:root{color-scheme:light;--paper: #F4F6F8;--surface: #FFFFFF;--surface-2: #EDF0F4;--surface-3: #E3E8EE;--ink: #151A23;--ink-2: #3D4756;--ink-3: #68737F;--ink-faint: #96A0AB;--line: #DCE2E9;--line-strong: #C3CCD6;--accent: #8C2D3E;--accent-ink: #FFFFFF;--accent-hover: #74232F;--accent-soft: #F7E9EB;--accent-line: #E3C3C8;--petrol: #1F3A5F;--petrol-soft: #E7ECF3;--ok: #1F6B45;--ok-soft: #E4F1E9;--warn: #8A6A1F;--warn-soft: #F7EFDA;--bad: #9B3025;--bad-soft: #F8E6E3;--unknown: #68737F;--unknown-soft: #EAEEF2;--display: "Literata", Georgia, "Times New Roman", serif;--ui: "Source Sans 3", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;--mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;--shadow-1: 0 1px 2px rgba(21, 26, 35, .05);--shadow-2: 0 1px 2px rgba(21, 26, 35, .06), 0 10px 28px -18px rgba(21, 26, 35, .32);--shadow-pop: 0 2px 4px rgba(21, 26, 35, .08), 0 18px 40px -20px rgba(21, 26, 35, .4);--r-sm: 4px;--r: 6px;--r-lg: 10px;--rail: 232px;--topbar: 56px}@media (prefers-color-scheme: dark){:root:not([data-theme=light]){color-scheme:dark;--paper: #0F1319;--surface: #161B23;--surface-2: #1E252F;--surface-3: #28313D;--ink: #E7EBF0;--ink-2: #B3BCC7;--ink-3: #8691A0;--ink-faint: #67727F;--line: #28313D;--line-strong: #39445260;--accent: #D4697C;--accent-ink: #1A0D10;--accent-hover: #E07E90;--accent-soft: #2E181C;--accent-line: #4A2830;--petrol: #8FB0D8;--petrol-soft: #1B2433;--ok: #6FBF91;--ok-soft: #16271E;--warn: #CFAB5A;--warn-soft: #272013;--bad: #E0847A;--bad-soft: #2C1917;--unknown: #8691A0;--unknown-soft: #1E252F;--shadow-1: 0 1px 2px rgba(0,0,0,.5);--shadow-2: 0 1px 2px rgba(0,0,0,.5), 0 10px 28px -18px rgba(0,0,0,.9);--shadow-pop: 0 2px 4px rgba(0,0,0,.6), 0 18px 40px -20px rgba(0,0,0,1)}}:root[data-theme=dark]{color-scheme:dark;--paper: #0F1319;--surface: #161B23;--surface-2: #1E252F;--surface-3: #28313D;--ink: #E7EBF0;--ink-2: #B3BCC7;--ink-3: #8691A0;--ink-faint: #67727F;--line: #28313D;--line-strong: #394452;--accent: #D4697C;--accent-ink: #1A0D10;--accent-hover: #E07E90;--accent-soft: #2E181C;--accent-line: #4A2830;--petrol: #8FB0D8;--petrol-soft: #1B2433;--ok: #6FBF91;--ok-soft: #16271E;--warn: #CFAB5A;--warn-soft: #272013;--bad: #E0847A;--bad-soft: #2C1917;--unknown: #8691A0;--unknown-soft: #1E252F;--shadow-1: 0 1px 2px rgba(0,0,0,.5);--shadow-2: 0 1px 2px rgba(0,0,0,.5), 0 10px 28px -18px rgba(0,0,0,.9);--shadow-pop: 0 2px 4px rgba(0,0,0,.6), 0 18px 40px -20px rgba(0,0,0,1)}*,*:before,*:after{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--paper);color:var(--ink);font:400 15px/1.55 var(--ui);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}img{max-width:100%;display:block}button,input,select,textarea{font:inherit;color:inherit}[hidden]{display:none!important}:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:var(--r-sm)}@media (prefers-reduced-motion: 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.lock{font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-3);margin-left:6px}.locked-field{padding:7px 10px;border:1px dashed var(--line-strong);border-radius:var(--r);background:var(--surface-2);color:var(--ink-3);font-size:13px}.mailframe{border:1px solid var(--line);border-radius:var(--r);background:var(--surface-2);overflow:hidden;margin-top:4px;max-height:460px;overflow-y:auto}.mailframe>div{margin:0!important}.sp{max-width:640px;margin:0 auto;padding:0 16px 64px}.sp-top{display:flex;align-items:flex-end;gap:12px;padding:22px 0 10px}.sp-top .spacer{flex:1}.sp-school{font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3)}.sp-top h1{font-size:26px;margin:2px 0 0}.sp-body{display:grid;gap:18px}.sp-h1{font-size:22px;margin:10px 0 0}.sp-h2{font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-3);margin:6px 0 -6px}.sp-hero{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding:22px;border-radius:16px;background:var(--accent-soft);border:1px solid var(--accent-line)}.sp-hero.done{background:var(--surface);border-color:var(--line)}.sp-hero-n{font-size:46px;font-weight:600;line-height:1;color:var(--accent);min-width:62px}.sp-hero.done .sp-hero-n{color:var(--ok)}.sp-hero-t{flex:1 1 220px;display:grid;gap:3px}.sp-hero-t b{font-size:17px}.sp-hero-t span{color:var(--ink-3);font-size:14px;line-height:1.5}.btn-lg{padding:11px 22px;font-size:15px}.sp-stats{display:grid;grid-template-columns:1fr 1fr;gap:12px}.sp-stat{padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--surface)}.sp-stat-n{font-size:28px;font-weight:600;line-height:1.1}.sp-stat-l{font-size:13px}.sp-stat-h{font-size:12px;color:var(--ink-3);margin-top:2px}.sp-cards{display:grid;gap:10px}.sp-card{text-align:left;padding:15px 16px;border:1px solid var(--line);border-radius:12px;background:var(--surface);cursor:pointer;width:100%}.sp-card:hover{border-color:var(--accent)}.sp-card-t{font-weight:600}.sp-card-s{font-size:13px;color:var(--ink-3);margin-top:2px}.sp-progress{height:5px;border-radius:99px;background:var(--line);overflow:hidden}.sp-progress i{display:block;height:100%;background:var(--accent);transition:width .25s ease}.sp-count{font-size:12px;color:var(--ink-3);margin:-10px 0 0}.sp-q{padding:26px 20px;border:1px solid var(--line);border-radius:16px;background:var(--surface);display:grid;gap:16px;justify-items:center;text-align:center}.sp-prompt{font-size:32px;font-weight:600;line-height:1.25}.sp-notes{font-size:13px;color:var(--ink-3);margin-top:-10px}.sp-options{display:grid;gap:9px;width:100%}.sp-opt{padding:14px 16px;border:1px solid var(--line);border-radius:11px;background:var(--paper);font-size:15px;cursor:pointer;width:100%}.sp-opt:hover:not(:disabled){border-color:var(--accent);background:var(--accent-soft)}.sp-opt:disabled{opacity:.55;cursor:default}.sp-opt.right:disabled{opacity:1;border-color:var(--ok);background:var(--ok-soft);font-weight:600}.sp-opt.chosen:disabled{opacity:1;border-color:var(--bad);background:var(--bad-soft)}.sp-q form{display:grid;gap:12px;width:100%;justify-items:center}.sp-input{width:100%;text-align:center;font-size:19px;padding:13px 14px;border:1px solid var(--line-strong);border-radius:11px;background:var(--paper)}.sp-input:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:transparent}.sp-verdict{display:grid;gap:7px;justify-items:center;width:100%}.sp-verdict b{font-size:17px}.sp-verdict.correct b{color:var(--ok)}.sp-verdict.close b{color:var(--warn)}.sp-verdict.wrong b{color:var(--bad)}.sp-why{font-size:13px;color:var(--ink-3)}.sp-answer{font-size:16px;padding:9px 14px;border-radius:9px;background:var(--paper)}.sp-join{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:16px;border-radius:12px;border:1px solid var(--accent-line);background:var(--accent-soft)}.sp-join>div{flex:1 1 200px;min-width:0}.sp-join-url{font-size:13px;color:var(--ink-3);overflow-wrap:anywhere}.sp-next{margin:0;font-size:14px}.sp-course-links{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.sp-teacher{display:flex;gap:12px;align-items:center;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--surface)}.sp-teacher-av{width:42px;height:42px;flex:0 0 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