body {
    margin: 0;
    font-family: Arial, sans-serif;
}

main {
    padding-top: 1.5rem;
}

.site-header {
    background: linear-gradient(90deg, #0f1c3b, #182c59);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
    position: sticky;
    top: 0;
    z-index: 50;
}

.nav-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-btn,
.nav-bar button {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    border: 1px solid rgba(255, 255, 255, 0.35);
    border-radius: 999px;
    padding: 0.35rem 1rem;
    background: rgba(255, 255, 255, 0.08);
    color: #f7f7ff;
    text-decoration: none;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
}

.nav-btn:hover,
.nav-bar button:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.logout-btn {
    background: rgba(255, 87, 87, 0.15);
    border-color: rgba(255, 87, 87, 0.6);
}

.logout-btn:hover {
    background: rgba(255, 87, 87, 0.3);
}