/* -- Cornerstones -- */

:root {
    --primer-color-base: 255, 255, 255;
    --primer-color-contrast: 0, 0, 0;

    --color-base: rgb(var(--primer-color-base));
    --color-contrast: rgb(var(--primer-color-contrast));

    --padding: 20px;
}

@font-face {
    font-family: "Roboto Mono";
    src:
        local("Roboto Mono"),
        url("../fonts/roboto-mono.woff2") format("woff2"),
        url("../fonts/roboto-mono.ttf") format("ttf");
    font-display: fallback;
}

* {
    margin: 0;
    box-sizing: border-box;
    font-family: "Roboto Mono", "Courier", sans-serif;
    font-size: 20px;
    color: inherit;
}

::selection {
    background-color: var(--color-contrast);
    color: var(--color-base);
}

::placeholder {
    color: rgba(var(--primer-color-contrast), .5);
}

html {
    background-size: cover;
    background-position: 50% 50%;
}

body {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--color-contrast);
    background-color: rgba(var(--primer-color-base), .95);
    gap: var(--padding);
    padding: var(--padding) 0;
    padding-bottom: 30vh;
}

a:not(p > a) {
    text-decoration: none;
}

/* -- Components -- */

input {
    letter-spacing: 5px;
}

input,
.button {
    background-color: var(--color-contrast);
    color: var(--color-base);
    padding: calc(var(--padding) / 2) calc(var(--padding) * 1.5);
    text-align: left;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--padding);
    height: 3em;
}

input,
.button.phantom {
    background-color: transparent;
    border: solid 2px var(--color-contrast);
    color: var(--color-contrast);
}

img,
.button {
    user-select: none;
}

.button :not(p) {
    height: 2em;
}

.interact::before {
    content: "tap ";
}

/* ---- */

.spacer {
    display: grid;
    justify-items: center;
}

body > .spacer {
    margin: var(--padding) 0;
}

.spacer div {
    width: 205px;
    height: 7px;
    background-color: var(--color-contrast);
    transform: rotate(-4deg);
}

/* -- Content -- */

form,
section {
    max-width: 600px;
    margin: var(--padding) calc(var(--padding) * 1.5);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: justify;
    gap: var(--padding);
}

section > *,
section picture > img {
    width: 100%;
}

section#code {
    text-align: center;
}

section#intro {
    max-width: 250px;
    text-align: center;
}

section#contact > div {
    display: grid;
    grid-template-rows: repeat(2, 1fr);
    gap: var(--padding);
}

section#sky .button img {
    height: 50%;
}

section#coffee > img {
    width: 100px;
    margin-bottom: calc(var(--padding) * 2);
}

/* ---- */

.banner {
    width: 100%;
    background-color: rgba(var(--primer-color-contrast), .05);
    text-align: center;
    padding: calc(var(--padding) / 2) 0;
    margin: var(--padding) 0;
}

/* -- Media queries -- */

@media (hover: hover) {
    .button:hover {
        color: var(--color-contrast);
        background-color: transparent;
        border: inset 2px black;
    }

    .button:hover:not(.phantom) :is(img, svg) {
        filter: invert(1);
    }

    .button:active {
        background-color: rgba(var(--primer-color-contrast), .1);
    }

    /* ---- */

    .button.phantom:hover {
        background-color: rgba(var(--primer-color-contrast), .05);
    }

    .button.phantom:active {
        background-color: rgba(var(--primer-color-contrast), .1);
    }
}

@media (pointer: fine) {
    .button {
        cursor: pointer;
    }

    .interact::before {
        content: "click ";
    }
}

@media (prefers-color-scheme: dark) {
    :root {
        --primer-color-base: 0, 0, 0;
        --primer-color-contrast: 255, 255, 255;
    }

    img:not(picture img) {
        filter: invert(1);
    }
}

@media (max-width: 330px) {
    section#sky .button img {
        display: none;
    }
}

@media (min-width: 660px) {
    input,
    .button {
        height: 3.5em;
    }

    section#code {
        display: grid;
        grid-template-columns: 1fr 40px 1fr;
        width: 100%;
    }

    section#contact > div {
        grid-template-rows: 1fr;
        grid-template-columns: repeat(2, 1fr);
    }
}