:root{--bg: #0a0a0a;--surface: #111;--border: #222;--text: #e8e8e8;--text-muted: #666;--accent: #00e5ff;--green: #00c853;--radius: 12px}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;-webkit-font-smoothing:antialiased;min-height:100dvh}.app{max-width:560px;margin:0 auto;padding:20px 16px 40px}header{text-align:center;padding:16px 0 12px}.brand{font-size:1.4rem;font-weight:800;letter-spacing:.08em;color:var(--accent);text-transform:lowercase}.mode-tabs{display:grid;grid-template-columns:1fr 1fr 1fr;gap:6px;margin-bottom:16px}.mode-tab{background:var(--surface);color:var(--text-muted);border:1px solid var(--border);border-radius:8px;font-size:.65rem;font-weight:700;letter-spacing:.1em;padding:12px 6px;cursor:pointer;transition:all .2s}.mode-tab:hover{color:var(--text);border-color:#444}.mode-active{background:var(--accent);color:#000;border-color:var(--accent)}.mode-active:hover{background:var(--accent);color:#000}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:20px 16px;display:flex;flex-direction:column;gap:12px}.card-title{font-size:.7rem;font-weight:700;letter-spacing:.12em;color:var(--text-muted);text-align:center}.card-hint{font-size:.75rem;color:var(--text-muted);text-align:center;line-height:1.5}.ai-textarea{width:100%;background:#0d0d0d;border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:.95rem;padding:14px;font-family:inherit;resize:vertical;min-height:100px;line-height:1.5}.ai-textarea:focus{outline:none;border-color:var(--accent)}.ai-textarea::placeholder{color:#444}.ai-select{width:100%;background:#0d0d0d;border:1px solid var(--border);border-radius:8px;color:var(--text);font-size:.85rem;padding:12px 14px;font-family:inherit;-webkit-appearance:none;-moz-appearance:none;appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center}.ai-select:focus{outline:none;border-color:var(--accent)}.upload-area{width:100%}.upload-label{display:flex;align-items:center;justify-content:center;width:100%;min-height:140px;background:#0d0d0d;border:2px dashed var(--border);border-radius:8px;cursor:pointer;overflow:hidden;transition:border-color .2s}.upload-label:hover{border-color:var(--accent)}.upload-input{display:none}.upload-placeholder{font-size:.75rem;font-weight:700;letter-spacing:.1em;color:var(--text-muted)}.upload-preview{width:100%;max-height:240px;object-fit:contain;border-radius:6px}.upload-label-sm{min-height:80px}.upload-filename{font-size:.78rem;font-weight:600;color:var(--accent);padding:8px;word-break:break-all;text-align:center}.btn-generate{display:block;width:100%;text-align:center;background:var(--accent);color:#000;border:none;border-radius:var(--radius);font-size:.9rem;font-weight:800;letter-spacing:.1em;padding:16px;cursor:pointer;text-decoration:none;transition:opacity .2s}.btn-generate:hover{opacity:.85}.btn-generate:disabled{opacity:.35;cursor:not-allowed}.btn-download{background:var(--green)}.btn-secondary{display:block;width:100%;text-align:center;background:transparent;color:var(--accent);border:1px solid var(--accent);border-radius:var(--radius);font-size:.8rem;font-weight:700;letter-spacing:.08em;padding:14px;cursor:pointer;transition:all .2s}.btn-secondary:hover{background:#00e5ff14}.btn-back{display:block;width:100%;text-align:center;background:transparent;color:var(--text-muted);border:1px solid var(--border);border-radius:var(--radius);font-size:.75rem;font-weight:600;letter-spacing:.06em;padding:12px;cursor:pointer;margin-top:4px;transition:all .2s}.btn-back:hover{color:var(--text);border-color:#444}.btn-cancel{background:transparent;color:var(--text-muted);border:1px solid var(--border);border-radius:8px;font-size:.72rem;font-weight:700;letter-spacing:.08em;padding:10px 20px;cursor:pointer;margin-top:8px;transition:all .2s}.btn-cancel:hover{color:var(--text);border-color:#444}.progress-card{display:flex;flex-direction:column;align-items:center;gap:12px;padding:40px 20px}.shimmer-box{width:100%;height:6px;border-radius:3px;background:linear-gradient(90deg,var(--border) 25%,var(--accent) 50%,var(--border) 75%);background-size:200% 100%;animation:shimmer 1.5s infinite}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}.progress-label{font-size:.85rem;font-weight:600;color:var(--text)}.progress-hint{font-size:.75rem;color:var(--text-muted)}.loading-dots:after{content:"";animation:dots 1.5s steps(4,end) infinite}@keyframes dots{0%{content:""}25%{content:"."}50%{content:".."}75%{content:"..."}}.done-card{gap:14px}.done-title{color:var(--green)}.result-preview{width:100%;border-radius:8px;background:#000}.result-audio{width:100%;margin-top:4px}.error-msg{font-size:.8rem;color:#ff5252;text-align:center;padding:8px}.error-card-msg{background:#ff525214;border:1px solid rgba(255,82,82,.3);border-radius:8px;color:#ff5252;font-size:.82rem;padding:14px;text-align:center;line-height:1.5;word-break:break-word}