:root {
    --bg: #f5f6f8; --card: #fff; --text: #1d2330; --muted: #6b7280; --border: #e3e6eb;
    --primary: #2f6fde; --ok: #15803d; --ok-bg: #e7f6ec; --err: #c62828; --err-bg: #fdecec;
    --warn: #b45309; --warn-bg: #fdf3e2; --run: #1d4ed8; --run-bg: #e6eefc;
    --c-cpu: #2f6fde; --c-mem: #9333ea; --c-disk: #d97706;
}
@media (prefers-color-scheme: dark) {
    :root {
        --bg: #12151b; --card: #1b2029; --text: #e6e8ec; --muted: #9aa3b2; --border: #2b3240;
        --primary: #5b8ff0; --ok: #4ade80; --ok-bg: #12301f; --err: #f87171; --err-bg: #3a1818;
        --warn: #fbbf24; --warn-bg: #3a2c10; --run: #93b4fb; --run-bg: #18264a;
        --c-cpu: #5b8ff0; --c-mem: #c084fc; --c-disk: #fbbf24;
    }
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--text); font: 15px/1.55 "Noto Sans Bengali", "Hind Siliguri", system-ui, sans-serif; }
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.45rem; margin: 0 0 1rem; }
h2 { font-size: 1.1rem; margin: 1.6rem 0 .6rem; }
code, pre { font-family: ui-monospace, "SFMono-Regular", Menlo, monospace; font-size: .85em; }
.container { max-width: 1200px; margin: 0 auto; padding: 1.25rem 16px 3rem; }
.topbar { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; padding: .6rem 16px; background: var(--card); border-bottom: 1px solid var(--border); }
.topbar nav { display: flex; gap: .2rem; flex-wrap: wrap; flex: 1; }
.topbar nav a { padding: .35rem .7rem; border-radius: 6px; color: var(--text); }
.topbar nav a.active, .topbar nav a:hover { background: var(--bg); text-decoration: none; }
.brand { font-weight: 700; color: var(--text); }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 10px; padding: 1rem 1.2rem; margin-bottom: 1rem; }
.narrow { max-width: 620px; }
.auth-card { max-width: 400px; margin: 10vh auto; }
.row-between { display: flex; justify-content: space-between; align-items: center; gap: 1rem; flex-wrap: wrap; }
.actions { display: flex; gap: .4rem; flex-wrap: wrap; }
.inline { display: inline; }
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 1rem; }
.server-card { color: var(--text); display: block; }
.server-card:hover { border-color: var(--primary); text-decoration: none; }
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); gap: 1rem; }
.stat span { color: var(--muted); font-size: .85rem; display: block; }
.stat strong { font-size: 1.6rem; }
.metric { display: grid; grid-template-columns: 3rem 1fr 3.5rem; align-items: center; gap: .5rem; font-size: .85rem; margin: .25rem 0; }
progress { width: 100%; height: .55rem; accent-color: var(--primary); }
dd progress { width: 180px; vertical-align: middle; }
.table-wrap { overflow-x: auto; padding: 0; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .6rem .9rem; border-bottom: 1px solid var(--border); vertical-align: top; }
th { font-size: .8rem; color: var(--muted); font-weight: 600; }
tr:last-child td { border-bottom: 0; }
.badge { display: inline-block; padding: .05rem .5rem; border-radius: 999px; font-size: .78rem; font-weight: 600; }
.badge-ok { background: var(--ok-bg); color: var(--ok); }
.badge-err { background: var(--err-bg); color: var(--err); }
.badge-warn { background: var(--warn-bg); color: var(--warn); }
.badge-run { background: var(--run-bg); color: var(--run); }
.badge-muted { background: var(--bg); color: var(--muted); }
.ok { color: var(--ok); } .err { color: var(--err); } .muted { color: var(--muted); } .small { font-size: .82rem; }
.alert { padding: .7rem 1rem; border-radius: 8px; margin-bottom: 1rem; }
.alert ul { margin: 0; padding-left: 1.2rem; }
.alert-ok { background: var(--ok-bg); color: var(--ok); }
.alert-err { background: var(--err-bg); color: var(--err); }
.form label { display: block; margin-bottom: .8rem; font-size: .9rem; font-weight: 500; }
.form input:not([type=checkbox]), .form select, .form textarea {
    display: block; width: 100%; margin-top: .25rem; padding: .5rem .65rem; border: 1px solid var(--border);
    border-radius: 7px; background: var(--bg); color: var(--text); font: inherit;
}
.form textarea { font-family: ui-monospace, Menlo, monospace; font-size: .85rem; }
.form .check { display: flex; gap: .5rem; align-items: center; font-weight: 400; }
.cols { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 0 1rem; }
fieldset { border: 1px solid var(--border); border-radius: 8px; margin: 0 0 1rem; padding: .8rem 1rem .2rem; }
legend { font-weight: 600; padding: 0 .3rem; }
.hint { color: var(--muted); font-size: .85rem; margin: 0 0 .9rem; }
.otp { font-size: 1.6rem !important; letter-spacing: .5rem; text-align: center; }
.qr { display: block; margin: 1rem auto; background: #fff; padding: 8px; border-radius: 8px; }
.btn { display: inline-block; padding: .45rem .9rem; border: 1px solid var(--border); border-radius: 7px; background: var(--card); color: var(--text); font: inherit; cursor: pointer; }
.btn:hover { border-color: var(--primary); text-decoration: none; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
.btn-danger { color: var(--err); }
.btn-danger:hover { border-color: var(--err); }
.btn-ghost { background: transparent; }
.btn-sm { padding: .2rem .6rem; font-size: .85rem; }
.dl { display: grid; grid-template-columns: minmax(120px, 180px) 1fr; gap: .5rem 1rem; margin: 0; }
.dl dt { color: var(--muted); }
.dl dd { margin: 0; word-break: break-word; }
.log { white-space: pre-wrap; max-height: 480px; overflow: auto; }
.hash { word-break: break-all; font-size: .75rem; }
.checks { margin: 0; padding-left: 1rem; font-size: .82rem; }
.pager { display: flex; gap: 1rem; justify-content: center; margin: 1rem 0; }
.chart { width: 100%; height: 160px; display: block; }
.chart polyline { fill: none; stroke-width: 2; vector-effect: non-scaling-stroke; }
.chart .l-cpu { stroke: var(--c-cpu); } .chart .l-mem { stroke: var(--c-mem); } .chart .l-disk { stroke: var(--c-disk); }
.chart .grid-line { stroke: var(--border); stroke-dasharray: 4 4; vector-effect: non-scaling-stroke; }
.legend { display: flex; gap: 1rem; font-size: .82rem; margin-top: .5rem; }
.legend span::before { content: ""; display: inline-block; width: 12px; height: 3px; margin-right: .35rem; vertical-align: middle; }
.k-cpu::before { background: var(--c-cpu); } .k-mem::before { background: var(--c-mem); } .k-disk::before { background: var(--c-disk); }
[hidden] { display: none !important; }
@media (max-width: 640px) { .dl { grid-template-columns: 1fr; } .dl dt { margin-top: .4rem; } }