align-items:flex-start}.result-number{font-size:68px}.result-hero h2{font-size:24px}.result-hero p{font-size:12px}.result-actions{gap:8px;margin-top:16px}.score-line{font-size:9px;gap:12px;margin-top:14px}.level-table{grid-template-columns:repeat(3,1fr);gap:6px;margin:16px 0}.level-table div{padding:8px;font-size:8px}.level-table b{font-size:17px;margin-bottom:5px}.info-columns{grid-template-columns:1fr;gap:20px}.source-links{max-height:110px}.pending-code{font-size:25px}.pending p{font-size:10px}.pending{margin-top:15px}.pending-actions{gap:13px}.pending-actions .quiet{font-size:10px}}
@media(max-height:660px){.app{grid-template-rows:56px auto minmax(0,1fr) 25px}#screen{padding:10px 0}.screen-head{margin-bottom:10px}.screen-head h1{font-size:22px}.screen-head p{margin-top:4px}.section-card{padding:10px 13px}.section-glyph{font-size:21px}.section-card h2{font-size:14px;margin-bottom:4px}.section-bottom{margin-top:5px}.diagnostic-banner{padding:10px 14px;margin-top:9px}.panel{padding:15px 22px}.read-content h2{font-size:20px;margin-bottom:10px}.read-content p{font-size:12px}.question-area h2{font-size:17px;margin:6px 0 12px}.option{padding:10px 13px}.exam-bottom{margin-top:10px}.login h1{font-size:52px;margin:16px 0}.login-metrics{margin-top:18px}.login-action{margin-top:18px}.login .lead{font-size:12px}.login-metrics b{font-size:17px}.login-hint{font-size:9px}.pending-code{font-size:22px;margin:4px 0}.pending{margin-top:10px}.result-number{font-size:60px}.result-hero h2{font-size:24px}.result-actions{margin-top:14px}.rule-note{margin-top:14px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
.unit-list{display:grid;grid-template-columns:1fr 1fr;gap:18px 26px}.unit-list h3{font-size:12px;color:var(--blue);margin-bottom:6px}.unit-list p{font-size:12px}@media(max-width:600px){.unit-list{grid-template-columns:1fr;gap:13px}.unit-list p{font-size:11px}}