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rgba(51,88,244,.45)}:root[data-theme=dark]{--bg:#0B1020;--surface:#141A30;--soft:#1B2340;--sunken:#10162B;--text:#EEF1FF;--muted:#A3ACCF;--faint:#727BA0;--line:#232C4D;--line-strong:#313B63;--accent:#7D9BFF;--accent-2:#A08BFF;--accent-ink:#0B1020;--accent-soft:#1E2A55;--gold:#FFD166;--grad:linear-gradient(135deg,#3B6BFF 0%,#4F55F7 55%,#6A45F6 100%);--fr:#FF7F98;--geo:#4FD1BE;--sp:#FFC45A;--t-blue:#1E2A55;--t-blue-i:#8FA9FF;--t-violet:#2A2257;--t-violet-i:#B3A1FF;--t-green:#173A2C;--t-green-i:#6FDC9C;--t-yellow:#3A3016;--t-yellow-i:#FFD166;--ok:#6FDC9C;--ok-soft:#173A2C;--ko:#FF8A93;--ko-soft:#3D1C24;--shadow:0 1px 2px rgba(0,0,0,.4),0 14px 34px -16px rgba(0,0,0,.7);--shadow-lg:0 2px 4px rgba(0,0,0,.4),0 24px 48px -20px rgba(0,0,0,.8)}body{background:var(--bg) radial-gradient(120% 60% at 50% -10%,color-mix(in srgb,var(--accent) 14%,transparent),transparent 70%) no-repeat;background-attachment:fixed;font-family:var(--font-ui)}h1{font:800 clamp(28px,7vw,40px)/1.1 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span{background:var(--ok-soft);color:var(--ok)}.lesson-end .actions{margin-top:6px}.btn.ghost-light{background:#ffffff29;color:#fff;border-color:#ffffff59}@media(max-width:850px){.letters{top:calc(56px + env(safe-area-inset-top))}.stepper li{font-size:12px;padding:8px 6px;gap:6px}}@media(max-width:420px){.stepper li{flex-direction:column;text-align:center}}
