:root{--ink:#183048;--muted:#53677a;--bg:#f6f8fb;--surface:#fff;--navy:#173b56;--blue:#246e94;--blue-light:#eaf4fb;--accent:#c4e9df;--success:#17664d;--successbg:#e9f7f0;--warning:#80551d;--warningbg:#fff7e6;--border:#dce5eb;--focus:#a56b18;--shadow:0 10px 35px rgba(23,59,86,.065);--scale:1;font-synthesis:none}
*{box-sizing:border-box}html{scroll-behavior:smooth;font-size:calc(16px * var(--scale))}body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;line-height:1.58}button,input,select{font:inherit}button{cursor:pointer}a{color:var(--blue);text-underline-offset:3px}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--focus);outline-offset:3px}.container{max-width:1120px;margin:0 auto;padding-left:22px;padding-right:22px}.topbar{background:var(--navy);position:sticky;top:0;z-index:10;box-shadow:0 3px 12px rgba(0,0,0,.1)}.top-inner{min-height:78px;display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;padding-block:12px}.brand{display:flex;gap:12px;align-items:center;color:white;text-decoration:none}.brand-symbol{width:46px;height:46px;border:2px solid #b7dce6;border-radius:14px;display:grid;place-items:center;font-size:28px}.brand strong,.brand small{display:block}.brand strong{font-size:1.07rem;letter-spacing:.01em}.brand small{font-size:.75rem;color:#cce4ee;line-height:1.35}.nav{display:flex;gap:5px;flex-wrap:wrap}.nav-button{color:#e7f2f7;background:transparent;border:1px solid transparent;border-radius:10px;padding:9px 13px;font-size:.92rem}.nav-button:hover,.nav-button.active{background:#345b75;color:#fff;border-color:#698aa0}main{min-height:65vh;padding-top:30px;padding-bottom:25px}.hero{background:linear-gradient(130deg,#e8f3f8,#eff6f2);padding:35px 38px;border-radius:22px;border:1px solid #d9e5e9;display:grid;grid-template-columns:minmax(0,1.4fr) minmax(200px,.6fr);align-items:center;gap:20px}.eyebrow{text-transform:uppercase;letter-spacing:.1em;font-size:.75rem;color:var(--blue);font-weight:800}.hero h1{font-size:clamp(1.75rem,3.3vw,2.7rem);line-height:1.18;max-width:670px;margin:12px 0 16px}.hero p{max-width:650px;color:var(--muted);margin:0 0 20px}.hero-art{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px}.hero-art .large-sum{font-size:clamp(2.8rem,6vw,4.5rem);font-weight:800;color:var(--navy);line-height:1}.hero-art .bars{display:flex;gap:10px;align-items:flex-end;height:125px}.hero-art .bars span{display:block;background:#6094ad;border-radius:10px 10px 3px 3px;width:34px}.hero-art .bars span:nth-child(1){height:38%}.hero-art .bars span:nth-child(2){height:62%;background:#93beb4}.hero-art .bars span:nth-child(3){height:86%}.hero-art .bars span:nth-child(4){height:100%;background:#c1d8a4}.hero-art small{color:var(--muted)}h1,h2,h3{line-height:1.28;letter-spacing:-.02em}h2{font-size:clamp(1.35rem,2.5vw,1.8rem)}h3{font-size:1.14rem}.section-head{display:flex;align-items:end;justify-content:space-between;gap:10px;margin:27px 0 14px;flex-wrap:wrap}.section-head h2,.section-head p{margin:0}.section-head p{color:var(--muted);font-size:.92rem}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}.panel,.lesson-card,.day-card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:22px;box-shadow:var(--shadow)}.panel h3,.lesson-card h3{margin:0 0 8px}.panel p,.lesson-card p{color:var(--muted)}.lesson-card{display:flex;flex-direction:column;gap:7px}.lesson-card p{margin:3px 0 14px;flex:1}.lesson-card .tag{align-self:flex-start}.muted{color:var(--muted)}.small{font-size:.89rem}.tiny{font-size:.78rem}.tag{background:var(--blue-light);color:#205b7e;border-radius:7px;padding:3px 9px;font-weight:700;font-size:.78rem}.tag.green{background:var(--successbg);color:var(--success)}.tag.gold{background:var(--warningbg);color:var(--warning)}.btn{display:inline-flex;gap:8px;align-items:center;justify-content:center;padding:11px 18px;border:1px solid var(--navy);border-radius:11px;font-weight:700;text-decoration:none;line-height:1.3;min-height:44px;max-width:100%;text-align:center;background:var(--navy);color:white}.btn:hover{filter:brightness(1.1)}.btn.secondary{background:var(--surface);color:var(--navy);border-color:#abc2d0}.btn.ghost{background:transparent;color:var(--navy);border-color:transparent}.btn.small-btn{padding:7px 12px;min-height:38px;font-size:.86rem}.btn:disabled{opacity:.5;cursor:not-allowed}.actions{display:flex;gap:9px;flex-wrap:wrap}.stat{font-size:1.65rem;font-weight:800;color:var(--navy);line-height:1.1}.stat-label{font-size:.86rem;color:var(--muted);margin-top:7px}.progress{height:13px;border-radius:12px;background:#e2eaf0;overflow:hidden;margin-top:11px}.progress>span{display:block;height:100%;width:0;background:#257c6d;transition:width .15s}.day-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.day-card{padding:15px 17px;display:grid;grid-template-columns:55px 1fr auto;gap:12px;align-items:center}.day-count{font-size:1.15rem;font-weight:800;color:var(--navy);background:#edf3f7;border-radius:12px;padding:12px 8px;text-align:center}.day-card h3{margin:0;font-size:1rem}.day-card p{margin:2px 0 0;font-size:.84rem;color:var(--muted)}.day-card.done{border-color:#badbcf}.day-card.done .day-count{background:var(--successbg);color:var(--success)}.day-card.current{border:2px solid #4580a6}.lesson-layout{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(245px,.7fr);gap:20px;align-items:start}.lesson-main{min-width:0}.stage{min-height:210px;padding:26px 24px;border:1px solid #dce7ef;border-radius:17px;background:#f2f8fb;margin:12px 0 15px}.stage .stage-title{font-size:1.38rem;font-weight:800;margin-bottom:10px}.formula{display:inline-block;font-size:clamp(1.2rem,3vw,1.75rem);padding:12px 18px;background:white;border:1px solid #d5e5ef;border-radius:10px;font-weight:800;color:#1a5072;margin:13px 0;line-height:1.3}.graphic{margin-top:10px;border:1px solid var(--border);border-radius:16px;background:#fff;padding:12px;min-height:145px;display:grid;place-items:center}.graphic svg{width:100%;height:auto;max-height:185px}.stage-counter{display:flex;gap:7px;align-items:center}.dot{width:12px;height:12px;background:#becdd7;border-radius:50%}.dot.active{background:var(--blue)}.lesson-steps{margin:0;padding-left:22px}.lesson-steps li{margin-bottom:9px}.lesson-side{position:sticky;top:104px}.lesson-side .panel{margin-bottom:13px}.lesson-side h3{margin-bottom:10px}.notice{padding:14px 18px;border-left:4px solid #6895ab;background:#eef6f9;border-radius:6px 11px 11px 6px;margin:14px 0}.notice.success{border-color:#3a9378;background:var(--successbg)}.notice.warn{border-color:#c89952;background:var(--warningbg)}.question-area{max-width:820px;margin:0 auto}.question-card{background:white;border:1px solid var(--border);border-radius:20px;padding:25px;box-shadow:var(--shadow)}.question-card h2{font-size:1.33rem}.options{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;margin:19px 0}.option{padding:15px 15px;min-height:58px;background:#f8fafc;color:var(--ink);border:2px solid var(--border);border-radius:12px;text-align:left;display:flex;gap:11px;align-items:center}.option:hover{border-color:#668da7}.option.selected{border-color:#266c91;background:#eaf4fa}.option .letter{font-weight:800;background:#e5eff4;padding:4px 10px;border-radius:8px}.option:disabled{cursor:default}.option.iscorrect{border-color:#268266;background:var(--successbg)}.option.iswrong{border-color:#bb8850;background:var(--warningbg)}.qa-progress{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.pill{background:#eaf3f7;border-radius:99px;padding:7px 12px;font-size:.86rem;font-weight:700;color:#245a79}.result-item{border-bottom:1px solid var(--border);padding:12px 0}.result-item:last-child{border:0}.settings-row{display:flex;justify-content:space-between;align-items:center;gap:18px;border-bottom:1px solid var(--border);padding:16px 0}.settings-row:last-child{border:0}.settings-row input[type=date],.settings-row input[type=text],.settings-row input[type=number],.settings-row select{padding:11px;border:1px solid #a8bbc7;border-radius:9px;background:var(--surface);color:var(--ink);max-width:100%}.badge-check{color:var(--success);font-weight:800;font-size:.9rem}.graphic-caption{color:var(--muted);font-size:.83rem;margin-top:5px;text-align:center}.breadcrumbs{font-size:.87rem;color:var(--muted);margin:0 0 16px}.breadcrumbs a{color:var(--blue)}.footnote{font-size:.84rem}.footer{padding-bottom:30px;color:var(--muted);border-top:1px solid var(--border);padding-top:20px}.footer p{margin:6px 0}.skip{position:absolute;top:-120px;left:10px;background:#fff;color:#000;padding:10px;z-index:100}.skip:focus{top:10px}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.switch{width:20px;height:20px;accent-color:#2c6f91}.settings-input{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.line{border:0;border-top:1px solid var(--border);margin:21px 0}.module-meter{font-size:.83rem;color:var(--muted)}.module-mini{height:7px;background:#e5ebef;border-radius:10px;margin:10px 0 2px}.module-mini span{display:block;height:100%;background:#23826b;border-radius:10px}.empty{padding:26px;text-align:center;color:var(--muted)}body.high-contrast{--ink:#101010;--muted:#292929;--bg:#fff;--surface:#fff;--navy:#071f34;--blue:#004a80;--border:#777;--blue-light:#e5f0ff;--shadow:none}body.calm *{transition:none!important;animation:none!important;scroll-behavior:auto!important}body.calm .hero{background:#f0f5f7}.readable{max-width:68ch}.screen-only{display:none!important}
@media(max-width:920px){.hero{grid-template-columns:1fr}.hero-art{display:none}.lesson-layout{grid-template-columns:1fr}.lesson-side{position:static}.grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}.day-grid{grid-template-columns:1fr}}
@media(max-width:620px){.container{padding-left:15px;padding-right:15px}.top-inner{justify-content:center}.brand{width:100%;justify-content:center}.nav{justify-content:center}.nav-button{font-size:.82rem;padding:8px 10px}.hero{padding:25px 20px}.grid-3,.grid-2,.options{grid-template-columns:1fr}.day-card{grid-template-columns:45px 1fr;gap:7px}.day-card .day-buttons{grid-column:2}.settings-row{align-items:flex-start;flex-direction:column;gap:8px}.stage{padding:20px 15px}.question-card{padding:18px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}
@media print{.topbar,.actions,.lesson-side,.footer,.skip{display:none!important}body{background:#fff}main{max-width:100%;padding:0}.panel{break-inside:avoid;box-shadow:none}}