:root{--bg:#0d1117;--bg-card:#161b26;--bg-input:#1c2333;--border:#2a3245;--text:#e6edf3;--text-dim:#94a3b8;--neon-green:#39ff88;--neon-cyan:#35e6ff;--neon-pink:#ff3ea5;--neon-purple:#a06bff;--neon-yellow:#ffd93d;--danger:#ff4757;--success:#39ff88;--radius:14px;--font:"Segoe UI", system-ui, -apple-system, Roboto, sans-serif}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font);background:var(--bg);color:var(--text);background-image:radial-gradient(80% 50% at 50% -10%,#39ff881f,#0000),radial-gradient(60% 40% at 90% 110%,#a06bff1a,#0000);min-height:100vh}a{color:var(--neon-cyan);text-decoration:none}button{font-family:inherit}.container{max-width:900px;margin:0 auto;padding:16px}.nav{border-bottom:1px solid var(--border);z-index:50;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#0d1117e6;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;padding:14px 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#00000040}.grammar-lang-pill{color:#94a3b8;cursor:pointer;background:0 0;border:none;border-radius:9px;padding:6px 14px;font-size:.82rem;font-weight:700;transition:all .15s}.grammar-lang-pill:hover{color:#fff}.grammar-lang-pill.active{color:var(--neon-cyan);background:#35e6ff2e;border:1px solid #35e6ff66;box-shadow:0 0 10px #35e6ff33}.btn-speak-inline{width:28px;height:28px;color:var(--neon-cyan);cursor:pointer;vertical-align:middle;background:#35e6ff1a;border:1px solid #35e6ff4d;border-radius:50%;justify-content:center;align-items:center;margin-left:6px;font-size:.85rem;transition:all .15s;display:inline-flex}.btn-speak-inline:hover{background:#35e6ff40;transform:scale(1.1)}.btn-speak-inline.playing{background:var(--neon-cyan);color:#000;animation:1s infinite pulse}.grammar-quiz-container{border-top:2px dashed #ffffff1a;margin-top:30px;padding-top:24px}.grammar-quiz-card{border-radius:var(--radius);background:#121622b3;border:1px solid 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td{border-bottom:none}.gram-table tr:hover td{background:#35e6ff0a}@media (width<=800px){.grammar-layout{grid-template-columns:1fr}.grammar-side__inner{max-height:250px;position:static}}.match-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;min-height:200px;margin-top:16px;display:grid}.match-tile{background:var(--bg-card);border:1px solid var(--border);color:var(--text);cursor:pointer;text-align:center;border-radius:12px;min-height:76px;padding:18px 12px;font-size:1rem;font-weight:700;transition:all .15s}.match-tile:hover:not(.matched){border-color:var(--neon-cyan);transform:translateY(-2px);box-shadow:0 0 12px #35e6ff4d}.match-tile.selected{border-color:var(--neon-green);background:#39ff881a;box-shadow:0 0 16px #39ff8866}.match-tile.wrong{border-color:var(--danger);background:#ff47571f;animation:.4s tileShake}.match-tile.matched{color:var(--text-dim);opacity:.35;pointer-events:none;background:#39ff880d;border-color:#39ff8859;transition:all 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