:root { --bg: #05060c; --panel: #0d1020; --line: #1f2745; --ink: #e9ecff; --dim: #8f97c4; --cy: #29e6ff; --mg: #ff3fb4; --yl: #ffe14a; }
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.45 ui-monospace, "SF Mono", Menlo, Consolas, monospace; }
main { max-width: 1100px; margin: 0 auto; padding: 0 0 28px; }
.stage { position: relative; background: #000; }
canvas { display: block; width: 100%; height: auto; }
.start { position: absolute; inset: 0; margin: auto; width: max-content; height: max-content; padding: 14px 22px; font: inherit; font-size: 17px; color: #001318; background: var(--cy); border: 0; border-radius: 999px; cursor: pointer; box-shadow: 0 0 28px #29e6ff88; }
.bar { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; padding: 12px 16px 4px; }
button, select, textarea, input { font: inherit; color: var(--ink); }
button { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 9px 13px; cursor: pointer; }
button:hover { border-color: var(--cy); }
label.btn { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 9px 13px; cursor: pointer; }
label.btn:hover { border-color: var(--cy); }
button.on { border-color: var(--cy); color: var(--cy); box-shadow: 0 0 10px #29e6ff44 inset; }
button.rec.on { border-color: var(--mg); color: var(--mg); box-shadow: 0 0 12px #ff3fb455 inset; }
.seg { display: inline-flex; }
.seg button:first-child { border-radius: 10px 0 0 10px; }
.seg button:last-child { border-radius: 0 10px 10px 0; margin-left: -1px; }
.chip { margin-left: auto; color: var(--dim); font-size: 13px; }
.chip.ok { color: var(--yl); }
.lyr { padding: 8px 16px; min-height: 44px; font-size: 18px; line-height: 1.9; }
.lyr span { padding: 2px 3px; border-radius: 6px; cursor: pointer; color: var(--dim); }
.lyr span.w { margin-right: 9px; }
.lyr span.st { color: var(--ink); }
.lyr span.cur { background: var(--mg); color: #14000c; box-shadow: 0 0 14px #ff3fb499; }
.lyr br + span { margin-left: 0; }
.piano { position: relative; height: 110px; margin: 6px 16px 0; user-select: none; touch-action: none; }
.piano .k { position: absolute; top: 0; bottom: 0; background: #dfe4ff; border: 1px solid #05060c; border-radius: 0 0 6px 6px; }
.piano .k.b { background: #12152a; bottom: 40%; z-index: 2; border-color: #333c6b; }
.piano .k.down { background: var(--cy); }
.piano .k.b.down { background: var(--mg); }
.hint { color: var(--dim); font-size: 13px; padding: 4px 16px; margin: 6px 0; }
.panel { display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr)); gap: 12px 18px; padding: 10px 16px; }
.panel label { display: flex; flex-direction: column; gap: 5px; color: var(--dim); font-size: 13px; }
.panel label.full { grid-column: 1 / -1; }
.panel output { color: var(--ink); float: right; }
textarea, select { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 10px; font-size: 16px; width: 100%; }
textarea { resize: vertical; }
input[type=range] { width: 100%; accent-color: var(--cy); }
#saved a { display: inline-block; margin: 4px 16px; color: var(--yl); }
@media (max-width: 600px) { .chip { margin-left: 0; width: 100%; } .piano { height: 96px; margin: 6px 6px 0; } }

.panel label.row { flex-direction: row; align-items: center; gap: 8px; }
.piano .k.zl { background: #b6ecfb; }
.piano .k.b.zl { background: #0d2c38; }
#lyr2 { color: var(--cy); }
body.janus #lyr::before { content: 'cara derecha ▶  '; color: var(--yl); font-size: 12px; }
body.janus #lyr2::before { content: '◀ cara izquierda  '; color: var(--cy); font-size: 12px; }