/* Bottom navigation bar */
.bottom-nav {
    position: fixed;
    bottom: 1rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    width: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
}

.audio-drag-pill {
    font-family: var(--app-font-family, Arial, Helvetica, sans-serif);
    font-size: 1.05rem;
    line-height: 1;
    padding: 0.58rem 1.4rem;
    border-radius: 999px;
    border: 2px solid rgba(236, 236, 236, 0.9);
    background: transparent;
    color: #f4f4f4;
    letter-spacing: 0.03em;
    text-transform: lowercase;
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.3);
    transition: transform 0.45s cubic-bezier(0.19, 1, 0.22, 1), opacity 0.3s ease;
    transform: translateY(120%);
    opacity: 0;
    pointer-events: none;
    white-space: nowrap;
}

.bottom-nav.audio-pill-visible .audio-drag-pill {
    transform: translateY(-0.8rem);
    opacity: 1;
}

/* Navigation list container */
.bottom-nav ul {
    display: flex;
    gap: 2rem;
    list-style: none;
    align-items: center;
    position: relative;
    margin: 0;
    padding: 0;
    transition: opacity 0.4s ease, transform 0.45s cubic-bezier(0.19, 1, 0.22, 1);
}

/* Navigation list items */
.bottom-nav li {
    display: flex;
    align-items: center;
    transition: opacity 0.35s ease;
}

/* Vertical divider lines between nav items */
.bottom-nav li:not(:last-child)::after {
    content: '';
    height: 1rem;
    width: 1px;
    background-color: #808080;
    margin-left: 2rem;
    transition: opacity 0.35s ease;
}

/* Navigation links */
.bottom-nav a {
    color: white;
    text-decoration: none;
    font-size: 1.2rem;
    font-family: var(--app-font-family, Arial, Helvetica, sans-serif);
    transition: opacity 0.3s ease;
}

/* Hover effect for navigation links */
.bottom-nav a:hover {
    opacity: 0.7;
}

/* Active navigation state */
.bottom-nav a.active {
    opacity: 1;
    color: #ffffff;
}

/* Navigation sliding line */
.nav-line {
    position: absolute;
    bottom: -0.5rem;
    height: 2px;
    background-color: white;
    transition: left 0.3s ease, width 0.3s ease, opacity 0.3s ease;
    left: 0;
    width: 0;
    border-radius: 1px;
    opacity: 1;
}

.scroll-prompt {
    position: absolute;
    inset: 0; /* fills nav; allows perfect centering */
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    font-family: var(--app-font-family, Arial, Helvetica, sans-serif);
    color: #f4f4f4;
    text-transform: lowercase;
    font-size: 1.2rem;
    letter-spacing: 0;
    opacity: 0;
    transition: opacity 0.4s ease;
    pointer-events: none;
}

.scroll-prompt__indicator {
    display: none;
}

.bottom-nav--prompt-active ul {
    visibility: visible; /* keep layout */
}
.bottom-nav--prompt-active ul li {
    opacity: 0; /* fade links out while preserving space */
    pointer-events: none;
}
.bottom-nav--prompt-active ul li:not(:last-child)::after {
    opacity: 0; /* fade out dividers */
}
.bottom-nav ul::after {
    content: 'scroll down';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    color: #f4f4f4;
    font-family: var(--app-font-family, Arial, Helvetica, sans-serif);
    font-size: 1.2rem;
    letter-spacing: 0;
    opacity: 0;
    transition: opacity 0.35s ease;
}
.bottom-nav--prompt-active ul::after { opacity: 1; }
.bottom-nav.bottom-nav--prompt-active .audio-drag-pill {
    opacity: 0;
    transform: translateY(16px);
    pointer-events: none;
}

.bottom-nav--prompt-active .nav-line {
    opacity: 0;
}

.bottom-nav--prompt-active .scroll-prompt {
    display: none; /* use ul::after for prompt state */
}