.topnav {
    font-family: var(--font-family);
    font-size: 10px;
    width: 100%;
    background-color: var(--topnav);
    overflow: hidden;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 0;
    flex-shrink: 0;
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    z-index: 1000;
    background: var(--topnav);
    transition: transform 0.3s ease;
    transform: translateY(-100%);
    /* hidden by default */
    will-change: transform;
    padding-inline: 0;
}

.topnav-spacer {
    height: 50px;
}

.topnav.visible {
    transform: translateY(0);
}

.topnav.pinned {
    position: relative;
    transform: none;
}

.topnav .left,
.topnav .right {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.topnav .left {
    padding-left: 0;
}

.topnav a {
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
    font-size: 14px;
    color: var(--fg-contrast);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.topnav a:hover:not(.active) {
    background-color: var(--acc);
}

.topnav a.active {
    background-color: var(--acc);
}

.topnav .center {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    color: var(--fg);
    font-size: 16px;
}

.topnav .site-title {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    color: var(--fg);
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    padding: 0;
    background: transparent !important;
}

.topnav .site-title:hover {
    background: transparent !important;
    opacity: 0.85;
}

.topnav .site-title i {
    color: var(--acc);
}

:root {
    --button-width: 44px;
    --button-height: 24px;
    --toggle-diameter: 18px;
    --button-toggle-offset: 3px;
    --toggle-shadow-offset: 1px;
    --toggle-wider: 26px;
}

.dark-mode-select {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 1rem;
    margin-right: 1rem;
    padding-right: 0.5rem;
    color: var(--fg);
}

.dark-mode-switch {
    position: relative;
    width: var(--button-width);
    height: var(--button-height);
}

.dark-mode-slider {
    position: relative;
    display: inline-block;
    width: var(--button-width);
    height: var(--button-height);
    background-color: rgba(0, 0, 0, .15);
    border-radius: calc(var(--button-height) / 2);
    cursor: pointer;
    transition: background-color .3s ease;
}

.dark-mode-slider::after {
    content: "";
    display: inline-block;
    width: var(--toggle-diameter);
    height: var(--toggle-diameter);
    background-color: var(--bg);
    border-radius: 50%;
    position: absolute;
    top: var(--button-toggle-offset);
    left: var(--button-toggle-offset);
    box-shadow: var(--toggle-shadow-offset) 0 calc(var(--toggle-shadow-offset)*4) rgba(0, 0, 0, .1);
    transition: transform .3s ease, width .2s ease;
}

.dark-mode-switch input[type="checkbox"] {
    position: absolute;
    inset: 0;
    opacity: 0;
}

.dark-mode-switch input[type="checkbox"]:checked+.dark-mode-slider {
    background-color: var(--acc);
}

.dark-mode-switch input[type="checkbox"]:checked+.dark-mode-slider::after {
    transform: translateX(calc(var(--button-width) - var(--toggle-diameter) - var(--button-toggle-offset)*2));
}

.dark-mode-switch input[type="checkbox"]:active+.dark-mode-slider::after {
    width: var(--toggle-wider);
}

.dark-mode-switch input[type="checkbox"]:checked:active+.dark-mode-slider::after {
    transform: translateX(calc(var(--button-width) - var(--toggle-wider) - var(--button-toggle-offset)*2));
}

@media (max-width: 1200px) and (min-width: 901px) {
    .topnav a {
        padding: 12px 10px;
        font-size: 13px;
    }

    .topnav .site-title {
        font-size: 14px;
    }

    .dark-mode-select {
        margin-right: 0.75rem;
        gap: 0.5rem;
    }

    .dark-mode-select p {
        font-size: 12px;
    }
}

@media (max-width: 900px) {
    .topnav {
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
        gap: 0.35rem;
        padding: 0.5rem 0.75rem;
        transform: translateY(0) !important;
    }

    .topnav-spacer {
        height: 110px;
    }

    .topnav .center {
        position: static;
        transform: none;
        display: flex;
        justify-content: center;
        order: -1;
    }

    .topnav .site-title {
        font-size: 0.95rem;
    }

    .topnav .left {
        justify-content: center;
        flex-wrap: wrap;
        width: 100%;
    }

    .topnav a {
        padding: 0.5rem 0.7rem;
        font-size: 13px;
    }

    .topnav .right {
        width: 100%;
        justify-content: center;
        gap: 1rem;
    }

    .dark-mode-select {
        margin-right: 0;
    }
}

@media (max-width: 768px) {
    .topnav a {
        padding: 12px 10px;
        font-size: 12px;
    }

    .topnav .site-title {
        font-size: 14px;
        gap: 0.3rem;
    }
}

@media (max-width: 480px) {
    .topnav {
        padding-inline: 0;
        padding-left: 0;
        padding-right: 0.5rem;
    }

    .topnav .left {
        padding-left: 0;
    }

    .topnav a {
        padding: 10px 8px;
        font-size: 11px;
    }

    .topnav .site-title {
        font-size: 12px;
        gap: 0.2rem;
    }

    .dark-mode-select {
        margin-right: 0.5rem;
    }
}