:root{
    --bg:#f4f6fb; --card:#fff; --ink:#1e2436; --muted:#7a8296; --line:#e6e9f2;
    --primary:#3b5bfd; --primary-d:#2f49d6; --sidebar:#141a2e; --sidebar-ink:#aeb7d0;
    --ok:#16a34a; --okbg:#e7f7ed; --err:#dc2626; --errbg:#fdeaea; --warn:#d97706;
    --radius:14px; --shadow:0 2px 10px rgba(20,26,46,.06);
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:"Figtree",-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.5}
a{color:var(--primary);text-decoration:none}
small{font-size:.82em}
.muted{color:var(--muted)}
.small{font-size:.85rem}
code{background:#eef1f8;padding:1px 6px;border-radius:6px;font-size:.85em}

/* ---------- App shell ---------- */
body.app{display:flex;min-height:100vh}
.sidebar{width:240px;background:var(--sidebar);color:var(--sidebar-ink);display:flex;flex-direction:column;position:sticky;top:0;height:100vh;flex-shrink:0}
.brand{padding:22px 20px;color:#fff;font-weight:700;font-size:1.15rem;display:flex;align-items:center;gap:8px;border-bottom:1px solid rgba(255,255,255,.07)}
.brand small{color:var(--sidebar-ink);font-weight:500;font-size:.75rem}
.brand .logo,.auth-brand .logo{color:var(--primary);font-size:1.1em}
.sidebar nav{padding:14px 10px;flex:1}
.sidebar nav a{display:block;color:var(--sidebar-ink);padding:11px 14px;border-radius:10px;margin-bottom:4px;font-weight:500}
.sidebar nav a:hover{background:rgba(255,255,255,.06);color:#fff}
.sidebar nav a.active{background:var(--primary);color:#fff}
.sidebar-foot{padding:16px;border-top:1px solid rgba(255,255,255,.07)}
.who{color:#fff;font-weight:600;margin-bottom:10px;display:flex;flex-direction:column}
.who small{color:var(--sidebar-ink);font-weight:400}
.content{flex:1;padding:28px 34px;max-width:1200px;width:100%}

/* ---------- Auth ---------- */
body.auth{display:flex;align-items:center;justify-content:center;min-height:100vh;background:linear-gradient(135deg,#141a2e 0%,#263166 100%)}
.auth-wrap{width:100%;max-width:400px;padding:20px}
.auth-card{background:var(--card);border-radius:var(--radius);padding:34px 30px;box-shadow:0 20px 60px rgba(0,0,0,.25)}
.auth-brand{font-size:1.4rem;font-weight:800;margin-bottom:4px}
.auth-brand b{color:var(--primary)}

/* ---------- Headings / layout bits ---------- */
.page-head{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:22px;flex-wrap:wrap}
.page-head h1{margin:0;font-size:1.5rem;display:flex;align-items:center;gap:10px}
.back{display:inline-block;margin-bottom:4px;font-size:.85rem}
h3{margin:0 0 14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:20px;box-shadow:var(--shadow)}
.hidden{display:none}
.empty{background:var(--card);border:1px dashed var(--line);border-radius:var(--radius);padding:40px;text-align:center;color:var(--muted)}

/* ---------- Forms ---------- */
.form label{display:block;margin-bottom:14px;font-weight:600;font-size:.9rem}
.form input,.form select,.form textarea{width:100%;margin-top:6px;padding:10px 12px;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fbfcfe}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(59,91,253,.12)}
.form textarea{resize:vertical}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}
.grid-3{display:grid;grid-template-columns:1fr 1fr auto;gap:0 18px;align-items:end}
.form-actions{display:flex;align-items:flex-end;padding-bottom:14px}
.grid-2 .form-actions{grid-column:1/-1}

/* ---------- Buttons ---------- */
.btn{display:inline-block;padding:10px 18px;border-radius:10px;border:1px solid var(--line);background:#fff;font:inherit;font-weight:600;cursor:pointer;color:var(--ink)}
.btn:hover{background:#f7f8fc}
.btn-primary{background:var(--primary);border-color:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-d)}
.btn-block{width:100%;margin-top:6px}
.btn-ghost{background:transparent;border:1px solid var(--line);padding:7px 12px;border-radius:9px;font:inherit;font-weight:600;cursor:pointer;color:var(--muted)}
.btn-ghost:hover{color:var(--ink);background:#f3f5fb}
.btn-ghost.small{padding:5px 10px;font-size:.82rem}
.btn-ghost.danger{color:var(--err);border-color:#f3cccc}
.btn-ghost.danger:hover{background:var(--errbg)}
.btn-danger-ghost{background:transparent;border:1px solid #f0cccc;color:var(--err);padding:9px 16px;border-radius:10px;font:inherit;font-weight:600;cursor:pointer}
.btn-danger-ghost:hover{background:var(--errbg)}

/* ---------- Flash ---------- */
.flash{padding:12px 16px;border-radius:10px;margin-bottom:16px;font-weight:500}
.flash-success{background:var(--okbg);color:#12753a;border:1px solid #bce7cb}
.flash-error{background:var(--errbg);color:#a81f1f;border:1px solid #f1c7c7}

/* ---------- Server cards ---------- */
.grid-cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:16px}
.server-card{display:block;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);color:var(--ink);transition:.15s}
.server-card:hover{transform:translateY(-2px);box-shadow:0 8px 24px rgba(20,26,46,.1)}
.sc-top{display:flex;align-items:center;gap:8px;font-size:1.05rem;margin-bottom:6px}
.sc-host{font-family:monospace;color:var(--muted);margin-bottom:8px}
.sc-foot{margin-top:10px;border-top:1px solid var(--line);padding-top:8px}

/* status dots */
.dot{width:10px;height:10px;border-radius:50%;display:inline-block;background:#c4c9d6}
.dot-online{background:var(--ok);box-shadow:0 0 0 3px var(--okbg)}
.dot-offline{background:var(--err);box-shadow:0 0 0 3px var(--errbg)}
.dot-unknown{background:#c4c9d6}

/* ---------- Tabs ---------- */
.tabs{display:flex;gap:4px;border-bottom:1px solid var(--line);margin-bottom:22px;align-items:center}
.tabs a{padding:10px 16px;color:var(--muted);font-weight:600;border-bottom:2px solid transparent;margin-bottom:-1px}
.tabs a:hover{color:var(--ink)}
.tabs a.active{color:var(--primary);border-bottom-color:var(--primary)}
.tab-right{margin-left:auto}

/* ---------- Stats / meters ---------- */
.stat-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:14px;margin-bottom:20px}
.stat{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px;box-shadow:var(--shadow)}
.stat-k{display:block;color:var(--muted);font-size:.8rem;margin-bottom:4px}
.stat-v{font-weight:700}
.meter-card .big{font-size:2rem;font-weight:800}
.meter-card .big small{font-size:.9rem;color:var(--muted);font-weight:500}
.meter{height:12px;background:#eef1f8;border-radius:8px;overflow:hidden;margin:6px 0}
.meter-fill{height:100%;background:var(--primary);border-radius:8px}
.meter-fill.hot{background:var(--err)}

.quick-links{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;margin-top:6px}
.ql{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px;display:flex;flex-direction:column;gap:4px;box-shadow:var(--shadow)}
.ql:hover{border-color:var(--primary)}

/* ---------- Tables ---------- */
.table{width:100%;border-collapse:collapse}
.table th,.table td{text-align:left;padding:11px 10px;border-bottom:1px solid var(--line)}
.table th{color:var(--muted);font-size:.8rem;text-transform:uppercase;letter-spacing:.3px}
.table tr:last-child td{border-bottom:none}
.right{text-align:right}
.svc-actions{display:flex;gap:6px;justify-content:flex-end}
.svc-actions form{display:inline}

.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:.78rem;font-weight:700}
.badge-on{background:var(--okbg);color:#12753a}
.badge-off{background:var(--errbg);color:#a81f1f}

/* ---------- Responsive ---------- */
@media(max-width:860px){
    body.app{flex-direction:column}
    .sidebar{width:100%;height:auto;position:static;flex-direction:row;align-items:center;justify-content:space-between}
    .sidebar nav{display:flex;padding:8px}
    .sidebar-foot{border-top:none;display:flex;align-items:center;gap:10px}
    .who{margin-bottom:0}
    .content{padding:18px 16px}
    .grid-2,.grid-3{grid-template-columns:1fr}
}