/* 平成スポーツ、持てるか — 世界観：夜のガレージと後付けのブースト計 */
:root{--bg:#121418;--panel:#1b1e24;--line:#343943;--text:#eceef1;--sub:#a4abb6;--amber:#ff9a1f;--red:#e5352b}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font-family:"Zen Kaku Gothic New","Hiragino Sans",sans-serif;font-weight:500;font-size:16.5px;line-height:1.9}
.wrap{max-width:820px;margin:0 auto;padding:0 18px}
a{color:var(--amber)}
.top{border-bottom:3px solid var(--amber);background:#0d0e11}
.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:10px;padding-bottom:10px;flex-wrap:wrap}
.logo{display:flex;align-items:center;gap:9px;color:#fff;text-decoration:none;font-weight:700;font-size:19px}
.logo b{color:var(--amber);font-weight:900}
.logo svg{width:36px;height:36px}
.tag{font-family:"Share Tech Mono",monospace;color:var(--sub);font-size:13px}
.hero{padding:46px 0 26px}
.kicker{display:inline-block;margin:0;background:var(--red);color:#fff;font-weight:900;padding:0 12px;transform:skewX(-12deg)}
h1{font-weight:900;font-size:clamp(36px,8vw,62px);line-height:1.22;margin:16px 0 18px;letter-spacing:-.01em}
h1 em{font-style:normal;color:var(--amber)}
.lead{max-width:640px;margin:0}
.byline{font-size:13.5px;color:var(--sub);margin:12px 0 0}
.panel{background:var(--panel);border:1px solid var(--line);border-left:6px solid var(--amber);padding:6px 22px 22px;margin:0 0 24px}
.panel h2{font-size:21px;font-weight:900;margin:24px 0 12px;display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.panel h2 span{font-family:"Share Tech Mono",monospace;color:var(--amber);font-weight:400}
.panel h2 small{font-size:13px;color:var(--sub);font-weight:500}
.cars{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.cars input{position:absolute;opacity:0;width:1px;height:1px}
.cars span{display:block;border:2px solid var(--line);padding:9px 8px;text-align:center;font-family:"Share Tech Mono",monospace;font-size:24px;line-height:1.2;cursor:pointer;transform:skewX(-5deg);background:#14161a}
.cars small{display:block;font-family:"Zen Kaku Gothic New",sans-serif;font-size:12.5px;color:var(--sub)}
.cars span:hover{border-color:var(--amber)}
.cars input:checked + span{background:var(--amber);border-color:var(--amber);color:#14161a}
.cars input:checked + span small{color:#14161a}
.cars input:focus-visible + span{outline:3px solid #fff;outline-offset:2px}
.row{display:grid;gap:12px 16px;margin-top:12px}
.row.two{grid-template-columns:1fr 1fr}
.row label{font-size:14.5px;color:var(--sub);display:block}
input[type=number]{display:block;width:100%;margin-top:3px;background:#0d0e11;border:1px solid var(--line);color:var(--amber);font-family:"Share Tech Mono",monospace;font-size:22px;padding:7px 10px;border-radius:0}
input[type=number]:focus{outline:2px solid var(--amber);outline-offset:0}
.note{font-size:14px;color:var(--sub);line-height:1.75;margin:12px 0 0}
.result{border-left-color:var(--red)}
.meter{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:20px;align-items:center}
.meter svg{width:100%;height:auto}
#arc{transition:stroke-dasharray .25s ease-out}
.big p{margin:0 0 10px;color:var(--sub);font-size:14px;border-bottom:1px solid var(--line);padding-bottom:7px}
.big strong{display:block;color:#fff;font-family:"Share Tech Mono",monospace;font-weight:400;font-size:30px;line-height:1.2}
.say{font-size:18px;font-weight:700;margin:16px 0 6px}
.break h3{font-size:15px;color:var(--amber);margin:18px 0 4px}
dl{margin:0;display:grid;grid-template-columns:1fr auto}
dt,dd{margin:0;padding:6px 0;border-bottom:1px dotted var(--line)}
dd{font-family:"Share Tech Mono",monospace;font-size:18px;text-align:right}
.plain{font-size:25px;font-weight:900;margin:44px 0 10px;line-height:1.45}
.tbl{overflow-x:auto;margin:14px 0 8px}
table{border-collapse:collapse;width:100%;min-width:520px;font-size:15px;line-height:1.55}
th,td{border:1px solid var(--line);padding:9px 10px;text-align:left;vertical-align:top}
th{background:#262a32}
td:not(:first-child){font-family:"Share Tech Mono",monospace;font-size:16px}
.src{background:#0d0e11;border:1px solid var(--line);padding:14px 18px;font-size:14px;line-height:1.8;margin:26px 0 0}
.src ul{margin:6px 0 0;padding-left:18px}
.foot{border-top:1px solid var(--line);color:var(--sub);font-size:13.5px;padding:18px 0;margin-top:40px}
@media (max-width:620px){
  .row.two{grid-template-columns:1fr 1fr}
  .meter{grid-template-columns:1fr}
  .panel{padding:4px 14px 18px}
  .cars small{font-size:11px;white-space:nowrap}
  input[type=number]{font-size:19px}
}
@media (prefers-reduced-motion:reduce){#arc{transition:none}}