:root{color-scheme:light dark;--paper:#fbf5e9;--ink:#5c4024;--muted:#7a6854;--line:rgba(92,64,36,.18);--sun:#ffe6a0;--card:rgba(255,255,255,.62)}
@media(prefers-color-scheme:dark){:root{--paper:#111316;--ink:#f4eee5;--muted:#b9aea0;--line:rgba(255,255,255,.16);--sun:#ffe29a;--card:rgba(255,255,255,.06)}}
*{box-sizing:border-box}html{font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",sans-serif;background:radial-gradient(circle at 50% -10%,var(--sun),transparent 34rem),linear-gradient(180deg,var(--paper),var(--paper));color:var(--ink)}body{margin:0;min-height:100vh;line-height:1.62}header,main,footer{width:min(760px,calc(100% - 32px));margin-inline:auto}header{padding:54px 0 22px;text-align:center}.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;color:inherit}.mark{width:44px;height:44px;border-radius:50%;background:linear-gradient(180deg,#ffe39a 0 50%,#405a78 50% 100%);box-shadow:inset 0 0 0 1px rgba(0,0,0,.1)}h1,h2,h3{line-height:1.2;letter-spacing:-.02em}h1{font-size:clamp(2rem,7vw,3.4rem);margin:20px 0 8px}h2{margin-top:2.2rem}p.lead{font-size:1.15rem;color:var(--muted);margin-top:0}nav{display:flex;justify-content:center;flex-wrap:wrap;gap:10px 18px;margin-top:22px}a{color:inherit;text-underline-offset:3px}.card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:clamp(22px,5vw,38px);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}.lang-note{border-left:3px solid var(--sun);padding-left:14px;color:var(--muted)}hr{border:0;border-top:1px solid var(--line);margin:42px 0}ul{padding-left:1.2rem}footer{color:var(--muted);text-align:center;padding:34px 0 50px;font-size:.92rem}.button{display:inline-block;padding:12px 18px;border-radius:999px;background:var(--ink);color:var(--paper);text-decoration:none;font-weight:600}.small{font-size:.92rem;color:var(--muted)}