:root{color-scheme:light;--ink:#173149;--blue:#145f8c;--pale:#eaf5fc;--line:#c8dce9;--green:#176548}*{box-sizing:border-box}body{margin:0;background:#fff;color:var(--ink);font-family:system-ui,-apple-system,"Yu Gothic",Meiryo,sans-serif;line-height:1.8}a{color:var(--blue);text-underline-offset:4px}header{max-width:1080px;margin:auto;padding:22px 28px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.brand{font-weight:750;font-size:18px;text-decoration:none}header span{font-size:13px}main{max-width:1080px;padding:0 28px;margin:auto}.intro{padding:28px 0 20px}.crumb{font-size:13px;margin:0 0 20px}h1{font-size:clamp(30px,4vw,44px);line-height:1.45;margin:0 0 12px;font-weight:750;letter-spacing:.02em}.intro>p:last-child{margin:0;color:#4a6071}.workspace{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);gap:28px;background:var(--pale);border-radius:22px;padding:32px;margin-bottom:42px}h2{font-size:19px;margin:0 0 5px}.settings>p{font-size:13px;margin:4px 0 18px}.inputs{display:flex;gap:12px}.inputs label{display:flex;flex-direction:column;gap:5px;flex:1;min-width:0;font-size:14px;font-weight:650}.inputs input{width:100%;height:64px;border:1px solid #7797ad;border-radius:7px;background:white;color:var(--ink);font-size:28px;text-align:center;font-variant-numeric:tabular-nums}button{font:inherit;color:var(--ink);background:white;border:1px solid #7290a6;border-radius:7px;min-height:44px;padding:8px 16px;cursor:pointer;line-height:1.4}button:hover:enabled{background:#f5fbff}button:disabled,input:disabled{opacity:.65;cursor:default}button:focus-visible,input:focus-visible,a:focus-visible{outline:3px solid #144f73;outline-offset:4px}.presets{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:14px 0 25px}.presets button{padding:8px 4px}.sound{border-top:1px solid var(--line);padding-top:20px}.sound label{display:block;font-weight:650;margin-bottom:12px}.sound input{width:18px;height:18px;vertical-align:middle;accent-color:var(--blue)}.sound button{font-size:14px}.sound p,.hint{font-size:13px;line-height:1.7}.hint{margin-top:20px}#error{color:#9d2525;min-height:24px;margin:6px 0;font-weight:650}.timer{text-align:center;align-self:center}.clock{position:relative;width:min(100%,340px);aspect-ratio:1;margin:0 auto}.clock svg{display:block;width:100%;height:100%;transform:rotate(-90deg)}circle{fill:none;stroke-width:5}.track{stroke:#cbdfea}#dial{stroke:var(--blue);stroke-dasharray:565.49;stroke-linecap:round}.clock-content{position:absolute;inset:0;display:flex;flex-direction:column;justify-content:center;align-items:center}.remaining{font-size:14px;color:#4a6071}#time{font-size:clamp(32px,4.4vw,46px);line-height:1.6;font-weight:750;letter-spacing:.015em;font-variant-numeric:tabular-nums;white-space:nowrap}#status{font-size:18px;font-weight:750;margin:8px 0 20px;min-height:33px}.actions{display:flex;justify-content:center;flex-wrap:wrap;gap:9px}#start{background:var(--blue);color:#fff;border-color:var(--blue);font-weight:750;min-width:110px}#start:hover:enabled{background:#104d73}.timer[data-state=finished] #status{color:var(--green)}.timer[data-state=finished] #dial{stroke:var(--green)}.timer[data-state=uncertain] #status{color:#8a4205}#clock-note{font-size:14px;text-align:left;background:white;padding:14px;border-left:4px solid #8a4205;border-radius:4px}.guide{max-width:850px}.guide ol{padding-left:22px}.guide p{font-size:14px}.guide h2{font-size:21px}.notice{color:#9d2525}footer{display:flex;flex-wrap:wrap;gap:8px 24px;border-top:1px solid var(--line);margin-top:34px;padding:24px 0 28px;font-size:13px}footer p{flex-basis:100%;margin:3px 0;color:#4a6071}@media(max-width:700px){header{padding:18px 18px}header span{font-size:11px}main{padding:0 18px}.workspace{grid-template-columns:minmax(0,1fr);padding:22px 18px;gap:22px}.intro{padding-top:22px}.timer{grid-row:1}.clock{width:265px;max-width:100%}#time{font-size:36px}.actions{gap:7px}.actions button{padding:9px 12px}#start{min-width:95px}h1 br{display:none}.sound p{margin-bottom:0}.guide h2{font-size:19px}}@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto}}

.settings,.timer{min-width:0}