:root{--bg:#f6f3ed;--surface:#fffdf8;--surface-strong:#fff;--text:#22252a;--muted:#687076;--line:#ded8cc;--primary:#176b68;--primary-strong:#0d514f;--primary-soft:#dff0ed;--accent:#d95030;--accent-soft:#ffe5dc;--ok:#2d7c45;--shadow:0 18px 45px #3c301e1f;--radius:8px;color:var(--text);background:var(--bg);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*{box-sizing:border-box}body{min-width:320px;min-height:100svh;margin:0}button,input{font:inherit}button{background:var(--primary);color:#fff;cursor:pointer;border:0;border-radius:8px;min-height:44px;font-weight:750;transition:transform .16s,background .16s,box-shadow .16s}button:hover{background:var(--primary-strong);transform:translateY(-1px)}button:focus-visible,input:focus-visible{outline-offset:2px;outline:3px solid #176b6847}h1,h2,p{margin:0}h1{max-width:780px;font-size:clamp(2.25rem,6vw,5rem);line-height:.98}h2{font-size:1.35rem;line-height:1.15}#app{min-height:100svh}.app-shell{width:min(1180px,100%);min-height:100svh;margin:0 auto;padding:20px}.topbar{z-index:10;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);background:#fffdf8e6;border:1px solid #ded8ccd9;border-radius:8px;grid-template-columns:repeat(4,1fr);gap:8px;margin-bottom:18px;padding:8px;display:grid;position:sticky;top:12px}.topbar button{min-width:0;color:var(--muted);text-overflow:ellipsis;white-space:nowrap;background:0 0;padding:0 10px;overflow:hidden}.topbar button.active{color:#fff;background:var(--primary)}.hero-panel,.panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow)}.hero-panel{grid-template-columns:minmax(0,1fr) 220px;align-items:end;gap:24px;padding:clamp(24px,5vw,56px);display:grid}.lead{max-width:650px;color:var(--muted);margin-top:16px;font-size:1.12rem}.eyebrow{color:var(--primary);letter-spacing:0;text-transform:uppercase;margin-bottom:10px;font-size:.78rem;font-weight:850}.danger{color:var(--accent)}.status-card{background:var(--primary-soft);border-radius:8px;gap:6px;min-height:172px;padding:22px;display:grid}.status-card span,.status-card small{color:var(--muted)}.status-card strong{font-size:3.2rem;line-height:1}.level-grid,.settings-grid,.stats-grid,.training-layout{gap:14px;margin-top:14px;display:grid}.level-grid{grid-template-columns:repeat(5,minmax(0,1fr))}.level-card,.panel{padding:18px}.level-card{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface-strong);align-content:space-between;gap:16px;min-height:246px;display:grid}.level-card.complete{background:#f5fff7;border-color:#2d7c456b}.level-card p,.metric-row span,.stat span{color:var(--muted)}.level-number{color:var(--accent);margin-bottom:8px;font-size:.82rem;font-weight:850;display:block}.card-meta,.metric-row{justify-content:space-between;align-items:center;gap:12px;display:flex}.card-meta{color:var(--muted);font-size:.94rem}.training-layout{grid-template-columns:300px minmax(0,1fr);align-items:stretch}.compact{align-content:start;gap:18px;display:grid}.trainer{text-align:center;align-content:center;place-items:center;gap:22px;min-height:min(620px,100svh - 130px);display:grid}.problem{font-variant-numeric:tabular-nums}.timer{background:#ece5d7;border-radius:99px;width:min(480px,100%);height:14px;overflow:hidden}.timer span{border-radius:inherit;background:linear-gradient(90deg, var(--ok), var(--accent));height:100%;transition:width .12s linear;display:block}.answer-form{grid-template-columns:minmax(0,1fr) 150px;gap:10px;width:min(520px,100%);display:grid}.answer-form input{border:2px solid var(--line);width:100%;min-height:72px;color:var(--text);text-align:center;background:#fff;border-radius:8px;font-size:2rem;font-weight:850}.feedback{background:var(--primary-soft);min-height:32px;color:var(--primary-strong);border-radius:8px;padding:8px 12px;font-weight:750}.actions{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.secondary{color:var(--text);background:#e6e0d4}.secondary:hover{background:#d7d0c3}.settings-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.range{width:100%;accent-color:var(--primary);margin-top:22px}.row-toggles{grid-template-columns:repeat(5,1fr);gap:8px;margin-top:18px;display:grid}.row-toggles button,.switch-list button{color:var(--text);background:#e6e0d4}.row-toggles button.active,.switch-list button.active{background:var(--primary);color:#fff}.switch-list{gap:10px;margin-top:18px;display:grid}.danger-button{background:var(--accent)!important;color:#fff!important}.stats-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.stat{gap:10px;display:grid}.stat strong{font-size:2.3rem;line-height:1}.weak-list{flex-wrap:wrap;gap:8px;margin-top:18px;display:flex}.weak-list span{background:var(--primary-soft);color:var(--primary-strong);border-radius:8px;padding:8px 12px;font-weight:800}@media (width<=940px){.hero-panel,.training-layout,.settings-grid{grid-template-columns:1fr}.level-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.status-card{min-height:130px}}@media (width<=640px){.app-shell{padding:12px}.topbar{grid-template-columns:repeat(2,1fr);top:6px}.hero-panel,.panel,.level-card{padding:16px}.level-grid,.stats-grid{grid-template-columns:1fr}.level-card{min-height:210px}.trainer{min-height:calc(100svh - 190px)}.answer-form{grid-template-columns:1fr}.answer-form input{min-height:68px}.row-toggles{grid-template-columns:repeat(2,1fr)}}