:root{--brand:#2F4A8A;--ink:#14212B;--muted:#4F5F6B;--bg:#F5F6FA;--card:#fff;--line:#D6E1E8;--accent:#1B2A4A;--amber:#B45309;--red:#C0262D;--green:#1E7B3A}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
html.fs-on,html.fs-on body{overflow:hidden}
body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system, BlinkMacSystemFont, "PingFang SC", "Noto Sans SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;line-height:1.7;font-size:16px}
.wrap{max-width:760px;margin:0 auto;padding:0 16px}
a{color:var(--brand)}
.skip{position:absolute;left:-999px;top:0}.skip:focus{left:8px;background:#fff;padding:8px;z-index:99}
.offscreen{position:fixed;left:-999px;top:0;opacity:0}
header.top{background:#fff;border-bottom:1px solid var(--line)}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:0 8px;min-height:52px;flex-wrap:wrap}
.logo{font-weight:700;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:8px;min-height:44px}
.logo .dot{width:14px;height:14px;border-radius:50%;background:var(--brand)}
nav.main{display:flex;gap:2px;flex-wrap:wrap}
nav.main a{color:var(--muted);text-decoration:none;padding:10px 7px;min-height:44px;min-width:44px;justify-content:center;display:inline-flex;align-items:center;font-size:14px}
nav.main a[aria-current]{color:var(--brand);font-weight:700}
h1{font-size:26px;line-height:1.3;margin:14px 0 6px}
.answer{margin:0 0 10px;color:var(--muted);font-size:15px;line-height:1.6}
.crumb{font-size:14px;color:var(--muted);margin-top:8px}.crumb a{display:inline-flex;align-items:center;justify-content:center;min-height:44px;min-width:44px}
.tool{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:12px;margin:0 0 20px;font-variant-numeric:tabular-nums}
button,input,select{font-family:inherit;color:var(--ink)}
.disp{font-size:clamp(56px,20vw,96px);font-weight:700;text-align:center;line-height:1.1;margin:2px 0 8px;font-variant-numeric:tabular-nums;white-space:nowrap}
.disp[data-long="1"]{font-size:clamp(40px,13vw,72px)}
.disp.sw{font-size:clamp(44px,14vw,84px)}
.disp.sw .cs{font-size:.6em}
.disp[data-color=amber]{color:var(--amber)}.disp[data-color=red]{color:var(--red)}
.ctl{display:flex;gap:8px}
.start{flex:1 1 40%;height:56px;border-radius:14px;border:0;background:var(--brand);color:#fff;font-size:20px;font-weight:700;letter-spacing:2px}
.tool[data-state=running] .start{background:var(--accent)}
.btn{flex:1 1 20%;min-width:64px;height:56px;border-radius:14px;border:1px solid var(--line);background:var(--bg);font-size:16px}
.btn:disabled,.row button:disabled{opacity:.45}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:8px 0}
.row button,.tbtn,.row a.lnk{min-height:44px;padding:0 14px;border-radius:10px;border:1px solid var(--line);background:var(--bg);font-size:15px;display:inline-flex;align-items:center}
.row a.lnk{text-decoration:none;color:var(--brand)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.chip{min-width:56px;height:44px;padding:0 12px;border-radius:22px;border:1px solid var(--line);background:#fff;font-size:15px;display:inline-flex;align-items:center;justify-content:center;text-decoration:none;color:var(--ink)}
.hms{display:flex;gap:8px;margin:10px 0 0}
.fld{display:flex;flex-direction:column;font-size:13px;color:var(--muted);gap:2px;flex:1;min-width:0}
.fld input,.fld select{height:44px;border:1px solid var(--line);border-radius:10px;background:#fff;font-size:16px;padding:0 8px;min-width:0;width:100%}
.chk{display:inline-flex;align-items:center;gap:6px;min-height:44px;margin-right:12px;font-size:15px}
.chk input{width:20px;height:20px;accent-color:var(--brand)}
.alarm-bar{display:flex;align-items:center;justify-content:space-between;gap:8px;background:#FDECEA;border:1px solid var(--red);border-radius:10px;padding:6px 10px;margin:8px 0;font-weight:700;color:var(--red)}
.alarm-bar button{min-height:44px;padding:0 14px;border-radius:10px;border:1px solid var(--red);background:#fff;color:var(--red);font-size:15px}
.tabs{display:flex;gap:8px;margin-bottom:8px}
.tabs button{flex:1;height:44px;border-radius:10px;border:1px solid var(--line);background:var(--bg);font-size:16px}
.tabs button[aria-pressed=true]{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:700}
.stage-name{text-align:center;font-weight:700;font-size:18px;margin:2px 0 0;min-height:1.7em}
.srow{display:grid;grid-template-columns:40px 1fr 52px 52px 40px;gap:4px;margin:6px 0;align-items:center}
.srow input{height:44px;border:1px solid var(--line);border-radius:10px;padding:0 6px;font-size:16px;min-width:0;width:100%;background:#fff}
.srow .snum{text-align:center;padding:0 2px}
.srow button,.evrow .del{width:40px;height:44px;border-radius:10px;border:1px solid var(--line);background:var(--bg);font-size:16px}
.srow.cur .idx{background:var(--brand);color:#fff;border-color:var(--brand)}
.muted{color:var(--muted)}
.note{font-size:14px;color:var(--muted);margin:6px 0 0;line-height:1.5}
.free{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-bottom:8px}
.clock{min-height:132px;border-radius:14px;border:2px solid var(--line);background:var(--bg);display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:18px}
.clock .ft{font-size:clamp(36px,11vw,64px);font-weight:700;line-height:1.1;font-variant-numeric:tabular-nums}
.clock.on{border-color:var(--brand);background:#E6F3F8}
.clock.out{border-color:var(--red);color:var(--red)}
.dread{text-align:center;padding:8px 0}
.dmain{font-size:clamp(24px,7vw,34px);font-weight:700;line-height:1.3;margin:0}
.dsub{font-size:clamp(20px,6vw,28px);margin:2px 0 0}
.evrow{display:flex;gap:6px;margin:6px 0;list-style:none}
.evt{flex:1;min-height:44px;text-align:left;border:1px solid var(--line);border-radius:10px;background:var(--bg);padding:4px 10px;font-size:15px;display:flex;justify-content:space-between;gap:8px;align-items:center}
.evr{color:var(--brand);font-weight:700;white-space:nowrap}
ul.evs,ul.solves{padding:0;margin:8px 0}
.scr{font-size:clamp(17px,5vw,22px);font-weight:700;text-align:center;letter-spacing:1px;margin:2px 0 8px;line-height:1.5;min-height:3em}
.cube-area{touch-action:none;user-select:none;-webkit-user-select:none;-webkit-touch-callout:none;border-radius:14px;background:var(--bg);border:2px solid var(--line);padding:16px 8px;text-align:center;cursor:pointer}
.cube-area .disp{margin:0}
.cube-area[data-s=wait] .disp{color:var(--red)}.cube-area[data-s=ready] .disp{color:var(--green)}
.cube-area[data-s=insp] .disp{color:var(--amber)}
.hint{margin:0;font-size:14px;color:var(--muted)}
.stats{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;margin:10px 0;text-align:center}
.stats div{background:var(--bg);border-radius:10px;padding:4px 2px;font-size:12px;color:var(--muted)}
.stats b{display:block;font-size:16px;color:var(--ink)}
ul.solves{max-height:300px;overflow:auto;list-style:none}
.srow2{display:flex;align-items:center;gap:6px;min-height:44px;border-bottom:1px solid var(--line)}
.srow2 .sn{width:44px;color:var(--muted)}.srow2 .sv{flex:1;font-weight:700}
.pen{min-width:44px;height:40px;border-radius:8px;border:1px solid var(--line);background:#fff;font-size:14px;padding:0 6px}
.pen.on{background:var(--brand);color:#fff;border-color:var(--brand)}
.laps{max-height:320px;overflow:auto;margin-top:10px}
.laps table{width:100%;border-collapse:collapse;text-align:center}
.laps th,.laps td{padding:6px 4px;border-bottom:1px solid var(--line)}
.laps th{position:sticky;top:0;background:#fff;color:var(--muted);font-size:14px;font-weight:400}
.laps tr.fast td{color:var(--green);font-weight:700}.laps tr.slow td{color:var(--red);font-weight:700}
.content h2,.faq h2,.related h2,.prose h2{font-size:20px;margin:26px 0 8px;line-height:1.4}
.content ol,.content ul{padding-left:22px;margin:8px 0}
.qa h3{font-size:17px;margin:16px 0 4px}.qa p{margin:0}
.cards{list-style:none;padding:0;margin:0;display:grid;gap:8px}
.card{display:block;background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px 14px;text-decoration:none;color:var(--ink)}
.cn{display:block;font-weight:700;color:var(--brand)}.cd{display:block;color:var(--muted);font-size:14px}
footer{margin-top:36px;border-top:1px solid var(--line);background:#fff;font-size:14px;color:var(--muted)}
footer .wrap{display:flex;flex-wrap:wrap;gap:4px 14px;align-items:center;padding-top:8px;padding-bottom:16px}
footer a{color:var(--muted);display:inline-flex;align-items:center;justify-content:center;min-height:44px;min-width:44px}
.flash{position:fixed;inset:0;background:var(--red);opacity:0;pointer-events:none;z-index:60}
.flash.go{animation:fl .12s ease-out}
.flash.alarm{animation:al 1s steps(1) infinite}
@keyframes fl{from{opacity:.55}to{opacity:0}}
@keyframes al{0%{opacity:.6;background:#D62828}50%{opacity:.6;background:#fff}}
.tool.fs{position:fixed;inset:0;z-index:40;margin:0;border:0;border-radius:0;padding:16px;display:flex;flex-direction:column;justify-content:center;overflow:auto}
.tool.fs .opt{display:none}
.tool.fs .disp{font-size:min(32vw,58vh)}
.tool.fs .disp[data-long="1"]{font-size:min(21vw,40vh)}
.tool.fs .disp.sw{font-size:min(30vw,58vh)}.tool.fs .disp.sw .cs{font-size:.38em}
.tool.fs .disp.sw[data-long="1"]{font-size:min(20vw,40vh)}
@media (orientation:portrait){.tool.fs .disp.sw{font-size:min(30vw,58vh,calc((100vw - 32px) / 3.35))}.tool.fs .disp.sw[data-long="1"]{font-size:min(20vw,40vh,calc((100vw - 32px) / 4.9))}}
.tool.fs .stage-name{font-size:min(6vw,8vh)}
.tool.fs .free{flex:1}
.tool.fs .clock .ft{font-size:min(15vw,42vh)}
.tool.fs .clock{font-size:min(5vw,6vh)}
.tool.fs .cube-area{flex:1;display:flex;flex-direction:column;justify-content:center}
.tool.fs .scr{font-size:min(4vw,5vh)}
@media (orientation:portrait){.tool.fs .free{grid-template-columns:1fr}.tool.fs .clock .ft{font-size:min(26vw,20vh)}}
@media (min-width:700px){h1{font-size:32px}.tool{padding:18px}nav.main a{padding:10px 10px;font-size:15px}.cards{grid-template-columns:1fr 1fr}.hms{max-width:360px}}
@media (prefers-reduced-motion:reduce){.flash.go,.flash.alarm{animation:none;opacity:0}}

/* ---- clockzh ---- */
.clocktool{--fg:#F2F4F8;--sub:#AAB4C8;background:#11161F;color:var(--fg);border-color:#11161F}
.clocktool[data-theme=light]{--fg:#14212B;--sub:#4F5F6B;background:#fff;border-color:var(--line)}
.clocktool[data-theme=color]{--fg:#fff;--sub:#DDE6FF;background:linear-gradient(135deg,#2F4A8A,#6B3FA0);border-color:#2F4A8A}
.clocktool[data-theme=night]{--fg:#FF4D4D;--sub:#B33A3A;background:#000;border-color:#000}
.clocktool[data-font=mono] .dig{font-family:ui-monospace,"SF Mono",Menlo,Consolas,monospace}
.clk{text-align:center;padding:6px 0 2px;transition:transform .6s}
.dig{display:flex;align-items:baseline;justify-content:center;gap:.08em;font-weight:700;line-height:1;white-space:nowrap;font-variant-numeric:tabular-nums}
.hmv{font-size:clamp(64px,24vw,150px)}
.secv{font-size:clamp(24px,8vw,52px);color:var(--sub);min-width:1.3em;text-align:left}
.ap{font-size:clamp(16px,5vw,28px);color:var(--sub);font-weight:700}
.ap:empty{display:none}
.ana{width:min(70vw,260px);height:auto;display:block;margin:0 auto}
.ana .face{fill:none;stroke:var(--sub);stroke-width:2}.ana .tk{stroke:var(--sub);stroke-width:1.5}.ana .tk5{stroke:var(--fg);stroke-width:3}
.ana .hh{stroke:var(--fg);stroke-width:7;stroke-linecap:round}.ana .hm{stroke:var(--fg);stroke-width:4.5;stroke-linecap:round}
.ana .hs{stroke:#E5484D;stroke-width:2;stroke-linecap:round}.ana .pin{fill:#E5484D}
.date{margin:6px 0 0;text-align:center;font-size:clamp(16px,4.6vw,24px);color:var(--sub)}
.acc{margin:4px 0 0;text-align:center;font-size:13px;color:var(--sub)}
.ctrl .btn{flex:1 1 30%;height:48px;font-size:14px;color:var(--ink);white-space:nowrap;padding:0 6px}
.ctrl .btn.big{font-weight:700}
.ctrl .btn[aria-pressed=true]{background:var(--brand);color:#fff;border-color:var(--brand)}
.setp{background:var(--bg);color:var(--ink);border-radius:12px;padding:10px;margin-top:6px;display:grid;grid-template-columns:1fr 1fr;gap:8px}
.setp .chks,.setp .note{grid-column:1/-1}
.chks{display:flex;flex-wrap:wrap}
.tool .note{color:inherit;opacity:.85}
.tool.fs .ctrl{transition:opacity .3s;position:relative;z-index:2}
.tool.fs.idle .ctrl,.tool.fs.idle .acc{opacity:0}
.tool.fs.idle{cursor:none}
.tool.fs .hmv{font-size:min(25vw,50vh)}.tool.fs .secv{font-size:min(8vw,16vh)}.tool.fs .ap{font-size:min(4vw,8vh)}
.tool.fs .ana{width:min(80vw,72vh,calc(100vh - 160px))}
.tool.fs .date{font-size:min(5vw,6vh)}
.tool.fs .setp{display:none}
/* flip */
.fliptool{background:#1B1D22;color:#E8EAEE;border-color:#1B1D22;--cb:#2A2D33;--cf:#F4F5F7;--cl:rgba(0,0,0,.45)}
.fliptool[data-card=white]{background:#E7E9EE;color:#1E2026;--cb:#FAFAFB;--cf:#1E2026;--cl:rgba(0,0,0,.12)}
.fliptool[data-card=brown]{background:#2B1E16;color:#F3E4D3;--cb:#6B4A33;--cf:#FFF3E4;--cl:rgba(0,0,0,.35)}
.flip{display:flex;align-items:center;justify-content:center;gap:clamp(6px,2vw,16px);padding:8px 0;font-variant-numeric:tabular-nums}
.flip .ap{align-self:flex-start;color:inherit;opacity:.7}
.fc{position:relative;width:clamp(120px,38vw,220px);height:clamp(96px,30vw,176px);perspective:600px;font-weight:700;font-size:clamp(72px,24vw,140px);color:var(--cf)}
.fsec .fc{width:clamp(56px,16vw,110px);height:clamp(48px,13vw,88px);font-size:clamp(34px,10vw,70px)}
.fsec[hidden]{display:none}
.fc span{position:absolute;left:0;right:0;height:50%;overflow:hidden;background:var(--cb);display:flex;justify-content:center;line-height:0;backface-visibility:hidden}
.fc .up,.fc .f1{top:0;border-radius:10px 10px 0 0;align-items:flex-end;border-bottom:1px solid var(--cl)}
.fc .dn,.fc .f2{bottom:0;border-radius:0 0 10px 10px;align-items:flex-start}
.fc .f1{transform-origin:50% 100%;z-index:2}.fc .f2{transform-origin:50% 0;z-index:2;transform:rotateX(90deg)}
.fc.go .f1{animation:f1 .3s ease-in forwards}.fc.go .f2{animation:f2 .3s .3s ease-out forwards}
.fc.fade .f1,.fc.fade .f2{display:none}.fc.fade{animation:fd .4s}
@keyframes f1{to{transform:rotateX(-90deg)}}@keyframes f2{from{transform:rotateX(90deg)}to{transform:rotateX(0)}}@keyframes fd{from{opacity:.3}to{opacity:1}}
.fliptool .date{color:inherit;opacity:.75}
.tool.fs .flip{flex:1}
.tool.fs .fc{width:min(40vw,60vh);height:min(32vw,48vh);font-size:min(26vw,38vh)}
.tool.fs .fsec .fc{width:min(15vw,22vh);height:min(12vw,18vh);font-size:min(9vw,13vh)}
@media (orientation:portrait){.tool.fs .flip{flex-wrap:wrap}.tool.fs .fc{width:min(42vw,40vh);height:min(34vw,32vh);font-size:min(28vw,26vh)}}
/* world */
.sugg{list-style:none;padding:0;margin:4px 0 0;display:flex;flex-wrap:wrap;gap:6px}
.sug{min-height:44px;padding:0 12px;border-radius:10px;border:1px solid var(--line);background:var(--bg);font-size:15px}
.wl{list-style:none;padding:0;margin:8px 0 0;display:grid;gap:8px}
.wc{border:1px solid var(--line);border-radius:12px;padding:8px 10px;background:var(--bg);display:grid;grid-template-columns:1fr auto;gap:0 8px}
.wtop{grid-column:1/-1;display:flex;justify-content:space-between;font-weight:700}
.wt{font-size:clamp(30px,9vw,40px);font-weight:700;line-height:1.2;font-variant-numeric:tabular-nums}
.wm,.wr{grid-column:1;font-size:14px;color:var(--muted)}
.wctl{grid-column:2;grid-row:2/5;display:flex;gap:4px;align-items:center}
.mv{width:44px;height:44px;border-radius:10px;border:1px solid var(--line);background:#fff;font-size:18px}
.mv:disabled{opacity:.35}
.tbl{overflow-x:auto}.tbl table,.strip table{width:100%;border-collapse:collapse;font-size:14px}
.tbl th,.tbl td,.strip th,.strip td{border-bottom:1px solid var(--line);padding:6px;text-align:left;vertical-align:top}
/* time difference */
.picks{display:grid;grid-template-columns:1fr 48px 1fr;gap:8px;align-items:end}
.picks .sugg{flex-direction:column}
.swap{height:44px;min-width:44px;padding:0}
.tdres{font-size:clamp(22px,6.4vw,30px);font-weight:700;text-align:center;margin:12px 0 4px;color:var(--brand)}
.tdt{margin:0;text-align:center;font-variant-numeric:tabular-nums}
.th{font-size:18px;margin:14px 0 0}
.cout{font-weight:700;margin:8px 0 0}
.strip{max-height:360px;overflow:auto;margin-top:8px}
.strip caption{text-align:left;font-size:13px;color:var(--muted);padding:4px 0}
.strip td.work{background:#E3E9F6}.strip tr.both td{background:#C9D6F0;font-weight:700}
@media (max-width:420px){.picks{grid-template-columns:1fr}.swap{justify-self:center}}
[hidden]{display:none!important}