:root{--ink:#153a36;--muted:#62716f;--paper:#f6f8f1;--card:#fff;--line:#d9e2d8;--lime:#c9ec66;--lime-dark:#9dcc27;--mint:#d9f0e5;--coral:#ff806e;--shadow:0 18px 50px rgba(21,58,54,.10);font-family:Inter,ui-sans-serif,system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:var(--paper);font-size:16px}*{box-sizing:border-box}body{margin:0;min-height:100vh;background:radial-gradient(circle at 12% 10%,#e6f3d1 0,transparent 30%),radial-gradient(circle at 91% 90%,#d9eee7 0,transparent 34%),var(--paper)}button,input{font:inherit}.hidden{display:none!important}.shell{width:min(1120px,100%);margin:auto;min-height:100vh;padding:0 28px}.topbar{height:76px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;gap:11px;align-items:center;color:var(--ink);text-decoration:none;font-weight:750}.brand-mark{width:36px;height:36px;display:grid;place-items:center;border-radius:11px;background:var(--ink);color:var(--lime);font-size:20px}.icon-button{border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:50%;width:40px;height:40px;font-size:25px;cursor:pointer}.screen{min-height:calc(100vh - 76px)}.start-screen{display:grid;grid-template-columns:1.25fr .75fr;gap:64px;align-items:center;padding:36px 2vw 88px}.eyebrow{text-transform:uppercase;letter-spacing:.14em;font-size:.78rem;font-weight:800;color:#52766e;margin:0 0 18px}h1{font-size:clamp(2.9rem,6vw,5.6rem);line-height:.91;letter-spacing:-.065em;margin:0;max-width:780px}h1 span{color:#52827a}.subtitle{font-size:1.18rem;line-height:1.6;color:var(--muted);max-width:610px;margin:30px 0 0}.start-card,.task-card,.result-content{background:rgba(255,255,255,.94);border:1px solid rgba(21,58,54,.08);box-shadow:var(--shadow);border-radius:28px}.start-card{padding:28px;text-align:center;position:relative}.flask{width:126px;height:126px;border-radius:50%;background:var(--mint);display:grid;place-items:center;margin:-72px auto 22px;font-family:Georgia,serif;font-size:1.6rem;font-weight:700;position:relative}.flask i{position:absolute;inset:auto 26px 20px;height:16px;border-radius:50%;background:var(--lime);opacity:.75}fieldset{border:0;padding:0;margin:0 0 22px}legend{text-align:left;font-weight:750;margin-bottom:10px}.segmented{display:grid;grid-template-columns:repeat(3,1fr);padding:4px;background:#eef2eb;border-radius:14px}.segmented input{position:absolute;opacity:0}.segmented span{display:block;padding:11px;border-radius:10px;font-weight:750;cursor:pointer}.segmented input:checked+span{background:#fff;box-shadow:0 2px 10px rgba(21,58,54,.12)}button{border:0}.primary-button,.secondary-button{min-height:48px;padding:0 20px;border-radius:14px;font-weight:800;cursor:pointer;transition:.18s ease}.primary-button{background:var(--ink);color:#fff;box-shadow:0 7px 18px rgba(21,58,54,.18)}.primary-button:hover{transform:translateY(-1px);background:#0d2d2a}.primary-button:disabled{opacity:.38;cursor:not-allowed;transform:none}.start-card .primary-button{width:100%;display:flex;justify-content:space-between;align-items:center}.secondary-button{background:#edf3ed;color:var(--ink)}.text-button{background:transparent;color:#4d716a;font-weight:750;margin:15px 0;cursor:pointer}.start-meta{border-top:1px solid var(--line);padding-top:18px;display:flex;justify-content:space-around;gap:8px;color:var(--muted);font-size:.75rem}.start-meta span:before{content:'✓';color:#6f9e1f;margin-right:4px}.trainer-screen{padding:22px 0 70px}.progress-head{max-width:840px;margin:0 auto 18px}.progress-head>div:first-child{display:flex;justify-content:space-between;align-items:end;font-size:.88rem;color:var(--muted)}.progress-head strong{font-size:.88rem;color:var(--ink)}.progress-track{height:6px;background:#dde5dd;border-radius:10px;margin-top:12px;overflow:hidden}.progress-track i{display:block;height:100%;background:var(--lime-dark);width:0;transition:width .3s}.task-card{max-width:840px;margin:auto;padding:30px 34px}.task-tags{display:flex;gap:8px;margin-bottom:20px}.task-tags span{background:#eef3ed;border-radius:999px;padding:6px 10px;font-size:.75rem;font-weight:750;color:#55716c}.task-tags span:last-child{color:#7a9b2a}.formula{font-family:Georgia,"Times New Roman",serif;font-size:clamp(2.2rem,6vw,4rem);letter-spacing:.02em;margin:8px 0 18px}.prompt{font-size:1.22rem;font-weight:720;line-height:1.45;margin:0 0 22px}.statement{background:#eef5ef;border-left:4px solid var(--lime-dark);padding:18px;border-radius:0 14px 14px 0;margin-bottom:22px;font-size:1.13rem;font-weight:700;line-height:1.45}.options{display:grid;grid-template-columns:1fr 1fr;gap:10px}.option{display:flex;align-items:center;gap:12px;text-align:left;background:#fff;border:1.5px solid var(--line);min-height:54px;padding:11px 14px;border-radius:14px;color:var(--ink);cursor:pointer;line-height:1.35}.option:hover{border-color:#9cb8af}.option.selected{border-color:var(--ink);background:#edf4ef}.option.correct{border-color:#73a529;background:#f1f8dd}.option.wrong{border-color:var(--coral);background:#fff1ee}.option-key{flex:0 0 28px;width:28px;height:28px;border-radius:8px;background:#edf1eb;display:grid;place-items:center;font-size:.8rem;font-weight:800}.match-grid{display:grid;grid-template-columns:1fr 1.35fr;gap:10px;align-items:center}.match-formula{font-family:Georgia,serif;font-size:1.3rem;font-weight:700}.match-grid select{width:100%;padding:12px;border:1.5px solid var(--line);border-radius:12px;background:#fff;color:var(--ink)}.path{display:flex;flex-wrap:wrap;gap:8px;align-items:center}.path .option{min-height:44px}.oge-list{display:grid;gap:7px;margin-bottom:20px}.oge-row{padding:9px 12px;border-radius:10px;background:#f2f5f0;font-family:Georgia,serif;font-size:1.06rem}.oge-inputs{display:flex;align-items:center;gap:8px}.oge-inputs input{width:52px;height:52px;text-align:center;border:2px solid var(--ink);border-radius:10px;font-size:1.3rem;font-weight:800}.feedback,.help-box{margin-top:18px;padding:13px 16px;border-radius:12px;line-height:1.45}.feedback.error{background:#fff0ed;color:#9f3528}.feedback.success{background:#edf7dd;color:#406b12}.help-box{background:#f3f5ed;border:1px solid var(--line)}.solution-answer{font-weight:850;margin-bottom:6px}.actions{display:flex;gap:10px;justify-content:flex-end;margin-top:22px}.result-screen{display:grid;grid-template-columns:.75fr 1.25fr;align-items:center;gap:44px;padding:36px 7vw 80px}.result-hero{display:grid;place-items:center}.score-ring{width:240px;height:240px;border-radius:50%;display:flex;flex-direction:column;justify-content:center;align-items:center;text-align:center;background:conic-gradient(var(--lime-dark) var(--score,0%),#dde7db 0);position:relative}.score-ring:before{content:'';position:absolute;inset:18px;background:var(--paper);border-radius:50%}.score-ring strong,.score-ring span{position:relative}.score-ring strong{font-size:3rem}.score-ring span{font-size:.82rem;color:var(--muted);max-width:100px}.result-content{padding:34px}.result-content h2{font-size:2.1rem;margin:0 0 8px}.result-content>p:not(.eyebrow){color:var(--muted)}.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:9px;margin:24px 0}.stat{padding:14px;border-radius:14px;background:#f1f5ef}.stat strong{display:block;font-size:1.5rem}.stat span{font-size:.78rem;color:var(--muted)}.result-actions{display:flex;gap:10px}.result-actions button{flex:1}
@media(max-width:760px){.shell{padding:0 16px}.topbar{height:64px}.screen{min-height:calc(100vh - 64px)}.start-screen{grid-template-columns:1fr;gap:85px;padding:38px 0 52px}.start-copy{text-align:center}.subtitle{font-size:1rem;margin:20px auto 0}.start-card{max-width:430px;width:100%;margin:auto}.trainer-screen{padding-top:14px}.task-card{padding:22px 18px;border-radius:20px}.options{grid-template-columns:1fr}.actions{flex-wrap:wrap}.actions button{flex:1;white-space:nowrap}.result-screen{grid-template-columns:1fr;gap:24px;padding:24px 0 50px}.score-ring{width:185px;height:185px}.result-content{padding:24px}.result-actions{flex-direction:column}.start-meta{flex-wrap:wrap}}
@media(max-width:420px){h1{font-size:2.55rem}.task-card{padding:18px 14px}.match-grid{grid-template-columns:1fr}.stats{grid-template-columns:1fr 1fr}.oge-inputs input{width:48px}.actions .secondary-button{flex-basis:100%}}
.topbar-left{display:flex;align-items:center;gap:22px}.home-link{color:var(--muted);text-decoration:none;font-weight:750}.home-link:hover{text-decoration:underline}
@media(max-width:760px){.topbar-left{gap:12px}.brand>span:last-child{display:none}}
.manual-answer{width:100%;min-height:54px;padding:12px 14px;border:1.5px solid var(--line);border-radius:14px;background:#fff;color:var(--ink);font-size:1rem}.manual-answer:focus{outline:3px solid rgba(157,204,39,.22);border-color:var(--lime-dark)}