:root{--ink:#172034;--muted:#6f788b;--line:#e4e7ee;--soft:#f5f6fa;--purple:#6557e8;--purple-dark:#5143d5;--purple-soft:#eeecff;--green:#15966e;--green-soft:#eaf8f2;--red:#ca5961;--red-soft:#fff0f1;--shadow:0 16px 38px rgba(43,49,78,.08)}*{box-sizing:border-box}body,html{background:#f6f7fa}body{margin:0;color:var(--ink);font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}button,textarea{font:inherit}button{color:inherit}.app{min-height:100vh}.topbar{height:78px;justify-content:space-between;padding:0 clamp(22px,5vw,72px);background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);position:-webkit-sticky;position:sticky;top:0;z-index:20}.brand,.topbar{display:flex;align-items:center}.brand{gap:11px}.brandIcon{width:42px;height:42px;border-radius:13px;display:grid;place-items:center;color:white;background:linear-gradient(145deg,#7565f2,#5041ce);box-shadow:0 8px 20px 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infinite}.micButton:disabled{opacity:.5;cursor:not-allowed}@keyframes pulse{50%{box-shadow:0 0 0 9px rgba(213,83,98,.1)}}.feedback{margin-top:11px;border-radius:11px;padding:11px 13px;display:flex;align-items:flex-start;gap:9px;animation:bubbleIn .18s ease both}.feedback.correct{color:#167c5d;background:var(--green-soft)}.feedback.wrong{color:var(--red);background:var(--red-soft)}.feedback>svg{flex:none}.feedback strong{font-size:10px}.feedback p{margin:4px 0 0;color:#616a7a;font-size:9px;line-height:1.45}.checkButton{width:100%;min-height:45px;margin-top:13px;border:0;border-radius:11px;display:flex;align-items:center;justify-content:center;gap:8px;color:white;background:var(--purple);font-weight:800;font-size:11px;cursor:pointer;box-shadow:0 8px 18px rgba(101,87,232,.18)}.checkButton:hover{background:var(--purple-dark)}.checkButton:disabled{background:#c8cbd4;box-shadow:none;cursor:not-allowed}.completion{padding:35px 28px 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