:root{font-family:"BIZ UDPGothic","Yu Gothic",system-ui,sans-serif;color:#314c47;background:#fafaf6;font-size:16px;font-synthesis:none;--ink:#314c47;--muted:#657770;--line:#dfe7e1;--mint:#e2f2e9;--lavender:#ece8f7;--peach:#fae5dc}
*{box-sizing:border-box}body{margin:0}button,input,select{font:inherit}button,summary{cursor:pointer}button,input,select{-webkit-tap-highlight-color:transparent}button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible,.segment input:focus-visible+span{outline:3px solid #537c70;outline-offset:4px}[hidden]{display:none!important}
.app{max-width:800px;margin:auto;padding:36px 28px 56px}header{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-bottom:28px}header>div{min-width:0}h1{font-size:2rem;letter-spacing:.06em;line-height:1.2;margin:0;font-weight:850}.small-title{font-size:.74rem;line-height:1.6;letter-spacing:.025em;color:var(--muted);margin:6px 0 0;max-width:290px}.quiet{border:1px solid var(--line);border-radius:12px;padding:11px 16px;min-height:44px;background:#fff;color:var(--ink);font-size:.85rem;font-weight:700;white-space:nowrap}.quiet:hover{background:#f1f5f0}
.stage{position:relative;min-height:278px;padding:58px 24px 25px;background:var(--mint);border-radius:28px;text-align:center;display:flex;flex-direction:column;align-items:center;justify-content:center;transition:background .2s}.phase{font-size:.85rem;font-weight:600;margin:0;color:#526e61}.stage h2{font-size:clamp(3.4rem,10vw,5.2rem);line-height:1.08;font-weight:800;letter-spacing:-.04em;margin:10px 0 14px}.stage #detail{font-size:.9rem;line-height:1.7;margin:0;color:#52675e}.round{position:absolute;top:18px;right:20px;padding:6px 12px;border-radius:20px;background:#ffffffb3;font-size:.78rem;font-weight:600;font-variant-numeric:tabular-nums}.round strong{font-weight:750}.track{font-size:.78rem;line-height:1.6;color:#52675e;margin-top:16px;max-width:100%;overflow-wrap:anywhere}.beat{display:flex;align-items:center;justify-content:center;gap:5px;height:18px;margin-top:12px}.beat i{display:block;width:4px;height:4px;background:#74968a;border-radius:4px}.stage.playing .beat i{animation:beat .6s ease-in-out infinite alternate}.stage.playing .beat i:nth-child(2){animation-delay:.15s}.stage.playing .beat i:nth-child(3){animation-delay:.3s}.stage.playing .beat i:nth-child(4){animation-delay:.1s}.stage.playing .beat i:nth-child(5){animation-delay:.25s}@keyframes beat{to{height:16px}}.stage.stopped,.stage.waiting{background:var(--peach)}.stage.cue{background:var(--lavender)}
.start{width:100%;min-height:82px;padding:18px;border:1px solid #b6d6c8;border-radius:20px;background:#c4e5d5;color:#284f40;font-size:1.45rem;font-weight:800;margin-top:14px;transition:background .15s,transform .15s}.start:hover{background:#b6ddca}.start.stop{background:#f3c6bd;border-color:#e6b4ab;color:#6b3835}.start.stop:hover{background:#efb8ad}.start:active{transform:scale(.99)}.action-row{display:flex;justify-content:flex-end;align-items:center;flex-wrap:wrap;gap:8px;margin:12px 0 30px}.action-row p{flex:1 1 240px;font-size:.76rem;color:var(--muted);margin:0;line-height:1.6}
.settings{display:grid;grid-template-columns:.85fr 1.15fr;gap:28px;padding:24px;background:#fff;border:1px solid var(--line);border-radius:20px;margin-bottom:24px}fieldset{border:0;padding:0;margin:0;min-width:0}legend{font-size:.85rem;font-weight:750;margin-bottom:12px}.segment{display:flex;gap:4px;padding:4px;border-radius:12px;background:#f3f5f1}.segment label{flex:1;position:relative;cursor:pointer;min-width:0}.segment input{position:absolute;opacity:0;width:1px;height:1px}.segment span{display:block;padding:11px 6px;min-height:44px;text-align:center;border-radius:9px;font-size:.86rem;font-weight:650;line-height:1.5}.segment input:checked+span{background:#356957;color:#fff;font-weight:800;box-shadow:0 0 0 1px #356957}.segment input:not(:checked)+span{background:#f3f5f1;color:#53665b}.segment label:hover input:not(:checked)+span{background:#e5ece5}.three span{font-size:.78rem;padding:12px 3px}fieldset p{font-size:.75rem;color:var(--muted);line-height:1.7;margin:10px 0 0}.custom-gap{display:flex;align-items:center;flex-wrap:wrap;gap:7px;margin-top:12px;font-size:.76rem;color:var(--muted)}.custom-gap input[type=radio]{width:17px;height:17px;accent-color:#537c70}.custom-gap input[type=number]{width:68px;min-height:40px;padding:7px}
input[type=number],select{border:1px solid #cedbd2;background:#fcfdfb;color:var(--ink);border-radius:9px;font:inherit}details{border-bottom:1px solid var(--line);color:var(--ink);margin:0;padding:0 6px}summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:58px;padding:16px 0;font-size:.85rem;font-weight:650}summary::-webkit-details-marker{display:none}summary::after{content:'＋';color:#758b80;font-size:1.15rem;font-weight:400}details[open]>summary::after{content:'−'}details[open]{padding-bottom:20px}.tuning-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:8px}.tuning-grid label,.speech-speed label,.volume label{font-size:.8rem;font-weight:600;line-height:1.7}.tuning-grid input,.tuning-grid select,.speech-speed select{display:block;width:100%;min-height:46px;margin-top:7px;padding:10px}.tuning p,.speech-speed p,.rules{font-size:.76rem;color:var(--muted);line-height:1.8}.tuning-grid>p{grid-column:1/-1;margin:0}.disclosure-content{margin-top:8px}.speech-speed label{display:none}.volume{display:flex;align-items:center;gap:16px}.volume input{flex:1;min-width:50px;accent-color:#537c70}.volume output{font-size:.83rem;font-variant-numeric:tabular-nums;min-width:40px}.rules p{margin:8px 0 14px}#error{background:#fce7e3;color:#713b37;border:1px solid #e6b4ab;padding:15px;border-radius:12px;font-size:.85rem;line-height:1.7}
@media(max-width:600px){.app{padding:22px 18px 36px}header{margin-bottom:22px;gap:14px}h1{font-size:1.8rem}.small-title{font-size:.65rem;max-width:225px}.quiet{padding:10px 12px}.stage{min-height:264px;padding:52px 18px 22px;border-radius:23px}.stage h2{font-size:clamp(3.4rem,16vw,4.6rem)}.stage #detail{font-size:.82rem}.round{top:15px;right:16px}.start{min-height:80px;border-radius:17px}.action-row{margin-bottom:24px}.action-row p{flex-basis:100%;text-align:center;margin:0 0 3px}.action-row .quiet{flex:1}.settings{grid-template-columns:1fr;gap:22px;padding:20px;margin-bottom:16px}.settings fieldset+fieldset{padding-top:20px;border-top:1px solid #eef1ec}.segment span{font-size:.86rem}.custom-gap{font-size:.78rem}.tuning-grid{grid-template-columns:1fr}.volume{flex-wrap:wrap}.volume label{flex-basis:100%}.volume input{min-height:32px}summary{min-height:56px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}.stage,.start{transition:none}.stage.playing .beat i{animation:none;height:10px}}

.music-gauge{width:100%;max-width:560px;height:12px;margin-top:20px}.music-gauge-fill{width:100%;height:100%;background:#356957;border-radius:8px;transform:scaleX(0);transform-origin:left center}