:root {
  --bg: #f4f7fb;
  --panel: #ffffff;
  --ink: #1f2937;
  --muted: #6b7280;
  --line: #dbe3ef;
  --brand: #0f766e;
  --brand-dark: #115e59;
  --sidebar: #111827;
}

* {
  box-sizing: border-box;
}

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

.app-shell {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 260px 1fr;
}

.sidebar {
  background: var(--sidebar);
  color: #fff;
  padding: 24px 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 30px;
}

.brand-icon,
.auth-mark {
  width: 42px;
  height: 42px;
  display: inline-grid;
  place-items: center;
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
}

.sidebar .nav-link {
  color: #cbd5e1;
  border-radius: 8px;
  padding: 12px 14px;
  display: flex;
  gap: 10px;
  align-items: center;
}

.sidebar .nav-link.active,
.sidebar .nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

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

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

.page-title {
  font-size: 28px;
  margin: 0;
  font-weight: 750;
}

.page-subtitle {
  color: var(--muted);
  margin: 4px 0 0;
}

.user-menu,
.actions-panel,
.toolbar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 22px;
}

.metric,
.actions-panel,
.table-wrap,
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 10px 22px rgba(15, 23, 42, 0.04);
}

.metric {
  padding: 18px;
}

.metric span {
  display: block;
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 8px;
}

.metric strong {
  font-size: 28px;
}

.metric-small {
  font-size: 16px !important;
}

.actions-panel,
.toolbar {
  padding: 16px;
  margin-bottom: 20px;
}

.panel {
  padding: 18px;
  margin-bottom: 20px;
}

.panel h2 {
  font-size: 18px;
  margin: 0 0 16px;
}

.panel-note {
  color: var(--muted);
  font-size: 14px;
  margin: -6px 0 14px;
}

.split-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-bottom: 20px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

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

.form-grid label {
  color: var(--muted);
  font-size: 13px;
  font-weight: 600;
}

.form-grid .form-control,
.form-grid .form-select {
  margin-top: 6px;
}

.check-row {
  display: flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  margin-top: 22px;
}

.span-2 {
  grid-column: span 2;
}

.inline-form {
  display: inline-flex;
  margin-left: 6px;
}

.compact-toolbar {
  padding-top: 0;
  margin-bottom: 0;
}

.toolbar .form-control {
  max-width: 320px;
}

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

.table {
  margin-bottom: 0;
}

.table thead th {
  color: var(--muted);
  font-size: 13px;
  text-transform: uppercase;
  background: #f8fafc;
}

.btn-primary {
  --bs-btn-bg: var(--brand);
  --bs-btn-border-color: var(--brand);
  --bs-btn-hover-bg: var(--brand-dark);
  --bs-btn-hover-border-color: var(--brand-dark);
}

.auth-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 20px;
  background: linear-gradient(135deg, #eef7f6, #f4f7fb 55%, #eef2ff);
}

.auth-card {
  width: min(420px, 100%);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 28px;
  box-shadow: 0 22px 44px rgba(15, 23, 42, 0.12);
}

.auth-card h1 {
  font-size: 28px;
  margin: 18px 0 4px;
}

.auth-card p {
  color: var(--muted);
  margin-bottom: 24px;
}

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

  .sidebar {
    position: static;
    padding: 16px;
  }

  .sidebar .nav {
    flex-direction: row !important;
    overflow-x: auto;
  }

  .brand {
    margin-bottom: 14px;
  }

  .content {
    padding: 18px;
  }

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

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

  .span-2 {
    grid-column: auto;
  }

  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 560px) {
  .metric-grid {
    grid-template-columns: 1fr;
  }

  .toolbar .form-control,
  .toolbar .btn,
  .actions-panel .btn {
    width: 100%;
    max-width: none;
  }
}