:root {
  --bg: #f5f6f8;
  --surface: #ffffff;
  --line: #d8dde5;
  --text: #17202a;
  --muted: #5d6978;
  --accent: #1967d2;
  --accent-dark: #124c9c;
  --danger: #b42318;
  --warn: #a05a00;
  --ok: #0f7b4f;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: Segoe UI, system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 14px;
  letter-spacing: 0;
}

a {
  color: var(--accent);
}

.shell {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  border-right: 1px solid var(--line);
  background: #ffffff;
  padding: 18px 14px;
}

.brand {
  display: block;
  color: var(--text);
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
  margin: 0 8px 22px;
}

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

.sidebar nav a {
  border-radius: 6px;
  color: var(--muted);
  font-weight: 600;
  padding: 10px 12px;
  text-decoration: none;
}

.sidebar nav a.active,
.sidebar nav a:hover {
  background: #e9f1ff;
  color: var(--accent-dark);
}

.content {
  padding: 24px;
  min-width: 0;
}

.page-head {
  align-items: center;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

h1,
h2 {
  margin: 0;
  line-height: 1.2;
}

h1 {
  font-size: 24px;
}

h2 {
  font-size: 16px;
  margin-bottom: 12px;
}

p {
  color: var(--muted);
  margin: 6px 0 0;
}

.button,
.link-button {
  align-items: center;
  background: var(--accent);
  border: 0;
  border-radius: 6px;
  color: #fff;
  cursor: pointer;
  display: inline-flex;
  font-weight: 700;
  min-height: 34px;
  padding: 7px 12px;
  text-decoration: none;
}

.button:hover,
.link-button:hover {
  background: var(--accent-dark);
  color: #fff;
}

.metric-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  margin-bottom: 18px;
}

.metric {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
}

.metric span {
  color: var(--muted);
  display: block;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.metric strong {
  display: block;
  font-size: 26px;
  margin-top: 6px;
}

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 18px;
}

.table-wrap {
  overflow-x: auto;
}

table {
  border-collapse: collapse;
  min-width: 760px;
  width: 100%;
}

th,
td {
  border-bottom: 1px solid var(--line);
  padding: 10px 8px;
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

tr:last-child td {
  border-bottom: 0;
}

.severity {
  color: var(--accent-dark);
  font-weight: 800;
}

.detail-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.plain-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.plain-list li {
  border-bottom: 1px solid var(--line);
  padding: 8px 0;
}

.plain-list li:last-child {
  border-bottom: 0;
}

.timeline {
  display: grid;
  gap: 8px;
}

.timeline-row {
  align-items: baseline;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 8px;
  grid-template-columns: 80px 160px minmax(0, 1fr);
  padding: 8px 0;
}

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

.timeline-row p {
  color: var(--text);
  margin: 0;
}

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

label {
  color: var(--muted);
  display: grid;
  font-weight: 700;
  gap: 6px;
}

input,
select,
textarea {
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  font: inherit;
  min-height: 36px;
  padding: 8px;
  width: 100%;
}

textarea {
  min-height: 90px;
  resize: vertical;
}

code {
  white-space: pre-wrap;
}

@media (max-width: 820px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-bottom: 1px solid var(--line);
    border-right: 0;
  }

  .sidebar nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .content {
    padding: 16px;
  }

  .page-head,
  .detail-grid {
    display: grid;
  }

  .metric-grid,
  .form-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .timeline-row {
    grid-template-columns: 64px minmax(0, 1fr);
  }

  .timeline-row p {
    grid-column: 1 / -1;
  }
}