:root {
  color-scheme: light;
  --app-surface: rgba(255, 255, 255, 0.9);
  --app-surface-strong: #ffffff;
  --app-border: rgba(15, 23, 42, 0.08);
  --app-shadow: 0 20px 45px rgba(15, 23, 42, 0.08);
}

[data-bs-theme="dark"] {
  color-scheme: dark;
  --app-surface: rgba(15, 23, 42, 0.82);
  --app-surface-strong: rgba(15, 23, 42, 0.96);
  --app-border: rgba(148, 163, 184, 0.18);
  --app-shadow: 0 20px 45px rgba(2, 6, 23, 0.45);
}

body {
  background:
    radial-gradient(circle at top left, rgba(13, 110, 253, 0.16), transparent 28%),
    linear-gradient(135deg, rgba(248, 250, 252, 0.95), rgba(241, 245, 249, 0.95));
  min-height: 100vh;
}

[data-bs-theme="dark"] body {
  background:
    radial-gradient(circle at top left, rgba(56, 189, 248, 0.16), transparent 28%),
    linear-gradient(135deg, rgba(2, 6, 23, 0.98), rgba(15, 23, 42, 0.96));
}

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

.sidebar-panel {
  width: 280px;
  background: var(--app-surface-strong);
  backdrop-filter: blur(18px);
  border-right: 1px solid var(--app-border);
  box-shadow: 8px 0 30px rgba(15, 23, 42, 0.06);
}

[data-bs-theme="dark"] .sidebar-panel {
  box-shadow: 8px 0 30px rgba(2, 6, 23, 0.35);
}

.sidebar-brand {
  background: linear-gradient(135deg, rgba(13, 110, 253, 0.1), rgba(13, 201, 240, 0.12));
  border: 1px solid var(--app-border);
  border-radius: 1.25rem;
}

.sidebar-nav .nav-link {
  border-radius: 999px;
  color: var(--bs-secondary-color);
  transition: all 0.2s ease;
}

.sidebar-nav .nav-link:hover,
.sidebar-nav .nav-link.active {
  background: rgba(13, 110, 253, 0.12);
  color: var(--bs-primary);
  transform: translateX(3px);
}

.topbar {
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  backdrop-filter: blur(16px);
  box-shadow: var(--app-shadow);
}

.content-card,
.panel-card {
  background: var(--app-surface);
  border: 1px solid var(--app-border);
  box-shadow: var(--app-shadow);
  backdrop-filter: blur(18px);
}

.hero-card {
  background: linear-gradient(135deg, rgba(13, 110, 253, 0.95), rgba(13, 201, 240, 0.9));
  color: white;
}

.hero-card .text-muted {
  color: rgba(255, 255, 255, 0.8) !important;
}

.form-control,
.form-select,
textarea {
  border-radius: 0.9rem;
  border-color: rgba(148, 163, 184, 0.35);
  box-shadow: none;
}

.form-control:focus,
.form-select:focus,
textarea:focus {
  border-color: var(--bs-primary);
  box-shadow: 0 0 0 0.2rem rgba(13, 110, 253, 0.15);
}

.table thead th {
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.badge {
  letter-spacing: 0.03em;
}

.modal-content {
  border: 1px solid var(--app-border);
  box-shadow: var(--app-shadow);
}

@media (max-width: 767.98px) {
  .sidebar-panel {
    width: 100%;
  }

  .topbar {
    border-radius: 1rem;
  }
}