body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #333;
}

header {
    background: linear-gradient(135deg, #1a252f 0%, #2c3e50 100%);
}

.accordion-button:not(.collapsed) {
    background-color: #e8f5e9;
    color: #1b5e20;
}

section {
    scroll-margin-top: 60px;
}