:root{--bg-color: #f8fafc;--bg-gradient: radial-gradient(at 0% 0%, hsla(253,16%,7%,1) 0, transparent 50%), radial-gradient(at 50% 0%, hsla(225,39%,30%,1) 0, transparent 50%), radial-gradient(at 100% 0%, hsla(339,49%,30%,1) 0, transparent 50%);--surface: rgba(255, 255, 255, .7);--surface-solid: #ffffff;--border: rgba(226, 232, 240, .8);--text: #0f172a;--text-muted: #475569;--text-light: #94a3b8;--accent: #4f46e5;--accent-hover: #4338ca;--accent-soft: #e0e7ff;--danger: #e11d48;--danger-hover: #be123c;--danger-bg: #ffe4e6;--cut-region: rgba(225, 29, 72, .35);--selection: rgba(79, 70, 229, .25);--radius: 20px;--shadow: 0 10px 40px -10px rgba(0, 0, 0, .08);--shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, .05);font-family:DM Sans,system-ui,sans-serif}*,*:before,*:after{box-sizing:border-box}body{margin:0;min-height:100vh;background-color:var(--bg-color);background-image:radial-gradient(circle at 15% 50%,rgba(99,102,241,.12),transparent 25%),radial-gradient(circle at 85% 30%,rgba(236,72,153,.12),transparent 25%);background-attachment:fixed;color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}#app{min-height:100vh;display:flex;flex-direction:column}.header{padding:3rem 1.5rem 1rem;text-align:center}.header-inner{max-width:900px;margin:0 auto}.logo{margin:0;font-size:2.5rem;font-weight:800;letter-spacing:-.03em;background:linear-gradient(135deg,#312e81,#4f46e5,#e11d48);-webkit-background-clip:text;-webkit-text-fill-color:transparent;display:inline-block;text-decoration:none}.tagline{margin:.5rem 0 0;color:var(--text-muted);font-size:1.1rem;font-weight:500;line-height:1.5}.main{flex:1;max-width:900px;width:100%;margin:0 auto;padding:1rem 1.5rem 3rem}.dropzone{background:var(--surface);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border:2px dashed #cbd5e1;border-radius:var(--radius);padding:4rem 2rem;text-align:center;cursor:pointer;transition:all .25s cubic-bezier(.4,0,.2,1);box-shadow:var(--shadow)}.dropzone:hover,.dropzone:focus-visible{border-color:var(--accent);background:var(--surface-solid);transform:translateY(-2px);box-shadow:0 20px 40px -10px #4f46e526;outline:none}.dropzone.dragover{border-color:var(--accent);background:var(--accent-soft);transform:scale(1.02)}.dropzone-icon-wrapper{width:80px;height:80px;margin:0 auto 1.5rem;background:linear-gradient(135deg,#e0e7ff,#fce7f3);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--accent);box-shadow:0 8px 16px #0000000d}.dropzone-icon-svg{width:40px;height:40px}.dropzone-title{margin:0;font-size:1.4rem;font-weight:700;color:var(--text)}.dropzone-hint{margin:.5rem 0 0;color:var(--text-muted);font-size:1rem}.hidden{display:none!important}.editor{background:var(--surface-solid);border-radius:var(--radius);box-shadow:var(--shadow);padding:2rem;border:1px solid var(--border)}.file-bar{display:flex;align-items:center;justify-content:space-between;gap:1rem;margin-bottom:1.5rem;flex-wrap:wrap;padding-bottom:1rem;border-bottom:1px solid var(--border)}.file-name{font-weight:700;font-size:1.1rem;word-break:break-all;display:flex;align-items:center;gap:.5rem}.file-name:before{content:"🎵";font-size:1.2rem}.waveform{border-radius:12px;overflow-x:auto;overflow-y:hidden;background:#f1f5f9;min-height:128px;box-shadow:inset 0 2px 4px #00000005}.zoom-row{display:flex;align-items:center;gap:.5rem;margin-top:1rem;flex-wrap:wrap}.zoom-slider{flex:1;min-width:120px;max-width:280px;accent-color:var(--accent);height:6px;border-radius:3px;background:#e2e8f0;outline:none;-webkit-appearance:none}.zoom-slider::-webkit-slider-thumb{-webkit-appearance:none;width:16px;height:16px;border-radius:50%;background:var(--accent);cursor:pointer;box-shadow:0 2px 4px #0003}.btn-zoom{font-size:1.25rem;line-height:1;font-weight:500;border-radius:50%;width:32px;height:32px;display:flex;align-items:center;justify-content:center}.btn-zoom-fit{padding:.4rem .85rem;font-size:.85rem;border-radius:99px}.zoom-hint{font-size:.85rem;color:var(--text-light);margin-left:auto;display:flex;align-items:center;gap:.4rem}@media(max-width:560px){.zoom-hint{margin-left:0;width:100%}}.transport{display:flex;align-items:center;gap:1.25rem;margin-top:1.5rem;flex-wrap:wrap;background:#f8fafc;padding:1rem;border-radius:16px}.transport-hint{flex:1;min-width:200px;font-size:.9rem;color:var(--text-muted)}.time-display{font-variant-numeric:tabular-nums;font-size:1rem;font-weight:600;color:var(--text);background:#fff;padding:.4rem .8rem;border-radius:8px;box-shadow:var(--shadow-sm);border:1px solid var(--border)}.btn{font-family:inherit;font-size:.95rem;font-weight:600;border:none;border-radius:10px;padding:.65rem 1.25rem;cursor:pointer;transition:all .2s;display:inline-flex;align-items:center;justify-content:center;gap:.5rem}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important;box-shadow:none!important}.btn-primary{background:var(--accent);color:#fff;box-shadow:0 4px 12px #4f46e540}.btn-primary:hover:not(:disabled){background:var(--accent-hover);transform:translateY(-1px);box-shadow:0 6px 16px #4f46e54d}.btn-primary.btn-cut-remove{background:var(--danger);box-shadow:0 4px 12px #e11d4840}.btn-primary.btn-cut-remove:hover:not(:disabled){background:var(--danger-hover);box-shadow:0 6px 16px #e11d484d}.btn-export{background:linear-gradient(135deg,#10b981,#059669);color:#fff;padding:.85rem 2rem;font-size:1.1rem;border-radius:12px;box-shadow:0 8px 20px #10b98140}.btn-export:hover:not(:disabled){background:linear-gradient(135deg,#059669,#047857);transform:translateY(-2px);box-shadow:0 12px 24px #10b9814d}.btn-ghost{background:transparent;color:var(--text-muted);border:1px solid var(--border)}.btn-ghost:hover:not(:disabled){background:#f1f5f9;color:var(--text)}.btn-icon{width:48px;height:48px;padding:0;background:var(--accent);color:#fff;border:none;font-size:1.25rem;border-radius:50%;box-shadow:0 4px 12px #4f46e54d}.btn-icon:hover:not(:disabled){background:var(--accent-hover);transform:scale(1.05)}.mark-row{display:flex;gap:.75rem;margin-top:1.5rem;flex-wrap:wrap}.waveform [part=region].region-draft{cursor:grab;border:2px solid rgba(79,70,229,.85);box-sizing:border-box}.waveform [part=region].region-delete-mark{pointer-events:all;cursor:pointer;border:2px solid rgba(225,29,72,.65);box-sizing:border-box}.waveform [part=region].region-cut-selected{border-color:#be123c;box-shadow:0 0 0 2px #fff,0 0 0 4px #e11d48;z-index:6}.cut-item{cursor:pointer}.cut-item-selected{border-color:#e11d48!important;box-shadow:0 0 0 2px #e11d48!important}.actions-row{display:flex;gap:.75rem;margin-top:1.25rem;flex-wrap:wrap}.cuts-panel{margin-top:2rem;padding-top:2rem;border-top:1px solid var(--border)}.panel-title{margin:0;font-size:1.25rem;display:flex;align-items:center;gap:.75rem;font-weight:700}.badge{background:var(--danger);color:#fff;font-size:.85rem;padding:.15rem .6rem;border-radius:999px;font-weight:600}.panel-desc{margin:.5rem 0 1.5rem;font-size:.95rem;color:var(--text-muted)}.cuts-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1rem}.cuts-list:not(:empty)+.cuts-empty{display:none}.cut-item{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.85rem 1rem;background:var(--danger-bg);border-radius:12px;border:1px solid rgba(225,29,72,.2);font-variant-numeric:tabular-nums;font-size:.95rem;font-weight:500;transition:all .2s}.cut-item:hover{border-color:#e11d4866;transform:translateY(-1px);box-shadow:var(--shadow-sm)}.cut-item-label{flex:1;color:#9f1239}.btn-remove-cut{background:#fff;border:1px solid rgba(225,29,72,.2);color:var(--danger);cursor:pointer;font-weight:600;font-size:.85rem;padding:.35rem .75rem;border-radius:6px;transition:all .15s}.btn-remove-cut:hover{background:var(--danger);color:#fff}.cuts-empty{margin:0;font-size:1rem;color:var(--text-muted);background:#f8fafc;padding:1.5rem;border-radius:12px;border:1px dashed var(--border);text-align:center}.export-row{margin-top:2.5rem;padding-top:2rem;border-top:1px solid var(--border);display:flex;align-items:center;gap:1.5rem;flex-wrap:wrap}.export-status{margin:0;font-size:1rem;font-weight:500;color:var(--text-muted);flex:1}.info{margin-top:3rem}.info h2{margin:0 0 1.25rem;font-size:1.5rem;font-weight:800;letter-spacing:-.02em}.steps{list-style:none;counter-reset:step;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:1rem}.steps li,.features li{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:1.25rem;box-shadow:var(--shadow-sm)}.steps li{counter-increment:step}.steps li:before{content:counter(step);display:inline-flex;align-items:center;justify-content:center;width:2rem;height:2rem;border-radius:50%;background:var(--accent-soft);color:var(--accent);font-weight:800;margin-bottom:.75rem}.steps h3{margin:0 0 .35rem;font-size:1.1rem}.steps p,.features li,.faq p{margin:0;color:var(--text-muted);font-size:.95rem}.features{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:1rem}.features strong{display:block;color:var(--text);margin-bottom:.25rem}.faq{display:grid;gap:.75rem}.faq details{background:var(--surface-solid);border:1px solid var(--border);border-radius:12px;padding:1rem 1.25rem}.faq summary{cursor:pointer;font-weight:700}.faq details[open] summary{margin-bottom:.5rem}.footer{text-align:center;padding:2rem;font-size:.9rem;color:var(--text-muted)}.footer p{margin:.25rem 0}.footer a{color:var(--accent);font-weight:600;text-decoration:none}