* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #f5f7f8;
  color: #182026;
  font-family:
    Inter, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
}

button,
input {
  font: inherit;
}

.shell {
  display: grid;
  grid-template-columns: 248px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 32px;
  padding: 24px;
  background: #172026;
  color: #f9fbfb;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 8px;
  background: #4fb286;
  color: #0d1b18;
  font-weight: 800;
}

.brand strong,
.brand span {
  display: block;
}

.brand span {
  color: #aebbc0;
  font-size: 13px;
}

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

.nav a {
  padding: 11px 12px;
  border-radius: 8px;
  color: #d7e0e3;
  text-decoration: none;
}

.nav a.active {
  background: #26343b;
  color: #ffffff;
}

.main {
  min-width: 0;
  padding: 28px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 24px;
}

.eyebrow {
  margin: 0 0 6px;
  color: #5a6a72;
  font-size: 13px;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: 28px;
}

h2 {
  font-size: 16px;
}

.toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
}

.icon-button {
  width: 38px;
  height: 38px;
  border: 1px solid #d7dee2;
  border-radius: 8px;
  background: #ffffff;
  cursor: pointer;
}

.status-pill {
  min-width: 76px;
  padding: 8px 10px;
  border-radius: 8px;
  background: #e8ecef;
  color: #40515a;
  text-align: center;
  font-size: 13px;
}

.status-pill.ok {
  background: #dff3e7;
  color: #17613f;
}

.status-pill.warn {
  background: #fff0cf;
  color: #76510d;
}

.panel {
  display: grid;
  gap: 20px;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.metric,
.section-block,
.table-wrap,
.settings-form,
.endpoint-preview {
  border: 1px solid #dfe5e8;
  border-radius: 8px;
  background: #ffffff;
}

.metric {
  padding: 16px;
}

.metric span {
  color: #64747b;
  font-size: 13px;
}

.metric strong {
  display: block;
  margin-top: 8px;
  font-size: 30px;
}

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

.section-block {
  padding: 18px;
}

.bar-list {
  display: grid;
  gap: 12px;
  margin-top: 16px;
}

.bar-row {
  display: grid;
  grid-template-columns: minmax(80px, 1fr) 4fr auto;
  align-items: center;
  gap: 10px;
  color: #40515a;
  font-size: 13px;
}

.bar-track {
  height: 9px;
  overflow: hidden;
  border-radius: 8px;
  background: #edf1f3;
}

.bar-fill {
  height: 100%;
  border-radius: 8px;
  background: #4fb286;
}

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

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 820px;
}

th,
td {
  padding: 13px 14px;
  border-bottom: 1px solid #edf1f3;
  text-align: left;
  vertical-align: top;
  font-size: 13px;
}

th {
  color: #5a6a72;
  font-weight: 700;
}

td {
  color: #243139;
}

.settings-form {
  display: grid;
  max-width: 720px;
  gap: 16px;
  padding: 18px;
}

.settings-form label {
  display: grid;
  gap: 8px;
  color: #52636b;
  font-size: 13px;
}

.settings-form input {
  width: 100%;
  min-height: 40px;
  padding: 9px 10px;
  border: 1px solid #ccd5da;
  border-radius: 8px;
}

.settings-form button {
  width: 120px;
  min-height: 40px;
  border: 0;
  border-radius: 8px;
  background: #172026;
  color: #ffffff;
  cursor: pointer;
}

.endpoint-preview {
  max-width: 720px;
  padding: 16px;
  overflow-x: auto;
  color: #40515a;
}

.empty-state {
  padding: 28px;
  color: #697980;
  text-align: center;
}

@media (max-width: 860px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: sticky;
    top: 0;
    z-index: 2;
    gap: 16px;
    padding: 16px;
  }

  .nav {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .nav a {
    text-align: center;
  }

  .main {
    padding: 18px;
  }

  .topbar,
  .split {
    grid-template-columns: 1fr;
  }

  .topbar {
    display: grid;
  }

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

@media (max-width: 520px) {
  .metric-grid {
    grid-template-columns: 1fr;
  }

  .toolbar {
    justify-content: space-between;
  }
}