:root {
    --nav-height: 80px;
    --nav-mobile-height: 68px;
    --nav-panel: #141d28;
    --nav-panel-light: #1c2938;
    --nav-text: #ffffff;
    --nav-accent: #4da0ff;
    --font-size-nav: 20px;
    --font-size-page-title: 44px;
    --font-size-section-title: 36px;
    --font-size-body: 28px;
}

html {
    scroll-padding-top: calc(var(--nav-height) + 24px);
}

body {
    min-width: 0;
    overflow-x: hidden;
}

#navbar {
    position: fixed;
    inset: 0 0 auto;
    z-index: 9999;
    display: flex;
    width: 100%;
    height: var(--nav-height);
    box-sizing: border-box;
    align-items: center;
    justify-content: space-between;
    padding: 0 58px;
    background: var(--nav-panel);
}

#navbar .logo {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    color: var(--nav-text);
    font-family: "Raleway", sans-serif;
    font-size: var(--font-size-nav);
    font-weight: 400;
    text-decoration: none;
    transition: color 0.2s ease;
}

#navbar .logo:hover,
#navbar .logo:focus-visible,
#navbar .nav-link:hover,
#navbar .nav-link:focus-visible,
#navbar .nav-group-toggle:hover,
#navbar .nav-group-toggle:focus-visible {
    color: var(--nav-accent);
}

#navbar .logo:focus-visible,
#navbar .nav-link:focus-visible,
#navbar .nav-group-toggle:focus-visible,
#navbar .menu-toggle:focus-visible {
    outline: 2px solid var(--nav-accent);
    outline-offset: 4px;
}

#navbar .menu-toggle {
    display: none;
    width: 44px;
    height: 44px;
    padding: 10px;
    border: 0;
    border-radius: 6px;
    background: transparent;
    color: var(--nav-text);
    cursor: pointer;
}

#navbar .menu-toggle-bar {
    display: block;
    width: 24px;
    height: 2px;
    margin: 5px 0;
    border-radius: 2px;
    background: currentColor;
    transition: transform 0.25s ease, opacity 0.2s ease;
}

#navbar .nav-menu {
    display: block;
}

#navbar .nav-links {
    display: flex;
    align-items: center;
    gap: 0;
    margin: 0;
    padding: 0;
    list-style: none;
}

#navbar .nav-item {
    position: relative;
    width: 120px;
    margin: 0;
    padding: 10px 30px;
    text-align: center;
    list-style: none;
}

#navbar .nav-link,
#navbar .nav-group-toggle {
    display: inline-flex;
    width: 100%;
    min-height: 0;
    box-sizing: border-box;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--nav-text);
    font-family: "Raleway", sans-serif;
    font-size: var(--font-size-nav);
    font-weight: 400;
    line-height: 1.2;
    text-decoration: none;
    cursor: pointer;
    transition: color 0.2s ease, background-color 0.2s ease;
}

#navbar .nav-chevron {
    display: block;
    width: 7px;
    height: 7px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: translateY(-2px) rotate(45deg);
    transition: transform 0.2s ease;
}

#navbar .nav-dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    display: block;
    width: max-content;
    min-width: 190px;
    margin: 0;
    padding: 8px;
    border: 1px solid rgb(255 255 255 / 10%);
    border-radius: 8px;
    background: var(--nav-panel-light);
    box-shadow: 0 12px 30px rgb(0 0 0 / 22%);
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translate(-50%, -6px);
    pointer-events: none;
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
}

#navbar .nav-dropdown li {
    width: auto;
    margin: 0;
    padding: 0;
    text-align: center;
}

#navbar .nav-dropdown a {
    display: block;
    padding: 14px 14px;
    border-radius: 5px;
    color: var(--nav-text);
    font-family: "Raleway", sans-serif;
    font-size: var(--font-size-nav);
    line-height: 1.3;
    text-decoration: none;
    transition: color 0.2s ease, background-color 0.2s ease;
}

#navbar .nav-dropdown a:hover,
#navbar .nav-dropdown a:focus-visible {
    background: rgb(255 255 255 / 8%);
    color: var(--nav-accent);
    outline: none;
}

#navbar .nav-item--dropdown:hover .nav-dropdown,
#navbar .nav-item--dropdown:focus-within .nav-dropdown,
#navbar .nav-item--dropdown.is-open .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translate(-50%, 0);
    pointer-events: auto;
}

#navbar .nav-item--dropdown:hover .nav-chevron,
#navbar .nav-item--dropdown:focus-within .nav-chevron,
#navbar .nav-item--dropdown.is-open .nav-chevron {
    transform: translateY(2px) rotate(225deg);
}

@media (max-width: 768px) {
    :root {
        --nav-height: var(--nav-mobile-height);
        --font-size-nav: 17px;
        --font-size-page-title: 32px;
        --font-size-section-title: 28px;
        --font-size-body: 18px;
    }

    html {
        scroll-padding-top: calc(var(--nav-mobile-height) + 16px);
    }

    #navbar {
        height: var(--nav-mobile-height);
        padding: 0 20px;
    }

    #navbar .logo {
        font-size: 18px;
    }

    #navbar .menu-toggle {
        display: block;
        flex: 0 0 auto;
    }

    #navbar .menu-toggle[aria-expanded="true"] .menu-toggle-bar:nth-child(1) {
        transform: translateY(7px) rotate(45deg);
    }

    #navbar .menu-toggle[aria-expanded="true"] .menu-toggle-bar:nth-child(2) {
        opacity: 0;
    }

    #navbar .menu-toggle[aria-expanded="true"] .menu-toggle-bar:nth-child(3) {
        transform: translateY(-7px) rotate(-45deg);
    }

    #navbar .nav-menu {
        position: fixed;
        inset: var(--nav-mobile-height) 0 auto;
        max-height: 0;
        overflow: hidden;
        border-top: 1px solid rgb(255 255 255 / 10%);
        background: var(--nav-panel);
        box-shadow: 0 14px 30px rgb(0 0 0 / 18%);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: max-height 0.3s ease, opacity 0.2s ease, visibility 0.3s;
    }

    #navbar .nav-menu.is-open {
        height: auto;
        max-height: calc(100dvh - var(--nav-mobile-height));
        overflow-y: auto;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    #navbar .nav-links {
        display: flex;
        flex-direction: column;
        align-items: stretch;
        justify-content: flex-start;
        gap: 0;
        padding: 10px 16px 18px;
    }

    #navbar .nav-item {
        width: 100%;
        padding: 0;
    }

    #navbar .nav-link,
    #navbar .nav-group-toggle {
        width: 100%;
        min-height: 48px;
        justify-content: space-between;
        padding: 12px 10px;
        border-radius: 6px;
        font-size: var(--font-size-nav);
        text-align: left;
    }

    #navbar .nav-chevron {
        display: block;
    }

    #navbar .nav-link:hover,
    #navbar .nav-link:focus-visible,
    #navbar .nav-group-toggle:hover,
    #navbar .nav-group-toggle:focus-visible {
        background: rgb(255 255 255 / 7%);
    }

    #navbar .nav-dropdown {
        position: static;
        left: auto;
        display: none;
        width: 100%;
        min-width: 0;
        box-sizing: border-box;
        overflow: visible;
        margin: 0;
        padding: 0 10px;
        border: 0;
        border-radius: 0;
        background: transparent;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none !important;
        pointer-events: none;
        transition: none;
    }

    #navbar .nav-item--dropdown:hover .nav-dropdown,
    #navbar .nav-item--dropdown:focus-within .nav-dropdown {
        display: none;
        padding-top: 0;
        padding-bottom: 0;
        pointer-events: none;
    }

    #navbar .nav-item--dropdown.is-open .nav-dropdown,
    #navbar .nav-item--dropdown.is-open:hover .nav-dropdown,
    #navbar .nav-item--dropdown.is-open:focus-within .nav-dropdown {
        display: block;
        padding-top: 2px;
        padding-bottom: 8px;
        pointer-events: auto;
    }

    #navbar .nav-dropdown li {
        display: block;
        width: 100%;
    }

    #navbar .nav-dropdown a {
        display: flex;
        width: 100%;
        min-height: 48px;
        box-sizing: border-box;
        align-items: center;
        justify-content: flex-start;
        padding: 12px 14px;
        color: #ffffff;
        opacity: 1;
        visibility: visible;
        font-size: var(--font-size-nav);
        line-height: 1.4;
        text-align: left;
    }

    #navbar .nav-dropdown a:hover,
    #navbar .nav-dropdown a:focus-visible {
        color: var(--nav-accent);
    }

    #contents {
        width: 100%;
        box-sizing: border-box;
        padding-top: calc(var(--nav-mobile-height) + 28px);
        padding-right: 20px;
        padding-left: 20px;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-page-title: 24px;
        --font-size-section-title: 22px;
        --font-size-body: 16px;
    }

    #navbar {
        padding: 0 14px 0 16px;
    }

    #navbar .logo {
        font-size: 17px;
    }

    #navbar .nav-links {
        padding-right: 10px;
        padding-left: 10px;
    }

    #contents {
        padding-top: calc(var(--nav-mobile-height) + 20px);
        padding-right: 16px;
        padding-bottom: 32px;
        padding-left: 16px;
    }
}

@media (prefers-reduced-motion: reduce) {
    #navbar *,
    #navbar *::before,
    #navbar *::after {
        scroll-behavior: auto !important;
        transition-duration: 0.01ms !important;
    }
}