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Roman,serif;font-size:1.05rem;font-style:italic;font-weight:800}.lta-sec-title{letter-spacing:-.01em;color:var(--ink);font-size:1.02rem;font-weight:800}.lta-sec-en{color:var(--ink-mute);text-transform:uppercase;letter-spacing:.05em;font-size:.7rem;font-weight:700}.lta-sec-hint{color:var(--ink-mute);margin-left:auto;font-size:.75rem;font-weight:500}.vocab-grid{grid-template-columns:repeat(auto-fill,minmax(155px,1fr));gap:8px;display:grid}.vocab-item{cursor:pointer;transition:all .15s var(--ease);text-align:left;background:#fffaf2;border:1.5px solid #f5d9a8;border-radius:8px;flex-direction:column;padding:10px 12px;font-family:inherit;display:flex;position:relative}.vocab-item:after{content:"🔊";opacity:0;font-size:.72rem;transition:opacity .15s;position:absolute;top:6px;right:8px}.vocab-item:hover{border-color:#f59e2c;transform:translateY(-1px);box-shadow:0 4px 12px #f59e2c26}.vocab-item:hover:after{opacity:.55}.vocab-item.is-playing{background:#ffe9c8;border-color:#f59e2c}.vocab-en{color:#5b3d1f;font-size:.98rem;font-weight:800;line-height:1.3}.vocab-vi{color:var(--ink-mute);margin-top:3px;font-size:.8rem;font-weight:500}.pattern-list{flex-direction:column;gap:10px;display:flex}.pattern-item{background:#f4f7ff;border-left:4px solid #6c8ff5;border-radius:6px;padding:14px 18px}.pattern-en{color:#1e3a8a;font-size:1rem;font-weight:700;line-height:1.5}.pattern-vi{color:#4b5e8a;margin-top:4px;font-size:.88rem;font-style:italic}.formula-list{flex-direction:column;gap:8px;display:flex}.formula-item{font-family:var(--font-sans,-apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif);color:#5e1a26;letter-spacing:.005em;-webkit-font-smoothing:antialiased;text-rendering:optimizelegibility;word-break:break-word;background:#fffafb;border:1.5px solid #f3d3da;border-left:4px solid #e0556e;border-radius:6px;padding:12px 16px;font-size:.94rem;font-weight:650;line-height:1.6}.alphabet-grid{grid-template-columns:repeat(auto-fill,minmax(115px,1fr));gap:10px;display:grid}.alphabet-card{cursor:pointer;transition:all .18s var(--ease);background:linear-gradient(160deg,#fff,#fff5f7);border:1.5px solid #f0c4ce;border-radius:10px;flex-direction:column;align-items:center;gap:4px;padding:14px 10px 12px;font-family:inherit;display:flex;position:relative}.alphabet-card:hover{border-color:#e0556e;transform:translateY(-3px);box-shadow:0 8px 22px #e0556e2e}.alphabet-card.is-playing{background:linear-gradient(160deg,#fde7eb,#fbcad2);border-color:#e0556e;transform:scale(.97)}.alphabet-letter{background:linear-gradient(135deg,#e0556e,#c5394d);-webkit-text-fill-color:transparent;background-clip:text;align-items:baseline;gap:4px;font-weight:800;line-height:1;display:flex}.alphabet-letter-upper{font-size:2rem}.alphabet-letter-lower{opacity:.7;font-size:1.4rem}.alphabet-ipa{color:#5e1a26;font-family:Consolas,Courier 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strong{color:#c46b1e;font-weight:800}.lta-detail-desc{color:var(--ink-mute);margin:8px 0 0;font-size:.92rem;line-height:1.55}.lta-card-tool{padding:14px 16px}.lta-card-info{flex-direction:column;flex:1;gap:3px;min-width:0;display:flex}.lta-card-sub{color:var(--ink-mute);text-overflow:ellipsis;white-space:nowrap;font-size:.76rem;font-weight:500;overflow:hidden}.tool-box{flex-direction:column;gap:14px;display:flex}.tool-label{color:var(--ink);font-size:.85rem;font-weight:700}.tool-row{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.tool-input{border:1.5px solid var(--line);min-width:160px;transition:border-color .15s var(--ease);background:#fff;border-radius:8px;flex:1;padding:10px 14px;font-family:inherit;font-size:1rem}.tool-input:focus{border-color:#e0556e;outline:none;box-shadow:0 0 0 3px #e0556e1f}.tool-input-sm{text-align:center;flex:0 0 90px;min-width:70px}.tool-sep{color:var(--ink-mute);font-size:1.4rem;font-weight:800}.tool-btn{cursor:pointer;transition:all .15s var(--ease);border:none;border-radius:8px;padding:10px 16px;font-family:inherit;font-size:.88rem;font-weight:700}.tool-btn-speak{color:#fff;background:linear-gradient(135deg,#e0556e,#c5394d);box-shadow:0 3px 10px #e0556e40}.tool-btn-speak:hover{transform:translateY(-1px);box-shadow:0 5px 14px #e0556e52}.tool-out{color:#5e1a26;word-break:break-word;background:linear-gradient(135deg,#fff8fa,#fef0f3);border:1.5px solid #f3d3da;border-radius:10px;min-height:56px;padding:16px 18px;font-size:1.1rem;font-weight:700;line-height:1.5}.tool-quick{flex-wrap:wrap;align-items:center;gap:6px;display:flex}.tool-quick-label{color:var(--ink-mute);margin-right:4px;font-size:.8rem;font-weight:600}.tool-chip{border:1.5px solid var(--line);color:var(--ink-soft);cursor:pointer;transition:all .12s var(--ease);background:#fff;border-radius:999px;padding:4px 10px;font-family:inherit;font-size:.78rem;font-weight:600}.tool-chip:hover{color:#c5394d;background:#fffafb;border-color:#e0556e}.tool-note{color:#1e3a8a;background:#f4f7ff;border-left:3px solid #6c8ff5;border-radius:6px;padding:10px 14px;font-size:.85rem;line-height:1.55}.tool-note strong{color:#4f7df0;font-weight:800}.tool-note em{color:#1e3a8a;font-style:italic;font-weight:700}.tool-table-wrap{border:1.5px solid var(--line);border-radius:8px;max-height:540px;overflow-y:auto}.tool-table{border-collapse:collapse;width:100%;font-size:.9rem}.tool-table thead{z-index:1;background:#fff8fa;position:sticky;top:0}.tool-table th{text-align:left;color:#c5394d;text-transform:uppercase;letter-spacing:.04em;border-bottom:2px solid #f3d3da;padding:10px 12px;font-size:.76rem;font-weight:800}.tool-table td{border-bottom:1px solid #f5f6f8;padding:8px 12px}.tool-table tbody tr:hover{background:#fffafb}.tool-verb{color:var(--ink);cursor:pointer;background:0 0;border:none;border-radius:4px;padding:2px 4px;font-family:inherit;font-size:.94rem;font-weight:700;transition:background .12s}.tool-verb:hover{color:#c5394d;background:#fde7eb}.tool-verb-vi{color:var(--ink-mute);font-size:.85rem;font-style:italic}.lta-hidden{display:none}@media (width<=640px){.lta-wrap{padding:20px 16px 60px}.lta-cat-tabs{flex-wrap:wrap}.lta-tab{padding:7px 12px;font-size:.8rem}.vocab-grid{grid-template-columns:repeat(auto-fill,minmax(130px,1fr))}.alphabet-grid{grid-template-columns:repeat(auto-fill,minmax(95px,1fr));gap:8px}.alphabet-letter-upper{font-size:1.7rem}.alphabet-letter-lower{font-size:1.2rem}.lta-detail-name{font-size:1.35rem}.lta-card-grid{grid-template-columns:1fr}}