:root {
  color-scheme: light;
  --surface-1: #fcfcfb;
  --page: #f9f9f7;
  --surface-2: #ffffff;
  --text-primary: #0b0b0b;
  --text-secondary: #52514e;
  --text-muted: #898781;
  --gridline: #e1e0d9;
  --border: rgba(11, 11, 11, 0.1);
  --seq-blue-100: #cde2fb;
  --seq-blue-300: #6da7ec;
  --seq-blue-450: #2a78d6;
  --seq-blue-600: #184f95;
  --status-good: #0ca30c;
  --status-warning: #b8790a;
  --status-serious: #c05a30;
  --status-critical: #d03b3b;
  --success-text: #006300;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --surface-1: #1a1a19;
    --page: #0d0d0d;
    --surface-2: #232322;
    --text-primary: #ffffff;
    --text-secondary: #c3c2b7;
    --text-muted: #898781;
    --gridline: #2c2c2a;
    --border: rgba(255, 255, 255, 0.1);
    --seq-blue-100: #17324f;
    --seq-blue-300: #2a5f9e;
    --seq-blue-450: #3987e5;
    --seq-blue-600: #86b6ef;
    --status-good: #0ca30c;
    --status-warning: #fab219;
    --status-serious: #ec835a;
    --status-critical: #e66767;
    --success-text: #0ca30c;
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--page);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 14px;
  line-height: 1.45;
}

a {
  color: var(--seq-blue-450);
}

/* ---------------- app shell: sidebar + content ---------------- */

.app-shell {
  display: flex;
  min-height: 100vh;
  align-items: stretch;
}

.sidebar {
  width: 216px;
  flex-shrink: 0;
  background: var(--surface-1);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 18px 12px;
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
}

.sidebar .brand {
  font-weight: 700;
  font-size: 15px;
  padding: 2px 10px 18px;
  white-space: nowrap;
}

.sidebar nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
}

.sidebar nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  text-decoration: none;
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13px;
  white-space: nowrap;
}

.sidebar nav a .icon {
  width: 16px;
  text-align: center;
  font-size: 14px;
  flex-shrink: 0;
}

.sidebar nav a:hover {
  background: var(--surface-2);
  color: var(--text-primary);
}

.sidebar nav a.active {
  background: color-mix(in srgb, var(--seq-blue-450) 14%, transparent);
  color: var(--seq-blue-450);
  font-weight: 600;
}

.sidebar-footer {
  border-top: 1px solid var(--border);
  padding-top: 12px;
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.content-header {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--page);
  z-index: 5;
}

.content-header h1 {
  margin: 0;
  flex-shrink: 0;
}

.content-header .spacer {
  flex: 1;
}

.content-main {
  max-width: 1280px;
  width: 100%;
  padding: 20px 24px 40px;
  margin: 0 auto;
}

@media (max-width: 768px) {
  .app-shell {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    height: auto;
    position: sticky;
    top: 0;
    z-index: 20;
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    padding: 10px 12px;
    gap: 4px 6px;
  }
  .sidebar .brand {
    padding: 0 8px 0 2px;
  }
  .sidebar nav {
    flex-direction: row;
    flex-wrap: wrap;
    flex: 1 1 auto;
    gap: 4px;
  }
  .sidebar nav a {
    padding: 6px 9px;
  }
  .sidebar nav a .icon {
    width: auto;
  }
  .sidebar-footer {
    flex-direction: row;
    align-items: center;
    width: 100%;
    margin: 4px 0 0;
    padding-top: 8px;
    border-top: 1px solid var(--border);
    justify-content: space-between;
  }
  .content-header {
    padding: 12px 16px;
    flex-wrap: wrap;
  }
  .content-main {
    padding: 14px 16px 30px;
  }
}

#ws-status {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
}
#ws-status[data-state="connected"] {
  color: var(--status-good);
}
#ws-status[data-state="down"] {
  color: var(--status-critical);
}

.logout-btn {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  padding: 6px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 13px;
  white-space: nowrap;
}
.logout-btn:hover {
  color: var(--text-primary);
}

h1 {
  font-size: 18px;
  margin: 0 0 16px;
}
h2 {
  font-size: 13px;
  margin: 0 0 10px;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px;
  margin-bottom: 18px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
  margin-bottom: 18px;
}
.two-col-grid {
  grid-template-columns: 1.2fr 1fr;
}
@media (max-width: 768px) {
  .two-col-grid {
    grid-template-columns: 1fr;
  }
}

.stat-tile {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 18px;
}
.stat-tile .label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
.stat-tile .value {
  font-size: 26px;
  font-weight: 600;
  margin: 4px 0 8px;
  font-variant-numeric: tabular-nums;
}
.stat-tile .sub {
  font-size: 12px;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

/* ---------------- radial ring gauges ---------------- */

.ring-tile {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 18px;
  display: flex;
  align-items: center;
  gap: 16px;
}
.ring-tile svg {
  flex-shrink: 0;
}
.ring-tile .ring-body {
  min-width: 0;
}
.ring-tile .ring-label {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}
.ring-tile .ring-sub {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 4px;
}
.ring-track {
  fill: none;
  stroke: var(--gridline);
}
.ring-fill {
  fill: none;
  stroke-linecap: round;
  stroke: var(--seq-blue-450);
  transition: stroke-dashoffset 0.5s ease, stroke 0.3s ease;
}
.ring-fill[data-level="warning"] {
  stroke: var(--status-warning);
}
.ring-fill[data-level="critical"] {
  stroke: var(--status-critical);
}
.ring-value {
  fill: var(--text-primary);
  font-weight: 600;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}
.ring-unit {
  fill: var(--text-muted);
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
}

.meter {
  height: 8px;
  border-radius: 4px;
  background: var(--gridline);
  overflow: hidden;
}
.meter > span {
  display: block;
  height: 100%;
  background: var(--seq-blue-450);
  border-radius: 4px;
}
.meter[data-level="warning"] > span {
  background: var(--status-warning);
}
.meter[data-level="critical"] > span {
  background: var(--status-critical);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
th,
td {
  text-align: left;
  padding: 7px 10px;
  border-bottom: 1px solid var(--gridline);
  vertical-align: top;
}
th {
  color: var(--text-muted);
  font-weight: 600;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
tbody tr:hover {
  background: var(--surface-2);
}
.table-wrap {
  overflow-x: auto;
}

.mono {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 12px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.badge-info {
  background: color-mix(in srgb, var(--seq-blue-450) 16%, transparent);
  color: var(--seq-blue-450);
}
.badge-warning {
  background: color-mix(in srgb, var(--status-warning) 20%, transparent);
  color: var(--status-warning);
}
.badge-critical {
  background: color-mix(in srgb, var(--status-critical) 18%, transparent);
  color: var(--status-critical);
}
.badge-good {
  background: color-mix(in srgb, var(--status-good) 16%, transparent);
  color: var(--status-good);
}
.badge-neutral {
  background: var(--gridline);
  color: var(--text-secondary);
}

.event-feed {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 420px;
  overflow-y: auto;
}
.event-row {
  display: grid;
  grid-template-columns: 70px 90px 1fr;
  gap: 10px;
  align-items: baseline;
  padding: 6px 8px;
  border-left: 3px solid var(--gridline);
  border-radius: 4px;
  font-size: 13px;
}
.event-row[data-severity="warning"] {
  border-left-color: var(--status-warning);
}
.event-row[data-severity="critical"] {
  border-left-color: var(--status-critical);
  background: color-mix(in srgb, var(--status-critical) 6%, transparent);
}
.event-row .ts {
  color: var(--text-muted);
  font-size: 11px;
  font-variant-numeric: tabular-nums;
}
.event-row .cat {
  color: var(--text-muted);
  font-size: 11px;
  text-transform: uppercase;
}
.event-row .title {
  color: var(--text-primary);
}

/* ---------------- process groups ---------------- */

details.proc-group {
  border-top: 1px solid var(--gridline);
}
details.proc-group:first-of-type {
  border-top: none;
}
details.proc-group summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 4px;
  user-select: none;
  font-size: 13px;
  font-weight: 600;
}
details.proc-group summary::-webkit-details-marker {
  display: none;
}
details.proc-group summary::before {
  content: "▸";
  display: inline-block;
  margin-right: 8px;
  color: var(--text-muted);
  transition: transform 0.15s ease;
}
details.proc-group[open] summary::before {
  transform: rotate(90deg);
}
details.proc-group summary .count {
  color: var(--text-muted);
  font-weight: 400;
  font-size: 12px;
}
.proc-group-body {
  max-height: 320px;
  overflow-y: auto;
  padding-bottom: 6px;
}
.kernel-note {
  color: var(--text-muted);
  font-size: 12px;
  padding: 8px 4px 0;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 14px;
}
.toolbar input[type="text"],
.toolbar select,
.toolbar input[type="date"] {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 13px;
}
button {
  font-family: inherit;
}
.btn {
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 6px;
  padding: 6px 12px;
  font-size: 13px;
  cursor: pointer;
}
.btn:hover {
  border-color: var(--text-secondary);
}
.btn-danger {
  color: var(--status-critical);
  border-color: var(--status-critical);
}
.btn-primary {
  background: var(--seq-blue-450);
  border-color: var(--seq-blue-450);
  color: #fff;
}
.btn:disabled {
  opacity: 0.5;
  cursor: default;
}

.empty {
  color: var(--text-muted);
  font-size: 13px;
  padding: 10px 0;
}

.section-title {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 28px 0 10px;
}
.section-title:first-child {
  margin-top: 0;
}

/* --- login page --- */
.login-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.login-card {
  width: 100%;
  max-width: 360px;
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px;
}
.login-card h1 {
  text-align: center;
  margin-bottom: 4px;
}
.login-card .sub {
  text-align: center;
  color: var(--text-muted);
  font-size: 12px;
  margin-bottom: 20px;
}
.field {
  margin-bottom: 14px;
}
.field label {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
  margin-bottom: 5px;
}
.field input {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: 6px;
  padding: 9px 10px;
  font-size: 14px;
}
.error-msg {
  color: var(--status-critical);
  font-size: 13px;
  margin: 10px 0 0;
  min-height: 1em;
}

.checkbox-cell {
  width: 28px;
}