:root{
  --bg:#0f1117; --panel:#161922; --panel-2:#1c2030; --line:#262b3a;
  --txt:#e6e9f0; --muted:#8b91a4; --accent:#4f7cff; --accent-2:#2dd4bf;
  --green:#34d399; --red:#f87171; --yellow:#fbbf24;
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Segoe UI',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--txt);font-size:14px}
a{color:inherit;text-decoration:none}

/* ---------- layout ---------- */
.layout{display:flex;min-height:100vh}
.sidebar{width:240px;background:var(--panel);border-right:1px solid var(--line);
  display:flex;flex-direction:column;padding:22px 16px;position:sticky;top:0;height:100vh}
.brand{padding:0 8px 24px}
.brand-logo{font-size:24px;font-weight:800;letter-spacing:2px;
  background:linear-gradient(90deg,var(--accent),var(--accent-2));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.brand-logo.lg{font-size:34px}
.brand-sub{font-size:11px;color:var(--muted);letter-spacing:1px;text-transform:uppercase;margin-top:2px}
.sidebar nav{display:flex;flex-direction:column;gap:4px;flex:1}
.sidebar nav a{padding:11px 14px;border-radius:9px;color:var(--muted);display:flex;
  align-items:center;gap:11px;font-weight:500;transition:.15s}
.sidebar nav a span{width:18px;text-align:center;opacity:.8}
.sidebar nav a:hover{background:var(--panel-2);color:var(--txt)}
.sidebar nav a.active{background:linear-gradient(90deg,rgba(79,124,255,.18),transparent);
  color:#fff;box-shadow:inset 3px 0 0 var(--accent)}
.sidebar-foot{border-top:1px solid var(--line);padding-top:16px;display:flex;
  align-items:center;justify-content:space-between}
.user-chip{font-size:13px;font-weight:600}
.logout{font-size:12px;color:var(--muted)}
.logout:hover{color:var(--red)}

.content{flex:1;display:flex;flex-direction:column}
.topbar{display:flex;align-items:center;justify-content:space-between;
  padding:20px 32px;border-bottom:1px solid var(--line);background:var(--panel)}
.topbar h1{font-size:20px;font-weight:700}
.badge-ver{font-size:11px;color:var(--muted);border:1px solid var(--line);padding:3px 9px;border-radius:20px}
.container{padding:28px 32px;max-width:1100px}

/* ---------- cards ---------- */
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:22px}
.grid-2{display:grid;grid-template-columns:1fr 1.3fr;gap:18px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:20px 22px;margin-bottom:18px}
.card-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.card-head h2{font-size:15px;font-weight:600}
.card.stat{margin-bottom:0}
.stat-label{font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}
.stat-value{font-size:30px;font-weight:800;margin:8px 0 4px}
.stat-value.sm{font-size:15px;font-weight:600}
.stat-foot{font-size:12px;color:var(--muted)}
.stat-foot.green{color:var(--green)} .stat-foot.red{color:var(--red)}
.link{font-size:13px;color:var(--accent)}

/* ---------- tables ---------- */
.tbl{width:100%;border-collapse:collapse}
.tbl th{text-align:left;font-size:11px;text-transform:uppercase;letter-spacing:.5px;
  color:var(--muted);padding:10px 12px;border-bottom:1px solid var(--line)}
.tbl td{padding:12px;border-bottom:1px solid var(--line);font-size:13.5px;vertical-align:middle}
.tbl tr:last-child td{border-bottom:none}
.muted{color:var(--muted)} .empty{text-align:center;color:var(--muted);padding:26px}

/* ---------- tags ---------- */
.tag{display:inline-block;padding:3px 10px;border-radius:20px;font-size:11.5px;font-weight:600;
  border:none;cursor:default;text-transform:lowercase}
.tag.good{background:rgba(52,211,153,.15);color:var(--green)}
.tag.nochg{background:rgba(148,163,184,.15);color:#94a3b8}
.tag.badauth{background:rgba(248,113,113,.15);color:var(--red)}
.tag.dnserr,.tag.nohost{background:rgba(251,191,36,.15);color:var(--yellow)}

/* ---------- forms ---------- */
.form,form{display:flex;flex-direction:column;gap:6px}
label{font-size:12.5px;color:var(--muted);margin-top:8px}
input{background:var(--panel-2);border:1px solid var(--line);border-radius:9px;
  padding:11px 13px;color:var(--txt);font-size:14px;outline:none;transition:.15s}
input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(79,124,255,.15)}
button{cursor:pointer;font-family:inherit}
.btn-primary{background:linear-gradient(90deg,var(--accent),#6d8eff);color:#fff;border:none;
  padding:12px;border-radius:9px;font-weight:600;font-size:14px;margin-top:14px}
.btn-primary:hover{filter:brightness(1.08)}
.btn-secondary{background:var(--panel-2);color:var(--txt);border:1px solid var(--line);
  padding:11px;border-radius:9px;font-weight:600;margin-top:14px}
.btn-primary.full{width:100%}
.btn-del{background:transparent;border:1px solid var(--line);color:var(--red);
  padding:6px 12px;border-radius:7px;font-size:12px}
.btn-del:hover{background:rgba(248,113,113,.1)}
.sep{text-align:center;color:var(--muted);font-size:12px;margin:14px 0 4px}
.hint{font-size:12.5px;color:var(--muted);margin-top:14px;line-height:1.5}

/* ---------- alerts ---------- */
.alert{padding:12px 16px;border-radius:10px;margin-bottom:18px;font-size:13.5px}
.alert.ok{background:rgba(52,211,153,.12);border:1px solid rgba(52,211,153,.3);color:var(--green)}
.alert.err{background:rgba(248,113,113,.12);border:1px solid rgba(248,113,113,.3);color:var(--red)}

/* ---------- login ---------- */
.login-body{display:flex;align-items:center;justify-content:center;min-height:100vh;
  background:radial-gradient(1200px 600px at 50% -10%,rgba(79,124,255,.12),transparent),var(--bg)}
.login-card{width:380px;background:var(--panel);border:1px solid var(--line);
  border-radius:18px;padding:38px 34px;box-shadow:0 30px 80px rgba(0,0,0,.5)}
.login-brand{text-align:center;margin-bottom:24px}
.login-brand p{color:var(--muted);font-size:13px;margin-top:6px}
.login-foot{text-align:center;color:var(--muted);font-size:11.5px;margin-top:20px}
.arrow{color:var(--accent);font-weight:700;text-align:center;width:24px}

@media(max-width:880px){
  .cards{grid-template-columns:repeat(2,1fr)} .grid-2{grid-template-columns:1fr}
  .sidebar{width:70px} .brand-sub,.sidebar nav a span+*,.user-chip{display:none}
}