:root{--bg: #f8f7f4;--surface: #ffffff;--ink: #111827;--ink-soft: #4b5563;--line: #e5e3dd;--accent: #d97706;--accent-ink: #b45309;--stage: #0d1320;--radius: 14px;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;color:var(--ink)}*{box-sizing:border-box}body{margin:0;background:var(--bg);-webkit-font-smoothing:antialiased}.boot-header{max-width:720px;margin:0 auto;padding:48px 20px 0}.boot-header .brand{font-weight:700;letter-spacing:-.01em}.boot-sub{color:var(--ink-soft);font-size:1.05rem}.site{min-height:100vh;display:flex;flex-direction:column}.site-header{display:flex;align-items:center;justify-content:space-between;max-width:880px;width:100%;margin:0 auto;padding:18px 20px}.brand{display:inline-flex;align-items:center;gap:9px;font-weight:700;font-size:1.02rem;color:var(--ink);text-decoration:none;letter-spacing:-.01em}.brand-mark{display:inline-flex;align-items:flex-end;gap:2px;height:16px;padding:2px 3px;background:var(--ink);border-radius:3px}.brand-mark span{width:2px;background:#fff;display:block}.brand-mark span:nth-child(1){height:10px}.brand-mark span:nth-child(2){height:7px}.brand-mark span:nth-child(3){height:10px}.brand-mark span:nth-child(4){height:7px}.site-nav{display:flex;gap:4px;flex-wrap:wrap}.site-nav a{color:var(--ink-soft);text-decoration:none;font-size:.86rem;padding:6px 10px;border-radius:8px}.site-nav a:hover{background:#edeae4;color:var(--ink)}.site-nav a.active{background:var(--ink);color:#fff}main{flex:1;width:100%;max-width:880px;margin:0 auto;padding:8px 20px 56px}.hero h1{font-size:clamp(1.6rem,4vw,2.3rem);letter-spacing:-.02em;line-height:1.15;margin:18px 0 10px;max-width:640px}.hero-sub{color:var(--ink-soft);font-size:1.08rem;line-height:1.5;margin:0 0 26px;max-width:560px}.dropzone{background:var(--surface);border:1.5px dashed #c9c5bb;border-radius:var(--radius);padding:44px 24px 36px;text-align:center;cursor:pointer;transition:border-color .15s,box-shadow .15s}.dropzone:hover,.dropzone.dragging{border-color:var(--accent);box-shadow:0 1px #d9770626}.drop-piano{display:flex;justify-content:center;align-items:flex-end;gap:5px;height:46px;margin-bottom:18px}.drop-piano span{width:7px;border-radius:2px;background:var(--ink);display:block}.drop-piano span:nth-child(1){height:46px}.drop-piano span:nth-child(2){height:30px;background:#6b7280}.drop-piano span:nth-child(3){height:46px}.drop-piano span:nth-child(4){height:30px;background:#6b7280}.drop-piano span:nth-child(5){height:46px}.drop-piano span:nth-child(6){height:30px;background:#6b7280}.drop-piano span:nth-child(7){height:46px}.drop-title{font-size:1.15rem;font-weight:600;margin:0 0 6px}.drop-formats{color:var(--ink-soft);font-size:.9rem;margin:0 0 18px}.drop-fine{color:var(--ink-soft);font-size:.82rem;margin:16px 0 0}.btn{display:inline-flex;align-items:center;gap:8px;border:1px solid transparent;border-radius:10px;padding:10px 18px;font-size:.95rem;font-weight:600;cursor:pointer;text-decoration:none;line-height:1;transition:transform .05s,opacity .15s}.btn:active{transform:translateY(1px)}.btn:disabled{opacity:.6;cursor:default}.btn-primary{background:var(--ink);color:#fff}.btn-primary:hover{opacity:.9}.btn-secondary{background:#fff;color:var(--ink);border-color:#d6d2c9}.btn-secondary:hover{border-color:var(--ink)}.btn-accent{background:var(--accent);color:#fff}.btn-accent:hover{background:var(--accent-ink)}.free-tag{font-size:.72rem;font-weight:700;background:#dcfce7;color:#15803d;border-radius:999px;padding:3px 8px}.status-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:44px 24px;text-align:center}.status-title{font-size:1.1rem;font-weight:600;margin:0 0 6px}.status-sub{color:var(--ink-soft);font-size:.9rem;margin:0}.progress{height:6px;background:#edeae4;border-radius:999px;overflow:hidden;max-width:340px;margin:14px auto 0}.progress-fill{height:100%;background:var(--accent);border-radius:999px;transition:width .15s}.spinner{width:26px;height:26px;border:3px solid #e5e3dd;border-top-color:var(--accent);border-radius:50%;margin:0 auto 14px;animation:spin .9s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.done-filename{color:var(--ink-soft);font-size:.88rem;margin:0 0 10px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.result{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px}.result-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin-bottom:18px}.stat{display:flex;flex-direction:column;gap:2px;background:var(--bg);border-radius:10px;padding:12px 14px}.stat-value{font-weight:700;font-size:1.12rem;letter-spacing:-.01em}.stat-label{color:var(--ink-soft);font-size:.78rem}.pianoroll-wrap{border-radius:10px;overflow:hidden;margin-bottom:18px}.pianoroll-wrap canvas{display:block}.result-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap}.timecode{color:var(--ink-soft);font-variant-numeric:tabular-nums;font-size:.9rem}.download-group{display:flex;gap:10px;flex-wrap:wrap;margin-left:auto}.fine-print{color:var(--ink-soft);font-size:.82rem;margin:14px 0 0}.error-text{color:#b91c1c;font-size:.9rem;margin:12px 0 0}.link-btn{background:none;border:none;color:var(--ink-soft);font-size:.85rem;cursor:pointer;text-decoration:underline;padding:0;margin-top:14px}.link-btn:hover{color:var(--ink)}.recents{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:18px}.recents-label{color:var(--ink-soft);font-size:.82rem}.recent-chip{max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;background:var(--surface);border:1px solid var(--line);border-radius:999px;color:var(--ink);font-size:.8rem;padding:6px 12px;cursor:pointer}.recent-chip:hover{border-color:var(--ink)}.page-body{max-width:640px;margin-top:44px}.page-body h2{font-size:1.15rem;letter-spacing:-.01em;margin:26px 0 8px}.page-body p,.page-body li{color:var(--ink-soft);font-size:.95rem;line-height:1.65}.page-body strong{color:var(--ink)}.page-body ol,.page-body ul{padding-left:20px}.site-footer{border-top:1px solid var(--line);padding:20px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;max-width:880px;width:100%;margin:0 auto;color:var(--ink-soft);font-size:.8rem}@media(max-width:640px){.download-group{margin-left:0;width:100%}.download-group .btn{flex:1;justify-content:center}}