:root {
    --primary: #2563eb;
    --primary-dark: #1e40af;
    --accent: #10b981;
}

body {
    margin: 0;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
}

/* Skip link for keyboard/screen reader users.
   Hidden off-screen until focused, then appears at top of page.
   Allows users to bypass repetitive header navigation. */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: white;
    padding: 8px 16px;
    z-index: 1100;
    text-decoration: none;
    font-weight: 500;
}

.skip-link:focus {
    top: 0;
}

.btn-oauth {
    background-color: var(--primary);
    border-color: var(--primary);
    color: white;
}

.btn-oauth:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
    color: white;
}

.footer-link {
    color: #6b7280;
    text-decoration: none;
}