.navbar{background:#fffffff7;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);box-shadow:0 1px 3px #0000000f;border-bottom:1px solid var(--border, #e5e7eb);position:sticky;top:0;z-index:200}.nav-container{max-width:1200px;margin:0 auto;padding:0 1.5rem;height:56px;display:flex;align-items:center;gap:1rem}.nav-logo{font-size:1.25rem;font-weight:700;color:var(--primary-color, #2563eb);text-decoration:none;letter-spacing:-.3px;flex-shrink:0}.nav-desktop{display:flex;align-items:center;gap:.25rem;flex:1;justify-content:flex-end}.nav-desktop-link{color:#4b5563;text-decoration:none;font-size:.875rem;font-weight:500;padding:.375rem .75rem;border-radius:6px;transition:color .15s,background .15s;white-space:nowrap}.nav-desktop-link:hover{color:var(--primary-color, #2563eb);background:#2563eb0f}.nav-desktop-signup{background:var(--primary-color, #2563eb);color:#fff;text-decoration:none;font-size:.875rem;font-weight:600;padding:.4rem 1rem;border-radius:8px;transition:opacity 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8px;height:64px}.player-track-info{max-width:25%}.player-track-name{font-size:.7rem}.player-time{display:none}.player-controls{gap:2px;display:flex;align-items:center}.player-control-btn{width:28px;height:28px;color:#111827;display:flex;align-items:center;justify-content:center;flex-shrink:0}.player-control-btn svg{width:14px;height:14px}.player-play-btn{width:32px;height:32px;background:#111827!important;color:#fff!important;border:none!important;display:flex;align-items:center;justify-content:center;flex-shrink:0}.player-play-btn svg{width:16px;height:16px}.player-time{font-size:.65rem}}.mobile-player{position:fixed;bottom:0;left:0;right:0;background:#fffffff2;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-top:1px solid #e5e7eb;z-index:1000;box-shadow:0 -4px 20px #00000014;padding-bottom:env(safe-area-inset-bottom)}.mobile-player-progress-bar{position:absolute;top:0;left:0;right:0;height:4px;background:#e5e7eb;cursor:pointer;transition:height .2s ease}.mobile-player-progress-bar:active{height:8px}.mobile-player-progress-fill{height:100%;background:var(--primary-color, #3b82f6);transition:width .1s linear}.mobile-player-content{display:flex;flex-direction:row;align-items:center;gap:8px;padding:8px 12px;min-height:64px}.mobile-track-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}.mobile-track-name{font-size:.75rem;font-weight:500;color:#111827;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mobile-track-meta{font-size:.7rem;color:#6b7280;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.mobile-player-controls{display:flex;align-items:center;gap:4px;flex-shrink:0}.mobile-control-btn{background:transparent;border:none;color:#111827;cursor:pointer;padding:0;display:flex;align-items:center;justify-content:center;width:32px;height:32px;flex-shrink:0}.mobile-control-btn:active{transform:scale(.95)}.mobile-play-btn{width:40px;height:40px;background:#3b82f6;border:none;color:#fff;cursor:pointer;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0}.mobile-play-btn:active{transform:scale(.95)}.mobile-speed-btn{background:transparent;border:1.5px solid #d1d5db;color:#374151;font-size:.65rem;font-weight:600;padding:2px 6px;border-radius:10px;cursor:pointer;white-space:nowrap;min-width:30px;text-align:center;flex-shrink:0}.mobile-speed-btn:active{background:#f3f4f6}.mobile-time{font-size:.7rem;color:#6b7280;font-variant-numeric:tabular-nums;white-space:nowrap;flex-shrink:0;min-width:55px;text-align:right}@media (max-width: 480px){.mobile-player-content{gap:6px;padding:8px 10px}.mobile-track-meta{display:none}.mobile-player-controls{gap:2px}.mobile-control-btn{width:28px;height:28px}.mobile-control-btn svg{width:14px;height:14px}.mobile-play-btn{width:36px;height:36px}.mobile-play-btn svg{width:16px;height:16px}.mobile-time{font-size:.65rem;min-width:50px}}.tts-demo{margin:2rem auto;max-width:500px;background:#fff;border-radius:12px;box-shadow:0 2px 16px #00000012;padding:2rem 1.5rem;text-align:center}.tts-demo h2{margin-bottom:1rem;font-size:1.4rem;color:#2d3748}.tts-demo-form{display:flex;flex-direction:column;gap:1rem;margin-bottom:1rem}.tts-demo-form 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h1{font-size:3.5rem;margin-bottom:1rem;color:var(--primary-color);font-weight:800;letter-spacing:-1px}.subtitle{font-size:1.25rem;color:var(--text-secondary);margin-bottom:2rem;max-width:600px;margin-left:auto;margin-right:auto;line-height:1.7}.cta-buttons{display:flex;gap:1rem;justify-content:center;margin-top:2.5rem}.cta-btn{padding:1rem 2rem;border-radius:10px;text-decoration:none;font-weight:600;font-size:1.1rem;transition:all .2s ease;display:inline-block;-webkit-user-select:none;user-select:none;text-align:center}.cta-btn.primary{background:var(--primary-color);color:#fff;box-shadow:0 4px 12px #2563eb40}.cta-btn.primary:hover{transform:translateY(-2px);box-shadow:0 6px 16px #2563eb59}.cta-btn.secondary{background:var(--surface);color:var(--primary-color);border:2px solid var(--border)}.cta-btn.secondary:hover{background:var(--surface-hover);border-color:var(--primary-color);transform:translateY(-2px)}.features{margin-top:5rem}.features h2{text-align:center;font-size:2.5rem;margin-bottom:3rem;color:var(--text-primary);font-weight:700}.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:2rem}.feature-card{background:#fff;padding:2.5rem;border-radius:16px;text-align:center;transition:all .3s ease;border:1px solid var(--border);box-shadow:0 2px 4px #0000000a}.feature-card:hover{transform:translateY(-5px);box-shadow:0 12px 24px #00000014;border-color:var(--primary-light)}.feature-card h3{font-size:1.5rem;margin-bottom:1rem;color:var(--text-primary);font-weight:600}.feature-card p{color:var(--text-secondary);line-height:1.6}.auth-container{display:flex;justify-content:center;align-items:top;padding-right:2rem;padding-left:2rem;padding-bottom:3rem;width:100%;margin:auto}.auth-card{background:#fff;padding:3rem;border-radius:16px;box-shadow:0 4px 6px #0000000d,0 10px 15px #0000000d;width:100%;max-width:440px;border:1px solid var(--border)}.auth-card h2{margin-top:0;margin-bottom:2rem;color:var(--text-primary);text-align:center;font-size:1.875rem;font-weight:700;user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none}.form-group label{display:block;margin-bottom:.5rem;color:var(--text-primary);font-weight:600;font-size:.9rem;user-select:none;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none}.form-group input{width:100%;padding:.875rem;border:1.5px solid var(--border);border-radius:8px;background:var(--surface);color:var(--text-primary);font-size:1rem;box-sizing:border-box;transition:all .2s ease}.form-group input:focus{outline:none;border-color:var(--primary-color);background:#fff;box-shadow:0 0 0 3px #2563eb1a}.form-group input:disabled{opacity:.6;cursor:not-allowed;background:var(--surface-hover)}.submit-btn{width:100%;padding:.875rem;background:var(--primary-color);color:#fff;border:none;border-radius:8px;font-size:1rem;font-weight:600;cursor:pointer;transition:all .2s 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#0000000d}.sidebar::-webkit-scrollbar{width:12px}.sidebar::-webkit-scrollbar-track{background:transparent}.sidebar::-webkit-scrollbar-thumb{background:#e5e7eb;border-radius:6px}.sidebar::-webkit-scrollbar-thumb:hover{background:#d1d5db}.sidebar-section{display:flex;flex-direction:column;gap:8px}.sidebar-header{display:flex;align-items:center;justify-content:space-between;padding:8px 12px;margin-bottom:4px}.sidebar-header h3{font-size:.875rem;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:#6b7280;margin:0}.sidebar-btn{display:flex;align-items:center;gap:12px;padding:10px 12px;background:transparent;border:none;border-radius:8px;color:#4b5563;font-size:.9375rem;font-weight:600;cursor:pointer;transition:all .2s ease;width:100%;text-align:left;min-height:40px}.sidebar-btn:hover{background:#f3f4f6;color:#111827}.sidebar-btn.active{background:#dbeafe;color:#2563eb}.sidebar-btn 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