@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@400;700&display=swap');

body {
    margin: 0;
    padding: 0;
    font-family: 'Montserrat', sans-serif;
    scroll-behavior: smooth;
}

header, section, footer {
    min-height: 50vh;
}

.back-to-top {
    display: none;
    transition: opacity 0.3s;
    z-index: 1000;
    opacity: 0.8;
}

.back-to-top:hover {
    opacity: 1;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2.5rem;
    }
    section {
        padding: 2rem 1rem;
    }
}