:root {
    --color-bg: #fff;
    --color-bg-alternate: #f0f0f5;
    --color-bg-alternate-hover: #eaeaf4;
    --color-text: #030303;
    --color-primary: #3366ee;
    --color-primary-hover: #2050d3; 
    --color-success: #016630;
    --color-success-hover: #005924;

    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;

    --base-fs: 14px;
}

* {
    box-sizing: border-box;
    font-family: sans-serif;
}

html {
    font-size: var(--base-fs);
}

body {
    margin: 0;
    background-color: var(--color-bg);
    color: var(--color-text);

    > header {
        padding: var(--space-2) var(--space-4);
        border-bottom: 2px solid var(--color-bg-alternate);
        
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        a.logo {
            font-weight: bold;
        }

    }
}

a {
    text-decoration: none;
    color: inherit;

    &:hover {
        text-decoration: underline;
    }
}

ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    gap: var(--space-2);
}

h1.error {
    margin: var(--space-4) 0 0;
    text-align: center;
}