:root{color-scheme:dark;--bg:#07141c;--ink:#eee8db;--muted:#acb6b8;--gold:#dcc18e;--line:#ffffff21;--serif:"Yu Mincho","Hiragino Mincho ProN",serif;--sans:"Hiragino Kaku Gothic ProN",Meiryo,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:2}a{color:inherit;text-underline-offset:.4em}button{font:inherit}a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--gold);outline-offset:6px}.shell{width:min(1120px,calc(100% - 48px));margin:auto}.brandbar{display:flex;align-items:center;justify-content:space-between;padding:26px 0;border-bottom:1px solid var(--line);gap:20px}.brand{display:flex;align-items:center;gap:14px;text-decoration:none;font-family:var(--serif);font-size:26px;letter-spacing:.2em}.brand img{width:46px;height:46px;object-fit:contain}.brandbar nav{display:flex;gap:28px;font-size:14px}.brandbar nav 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.title-phrase{display:inline-block;max-width:100%}@media(max-width:560px){h1{font-size:clamp(23px,7vw,28px);letter-spacing:0}}
@media(max-width:560px){.brandbar{gap:10px}.brand{white-space:nowrap;flex-shrink:0;font-size:20px;letter-spacing:.12em;gap:7px}.brand img{width:34px;height:34px}.brandbar nav{font-size:12px;white-space:nowrap;gap:0}}

/* 細い画面でも状況選択の短い見出しを一行で読めるようにする。 */
@media(max-width:360px){.situations h2{font-size:22px;letter-spacing:0}}