:root{--ink:#14213d;--muted:#4a5568;--paper:#f7f7f4;--card:#fff;--line:#d5d8de;--primary:#1d4ed8;--primary-dark:#1e3a8a;--ok:#166534;--warn:#92400e;--bad:#b91c1c;--radius:12px;color-scheme:light}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{background:var(--paper);color:var(--ink);margin:0;font:17px/1.6 system-ui,-apple-system,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif}body.no-scroll{overflow:hidden}a{color:var(--primary);text-underline-offset:2px}a:hover{color:var(--primary-dark)}:focus-visible{outline-offset:2px;outline:3px solid #f59e0b}img{max-width:100%;height:auto}[hidden]{display:none!important}.skip{background:var(--ink);color:#fff;z-index:50;padding:12px 16px;position:absolute;top:0;left:-9999px}.skip:focus{top:8px;left:8px}.site-header{background:var(--ink);color:#fff;flex-wrap:wrap;align-items:center;gap:0 16px;padding:0 16px;display:flex}.brand{color:#fff;align-items:center;gap:8px;min-height:48px;font-size:17px;font-weight:700;text-decoration:none;display:inline-flex}.brand:hover{color:#fff}.nav{scrollbar-width:none;gap:4px;margin-left:auto;display:flex;overflow-x:auto}.nav::-webkit-scrollbar{display:none}.nav a{color:#fff;white-space:nowrap;border-bottom:3px solid #0000;align-items:center;min-height:48px;padding:0 12px;font-size:16px;text-decoration:none;display:inline-flex}.nav a:hover{color:#fff;background:#ffffff14}.nav a[aria-current=page]{border-bottom-color:#93c5fd;font-weight:600}@media (width<=760px){.nav{border-top:1px solid #ffffff26;width:calc(100% + 32px);margin:0 -16px;padding:0 8px}}.wrap{max-width:860px;margin:0 auto;padding:12px 16px 40px}h1{margin:8px 0 6px;font-size:1.6rem;line-height:1.25}h2{margin:2rem 0 .5rem;font-size:1.3rem;line-height:1.3}h3{margin:1.3rem 0 .3rem;font-size:1.08rem}p,ul,ol{margin:0 0 .9rem}li{margin-bottom:.35rem}.lede{color:var(--muted);margin-bottom:10px;font-size:1rem}.fine{color:var(--muted);font-size:.9rem}.notice{background:#fff7e6;border:1px solid #f0c36d;border-radius:8px;padding:10px 12px}@media (width>=761px){h1{margin-top:16px;font-size:2rem}.lede{font-size:1.05rem}}.tool{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);margin:10px 0 18px;padding:12px;box-shadow:0 1px 2px #14213d0f}.tabs{border-bottom:1px solid var(--line);gap:6px;margin-bottom:10px;display:flex}.tabs button{min-height:48px;font:inherit;color:var(--muted);cursor:pointer;background:0 0;border:0;border-bottom:3px solid #0000;flex:1;font-size:16px}.tabs button[aria-selected=true]{color:var(--ink);border-bottom-color:var(--primary);font-weight:600}.btn{border:2px solid var(--primary);min-height:48px;color:var(--primary);font:inherit;cursor:pointer;background:#fff;border-radius:10px;justify-content:center;align-items:center;padding:0 18px;font-size:16px;font-weight:600;display:inline-flex}.btn:hover{background:#eef2ff}.btn:disabled{opacity:.55;cursor:not-allowed}.btn-primary{background:var(--primary);color:#fff}.btn-primary:hover{background:var(--primary-dark);border-color:var(--primary-dark)}.row{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.row>.btn{flex:140px}.sync-stage{align-items:center;gap:12px;margin-bottom:8px;display:flex}.flash{border:2px solid var(--ink);background:#1f2937;border-radius:12px;flex:none;width:88px;height:88px}.flash.on{background:#fde047}.readout{font-variant-numeric:tabular-nums;display:block}.readout .big{font-size:2.6rem;font-weight:800;line-height:1}.readout .unit{margin-left:4px;font-size:1.1rem;font-weight:600}.readout .sub{color:var(--muted);margin-top:4px;font-size:.88rem;display:block}.slider-label{font-size:.95rem;font-weight:600;display:block}input[type=range]{width:100%;min-height:44px;accent-color:var(--primary);margin:0}.scale{color:var(--muted);justify-content:space-between;margin:-4px 0 8px;font-size:.8rem;display:flex}.status{min-height:1.5em;margin:8px 0 0;font-size:.95rem}.tap-pad{width:100%;min-height:200px;color:var(--ink);font:inherit;-webkit-user-select:none;user-select:none;touch-action:manipulation;background:#e8edf7;border:2px dashed #8aa0c8;border-radius:14px;justify-content:center;align-items:center;margin:8px 0;font-size:1.15rem;font-weight:700;display:flex}.tap-pad.flash{background:#fde047;border-style:solid;border-color:#ca8a04}.tap-pad[data-phase=beat],.tap-pad[data-phase=audio]{background:#dbeafe;border-style:solid}.tap-pad.compact{min-height:120px}.result{border-top:1px solid var(--line);margin-top:12px;padding-top:10px}.result-label{color:var(--muted);margin:0;font-weight:600}.result-big{font-variant-numeric:tabular-nums;margin:0;font-size:2.6rem;font-weight:800;line-height:1.1}.result-big .unit{font-size:1.2rem}.result-meta,.result-runs{margin:2px 0;font-size:.92rem}.result-verdict{margin:6px 0;font-weight:600}.result-note{margin:6px 0}.ab{grid-template-columns:1fr 1fr;gap:8px;margin:8px 0;display:grid}.ab-slot{border:1px solid var(--line);border-radius:10px;padding:8px;font-size:.92rem}.ab-slot strong{display:block}.bpm{flex-wrap:wrap;align-items:center;gap:10px;font-size:.95rem;display:flex}.bpm input{flex:160px}.info{grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:6px;margin:8px 0 0;font-size:.9rem;display:grid}.info div{background:var(--paper);border-radius:8px;padding:6px 8px}.problem{color:#7f1d1d;background:#fdecec;border:1px solid #f3b4b4;border-radius:8px;margin:8px 0 0;padding:10px 12px}.warn{color:#6b3a07;background:#fff7e6;border:1px solid #f0c36d;border-radius:8px;margin:8px 0 0;padding:10px 12px}.calc{border:1px solid var(--line);background:#fff;border-radius:12px;gap:10px;margin:12px 0;padding:12px;display:grid}.calc-row{grid-template-columns:minmax(0,1fr);gap:6px;display:grid}.calc-row span{display:block}.calc p{margin:0}.visually-hidden{clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;width:1px;height:1px;position:absolute;overflow:hidden}.calc label{font-size:.95rem;font-weight:600;display:block}.calc select,.calc input{width:100%;min-height:48px;font:inherit;color:var(--ink);background:#fff;border:1px solid #8a94a6;border-radius:8px;padding:0 10px}.calc output{font-size:1.6rem;font-weight:800}table{border-collapse:collapse;width:100%;margin:0 0 1rem;font-size:.95rem}th,td{text-align:left;border-bottom:1px solid var(--line);vertical-align:top;padding:8px 6px}th{background:#eceff4}.table-wrap{overflow-x:auto}details{background:var(--card);border:1px solid var(--line);border-radius:10px;margin:8px 0;padding:0 14px}summary{cursor:pointer;align-items:center;min-height:48px;padding:8px 0;font-weight:600;display:flex}details[open] summary{border-bottom:1px solid var(--line);margin-bottom:8px}.tool-list{padding-left:1.1rem}.tool-list a{min-height:32px;font-weight:600;display:inline-block}.loop-overlay{z-index:100;color:#fff;background:#000;flex-direction:column;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.loop-overlay [data-loop-flash]{background:#111;border-radius:16px;width:min(60vw,60vh);height:min(60vw,60vh)}.loop-overlay [data-loop-flash].on{background:#fff}.loop-overlay.reduced [data-loop-flash].on{background:#9ca3af}.loop-overlay .counter{font-variant-numeric:tabular-nums;margin-top:16px;font:700 2.4rem/1 ui-monospace,Menlo,Consolas,monospace}.loop-overlay .sweep-track{height:18px;position:absolute;bottom:12vh;left:0;right:0}.loop-overlay .sweep-track:after{content:"";background:#ef4444;width:2px;position:absolute;top:-10px;bottom:-10px;left:50%}.loop-overlay [data-loop-sweep]{background:#22d3ee;width:6px;height:18px;position:absolute;top:0;left:0}.loop-overlay.reduced .sweep-track{display:none}.loop-overlay .exit-hint{text-align:center;color:#d1d5db;font-size:.95rem;position:absolute;top:12px;left:0;right:0}.affiliate{border:1px solid var(--line);background:var(--card);border-radius:10px;margin:12px 0;padding:10px 14px}.aff-title{margin-bottom:4px;font-weight:700}.ad-slot{min-height:120px;margin:24px 0}.ad-label{color:var(--muted);margin:0 0 4px;font-size:.8rem}.site-footer{color:var(--muted);background:#e9ebef;padding:20px 16px 32px;font-size:.92rem}.footer-links{flex-wrap:wrap;gap:4px 6px;max-width:860px;margin:0 auto 8px;padding:0;list-style:none;display:flex}.footer-links a{min-height:44px;color:var(--ink);align-items:center;padding:0 8px;display:inline-flex}.site-footer p{max-width:860px;margin:0 auto;padding:0 8px}@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}@media (width<=420px){h1{margin:4px 0;font-size:1.35rem}.lede{margin-bottom:8px;font-size:.95rem;line-height:1.45}.tabs button{white-space:nowrap;padding:0 4px}.flash{width:72px;height:72px}.sync .btn{white-space:nowrap;padding-left:10px;padding-right:10px}}