:root{--bg:#f4f5f7;--panel:#fff;--ink:#1b2230;--sub:#5d6778;--line:#dfe3ea;--chip:#eef1f5;--navy:#1f2a44;--accent:#e8710a;--ok:#1f8a4c;--okbg:#e3f3e9;--warn:#b07800;--warnbg:#fff4d6;--bad:#c73a3a;--badbg:#fde8e8;--blue:#3866b0;--bluebg:#e6eefb}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){--bg:#12151b;--panel:#1b2029;--ink:#e6e9ef;--sub:#9aa3b2;--line:#2e3542;--chip:#262c37;--okbg:#173823;--warnbg:#3a3014;--badbg:#3d1d1d;--bluebg:#1d2a44}}
:root[data-theme="dark"]{--bg:#12151b;--panel:#1b2029;--ink:#e6e9ef;--sub:#9aa3b2;--line:#2e3542;--chip:#262c37;--okbg:#173823;--warnbg:#3a3014;--badbg:#3d1d1d;--bluebg:#1d2a44}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Hiragino Sans","Noto Sans JP","Yu Gothic UI",Meiryo,sans-serif;font-size:15px;line-height:1.85}
.top{background:var(--navy);color:#fff;padding:10px 16px}
.top .t{display:flex;gap:10px;align-items:baseline;flex-wrap:wrap}.top b{font-size:16px}.top small{opacity:.7}
.top nav{display:flex;gap:4px;flex-wrap:wrap;margin-top:8px}
.top nav a{color:#cfd6e4;text-decoration:none;border:1px solid #3b4766;padding:5px 10px;border-radius:7px;font-size:13px}
.top nav a.on{background:var(--accent);border-color:var(--accent);color:#fff}
main{max-width:1080px;margin:0 auto;padding:16px}
@media (max-width:600px){main{padding:10px}}
.hero{background:linear-gradient(135deg,#1f2a44,#34466e);color:#fff;border-radius:16px;padding:26px 22px;margin-bottom:16px}
.hero h1{margin:0 0 8px;font-size:26px;line-height:1.4}.hero p{margin:6px 0;opacity:.92}
section.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin-bottom:16px}
@media (max-width:600px){section.card{padding:12px}}
h2{font-size:20px;margin:0 0 10px;line-height:1.45}
h2 .no{display:inline-block;background:var(--accent);color:#fff;border-radius:8px;padding:0 9px;margin-right:8px;font-size:15px}
h3{font-size:16px;margin:14px 0 6px}
.sub{color:var(--sub);font-size:13px}
.kata{display:grid;grid-template-columns:110px 1fr;gap:6px 12px;margin:8px 0}
.kata dt{font-weight:bold;color:var(--accent);font-size:13px;padding-top:2px}.kata dd{margin:0}
@media (max-width:600px){.kata{grid-template-columns:1fr}.kata dt{padding-top:6px}}
.box{border-radius:10px;padding:10px 14px;margin:10px 0}.ok{background:var(--okbg)}.warn{background:var(--warnbg)}.bad{background:var(--badbg)}.blue{background:var(--bluebg)}
.try{border:2px dashed var(--accent);border-radius:12px;padding:12px 14px;margin-top:12px}
.try>.h{font-weight:bold;color:var(--accent);margin-bottom:6px}
.g2{display:grid;grid-template-columns:1fr 1fr;gap:14px}.g3{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
@media (max-width:820px){.g2,.g3{grid-template-columns:1fr}}
.g2>*,.g3>*{min-width:0}
table{border-collapse:collapse;width:100%}th,td{border-bottom:1px solid var(--line);padding:7px;text-align:left;font-size:14px;vertical-align:top}th{color:var(--sub);font-weight:normal;font-size:12px}
.tw{overflow-x:auto}
.n{text-align:right;font-variant-numeric:tabular-nums}
label.f{display:block;font-size:12px;color:var(--sub);margin:6px 0 2px}
input,select,textarea{width:100%;padding:8px;border:1px solid var(--line);border-radius:7px;background:var(--panel);color:var(--ink);font-size:15px;font-family:inherit}
input[type=checkbox],input[type=radio]{width:auto}
.btn{display:inline-block;border:none;background:var(--accent);color:#fff;padding:8px 14px;border-radius:8px;font-size:14px;cursor:pointer;text-decoration:none;white-space:nowrap}
.btn.g{background:var(--chip);color:var(--ink);border:1px solid var(--line)}.btn.ok{background:var(--ok)}.btn.bad{background:var(--bad)}
.btn.rec{background:var(--bad);animation:pulse 1.2s infinite}@keyframes pulse{50%{opacity:.6}}
.row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}.sp{flex:1}
.chip{display:inline-block;padding:1px 9px;border-radius:999px;font-size:12px;background:var(--chip);border:1px solid var(--line);margin:1px 2px;white-space:nowrap}
.chip.ok{background:var(--okbg);color:var(--ok);border-color:transparent}.chip.bad{background:var(--badbg);color:var(--bad);border-color:transparent}.chip.warn{background:var(--warnbg);color:var(--warn);border-color:transparent}
.big{font-size:28px;font-weight:bold;line-height:1.2}
.toc{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:8px}
.toc a{display:block;border:1px solid var(--line);border-radius:10px;padding:8px 10px;text-decoration:none;color:var(--ink);background:var(--panel);font-size:14px}
.toc a b{color:var(--accent);margin-right:6px}
pre.code{background:#0f1420;color:#cde3ff;padding:12px;border-radius:8px;overflow-x:auto;font-size:12px;line-height:1.5}
svg text{fill:var(--ink)}
#toast{position:fixed;left:50%;bottom:18px;transform:translateX(-50%);background:#222;color:#fff;padding:10px 16px;border-radius:8px;opacity:0;transition:opacity .3s;pointer-events:none;z-index:30;max-width:92vw}#toast.on{opacity:1}
@media print{.top,.try,.btn{display:none!important}section.card{break-inside:avoid;border:none}body{background:#fff}}