:root {
  --sidebar: #17202a;
  --panel: #ffffff;
  --line: #d8dee6;
  --muted: #607080;
  --bg: #f3f6f8;
  --accent: #1463ff;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: #17202a;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.app-shell {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  min-height: 100vh;
}

.sidebar {
  background: var(--sidebar);
  color: #fff;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.brand {
  font-weight: 700;
  font-size: 20px;
}

.sidebar .nav-link {
  color: #cbd6e2;
  border-radius: 6px;
  padding: 10px 12px;
}

.sidebar .nav-link.active,
.sidebar .nav-link:hover {
  background: #233446;
  color: #fff;
}

.logout-form {
  margin-top: auto;
}

.app-main {
  min-width: 0;
  display: flex;
  flex-direction: column;
}

.topbar {
  background: #fff;
  border-bottom: 1px solid var(--line);
  padding: 18px 24px;
}

.topbar h1 {
  font-size: 24px;
  margin: 0;
}

.topbar p,
.muted {
  color: var(--muted);
  margin: 0;
  font-size: 13px;
}

.content-wrap {
  padding: 24px;
  flex: 1;
}

.footer {
  border-top: 1px solid var(--line);
  padding: 12px 24px;
  color: var(--muted);
}

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

.panel h2 {
  font-size: 18px;
  margin: 0 0 14px;
}

.grid {
  display: grid;
  gap: 16px;
}

.stats-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

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

.stats-grid .panel span {
  color: var(--muted);
  display: block;
  font-size: 13px;
}

.stats-grid .panel strong {
  display: block;
  margin-top: 6px;
  font-size: 20px;
  overflow-wrap: anywhere;
}

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

.toolbar .form-control {
  flex: 1 1 320px;
}

.toolbar .form-select {
  max-width: 180px;
}

.metrics-head {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
}

.range-buttons {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.range-buttons button {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 6px;
  padding: 6px 10px;
  font-size: 13px;
}

.range-buttons button.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.metric-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 16px 0;
}

.metric-summary > div {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #f8fafc;
}

.metric-summary span {
  display: block;
  color: var(--muted);
  font-size: 13px;
}

.metric-summary strong {
  display: block;
  font-size: 24px;
  margin-top: 4px;
}

.chart-wrap {
  width: 100%;
  min-height: 240px;
  position: relative;
}

.chart-wrap canvas {
  width: 100%;
  height: 260px;
  display: block;
}

.metric-chart-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.metric-chart-panel {
  overflow: hidden;
}

.chart-title {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
  margin-bottom: 8px;
}

.chart-title h2 {
  margin: 0;
}

.chart-title span {
  color: var(--muted);
  font-size: 14px;
  white-space: nowrap;
}

.chart-legend {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--muted);
  font-size: 13px;
  margin-top: 10px;
}

.legend-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
  margin-right: 6px;
}

.legend-dot.cpu {
  background: #1769ff;
}

.legend-dot.ram {
  background: #13a66f;
}

.legend-dot.disk {
  background: #d97706;
}

.monospace,
code,
.console {
  font-family: "Cascadia Mono", Consolas, "Liberation Mono", monospace;
}

.breadcrumb-line {
  margin-top: 12px;
  color: var(--muted);
  overflow-wrap: anywhere;
}

.console {
  background: #111820;
  color: #d8f2df;
  border-radius: 6px;
  min-height: 260px;
  padding: 14px;
  white-space: pre-wrap;
  overflow: auto;
}

.console.error {
  color: #ffc8c8;
}

.status-line {
  padding: 10px 12px;
  border-radius: 6px;
  background: #edf1f5;
  font-weight: 600;
}

.status-line.running {
  background: #fff4d8;
}

.status-line.success {
  background: #daf7e6;
}

.status-line.error,
.status-line.timeout {
  background: #ffe1e1;
}

.step-list {
  display: grid;
  gap: 8px;
}

.step-item {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px;
}

.step-item.running {
  border-color: #f0b429;
}

.step-item.success {
  border-color: #28a745;
}

.step-item.error,
.step-item.timeout {
  border-color: #dc3545;
}

.shortcut-group {
  margin-bottom: 14px;
}

.shortcut-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-top: 8px;
}

.drop-zone {
  border: 2px dashed #95a4b8;
  border-radius: 8px;
  padding: 34px;
  display: grid;
  gap: 6px;
  place-items: center;
  cursor: pointer;
  color: var(--muted);
}

.drop-zone.dragover {
  border-color: var(--accent);
  background: #eef5ff;
}

.upload-queue {
  display: grid;
  gap: 10px;
}

.upload-item {
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 10px;
}

.backup-grid {
  grid-template-columns: 1fr;
}

.backup-form {
  display: grid;
  gap: 14px;
}

.backup-form-row {
  display: grid;
  grid-template-columns: 1fr 160px 140px;
  gap: 12px;
}

.backup-day-list,
.backup-choice-list,
.backup-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  align-items: center;
}

.backup-day-list label,
.backup-choice-list label {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  color: #233446;
}

.backup-table td {
  vertical-align: top;
}

.backup-actions {
  justify-content: flex-end;
  min-width: 220px;
}

.backup-edit-form {
  margin-top: 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafc;
}

.backup-error {
  margin: 0;
  white-space: pre-wrap;
  color: #9f1239;
  background: #fff1f2;
  border-radius: 6px;
  padding: 10px;
}

.login-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  background: #e9eef4;
}

.login-panel {
  width: min(420px, calc(100vw - 32px));
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
}

.login-panel h1 {
  font-size: 24px;
  margin-bottom: 6px;
}

@media (max-width: 900px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  .stats-grid,
  .two-col,
  .metric-summary,
  .backup-form-row {
    grid-template-columns: 1fr;
  }

  .range-buttons {
    justify-content: flex-start;
  }
}