.redflag-logo {
    width: 100px;
}

:root {
    --sidebar-width: 210px;
    --sidebar-collapsed-width: 60px;
    --sidebar-menu-height: 200px;

    --sidebar-bg: #436075;
    --sidebar-text: #fff;
    --sidebar-link-bg-hover: #09511e;

    --primary-bg: rgba(234, 240, 247, 1);
}

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

html {
    scroll-behavior: smooth;
    height: 100%;
}

body {
    margin: 0;
    font-family: 'Roboto', sans-serif;
    line-height: 1.5;
    color: #333;
    height: 100%;
    background-color: var(--primary-bg);

}

.sidebar {
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 60px;
    display: flex;
    align-items: center;
    padding: 0;
    background-color: var(--sidebar-bg);
    color: var(--sidebar-text);
    z-index: 1000;
    transition: width 0.3s ease;
}

.hamburger {
    background: transparent;
    border: none;
    cursor: pointer;
    outline: none;
    display: block;
    padding: 0.5rem;
    margin-right: 0.5rem;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--sidebar-text);
    margin: 5px 0;
    transition: transform 0.3s, opacity .3s;
}

.sidebar.open .hamburger span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.sidebar.open .hamburger span:nth-child(2) {
    opacity: 0;
}

.sidebar.open .hamburger span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

.nav-links {
    list-style: none;
    margin: 0;
    padding: 0;

    position: absolute;
    top: 60px;
    left: 0;
    width: var(--sidebar-width);

    background-color: var(--sidebar-bg);
    display: flex;
    flex-direction: column;

    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease-out;
}

.sidebar.open .nav-links {
    max-height: 400px;
    transition: max-height .34s ease-in;
}

.sidebar.open + .page-content {
    margin-top: calc(var(--sidebar-menu-height, 200px) + 60px);
    transition: margin-top .34s ease-in;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    width: 100%;
    padding: 0.5rem;
    margin-bottom: 0.1rem;
    color: var(--sidebar-text);
    text-decoration: none;
    white-space: nowrap;
    border-top-right-radius: 2rem;
    border-bottom-right-radius: 2rem;
    transition: background .15s ease;
}

.nav-link:hover,
.nav-link:focus {
    background-color: var(--sidebar-link-bg-hover);
}

.nav-link i {
    width: 1.25rem;
    text-align: center;
}

.page-content {
    margin-left: 0;
    margin-top: 0;
    transition: margin-left .3s ease, margin-top .3s ease;
    height: 100vh;
    overflow-y: auto;
}

@media (min-width: 768px) {
    .page-content {
        margin-left: var(--sidebar-width);
        margin-top: 0 !important;
    }

    .sidebar.collapsed + .page-content {
        margin-left: var(--sidebar-collapsed-width);
    }

    /* When hovering a collapsed sidebar, shift the page content like expanded state */
    .sidebar.collapsed:has(li:hover) + .page-content {
        margin-left: var(--sidebar-width);
    }

    .sidebar {
        flex-direction: column;
        width: var(--sidebar-width);
        position: fixed;
        height: 100vh;
        padding-top: 1rem;
    }

    .hamburger {
        margin: unset;
        align-self: flex-start;
        border-radius: 2rem;
        margin-left: 0.52rem;
    }

    .hamburger:hover {
        background-color: var(--sidebar-link-bg-hover);
    }

    .nav-links {
        flex: 1 1 auto;
        width: 100%;
        position: static;
        overflow: visible;
        max-height: none;
        font-size: 0.875rem;
    }

    .nav-link {
        display: flex;
        align-items: center;
        min-height: 2.5rem;
        padding-left: 1rem;
    }

    .page-content {
        margin-top: unset;
    }

    .sidebar.collapsed {
        width: var(--sidebar-collapsed-width);
    }

    .sidebar.collapsed:has(li:hover) {
        width: var(--sidebar-width);
        position: fixed;
    }

    .sidebar.collapsed:has(li:hover) .nav-link span {
        opacity: 1;
        visibility: visible;
        width: initial;
    }

    .sidebar:not(.collapsed) .hamburger span:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .sidebar:not(.collapsed) .hamburger span:nth-child(2) {
        opacity: 0;
    }

    .sidebar:not(.collapsed) .hamburger span:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .sidebar.collapsed .nav-link {
        gap: 0;
        padding: 0.5rem;
        padding-left: 1rem;
    }

    .sidebar.collapsed:has(li:hover) .nav-link {
        gap: 0.75rem;
    }

    .sidebar .nav-link span {
        opacity: 1;
        transition: opacity 0.5s ease;
    }

    .sidebar.collapsed .nav-link span {
        opacity: 0;
        visibility: hidden;
        width: 0;
        overflow: hidden;
        white-space: nowrap;
    }

    .logo-container {
        height: 6rem;
        display: flex;
        align-items: flex-end;
        cursor: pointer;
    }

    .redflag-logo {
        display: block;
        border-radius: 2rem;
        height: fit-content;
        margin: 0 auto 1rem auto;
        width: 4rem;
        transition: width 0.3s ease;
    }

    .sidebar.collapsed .redflag-logo {
        width: 2rem;
    }

    .sidebar.collapsed:has(li:hover) .redflag-logo {
        width: 4rem;
        transition: width 0.3s ease;
    }
}