:root{--bg:#f2f0e8;--fg:#1a1e16;--mut:#596052;--card:#fff;--ac:#2e7d32;--bd:#d6d3c6;--iv:#f1eee3;--ink:#23271f}
@media(prefers-color-scheme:dark){:root{--bg:#0f120d;--fg:#ecebe2;--mut:#a3aa9a;--card:#181c14;--ac:#7bc67e;--bd:#2d3328}}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.7 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;padding:env(safe-area-inset-top,0) 0 env(safe-area-inset-bottom,0)}
a{color:var(--ac)}header,main,footer{max-width:940px;margin:0 auto;padding-left:16px;padding-right:16px}
header{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:6px 16px;padding-top:10px;padding-bottom:4px}
.logo{font-weight:800;font-size:1.2rem;color:var(--fg);text-decoration:none}nav a{margin-right:16px;color:var(--mut);text-decoration:none;font-size:.95rem}nav a:hover{color:var(--fg);text-decoration:underline}
h1{font-size:clamp(1.5rem,4.5vw,2.2rem);line-height:1.15;margin:.3em 0 .2em}h2{font-size:1.4rem;line-height:1.25;margin:2em 0 .4em}main p,main li{max-width:68ch}
.lead{font-size:1.08rem;color:var(--mut);margin:.2em 0 .8em}.crumb{font-size:.85rem;color:var(--mut);margin:6px 0 0}.crumb a{color:var(--mut)}
.q{display:flex;gap:8px;overflow-x:auto;padding:4px 0 8px}.q button{flex:none;font:inherit;font-weight:600;padding:8px 16px;border-radius:99px;border:1px solid var(--bd);background:var(--card);color:var(--fg);cursor:pointer}
[aria-pressed=true]{background:#2e7d32!important;color:#fff!important;border-color:#2e7d32!important}
#clock{display:flex;flex-direction:column;gap:10px;height:min(72vh,640px);min-height:430px}
.pad{position:relative;overflow:hidden;flex:1;border:0;border-radius:20px;background-color:var(--ink);color:var(--iv);display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;font:inherit;touch-action:manipulation;user-select:none;-webkit-tap-highlight-color:transparent;background-image:conic-gradient(rgba(255,255,255,.05) 25%,transparent 0 50%,rgba(255,255,255,.05) 0 75%,transparent 0);background-size:64px 64px}
.p0{background-color:var(--iv);color:var(--ink);background-image:conic-gradient(rgba(0,0,0,.06) 25%,transparent 0 50%,rgba(0,0,0,.06) 0 75%,transparent 0)}
.pad::after{content:"";position:absolute;left:0;bottom:0;height:8px;width:var(--w,100%);background:currentColor;opacity:.3}
.pad.on{background-color:#2e7d32;color:#fff;box-shadow:0 0 0 4px rgba(46,125,50,.35)}.pad.lo.on{background-color:#b3261e;box-shadow:0 0 0 4px rgba(179,38,30,.35)}.pad.out{background-color:#7a1212;color:#fff}
.tm{font:700 clamp(3.2rem,17vw,8rem)/1 ui-monospace,"SF Mono",Menlo,Consolas,monospace;font-variant-numeric:tabular-nums}.nm{font-size:.9rem;font-weight:600;opacity:.8;letter-spacing:.06em}.mv{font-size:.85rem;opacity:.75}
.face .p1{transform:rotate(180deg)}.bar{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
button:focus-visible,input:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid #e0a82e;outline-offset:2px}
.bar button,dialog button{font:inherit;padding:10px 16px;border-radius:12px;border:1px solid var(--bd);background:var(--card);color:var(--fg);cursor:pointer}.bar button{min-width:92px}
#hint{text-align:center;color:var(--mut);font-size:.9rem;min-height:1.6em;margin:6px 0 0}
dialog{border:1px solid var(--bd);border-radius:18px;background:var(--card);color:var(--fg);max-width:460px;width:92%}dialog::backdrop{background:rgba(0,0,0,.55)}
dialog h2{margin:0 0 6px}dialog h3{font-size:.85rem;margin:12px 0 4px;color:var(--mut)}dialog label{display:block;margin:10px 0 4px}.chips{display:flex;flex-wrap:wrap;gap:6px}.chips button{padding:6px 12px}
dialog input[type=number]{width:100%;padding:8px;font:inherit;border-radius:8px;border:1px solid var(--bd);background:var(--bg);color:var(--fg)}.row{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.mt{margin-top:16px}.go{background:#2e7d32!important;color:#fff!important;border-color:#2e7d32!important}
table{border-collapse:collapse;width:100%;font-size:.95rem;display:block;overflow-x:auto}th,td{border-bottom:1px solid var(--bd);padding:8px 10px;text-align:left;vertical-align:top}th{background:var(--card)}
.guides{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px;padding:0;list-style:none}.guides li{background:var(--card);border:1px solid var(--bd);border-radius:14px;padding:12px 16px}.guides a{font-weight:700}
details{border-bottom:1px solid var(--bd);padding:10px 0}summary{cursor:pointer;font-weight:600}
footer{margin-top:44px;padding-top:20px;padding-bottom:28px;border-top:1px solid var(--bd);color:var(--mut);font-size:.9rem}footer a{margin-right:14px}
@media(min-width:780px){#clock{flex-direction:row;height:min(66vh,560px)}.face .p1{transform:none}.p0{order:1}.bar{order:2;flex-direction:column;justify-content:center}.p1{order:3}}
@media(max-width:600px){#clock{height:calc(100svh - 230px)}}
@media(prefers-reduced-motion:reduce){*{transition:none!important}}