:root {
  --app-bg: #f7f8fa;
  --nav-bg: #10243f;
  --nav-text: #f7f9fc;
  --footer-bg: #e9edf4;
  --footer-text: #4b5870;
}

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

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.top-nav {
  background: linear-gradient(120deg, #0f1f34 0%, var(--nav-bg) 100%);
  color: var(--nav-text);
  box-shadow: 0 2px 12px rgba(10, 18, 32, 0.2);
}

.top-nav__brand {
  color: var(--nav-text);
  font-weight: 700;
  letter-spacing: 0.02em;
}

.top-nav__brand:hover,
.top-nav__brand:focus {
  color: #ffffff;
}

.top-nav__user {
  color: #dce5f3;
  max-width: 40ch;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.92rem;
}

.dropdown-item.active,
.dropdown-item:active {
  background-color: #103766;
}

.card {
  border-radius: 12px;
}

.page-title {
  margin-bottom: 1rem;
}

.app-footer {
  background-color: var(--footer-bg);
  border-top: 1px solid #d7deea;
  color: var(--footer-text);
  padding: 0.85rem 0;
  font-size: 0.9rem;
}