:root {
  --app-bg: #12141c;
  --app-surface: #1a1d29;
  --app-border: #2a2e3d;
}

body {
  background-color: var(--app-bg);
}

.app-shell {
  min-height: 100vh;
}

.sidebar {
  width: 260px;
  min-width: 260px;
  background-color: var(--app-surface);
  border-right: 1px solid var(--app-border);
  min-height: 100vh;
}

.sidebar .brand {
  color: #fff;
}

.sidebar .nav-link {
  color: #b6bac6;
  border-radius: 8px;
  font-weight: 500;
}

.sidebar .nav-link:hover {
  background-color: rgba(255, 255, 255, 0.06);
  color: #fff;
}

.sidebar .nav-link.active {
  background-color: #1877f2;
  color: #fff;
}

.main-content {
  min-width: 0;
}

.card {
  background-color: var(--app-surface);
  border: 1px solid var(--app-border);
}

.login-page {
  min-height: 100vh;
  background: radial-gradient(circle at top, #1a1d29 0%, #0e0f16 100%);
}

.login-card {
  width: 100%;
  max-width: 380px;
  background-color: var(--app-surface);
  border: 1px solid var(--app-border);
}

table code {
  color: #9aa3ff;
}

.keyword-thumb {
  height: 160px;
  object-fit: cover;
  border-bottom: 1px solid var(--app-border);
}

.keyword-form-preview {
  max-width: 100%;
  max-height: 180px;
  border-radius: 6px;
  border: 1px solid var(--app-border);
}

.group-links-list {
  max-height: 160px;
  overflow-y: auto;
  padding-left: 1.2rem;
  font-size: 0.85rem;
  min-width: 260px;
}

@media (max-width: 768px) {
  .app-shell {
    flex-direction: column;
  }
  .sidebar {
    width: 100%;
    min-width: 100%;
    min-height: auto;
  }
}