:root{--bg: #0f1119;--surface: #181b27;--surface-alt: #1f2335;--accent: #f59e0b;--accent-soft: rgba(245, 158, 11, .15);--accent-text: #fbbf24;--playing: #818cf8;--playing-soft: rgba(129, 140, 248, .2);--played: rgba(99, 102, 241, .15);--text: #e2e8f0;--text-sec: #94a3b8;--text-muted: #64748b;--border: #2a2f40;--radius: 10px;--radius-sm: 6px;--beat-dur: .5s}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;-webkit-text-size-adjust:100%}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);min-height:100dvh;overflow-x:hidden;touch-action:manipulation}#app{max-width:540px;margin:0 auto;padding:16px 16px 140px}.header{margin-bottom:20px}.header__row{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}.header h1{font-size:1.15rem;font-weight:700;letter-spacing:-.02em;text-align:left;flex:1;min-width:min(100%,200px)}.header__app-link{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-sec);font-size:.8rem;font-weight:600;text-decoration:none;white-space:nowrap;transition:border-color .15s,color .15s,background .15s;-webkit-tap-highlight-color:transparent}.header__app-link:hover{border-color:var(--accent);color:var(--accent-text);background:var(--accent-soft)}.header__app-icon{flex-shrink:0;color:var(--accent)}.song-select{margin-bottom:20px}.select-wrap{position:relative}.select-wrap:after{content:"▾";position:absolute;right:12px;top:50%;transform:translateY(-50%);color:var(--text-muted);font-size:.9rem;pointer-events:none}.select-wrap select{width:100%;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:.95rem;padding:10px 32px 10px 12px;outline:none;-moz-appearance:none;appearance:none;-webkit-appearance:none;cursor:pointer;transition:border-color .15s}.select-wrap select:focus{border-color:var(--accent)}.song-select__or{margin-top:8px;text-align:center}.link-btn{background:none;border:none;color:var(--text-muted);font-size:.78rem;cursor:pointer;text-decoration:underline;text-underline-offset:2px;padding:4px 8px;-webkit-tap-highlight-color:transparent;transition:color .15s}.link-btn:hover{color:var(--text-sec)}.song-select__status{margin:8px 0 0;text-align:center;font-size:.75rem;color:var(--text-muted)}.song-select__status.is-error{color:#f87171}.add-song-form{display:flex;flex-direction:column;gap:14px;margin-top:12px}.add-song-form__error{margin:0;font-size:.82rem;color:#f87171}.add-song-form__actions{display:flex;justify-content:flex-end}.add-song-form__submit{font-size:.85rem;color:var(--accent)}.add-song-form input[type=file]{width:100%;font-size:.82rem;color:var(--text-sec)}.preview-dialog{width:min(980px,96vw);max-height:90vh;border:1px solid var(--border);border-radius:var(--radius);background:var(--surface);color:var(--text);padding:12px;overflow:auto}.preview-dialog::backdrop{background:#0009}.preview-dialog__header{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}.preview-block h3{margin-bottom:6px;color:var(--text-sec);font-size:.9rem}#preview-roll{width:100%;border:1px solid var(--border);border-radius:var(--radius-sm);background:#0d1018}#preview-score{max-height:55vh;overflow:auto;border:1px solid var(--border);border-radius:var(--radius-sm);padding:8px;background:#fff}.config{margin-bottom:16px}.config__row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.field label{display:block;font-size:.7rem;font-weight:600;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:5px}.field input[type=number]{width:100%;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:1rem;padding:9px 8px;text-align:center;outline:none;-moz-appearance:textfield;-webkit-appearance:textfield;appearance:textfield;transition:border-color .15s}.field input[type=number]::-webkit-inner-spin-button,.field input[type=number]::-webkit-outer-spin-button{-webkit-appearance:none;display:none}.field input[type=number]:focus{border-color:var(--accent)}.stepper{display:flex}.stepper input{border-radius:0!important;border-left:none!important;border-right:none!important;flex:1;min-width:0}.stepper__btn{background:var(--surface);border:1px solid var(--border);color:var(--text);font-size:1.1rem;width:38px;cursor:pointer;display:flex;align-items:center;justify-content:center;-webkit-tap-highlight-color:transparent;transition:background .1s}.stepper__btn:first-child{border-radius:var(--radius-sm) 0 0 var(--radius-sm)}.stepper__btn:last-child{border-radius:0 var(--radius-sm) var(--radius-sm) 0}.stepper__btn:active{background:var(--surface-alt)}.time-sig{display:flex;align-items:center;gap:3px}.time-sig input{flex:1;min-width:0}.time-sig__slash{color:var(--text-muted);font-size:1.2rem;font-weight:300;flex-shrink:0}.range-section__head{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:14px}.range-section{margin-bottom:20px}.range-row{display:flex;gap:10px;align-items:flex-end}.range-row .field{flex:1}.loop-btn{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-muted);font-size:1.3rem;width:44px;height:44px;cursor:pointer;transition:all .2s ease;flex-shrink:0;-webkit-tap-highlight-color:transparent;display:flex;align-items:center;justify-content:center}.loop-btn.active{background:var(--accent-soft);border-color:var(--accent);color:var(--accent-text)}.range-info{margin-top:8px;font-size:.78rem;color:var(--text-muted);text-align:center}.range-info__sep{margin:0 5px}.count-in-toggle{display:flex;align-items:center;justify-content:center;gap:10px;margin-top:14px;padding:10px 12px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;-webkit-tap-highlight-color:transparent;-webkit-user-select:none;user-select:none}.count-in-toggle:has(input:focus-visible){outline:2px solid var(--accent);outline-offset:2px}.count-in-toggle input{width:18px;height:18px;accent-color:var(--accent);flex-shrink:0}.metronome-playback{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:end;margin-top:8px}.metronome-subdivision{margin:0}.metronome-subdivision select{min-width:110px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);padding:9px 8px}.count-in-toggle__text{font-size:.8rem;color:var(--text-sec);line-height:1.3}.transport.counting-in .transport__measure span{color:var(--accent-text)}.grid-section{margin-bottom:12px}.song-meta{margin-bottom:24px;padding-top:16px;border-top:1px solid var(--border)}.song-meta__title{display:block;width:100%;text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text);font-size:1rem;font-weight:600;padding:10px 12px;margin-bottom:14px;outline:none;transition:border-color .15s}.song-meta__title::placeholder{color:var(--text-muted);font-weight:400}.song-meta__title:focus{border-color:var(--accent)}.config--below-grid{margin-bottom:0}.measures-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(42px,1fr));gap:5px}button.measure{-moz-appearance:none;appearance:none;-webkit-appearance:none;font:inherit;padding:0;margin:0;width:100%}.measure{aspect-ratio:1;display:flex;align-items:center;justify-content:center;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-sm);font-size:.72rem;font-weight:600;color:var(--text-muted);cursor:pointer;transition:all .12s ease;user-select:none;-webkit-user-select:none;scroll-margin-bottom:90px;touch-action:manipulation}.measure.selected{background:var(--accent-soft);border-color:var(--accent);color:var(--accent-text)}.measure.played{background:var(--played);border-color:#6366f14d;color:var(--playing)}.measure.current{background:var(--playing-soft);border-color:var(--playing);color:#fff;animation:beat-pulse var(--beat-dur) ease-in-out infinite}@keyframes beat-pulse{0%,to{box-shadow:0 0 #818cf866}50%{box-shadow:0 0 10px 2px #818cf840}}.transport{position:fixed;bottom:0;left:0;right:0;background:var(--surface);border-top:1px solid var(--border);padding:10px 16px;padding-bottom:calc(10px + env(safe-area-inset-bottom,0px));display:flex;align-items:center;justify-content:space-between;z-index:100;pointer-events:none}.transport>*{pointer-events:auto}.transport__progress{position:absolute;top:0;left:0;right:0;height:3px;background:var(--accent);transform-origin:left;transform:scaleX(0);transition:transform .08s linear}.transport__time{font-size:.78rem;color:var(--text-sec);font-variant-numeric:tabular-nums;min-width:72px}.transport__sep{color:var(--text-muted);margin:0 2px}.transport__controls{display:flex;gap:10px;align-items:center}.transport__btn{border:none;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:all .12s ease;-webkit-tap-highlight-color:transparent}.transport__btn--stop{background:var(--surface-alt);color:var(--text-sec);width:38px;height:38px;font-size:.9rem}.transport__btn--play{background:var(--accent);color:#000;width:50px;height:50px;font-size:1.15rem}.transport__btn--play.active{background:var(--playing);color:#fff}.transport__btn:active{transform:scale(.93)}.transport__btn:disabled{opacity:.3;cursor:not-allowed}.transport__btn:disabled:active{transform:none}.transport__measure{font-size:.78rem;color:var(--text-sec);text-align:right;min-width:72px}.transport__measure span{font-weight:700;color:var(--text);font-size:1rem}@media(max-width:380px){.config__row{grid-template-columns:1fr 1fr}.config__row>.field:first-child{grid-column:1 / -1}.measures-grid{grid-template-columns:repeat(auto-fill,minmax(38px,1fr))}}@media(min-width:480px){#app{padding:24px 24px 110px}.header h1{font-size:1.35rem}.measures-grid{grid-template-columns:repeat(auto-fill,minmax(46px,1fr));gap:6px}}