:root{--sea:#0b1e33;--deep:#12304f;--lamp:#eab308;--text:#e2e8f0;--line:#1f4468}
*{box-sizing:border-box}body{margin:0;background:#0b1e33;color:var(--text);font-family:"Avenir Next","Segoe UI",sans-serif;font-size:17px;line-height:1.7}
h1,h2,h3{font-family:"Avenir Next","Segoe UI",sans-serif;line-height:1.1;font-weight:600}
.dv-nav a{font-family:"SFMono-Regular",Menlo,monospace;}
.dv-cell b{font-family:"SFMono-Regular",Menlo,monospace;}
.dv-meta{font-family:"SFMono-Regular",Menlo,monospace;}
a{color:#fde047}a:focus-visible{outline:2px solid var(--lamp);outline-offset:3px;border-radius:14px}
.dv-skip{position:absolute;left:-9999px}.dv-skip:focus{left:1rem;top:1rem;background:#fff;color:#111;padding:.5rem}
.dv-top{max-width:1000px;margin:1rem auto 0;padding:.9rem 1.5rem;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:.8rem;background:var(--deep);border-radius:24px;box-shadow:0 12px 30px rgba(0,0,0,.4)}
.dv-brand{color:var(--text);text-decoration:none;font-size:1.3rem;font-weight:700}
.dv-nav{display:flex;flex-wrap:wrap;gap:.2rem 1rem}.dv-nav a{color:var(--text);font-size:.85rem}.dv-nav a[aria-current]{color:var(--lamp)}.dv-alt{color:#94a3b8;font-size:.7rem}
.dv-main{max-width:1000px;margin:0 auto;padding:2.6rem 1.4rem 3rem}
.dv-tag{font-size:.85rem;color:#94a3b8;margin:0}.dv-main h1{font-size:clamp(2.5rem,6.5vw,4.4rem);margin:.4rem 0 1rem}
.dv-en{color:#cbd5e1;font-size:.97rem;border-left:2px solid var(--lamp);padding-left:.9rem}
.dv-board{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;margin:2.4rem 0}
.dv-cell{background:var(--deep);border-radius:20px;padding:1.2rem 1rem;box-shadow:0 12px 30px rgba(0,0,0,.35)}.dv-cell b{color:var(--lamp);font-weight:400;font-size:.78rem}.dv-cell h2{font-size:1.25rem;margin:.2rem 0 .3rem}.dv-cell p{margin:0}
.dv-box{background:var(--deep);border-radius:20px;padding:1.2rem 1.4rem;margin-top:1.3rem}
.dv-hold[hidden]{display:none}
.dv-foot{max-width:1000px;margin:0 auto;padding:1.4rem 1.4rem 2.6rem;border-top:1px solid var(--line);font-size:.88rem}.dv-foot p{margin:.2rem 0}.dv-foot-links{display:flex;gap:1rem;flex-wrap:wrap;margin-top:.6rem}
.dv-doc section{margin-top:1.9rem}.dv-meta{font-size:.8rem;color:#94a3b8}
.dv-dl{display:grid;grid-template-columns:14rem 1fr;gap:.4rem 1rem;margin:1rem 0}.dv-dl dt{font-weight:700}.dv-dl dd{margin:0}
@media(max-width:820px){.dv-board{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.dv-board{grid-template-columns:1fr}.dv-dl{grid-template-columns:1fr}}