:root {
  --bg: #f4f6f9;
  --surface: #ffffff;
  --surface-2: #eef1f5;
  --text: #1b2430;
  --muted: #5d6b7c;
  --border: #d8dee6;
  --primary: #1565c0;
  --primary-text: #ffffff;
  --good: #1b7f3b;
  --good-bg: #e3f4e8;
  --warn: #9a6200;
  --warn-bg: #fff3d6;
  --bad: #b3261e;
  --bad-bg: #fde7e5;
  --shadow: 0 8px 30px rgba(20, 30, 45, .18);
  --radius: 10px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #11161d;
    --surface: #1a212b;
    --surface-2: #232c38;
    --text: #e6ebf1;
    --muted: #93a1b2;
    --border: #313c4a;
    --primary: #4b9be8;
    --primary-text: #0b1520;
    --good: #5fd08a;
    --good-bg: #173523;
    --warn: #f2c14e;
    --warn-bg: #3a2f12;
    --bad: #ff8a80;
    --bad-bg: #3d1a18;
    --shadow: 0 8px 30px rgba(0, 0, 0, .5);
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.topbar {
  display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding: 12px 24px; background: var(--surface); border-bottom: 1px solid var(--border);
}
.brand { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.logo { font-weight: 800; font-size: 20px; letter-spacing: .5px; color: var(--primary); }
.olt-name { color: var(--muted); }
.operator { display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 14px; }
.operator input { width: 180px; }

.tabs { display: flex; gap: 4px; padding: 0 24px; background: var(--surface); border-bottom: 1px solid var(--border); overflow-x: auto; }
.tab {
  background: none; border: 0; border-bottom: 3px solid transparent; color: var(--muted);
  padding: 12px 14px; font: inherit; font-weight: 600; cursor: pointer; white-space: nowrap;
}
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.count { display: inline-block; min-width: 22px; padding: 0 6px; border-radius: 11px; background: var(--surface-2); color: var(--text); font-size: 12px; text-align: center; }
.count.has { background: var(--primary); color: var(--primary-text); }

main { padding: 20px 24px; max-width: 1300px; margin: 0 auto; }
.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; }
.toolbar { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.toolbar h2 { margin: 0; font-size: 18px; }
.toolbar-actions { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.toolbar-actions label { display: flex; align-items: center; gap: 6px; color: var(--muted); font-size: 14px; }
.hint { color: var(--muted); margin: 8px 0 14px; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

.table-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: 8px; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { background: var(--surface-2); font-size: 13px; color: var(--muted); font-weight: 600; }
tr:last-child td { border-bottom: 0; }
td.empty { text-align: center; color: var(--muted); padding: 28px; white-space: normal; }
td.wrap { white-space: normal; }
.mono { font-family: ui-monospace, "Cascadia Mono", Consolas, monospace; font-size: 14px; }
.sub { display: block; color: var(--muted); font-size: 12px; }
tr.new-row { animation: flash 2s ease-out; }
@keyframes flash { from { background: var(--warn-bg); } to { background: transparent; } }

input, select {
  font: inherit; color: var(--text); background: var(--surface); border: 1px solid var(--border);
  border-radius: 6px; padding: 7px 9px; min-height: 36px;
}
input[readonly] { background: var(--surface-2); }
input:focus, select:focus { outline: 2px solid var(--primary); outline-offset: -1px; }
.check { cursor: pointer; }
.check input { min-height: 0; }

.btn {
  font: inherit; font-weight: 600; cursor: pointer; border-radius: 6px; padding: 7px 14px; min-height: 36px;
  border: 1px solid var(--border); background: var(--surface-2); color: var(--text);
}
.btn:hover { filter: brightness(.97); }
.btn:disabled { opacity: .55; cursor: progress; }
.btn-primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); }
.btn-danger { background: var(--bad); border-color: var(--bad); color: #fff; }
.btn-ghost { background: transparent; }
.btn-sm { padding: 4px 10px; min-height: 30px; font-size: 13px; }

.badge { display: inline-block; padding: 2px 9px; border-radius: 12px; font-size: 12px; font-weight: 700; }
.badge-good { background: var(--good-bg); color: var(--good); }
.badge-warn { background: var(--warn-bg); color: var(--warn); }
.badge-bad { background: var(--bad-bg); color: var(--bad); }
.badge-none { background: var(--surface-2); color: var(--muted); }

.dialog {
  border: 1px solid var(--border); border-radius: 12px; padding: 0; width: min(680px, calc(100vw - 32px));
  background: var(--surface); color: var(--text); box-shadow: var(--shadow);
}
.dialog-sm { width: min(440px, calc(100vw - 32px)); }
.dialog::backdrop { background: rgba(10, 15, 25, .45); }
.dialog form { padding: 20px 22px; }
.dialog h3 { margin: 0 0 14px; }
.grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 14px; }
.grid label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); font-weight: 600; }
.grid .span2 { grid-column: span 2; }
.actions { display: flex; justify-content: flex-end; gap: 8px; margin-top: 18px; flex-wrap: wrap; }

.preview { margin-top: 14px; }
.preview summary { cursor: pointer; color: var(--muted); font-size: 14px; }
.preview pre { white-space: pre-wrap; word-break: break-word; }
pre {
  background: var(--surface-2); border: 1px solid var(--border); border-radius: 6px; padding: 10px 12px;
  font: 13px/1.5 ui-monospace, "Cascadia Mono", Consolas, monospace; overflow-x: auto; white-space: pre;
}
pre.log { max-height: 60vh; overflow: auto; }

.result { margin-top: 14px; padding: 14px; border-radius: 8px; border: 1px solid var(--border); }
.result.ok { background: var(--good-bg); border-color: transparent; }
.result.warn { background: var(--warn-bg); border-color: transparent; }
.result.err { background: var(--bad-bg); border-color: transparent; color: var(--bad); }
.result .big { font-size: 18px; font-weight: 700; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: 10px; margin: 14px 0; }
.stat { background: var(--surface-2); border-radius: 8px; padding: 10px 14px; cursor: pointer; border: 2px solid transparent; }
.stat.active { border-color: var(--primary); }
.stat .n { font-size: 22px; font-weight: 800; }
.stat .l { font-size: 13px; color: var(--muted); }
.stat.good .n { color: var(--good); }
.stat.bad .n { color: var(--bad); }
.stat.warn .n { color: var(--warn); }

.filters { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.filters label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); font-weight: 600; }
.filters .grow { flex: 1 1 260px; }

.pager-row { display: flex; justify-content: space-between; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.pager { display: flex; gap: 4px; flex-wrap: wrap; }
.pager button { min-width: 36px; }
.pager button.active { background: var(--primary); color: var(--primary-text); border-color: var(--primary); }

.dot { display: inline-block; width: 12px; height: 12px; border-radius: 50%; vertical-align: middle; margin-right: 6px; }
.dot.on { background: var(--good); box-shadow: 0 0 0 3px var(--good-bg); }
.dot.off { background: var(--bad); box-shadow: 0 0 0 3px var(--bad-bg); }
.dot.unk { background: var(--muted); }

.login-body { min-height: 100vh; display: grid; place-items: center; padding: 16px; }
.login-box { width: min(380px, 100%); background: var(--surface); border: 1px solid var(--border); border-radius: 12px; padding: 28px 24px; box-shadow: var(--shadow); }
.login-box .logo { font-size: 28px; }
.login-box form { display: flex; flex-direction: column; gap: 14px; margin-top: 18px; }
.login-box label { display: flex; flex-direction: column; gap: 4px; font-size: 13px; color: var(--muted); font-weight: 600; }
.login-box .btn { width: 100%; min-height: 42px; }
.user-box { display: flex; align-items: center; gap: 10px; color: var(--muted); font-size: 14px; }
.user-box b { color: var(--text); }

.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%); z-index: 99;
  background: var(--text); color: var(--bg); padding: 10px 16px; border-radius: 8px; box-shadow: var(--shadow);
  max-width: calc(100vw - 32px);
}

@media (max-width: 640px) {
  .topbar, .tabs { padding-left: 16px; padding-right: 16px; }
  main { padding: 16px; }
  .grid { grid-template-columns: 1fr; }
  .grid .span2 { grid-column: auto; }
}