*, *::before, *::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: #fafaf9;
}

::-webkit-scrollbar-thumb {
    background: #d4c5b5;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #b8a494;
}

::selection {
    background: #d95a30;
    color: #fefcf8;
}

.scroll-reveal {
    opacity: 1;
    transform: none;
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

@media (prefers-reduced-motion: no-preference) {
    .scroll-reveal {
        opacity: 0;
        transform: translateY(24px);
    }

    .scroll-reveal.revealed {
        opacity: 1;
        transform: translateY(0);
    }
}

#site-header.scrolled {
    box-shadow: 0 1px 12px rgba(0, 0, 0, 0.08);
}

#mobile-menu {
    animation: slideDown 0.25s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

#back-to-top.visible {
    opacity: 1;
    pointer-events: auto;
}

#back-to-top:not(.visible) {
    opacity: 0;
    pointer-events: none;
    transform: translateY(8px);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#back-to-top.visible {
    transform: translateY(0);
}