:root {
    --clr-primary-10: hsl(224 76% 15%);
    --clr-primary-50: hsl(224 76% 26%);
    --clr-white: hsl(0, 100%, 100%);
    --clr-red: hsl(0, 100%, 50%);

    --ff-primary: Arial, Helvetica, sans-serif;
}

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

h1 {
    padding-inline: 0.50em;
    font-size: clamp(0.50rem, 0.50rem + 4vw, 4.00rem);
}

h1,
h2,
h3 {
    margin-bottom: 0.50em;
    color: var(--clr-primary-50);
    text-transform: uppercase;
    text-align: center;
}

h3 {
    text-align: left;
}

a {
    color: var(--clr-primary-10);
}

a:hover {
    opacity: 0.75;
}

a:focus-visible {
    outline: 1px solid var(--clr-primary-10);
}

img {
    display: block;
    width: 100%;
    height: auto;
}

p:not(:last-child) {
    margin-bottom: 0.75em;
}

ul {
    margin-bottom: 1.00em;
    list-style-position: inside;
}

/**
 * Forms
 */
input[type="text"],
input[type="email"],
input[type="tel"],
textarea {
    width: 100%;
    padding-block: 0.25em;
    font-size: 1.00rem;
    font-family: var(--ff-primary);
    text-align: center;
}

label {
    display: block;
    font-size: 1.1em;
}

label:not([data-required="false"])::after {
    content: "*";
    color: var(--clr-red);
}

.button {
    padding-block: 0.50em;
    padding-inline: 1.00em;
    border: 1px solid var(--clr-primary-50);
    border-radius: 100em;
    font-family: var(--ff-primary);
    font-size: 1.00rem;
    background-color: var(--clr-primary-50);
    color: var(--clr-white);
    text-align: center;
    cursor: pointer;
    transition:
        background-color 250ms ease-in-out,
        color 250ms ease-in-out;
}

.button:hover {
    background-color: var(--clr-white);
    color: var(--clr-primary-50);
    opacity: 1;
}

.button:disabled {
    opacity: 0.5;
}

.spinner {
    display: inline-block;
    width: 1.50em;
    height: auto;
    aspect-ratio: 1 / 1;
    margin-block: 0.25em;
}

/**
 * Base layout
 */
.site {
    display: grid;
    grid-template-rows: min-content 1fr min-content;
    grid-template-areas: "header" "main" "footer";
    max-width: 64.00em;
    min-height: 100vh;
    margin-inline: auto;
    font-family: var(--ff-primary);
    color: var(--clr-primary-50);
    line-height: 1.50;
}

.site__main {
    grid-area: main;
    font-size: 1.50rem;
}

.site__main--regular-size {
    font-size: 1.00rem;
}

.site__header {
    position: relative;
    grid-area: header;
}

.site__header .title {
    position: absolute;
    top: 1.00em;
    left: 0;
    right: 0;
    text-align: center;
    color: var(--clr-white);
}

.site__footer {
    grid-area: footer;
    border-top-right-radius: 2.00em;
    border-top-left-radius: 2.00em;
    padding-block: 1.00em;
    margin-top: 2.00em;
    font-size: 1.00rem;
    background-color: var(--clr-primary-50);
    color: var(--clr-white);
    text-align: center;
}

.site__footer a {
    color: var(--clr-white);
}

.place-time {
    display: grid;
    grid-template-columns: 1fr 1fr;
    margin-top: 1.00em;
    text-align: center;
}

.information {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: min-content 1fr;
    margin-top: 1.00em;
    text-align: center;
}

.information h2 {
    grid-column: 1 / 3;
}

.information__additional {
    grid-column: 1 / 3;
    margin-top: 0.50em;
}

.registration {
    margin-top: 1.00em;
    text-align: center;
}

.registration__form {
    margin-top: 1.50em;
    font-size: 1.00rem;
}

.registration__form[aria-hidden="true"] {
    display: none;
    visibility: hidden;
}

.registration__form[aria-hidden="false"] {
    display: block;
    visibility: visible;
}

.registration__form p {
    margin-bottom: 0.25em;
}

.registration__form .wpcf7-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-auto-rows: min-content;
    column-gap: 4.00em;
    text-align: center;
}

.registration__form .wpcf7-form__bottom {
    grid-column: 1 / 3;
    padding-block: 1.00em;
}

.registration__form .wpcf7-spinner {
    display: block;
    margin-inline: auto;
}

.registration__form .wpcf7-response-output {
    grid-column: 1 / 3;
}

@media (max-width: 60em) {
    .site {
        padding-inline: 1.00em;
    }

    .site__header .title {
        top: 0.25em;
    }

    .place-time {
        grid-template-columns: 1fr;
        grid-auto-rows: min-content;
    }

    .information {
        grid-template-columns: 1fr;
        grid-auto-rows: min-content;
    }

    .information h2 {
        grid-column: 1 / 2;
    }

    .information__additional {
        grid-column: 1 / 2;
    }

    .registration__form .wpcf7-form {
        grid-template-columns: 1fr;
        grid-auto-rows: min-content;
    }

    .registration__form .wpcf7-form__bottom {
        grid-column: 1 / 2;
    }

    .registration__form .wpcf7-response-output {
        grid-column: 1 / 2;
    }
}

/**
 * Utilities
 */
[data-align="center"] {
    text-align: center;
}

[data-size="small"] {
    font-size: 0.85em;
}

[data-size="big"] {
    font-size: 1.25em;
}

[data-uppercase="true"] {
    text-transform: uppercase;
}