:root{font:16px system-ui;color:#edf8f5;background:#07161b;--panel:#10272d;--accent:#66d4c3}*{box-sizing:border-box}body{margin:0}header{height:68px;display:flex;align-items:center;gap:24px;padding:0 max(24px,5vw);border-bottom:1px solid #31515a;position:sticky;top:0;background:#07161bf2}.brand{color:white;text-decoration:none;letter-spacing:.12em}.brand b,.eyebrow{color:var(--accent)}nav{display:flex;gap:8px;flex:1}button{background:#17343c;color:white;border:1px solid #42636b;border-radius:9px;padding:10px 15px;cursor:pointer}button:hover,button:focus{border-color:var(--accent)}#environment{background:#8b5e00;color:white;text-align:center;font-weight:700;padding:6px;min-height:6px}main{max-width:1200px;margin:auto;padding:55px 28px}h1{font-size:clamp(2.4rem,6vw,5rem);max-width:850px;line-height:1}.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px;margin-top:35px}article,dialog{background:var(--panel);border:1px solid #31515a;border-radius:16px;padding:22px}article span{font-size:.72rem;text-transform:uppercase;color:var(--accent)}dialog{color:white;max-width:550px}dialog::backdrop{background:#000a}.close{float:right}li{margin:14px 0}@media(max-width:700px){header{gap:8px;padding:10px;height:auto;flex-wrap:wrap}nav{order:3;width:100%;overflow:auto}main{padding-top:35px}}