:root{--accent: #4f46e5;--accent-hover: #4338ca;--bg: #f4f5f7;--card-bg: #ffffff;--text: #1f2937;--text-sub: #6b7280;--border: #e5e7eb;--success: #059669;--error: #dc2626;--radius: 12px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Apple SD Gothic Neo,Pretendard,Malgun Gothic,Segoe UI,Roboto,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh}.container{max-width:720px;margin:0 auto;padding:32px 16px 64px}header{text-align:center;margin-bottom:28px}header h1{font-size:1.75rem;font-weight:800;letter-spacing:-.02em}header p{color:var(--text-sub);font-size:.9rem;margin-top:6px}.badge{display:inline-block;font-size:.72rem;font-weight:700;color:#fff;background:var(--text-sub);border-radius:999px;padding:2px 10px;margin-left:6px;vertical-align:middle}.badge.webgpu{background:var(--success)}.card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:20px;box-shadow:0 1px 3px #0000000a}#loadingCard .size-note{font-size:.82rem;color:var(--text-sub);margin-bottom:12px}.progress-track{width:100%;height:10px;background:var(--border);border-radius:999px;overflow:hidden}.progress-bar{height:100%;width:0%;background:var(--accent);border-radius:999px;transition:width .2s ease}.progress-label{display:flex;justify-content:space-between;font-size:.8rem;color:var(--text-sub);margin-top:8px}.field{margin-bottom:18px}.field:last-child{margin-bottom:0}.field label{display:block;font-size:.85rem;font-weight:600;margin-bottom:6px}.field select,.field textarea{width:100%;padding:10px 12px;border:1px solid var(--border);border-radius:8px;font-size:.95rem;font-family:inherit;background:#fff;color:var(--text)}.field textarea{min-height:120px;resize:vertical}.field select:focus,.field textarea:focus{outline:2px solid var(--accent);outline-offset:1px;border-color:var(--accent)}.row{display:grid;grid-template-columns:1fr 1fr;gap:14px}@media (max-width: 520px){.row{grid-template-columns:1fr}}.slider-row{display:flex;align-items:center;gap:12px}.slider-row input[type=range]{flex:1;accent-color:var(--accent)}.slider-value{min-width:44px;text-align:right;font-variant-numeric:tabular-nums;font-size:.9rem;font-weight:600}.hint{font-size:.75rem;color:var(--text-sub);margin-top:4px}#generateBtn{width:100%;padding:14px;font-size:1.05rem;font-weight:700;color:#fff;background:var(--accent);border:none;border-radius:10px;cursor:pointer;transition:background .15s ease}#generateBtn:hover:not(:disabled){background:var(--accent-hover)}#generateBtn:disabled{background:#c7c9d1;cursor:not-allowed}#status{font-size:.88rem;padding:10px 14px;border-radius:8px;margin-bottom:20px;display:none}#status.info{display:block;background:#eef2ff;color:var(--accent)}#status.success{display:block;background:#ecfdf5;color:var(--success)}#status.error{display:block;background:#fef2f2;color:var(--error)}#resultCard{display:none}#resultCard.visible{display:block}#resultCard h2{font-size:1.05rem;margin-bottom:14px}#audioPlayer{width:100%;margin-bottom:14px}.stats{display:flex;gap:12px;margin-bottom:16px}.stat{flex:1;background:var(--bg);border-radius:8px;padding:10px 14px;text-align:center}.stat .label{font-size:.75rem;color:var(--text-sub)}.stat .value{font-size:1.05rem;font-weight:700;font-variant-numeric:tabular-nums}#downloadBtn:hover,#downloadMp3Btn:hover{background:#e0e7ff}.downloads{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}#downloadBtn,#downloadMp3Btn{display:inline-block;padding:10px 20px;font-size:.9rem;font-weight:600;color:var(--accent);background:#eef2ff;border-radius:8px;text-decoration:none}footer{text-align:center;font-size:.78rem;color:var(--text-sub);margin-top:8px}footer a{color:var(--accent);text-decoration:none}