:root {
    color-scheme: light dark;

    --evergreen: #053225;
    --shadow-gray: #15111A;
    --porcelain: #FDFFFC;
    --atomic-tangerine: #F4743B;
    --mint-leaf: #62A87C;

    --header-bg: var(--evergreen);
    --nav-bg: var(--evergreen);
    --workspace-bg: var(--porcelain);
    --accent1: var(--atomic-tangerine);
    --accent2: var(--mint-leaf);

    --link-unvisited: #0000EE;
    --link-visited: #551ABB;
    --link-active: #FF0000;

    --text-primary: var(--shadow-gray);
    --text-inverse: var(--porcelain);
}

@media (prefers-color-scheme: dark) {
    :root {
        --workspace-bg: var(--shadow-gray);
        --text-primary: var(--porcelain);
        --link-unvisited: var(--accent2);
        --link-visited: color-mix(in srgb, var(--accent2) 50%, var(--accent1) 50%);
        --link-active: var(--accent1);
    }
}

html {
    scrollbar-color: var(--accent1) transparent;
}

body {
    display: grid;
    font-family: Verdana, Geneva, Tahoma, sans-serif;
    margin: 0;
    height: 100dvh;
    overflow: hidden;
    grid-template:
        "a a" auto
        "b c" 1fr / max-content 1fr;
}

header {
    display: flex;
    grid-area: a;
    color: var(--text-inverse);
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--accent1);
}

header h1 {
    width: fit-content;
}

nav {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    grid-area: b;
    color: var(--text-inverse);
    background-color: var(--nav-bg);
    overflow-y: auto;
    scrollbar-color: var(--accent2) transparent;
}

main {
    grid-area: c;
    padding: 1rem;
    background-color: var(--workspace-bg);
    color: var(--text-primary);
    overflow-y: scroll;
    scrollbar-color: var(--accent1) transparent;
}

a.nav {
    padding: 0.5rem 1rem;
    font-size: large;
    color: var(--text-inverse);
    text-decoration: none;
}

a.nav:hover {
    background-color: var(--accent2);
}

a.nav:active {
    background-color: var(--accent1);
}

a.nav:focus {
    outline: 2px solid var(--accent2);
    outline-offset: -2px;
}

input[type="file"]::file-selector-button,
input[type="submit"],
button {
    display: inline-block;
    border: none;
    font-size: large;
    color: var(--text-inverse);
    background-color: var(--accent1);
    text-decoration: none;
    padding: 0.5rem;
    cursor: pointer;
}

input[type="file"]::file-selector-button:hover,
input[type="submit"]:hover,
button:hover {
    filter: brightness(0.8);
}

input[type="file"]::file-selector-button:active,
input[type="submit"]:active,
button:active {
    background-color: var(--accent2);
}

input[type="file"]::file-selector-button:focus,
input[type="submit"]:focus,
button:focus {
    outline: 2px solid var(--accent2);
}

fieldset {
    border: none;
}

input {
    background-color: var(--workspace-bg);
    color: var(--text-primary);
    border: none;
    margin: 0.2rem;
}

input:focus {
    outline: 2px solid var(--accent1);
}

input[type="number"],
input[type="text"] {
    border: 1px solid var(--accent2);
    padding: 0.2rem;
    accent-color: var(--accent1);
}

input[type="checkbox"] {
    appearance: none;
    -webkit-appearance: none;
    width: 1rem;
    height: 1rem;
    background-color: transparent;
    border: 1px solid var(--accent2);
    cursor: pointer;
    display: inline-grid;
    place-content: center;
    margin: 0;
}

input[type="checkbox"]:checked {
    background-color: var(--accent1);
    border-color: var(--accent1);
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 16 16' fill='%23FFFFFF' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M12.207 4.793a1 1 0 010 1.414l-5 5a1 1 0 01-1.414 0l-2-2a1 1 0 011.414-1.414L6.5 9.086l4.293-4.293a1 1 0 011.414 0z'/%3E%3C/svg%3E");
    background-size: 100% 100%;
    background-position: center;
}

input[type="number"]:focus,
input[type="text"]:focus,
input[type="checkbox"]:focus {
    border-color: transparent;
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    appearance: none;
    background-color: var(--accent1);
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 6l4-4 4 4M4 10l4 4 4-4'/%3E%3C/svg%3E");
    -webkit-mask-size: 12px;
    -webkit-mask-repeat: no-repeat;
    -webkit-mask-position: center right 4px;
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='black' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 6l4-4 4 4M4 10l4 4 4-4'/%3E%3C/svg%3E");
    mask-size: 12px;
    mask-repeat: no-repeat;
    mask-position: center right 4px;
    width: 20px;
    bottom: 0;
    top: 0;
    cursor: pointer;
}

label:has(input[type="checkbox"]) {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    width: fit-content;
    cursor: pointer;
}

main a {
    color: var(--link-unvisited);
}

main a:link {
    color: var(--link-unvisited);
}

main a:visited {
    color: var(--link-visited);
}

main a:active {
    color: var(--link-active);
}

#logo {
    display: flex;
    align-items: center;
    padding: 0 1rem;
    gap: 1rem;
    color: var(--text-inverse);
    text-decoration: none;
    width: fit-content;
}

#logo:focus {
    outline: 2px solid var(--accent2);
    outline-offset: -2px;
}

#menu-toggle {
    display: none;
    background: transparent;
    padding: 0 1rem;
    border: none;
    margin-left: auto;
    outline-offset: -2px;
}

#workspace {
    max-width: 800px;
}

@media (max-width: 768px) {
    body {
        grid-template:
            "a" auto
            "b" auto
            "c" 1fr / 1fr;
        overflow-y: scroll;
    }

    main {
        padding: 1rem;
        overflow-y: unset;
    }

    #menu-toggle {
        display: block;
    }

    nav {
        display: none;
        flex-direction: column;
        width: 100%;
        overflow-y: unset;
    }

    nav.open {
        display: flex;
    }

    a.nav {
        padding: 1rem;
        border-bottom: 1px solid var(--accent2);
    }
}