:root {
  color-scheme: dark;
  --bg: #111318;
  --panel: #181b22;
  --panel-2: #20242d;
  --line: #313744;
  --text: #eff2f6;
  --muted: #9aa6b2;
  --green: #49d17d;
  --amber: #e6b84d;
  --red: #ef6b6b;
  --cyan: #58c7e6;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  display: grid;
  grid-template-columns: 232px 1fr;
}

.sidebar {
  border-right: 1px solid var(--line);
  background: #151820;
  min-height: 100vh;
  padding: 18px 14px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.brand {
  font-size: 18px;
  font-weight: 700;
}

nav {
  display: grid;
  gap: 4px;
}

button, select, input {
  font: inherit;
}

nav button, .session button, form button {
  color: var(--text);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 6px;
  min-height: 36px;
  padding: 8px 10px;
  text-align: left;
  cursor: pointer;
}

nav button:hover, nav button.active {
  background: var(--panel-2);
  border-color: var(--line);
}

.session {
  margin-top: auto;
  color: var(--muted);
  display: grid;
  gap: 8px;
}

.session button, form button {
  background: var(--panel-2);
  border-color: var(--line);
  text-align: center;
}

main {
  min-width: 0;
}

header {
  min-height: 66px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  padding: 0 24px;
}

h1 {
  margin: 0;
  font-size: 22px;
  font-weight: 700;
}

select, input {
  color: var(--text);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 6px;
  min-height: 36px;
  padding: 7px 10px;
}

#content {
  padding: 22px 24px 36px;
  display: grid;
  gap: 18px;
}

.grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.card, .chart, .table-panel, .search-row {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.card {
  min-height: 92px;
  padding: 14px;
  display: grid;
  align-content: space-between;
}

.card span {
  color: var(--muted);
}

.card strong {
  font-size: 24px;
}

.charts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.chart {
  padding: 14px;
}

.chart h2, .table-panel h2 {
  margin: 0 0 10px;
  font-size: 15px;
}

canvas {
  width: 100%;
  height: 220px;
  display: block;
}

table {
  width: 100%;
  border-collapse: collapse;
}

.table-panel {
  overflow: hidden;
}

.table-panel h2 {
  padding: 14px 14px 0;
}

th, td {
  border-top: 1px solid var(--line);
  padding: 9px 10px;
  text-align: left;
  white-space: nowrap;
}

th {
  color: var(--muted);
  background: #171a21;
  font-weight: 600;
}

td {
  color: #dce3ea;
}

.ok { color: var(--green); }
.warn { color: var(--amber); }
.bad { color: var(--red); }
.info { color: var(--cyan); }

.login-panel {
  min-height: 100vh;
  display: grid;
  place-items: center;
}

form {
  width: min(380px, calc(100vw - 32px));
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  display: grid;
  gap: 14px;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
}

#login-error {
  min-height: 20px;
  color: var(--red);
  margin: 0;
}

.hidden { display: none !important; }

.search-row {
  padding: 14px;
  display: flex;
  gap: 10px;
  align-items: center;
}

.search-row input {
  min-width: 260px;
}

@media (max-width: 900px) {
  body {
    grid-template-columns: 1fr;
  }
  .sidebar {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
  nav {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .grid, .charts {
    grid-template-columns: 1fr;
  }
  header {
    padding: 14px;
  }
  #content {
    padding: 14px;
  }
  .table-panel {
    overflow-x: auto;
  }
}