:root{--bg:#f4f7fb;--card:#fff;--ink:#182238;--muted:#697386;--brand:#3730a3;--line:#dfe5ee;--ok:#087f5b;--danger:#b42318}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Tahoma,Arial,sans-serif}
header{height:68px;background:#111827;color:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 5vw}
header a{color:#fff;text-decoration:none}.brand{font-size:21px;font-weight:700}nav{display:flex;gap:22px;align-items:center}nav form{margin:0}
main{max-width:1250px;margin:30px auto;padding:0 20px}footer{text-align:center;color:var(--muted);padding:30px}
h1{font-size:28px}h2{font-size:18px;margin-top:0}.panel,.login-card,.stat{background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:0 4px 18px #1725540a}
.panel{padding:20px;margin-bottom:22px;overflow:auto}.login-card{max-width:430px;margin:8vh auto;padding:32px}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin:22px 0}
.stat{padding:22px}.stat strong{display:block;font-size:32px}.stat span{color:var(--muted)}.stat.online strong{color:var(--ok)}.stat.warning strong{color:#b54708}
label{display:block;margin:16px 0 7px}input,textarea,select{width:100%;border:1px solid #cbd5e1;border-radius:8px;padding:11px;font:inherit;background:#fff}
button{background:var(--brand);color:#fff;border:0;border-radius:8px;padding:11px 18px;font:inherit;cursor:pointer;margin-top:12px}.link-button{background:none;margin:0;padding:0}.danger{background:var(--danger)}
table{width:100%;border-collapse:collapse}th,td{text-align:right;padding:12px;border-bottom:1px solid var(--line)}th{color:var(--muted);font-size:13px}
.badge{display:inline-block;padding:5px 10px;border-radius:99px;font-size:12px}.badge.ok{background:#d1fae5;color:#065f46}.badge.off{background:#fee2e2;color:#991b1b}
.title-row,.inline-form{display:flex;align-items:center;gap:15px}.title-row{justify-content:space-between}.inline-form input{max-width:380px}.inline-form button{margin:0}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}dl{display:grid;grid-template-columns:145px 1fr;gap:10px}dt{color:var(--muted)}dd{margin:0;word-break:break-all}
pre{direction:ltr;text-align:left;white-space:pre-wrap;max-height:460px;overflow:auto;background:#0f172a;color:#dbeafe;padding:15px;border-radius:9px}
.enrollment{background:#eef2ff;border:1px solid #c7d2fe;padding:15px;border-radius:9px;margin-bottom:14px}.enrollment strong{font-size:25px;margin:0 16px;letter-spacing:2px}
.alert,.error{padding:12px;border-radius:8px;margin-bottom:16px}.error{color:#b42318;background:#fee4e2}.check{display:flex;gap:8px}.check input{width:auto}
@media(max-width:760px){.stats,.grid{grid-template-columns:1fr}.inline-form{display:block}header{padding:0 18px}nav{gap:10px}}