html {
    box-sizing: border-box;
    scrollbar-gutter: stable;
    background-color: var(--bg-dark);
    scroll-behavior: auto;
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

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

html,
body {
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-primary);
    color: var(--text-primary);
    -webkit-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

/* =========================================
   Back to Top
========================================= */

.back-to-top {
    width: 3rem;
    height: 3rem;

    position: fixed;
    right: 1.5rem;
    bottom: 1.5rem;
    z-index: 50;

    display: flex;
    align-items: center;
    justify-content: center;

    padding: 0;

    color: var(--text-light);
    background-color: rgba(20, 20, 21, 0.75);

    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 50%;

    backdrop-filter: blur(8px);

    cursor: pointer;

    opacity: 0;
    visibility: hidden;

    transform: translateY(0.75rem);

    transition:
        opacity 0.3s ease,
        transform 0.3s ease,
        visibility 0.3s ease,
        background-color 0.3s ease;
}

.back-to-top.is-visible {
    opacity: 1;
    visibility: visible;

    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--bg-dark);
}


/* Arrow */

.back-to-top__arrow {
    width: 0.6rem;
    height: 0.6rem;

    border-top: 1px solid currentColor;
    border-left: 1px solid currentColor;

    transform: translateY(0.15rem) rotate(45deg);
}

.booking__button {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
}

.booking__button-icon {
    width: 1rem;
    height: 1rem;
    flex: 0 0 auto;
}