:root{--main:#1b3a5c;--bg:#f4f6f9;--card:#fff;--ok:#1a7a3c;--err:#b3261e}
*{box-sizing:border-box}body{margin:0;font-family:system-ui,-apple-system,'Segoe UI',sans-serif;background:var(--bg);color:#1c2530}
nav{background:var(--main);color:#fff;display:flex;gap:14px;align-items:center;padding:10px 16px;flex-wrap:wrap}
nav a{color:#dbe7f3;text-decoration:none;padding:4px 6px}nav a:hover{color:#fff}
nav .brand{font-weight:700;margin-right:8px}nav .right{margin-left:auto}
main{max-width:860px;margin:0 auto;padding:16px}
.card{background:var(--card);border-radius:12px;padding:18px;box-shadow:0 1px 4px rgba(0,0,0,.08);margin-bottom:16px}
.narrow{max-width:420px;margin:8vh auto}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
label{display:block;margin:12px 0;font-weight:600}
input,textarea{width:100%;padding:10px;margin-top:6px;border:1px solid #c6cfd9;border-radius:8px;font:inherit}
button,.btn{background:var(--main);color:#fff;border:0;border-radius:8px;padding:10px 18px;font:inherit;cursor:pointer;text-decoration:none;display:inline-block;margin-top:8px}
button:hover,.btn:hover{opacity:.9}
.err{color:var(--err)}.ok{color:var(--ok)}.muted{color:#5a6774}
.list{list-style:none;padding:0}.list li{background:var(--card);margin:6px 0;padding:12px;border-radius:8px}
h1{font-size:1.5rem}