:root {
  --bg: #f5f6f8;
  --card: #ffffff;
  --text: #1c2330;
  --muted: #6b7484;
  --line: #e3e6eb;
  --accent: #2f6fdf;
  --accent-text: #ffffff;
  --up: #1f9d55;
  --warn: #c98000;
  --down: #d64545;
  --pending: #a5adba;
  --up-bg: #e7f6ed;
  --warn-bg: #fdf3e0;
  --down-bg: #fdeaea;
  --code-bg: #eef0f3;
  --radius: 10px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151b;
    --card: #1a1f27;
    --text: #e4e8ee;
    --muted: #8d96a5;
    --line: #2a313c;
    --accent: #5b8ef0;
    --up: #3ccf7c;
    --warn: #f0b23c;
    --down: #f06a6a;
    --pending: #5c6470;
    --up-bg: #15301f;
    --warn-bg: #352812;
    --down-bg: #3a1a1a;
    --code-bg: #232a34;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1 { font-size: 1.5rem; margin: 0 0 .75rem; display: flex; align-items: center; gap: .5rem; overflow-wrap: anywhere; }
h2 { font-size: 1.15rem; margin: 0; }
h3 { font-size: .8rem; margin: 0 0 .75rem; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
code { background: var(--code-bg); padding: .05rem .35rem; border-radius: 4px; font-size: .88em; overflow-wrap: anywhere; }
small, .small { font-size: .85rem; }
.muted { color: var(--muted); }
.ok { color: var(--up); }
.warn { color: var(--warn); }
.bad { color: var(--down); }
.nowrap { white-space: nowrap; }
[hidden] { display: none !important; }

/* ---- header ---- */
.top {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: .5rem 1rem;
  padding: .75rem 1.25rem; background: var(--card); border-bottom: 1px solid var(--line);
}
.brand { font-weight: 700; font-size: 1.1rem; color: var(--text); display: flex; align-items: center; gap: .5rem; }
.brand:hover { text-decoration: none; }
.brand small { font-weight: 400; color: var(--muted); font-size: .9rem; }
.logo { width: 18px; height: 18px; border-radius: 50%; border: 4px solid var(--accent); display: inline-block; }
nav { display: flex; align-items: center; flex-wrap: wrap; gap: .25rem; }
nav a, .linklike {
  padding: .35rem .7rem; border-radius: 6px; color: var(--muted); font: inherit;
  background: none; border: 0; cursor: pointer;
}
nav a:hover, .linklike:hover { background: var(--bg); color: var(--text); text-decoration: none; }
nav a.active { color: var(--text); background: var(--bg); font-weight: 600; }
nav form { margin: 0; }

main { max-width: 1280px; margin: 0 auto; padding: 1.25rem; }

/* ---- building blocks ---- */
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 1.1rem 1.25rem; margin-bottom: 1rem; min-width: 0;
}
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 0 1rem; }
.btn {
  display: inline-flex; align-items: center; gap: .3rem; padding: .45rem .9rem; border-radius: 7px;
  border: 1px solid var(--line); background: var(--card); color: var(--text); font: inherit; font-size: .92rem;
  cursor: pointer; white-space: nowrap;
}
.btn:hover { border-color: var(--muted); text-decoration: none; }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn.danger { color: var(--down); }
.btn.danger:hover { border-color: var(--down); }
.btn.active { border-color: var(--accent); color: var(--accent); }
.btn.wide { width: 100%; justify-content: center; }
.btn:disabled, .btn.disabled { opacity: .6; cursor: progress; pointer-events: none; }

.flash { padding: .7rem 1rem; border-radius: 8px; margin-bottom: 1rem; border: 1px solid transparent; }
.flash ul { margin: 0; padding-left: 1.2rem; }
.flash.ok { background: var(--up-bg); color: var(--text); border-color: var(--up); }
.flash.warn { background: var(--warn-bg); color: var(--text); border-color: var(--warn); }
.flash.error { background: var(--down-bg); color: var(--text); border-color: var(--down); }

.dot { width: 10px; height: 10px; border-radius: 50%; display: inline-block; flex: none; background: var(--pending); }
h1 .dot { width: 14px; height: 14px; }
.dot.up { background: var(--up); }
.dot.warn { background: var(--warn); }
.dot.down { background: var(--down); box-shadow: 0 0 0 3px var(--down-bg); }

.tag {
  display: inline-block; font-size: .75rem; padding: 0 .45rem; border-radius: 999px;
  background: var(--code-bg); color: var(--muted); vertical-align: middle;
}
.badge { font-size: .78rem; padding: .05rem .5rem; border-radius: 999px; background: var(--code-bg); color: var(--muted); white-space: nowrap; }
.badge.ok { background: var(--up-bg); color: var(--up); }
.badge.bad { background: var(--down-bg); color: var(--down); }
.badge.warn, .tag.upd { background: var(--warn-bg); color: var(--warn); }
.code { font-weight: 600; font-variant-numeric: tabular-nums; }
.code.ok { color: var(--up); }
.code.warn { color: var(--warn); }
.code.bad { color: var(--down); }

/* ---- sparkline & bars ---- */
.spark { display: block; height: 16px; max-width: 100%; }
.spark rect { fill: var(--line); }
.spark .s1 { fill: var(--up); }
.spark .s2 { fill: var(--warn); }
.spark .s3 { fill: var(--down); }
.spark-wrap { margin-top: .9rem; }
.spark-wrap .spark { width: 100%; }
.bar { display: block; width: 100%; height: 6px; margin: .35rem 0; }
.bar .track { fill: var(--line); }
.bar .fill { fill: var(--accent); }
.bar .fill.warn { fill: var(--warn); }
.bar .fill.bad { fill: var(--down); }

/* ---- dashboard ---- */
.sys-head { display: flex; align-items: baseline; gap: .75rem; flex-wrap: wrap; margin-bottom: .75rem; }
.meters { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem 1.5rem; }
.meter-top { display: flex; justify-content: space-between; }
.meter-top span { color: var(--muted); }
.meter small { color: var(--muted); }

.summary { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 1rem; margin-bottom: 1rem; }
.tile { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: .8rem 1rem; }
.tile b { display: block; font-size: 1.6rem; line-height: 1.2; font-variant-numeric: tabular-nums; }
.tile span { color: var(--muted); font-size: .85rem; }
.tile.up b { color: var(--up); }
.tile.warn b { color: var(--warn); }
.tile.down b { color: var(--down); }

.toolbar { display: flex; gap: .75rem; align-items: center; flex-wrap: wrap; margin-bottom: .75rem; }
.toolbar input[type=search] { flex: 1 1 240px; }
.toolbar .btn { margin-left: auto; }

.table-wrap { overflow-x: auto; margin: 0 -1.25rem; padding: 0 1.25rem; }
table { width: 100%; border-collapse: collapse; }
th { text-align: left; font-size: .75rem; color: var(--muted); font-weight: 600; text-transform: uppercase; letter-spacing: .04em; padding: .5rem .6rem; border-bottom: 1px solid var(--line); white-space: nowrap; }
td { padding: .6rem; border-bottom: 1px solid var(--line); vertical-align: top; }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: var(--bg); }
.subs td { white-space: nowrap; }
.subs .c-name { white-space: normal; min-width: 220px; }
.subs .c-dot { width: 1%; padding-right: 0; padding-top: .95rem; }
.subs .c-dns { max-width: 240px; overflow: hidden; text-overflow: ellipsis; color: var(--muted); font-size: .9rem; }
.subs .c-spark { width: 160px; }
.name { font-weight: 600; overflow-wrap: anywhere; }
.prob { color: var(--down); font-size: .82rem; margin-top: .15rem; }
.empty { text-align: center; padding: 2rem 1rem; }
.empty h2 { margin-bottom: .5rem; }

/* ---- detail ---- */
.head { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; flex-wrap: wrap; margin-bottom: 1rem; }
.head h1 { margin-bottom: .2rem; }
.head p { margin: 0; }
.actions, .svc-actions { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }
.actions form, .svc-actions form { margin: 0; }
.svc-actions { margin-top: 1rem; }
dl { display: grid; grid-template-columns: max-content 1fr; gap: .45rem 1rem; margin: 0; }
dt { color: var(--muted); }
dd { margin: 0; min-width: 0; overflow-wrap: anywhere; }
.problems { border-color: var(--down); background: var(--down-bg); }
.problems h3 { color: var(--down); }
.problems ul { margin: 0; padding-left: 1.2rem; }
.event { display: flex; gap: .5rem; align-items: baseline; padding: .25rem 0; flex-wrap: wrap; }
.notes { white-space: pre-wrap; margin-top: 0; }
.danger-zone { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; margin: .5rem 0 2rem; }

/* ---- forms ---- */
input[type=text], input[type=password], input[type=number], input[type=search], select, textarea {
  width: 100%; padding: .5rem .65rem; border: 1px solid var(--line); border-radius: 7px;
  background: var(--card); color: var(--text); font: inherit;
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
textarea { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9rem; resize: vertical; }
.form label { display: block; margin-bottom: .9rem; font-weight: 500; }
.form label input, .form label select, .form label textarea { margin-top: .3rem; font-weight: 400; }
.form label small, .form > small, fieldset > small { display: block; color: var(--muted); font-weight: 400; margin-top: .25rem; }
label.check { display: flex; gap: .5rem; align-items: center; font-weight: 400; cursor: pointer; }
.toolbar label.check { white-space: nowrap; }
fieldset { border: 0; border-top: 1px solid var(--line); padding: 1rem 0 0; margin: 0 0 1rem; min-width: 0; }
legend { font-weight: 600; padding-right: .5rem; }
.row { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 0 1rem; }
.form-actions { display: flex; gap: .5rem; flex-wrap: wrap; margin-top: .5rem; }
.login { max-width: 360px; margin: 10vh auto 0; }

/* ---- logs ---- */
.logs {
  background: #0f1217; color: #d5dbe3; padding: 1rem; border-radius: var(--radius);
  max-height: 70vh; overflow: auto; font-size: .82rem; line-height: 1.45; white-space: pre-wrap; overflow-wrap: anywhere;
}

@media (max-width: 640px) {
  main { padding: 1rem; }
  .top { padding: .6rem 1rem; }
  .card { padding: 1rem; }
  .table-wrap { margin: 0 -1rem; padding: 0 1rem; }
  .grid { grid-template-columns: 1fr; }
  dl { grid-template-columns: 1fr; gap: .1rem; }
  dd { margin-bottom: .5rem; }
}