:root {
    /* --- Color Palette --- */
    --secondary-color: #0048e4;
    --accent-color: #ff0000;
    --background-color: #f4f1ea;
    --background-section-color: #fffdf8;
    --header-h1-text-color: #ffffff;
    --header-h2-text-color: #315c3a;
    --main-text-color: #315c3a;
    --footer-text-color: #ffffff;
    --border-color: #d8cdbb;

    /* --- Fonts Config --- */
    --header-h1-font: "VT323", monospace;
    --main-font: "Source Code Pro", monospace;

    --header-h1-letter-spacing: 2.5px;
    --header-nav-a-letter-spacing: 1px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--main-font);  
    background-color: var(--background-color);
    color: var(--main-text-color);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    line-height: 1.6;
}

/* HEADER */
header {
    display: flex;
    align-items: center;
    gap: 12px 24px;
    justify-content: space-between;
    background-color: var(--secondary-color);
    color: var(--header-h1-text-color);
    padding: 12px 24px;
}

header h1 {
    margin: 0;
    font-family: var(--header-h1-font);
    font-size: clamp(1.5rem, 4vw, 2.25rem);  
    letter-spacing: var(--header-h1-letter-spacing);
    color: var(--header-h1-text-color);
    -webkit-user-select: none;
    user-select: none;

}

.site-nav {
    margin-left: auto;
    align-self: center;
}

.site-nav nav {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.site-nav nav a {
    margin: 0;
    padding: 8px 10px;

    color: var(--header-h1-text-color);
    
    letter-spacing: var(--header-nav-a-letter-spacing);
    font-weight: bold;
    text-decoration: none;
    border-radius: 4px;

    transition: background-color 150ms ease;
}

.site-nav summary {
    display: none;
}

@media (max-width: 600px) {
    header {
        flex-direction: row;
        align-items: center;
        padding: 16px;
    }

    header h1 {
        font-size: clamp(1.5rem, 8vw, 2rem);
    }

    .site-nav {
        position: relative;
        margin-left: auto;
    }

    .site-nav summary {
        display: block;
        padding: 8px 12px;
        color: var(--header-h1-text-color);
        font-weight: bold;
        cursor: pointer;
        border-radius: 4px;
    }

    .site-nav summary:hover,
    .site-nav summary:focus-visible {
        background-color: var(--accent-color);
    }

    .site-nav nav {
        position: absolute;
        top: 100%;
        right: 0;
        z-index: 10;
        display: flex;
        flex-direction: column;
        min-width: 170px;
        margin-top: 8px;
        padding: 8px;
        background-color: var(--secondary-color);
        border: 1px solid var(--border-color);
        border-radius: 8px;
        box-shadow: 0 4px 12px rgb(0 0 0 / 20%);
    }

    .site-nav nav a {
        display: block;
        padding: 12px;
        text-align: left;
    }

    main {
        padding: 16px;
    }

    section {
        padding: 18px;
    }
}

header nav a:hover,
header nav a:focus-visible {
    background-color: var(--accent-color);
}

/* MAIN CONTENT */
main {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: 24px;

    flex: 1;
}

main h1, main h2, main h3, main p {
    margin: 0;
}

main h1, main h2, main h3 {
    line-height: 1.2;
}

main p {
    line-height: 1.7;
}

/* SECTIONS */
section {
    background-color: var(--background-section-color);
    padding: 24px;
    padding-bottom: 12px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    border-top: 4px solid var(--accent-color);
    border-radius: 8px;
}

section h1, section h2, section h3, section p {
    margin-bottom: 15px;
}

section h2 {
    color: var(--header-h2-text-color);
}

.centered h2 {
    text-align: center;
}

/* HERO */
.hero {
    max-width: 900px;
    margin: 0 auto;
}

.hero img {
    margin-top: 25px;
    border-radius: 6px;
}

/* TABLE */
table {
    max-width: 600px;
    width: 100%;
    border-collapse: collapse;
    margin: 10px auto;
}

th, td {
    border: 1px solid var(--main-text-color);
    padding: 8px 12px;
    text-align: center;
}

th {
    background-color: #a8a8a8;
    color: white;
}

td a {
    color: var(--main-text-color);
    text-decoration: underline;
    padding: 4px;
    border-radius: 4px;
    transition: background-color 150ms ease;
}

td a:hover,
td a:focus-visible {
    background-color: var(--accent-color);
    text-decoration: none;
}

/* FOOTER */
footer {
    font-weight: bold;
    text-align: center;
    padding: 2.5px;
    background: var(--secondary-color);
    color: var(--footer-text-color);
}

footer p {
    margin: 0;
}