:root {
  --gac-bg: #f4f6f8;
  --gac-surface: #ffffff;
  --gac-sidebar: #16324f;
  --gac-sidebar-2: #1e4268;
  --gac-accent: #2f9e6d;
  --gac-accent-hover: #27865c;
  --gac-text: #1c2b36;
  --gac-muted: #5b6b78;
  --gac-line: #e4e9ee;
  --gac-warn: #c47b16;
}

html,
body {
  height: 100%;
}

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

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

.gac-sidebar {
  background: linear-gradient(180deg, var(--gac-sidebar) 0%, #102538 100%);
  color: #fff;
  padding: 20px 16px 32px;
}

.gac-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  text-decoration: none;
  margin-bottom: 28px;
}

.gac-brand:hover {
  color: #fff;
  text-decoration: none;
}

.gac-brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--gac-accent);
  font-weight: 700;
  font-size: 12px;
}

.gac-brand-text {
  font-weight: 600;
  letter-spacing: 0.01em;
}

.gac-nav-section {
  margin: 18px 8px 6px;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #9bb0c3;
}

.gac-nav-link {
  display: block;
  padding: 8px 12px;
  margin-bottom: 4px;
  border-radius: 8px;
  color: #d7e4ef;
  text-decoration: none;
}

.gac-nav-link:hover {
  background: var(--gac-sidebar-2);
  color: #fff;
  text-decoration: none;
}

.gac-nav-link.is-active {
  background: var(--gac-accent);
  color: #fff;
}

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

.gac-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 28px;
  background: var(--gac-surface);
  border-bottom: 1px solid var(--gac-line);
}

.gac-page-title {
  margin: 0;
  font-size: 1.25rem;
  font-weight: 650;
}

.gac-topbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.gac-user-link,
.gac-logout-btn {
  color: var(--gac-muted);
  background: none;
  border: 0;
  padding: 0;
  font-size: 0.9rem;
}

.gac-user-link:hover,
.gac-logout-btn:hover {
  color: var(--gac-text);
  text-decoration: none;
}

.gac-logout-form {
  margin: 0;
}

.gac-content {
  padding: 24px 28px 48px;
  flex: 1;
}

.gac-footer {
  padding: 12px 28px 20px;
  color: var(--gac-muted);
  font-size: 0.85rem;
}

.gac-card,
.panel,
.user-panel {
  background: var(--gac-surface);
  border: 1px solid var(--gac-line);
  border-radius: 14px;
  box-shadow: 0 8px 24px rgba(22, 50, 79, 0.06);
  padding: 20px;
}

.gac-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.gac-metric a {
  display: block;
  padding: 18px;
  border-radius: 12px;
  background: #f8fbf9;
  border: 1px solid var(--gac-line);
  color: inherit;
  text-decoration: none;
}

.gac-metric a:hover {
  border-color: var(--gac-accent);
  text-decoration: none;
}

.gac-metric h2 {
  margin: 0 0 6px;
  font-size: 1rem;
}

.gac-metric p {
  margin: 0;
  color: var(--gac-muted);
}

.table {
  background: #fff;
}

.table thead th {
  border-top: 0;
  color: var(--gac-muted);
  font-weight: 600;
}

.btn-primary {
  background-color: var(--gac-accent);
  border-color: var(--gac-accent);
}

.btn-primary:hover {
  background-color: var(--gac-accent-hover);
  border-color: var(--gac-accent-hover);
}

.gac-pager {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 16px;
}

.gac-pager-info {
  color: var(--gac-muted);
  font-size: 0.9rem;
}

.gac-pager-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.gac-pager-ellipsis {
  padding: 0 4px;
  color: var(--gac-muted);
}

.gac-pager .btn.disabled {
  pointer-events: none;
  opacity: 0.55;
}

.gac-row-link {
  cursor: pointer;
}

.gac-login {
  max-width: 420px;
  margin: 40px auto;
  background: #fff;
  border-radius: 16px;
  padding: 28px;
  border: 1px solid var(--gac-line);
}

.gac-alert {
  background: #fff6e8;
  border: 1px solid #f0d6a8;
  color: #6a4b12;
  border-radius: 10px;
  padding: 12px 14px;
  margin: 0 0 18px;
}

.gac-alert p {
  margin: 6px 0 0;
}

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

  .gac-sidebar {
    padding-bottom: 12px;
  }
}