:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --text: #1c2230;
  --muted: #6b7385;
  --border: #e2e5eb;
  --primary: #2f6fed;
  --primary-text: #ffffff;
  --danger: #d33f3f;
  --ok: #1f9d55;
  --warn-bg: #fff6e0;
  --warn-text: #7a5600;
  --radius: 10px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12151c;
    --surface: #1b1f29;
    --text: #e6e9ef;
    --muted: #8f97a8;
    --border: #2c3240;
    --primary: #4c84f5;
    --danger: #ef5f5f;
    --ok: #3cc47c;
    --warn-bg: #3a2f12;
    --warn-text: #f2cf74;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

h1, h2 { margin: 0 0 12px; line-height: 1.2; }
h1 { font-size: 24px; }
h2 { font-size: 16px; }
code { font-size: 0.92em; background: var(--bg); padding: 1px 5px; border-radius: 4px; }

.muted { color: var(--muted); }
.small { font-size: 12.5px; }
.right { text-align: right; }
.center { text-align: center; }
.error { color: var(--danger); margin: 0; }
.warning { background: var(--warn-bg); color: var(--warn-text); padding: 8px 12px; border-radius: 8px; }

/* Layout */
.topbar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 24px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 700; font-size: 16px; }
#server-info { margin-left: auto; font-family: ui-monospace, monospace; }
.account { display: flex; align-items: center; gap: 4px; }
.account #me { font-weight: 600; margin-right: 4px; }

.tabs { display: flex; gap: 4px; }
.tabs a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 550;
  padding: 6px 12px;
  border-radius: 8px;
}
.tabs a:hover { color: var(--text); }
.tabs a.active { color: var(--text); background: var(--bg); }

.tab-panel { display: grid; gap: 20px; }
.tab-panel[hidden] { display: none; }

.container { max-width: 1100px; margin: 0 auto; padding: 24px 16px; display: grid; gap: 20px; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}
.card.narrow { width: 100%; max-width: 440px; }
.card-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.card-head h2 { margin: 0; }
.pager { display: flex; justify-content: flex-end; align-items: center; gap: 10px; flex-wrap: wrap; margin-top: 10px; }

.center-page { min-height: 100vh; display: grid; place-items: center; padding: 16px; }

.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.row > input { flex: 1 1 200px; }
.stack { display: grid; gap: 14px; }
.stack label { display: grid; gap: 4px; font-weight: 500; }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; }
.stat {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 20px;
  display: grid;
}
.stat-label { color: var(--muted); font-size: 12.5px; }
.stat-value { font-size: 26px; font-weight: 650; font-variant-numeric: tabular-nums; }

/* Controls */
input {
  font: inherit;
  color: inherit;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 10px;
  min-width: 0;
}
input:focus { outline: 2px solid var(--primary); outline-offset: -1px; }
.check { display: flex; gap: 6px; align-items: center; color: var(--muted); white-space: nowrap; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font: inherit;
  font-weight: 550;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 14px;
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { border-color: var(--muted); }
.btn:disabled { opacity: 0.6; cursor: default; }
.btn.primary { background: var(--primary); border-color: var(--primary); color: var(--primary-text); }
.btn.danger { color: var(--danger); }
.btn.danger:hover { border-color: var(--danger); }
.btn.ghost { border-color: transparent; background: transparent; }
.btn.small { padding: 4px 10px; font-size: 12.5px; }
.btn.big { padding: 12px 20px; font-size: 15px; margin: 8px 0; }

/* Table */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: 10px 8px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
th { font-size: 12px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.03em; }
th.right, td.right { text-align: right; }
tbody tr:last-child td { border-bottom: none; }
.name { font-weight: 600; }
.actions { display: inline-flex; gap: 6px; flex-wrap: wrap; justify-content: flex-end; }

.badge {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--border);
  color: var(--muted);
}
.badge.online { color: var(--ok); border-color: var(--ok); }
.badge.online::before { content: "● "; }
.badge.active { color: var(--text); }
.badge.revoked, .badge.expired { color: var(--danger); border-color: var(--danger); }
.badge.tag { margin-left: 8px; font-size: 11px; padding: 0 7px; }
.danger-text { color: var(--danger); }

/* Overflow action menu */
.menu { position: relative; display: inline-block; }
.menu summary { list-style: none; }
.menu summary::-webkit-details-marker { display: none; }
.menu-items {
  position: absolute;
  right: 0;
  top: calc(100% + 4px);
  z-index: 10;
  min-width: 180px;
  display: grid;
  padding: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgb(0 0 0 / 0.15);
  text-align: left;
}
.menu-items button {
  font: inherit;
  color: var(--text);
  background: none;
  border: none;
  border-radius: 6px;
  padding: 7px 10px;
  text-align: left;
  cursor: pointer;
}
.menu-items button:hover { background: var(--bg); }
.menu-items button.danger { color: var(--danger); }

/* Dialog & toast */
dialog {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  padding: 20px;
  width: min(520px, calc(100vw - 32px));
}
dialog.wide { width: min(760px, calc(100vw - 32px)); }
dialog::backdrop { background: rgb(0 0 0 / 0.4); }
.row-end { display: flex; gap: 8px; justify-content: flex-end; }
label[hidden] { display: none; }

.toast {
  position: fixed;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--text);
  color: var(--bg);
  padding: 10px 16px;
  border-radius: 8px;
  box-shadow: 0 6px 20px rgb(0 0 0 / 0.2);
  max-width: calc(100vw - 32px);
}
.toast.error { background: var(--danger); color: #fff; }

@media (max-width: 860px) {
  .topbar { padding: 12px 16px; flex-wrap: wrap; }
  #server-info { order: 4; width: 100%; margin-left: 0; }
  .tabs { order: 3; width: 100%; overflow-x: auto; }
  .account { margin-left: auto; }
}