@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;500;600;700&display=swap');

:root {
	/* Main */
	--red-color: hsl(0, 100%, 74%);
	--green-color: hsl(154, 59%, 51%);

	/* Accent */
	--blue-color: hsl(248, 32%, 49%);

	/* Neutral */
	--dark-blue-color: hsl(249, 10%, 26%);
	--greyish-blue-color: hsl(246, 25%, 77%);

	/* Font */
	--main-font: 'Poppins', sans-serif;
}

* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;

	font-family: var(--main-font);
}

body {
	background: var(--red-color) url(./images/bg-intro-desktop.png);
	background-size: cover;

	font-size: 16px;
}

@media (max-width: 55rem) {
	body {
		background: var(--red-color) url(./images/bg-intro-mobile.png);
	}
}

main {
	min-height: 100vh;
	padding: 5.5rem 1.5rem;

	display: grid;
	align-content: center;
	justify-content: center;

	gap: 3.5rem;
}

@media (min-width: 55rem) {
	main {
		padding: 0rem 9.5rem;
		grid-template-columns: 1fr 1fr;

		gap: 2rem;
	}
}

section h1 {
	font-size: 3rem;
	font-weight: 700;
	line-height: 3.25rem;

	margin-bottom: 1.5rem;
}

.intro__section {
	color: white;

	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
}

@media (max-width: 768px) {
	section h1 {
		font-size: 2em;
		line-height: 2.5rem;
	}

	.intro__section {
		text-align: center;
	}
}

.form__section {
	text-align: center;
}

.form__section > * {
	border: none;
	border-radius: 0.5rem;
	box-shadow: 0 7.5px 0 0 hsla(0, 0%, 0%, 0.15);

	width: 100%;
}

.form__section > button {
	color: white;
	background-color: var(--blue-color);

	margin-bottom: 1.5rem;
	padding: 1rem 5rem;

	transition: all 0.333s ease;

	cursor: pointer;
}
.form__section > button span {
	font-weight: 600;
}

.form__section > button:hover,
.form__section > button:focus {
	transform: translateY(-5px);
}

form {
	background: white;

	padding: 2rem;

	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	gap: 1rem;
}

form .input--group {
	width: 100%;

	position: relative;
}

.input--group input {
	--greyish-blue-color: hsla(246, 25%, 77%, 0.5);

	border: 1px solid var(--greyish-blue-color);
	border-radius: 0.25rem;
	outline: none;

	font-weight: 600;
	caret-color: var(--blue-color);

	width: 100%;
	padding: 0.75rem 2rem;

	transition: border 0.4s ease;
}

.input--group input::placeholder {
	font-weight: 500;
}

.input--group input:hover,
.input--group input:focus {
	border: 1px solid var(--blue-color);
}

.input--group input.invalid {
	border: 2px solid var(--red-color);
	color: var(--red-color);
}

.input--group label.input--error__message {
	color: var(--red-color);
	font-size: 0.75rem;
	font-style: italic;
	float: right;

	opacity: 0;

	transition: opacity 0.4s ease-in;
}
.input--group svg.input--error__icon {
	position: absolute;
	right: 2rem;
	top: calc(50% - 1.25em);

	opacity: 0;

	transition: opacity 0.4s ease-in;
}

.input--group input.invalid ~ label.input--error__message,
.input--group input.invalid ~ svg.input--error__icon {
	opacity: 1;
}

form button {
	background: var(--green-color);
	border: none;
	border-radius: 0.25rem;
	box-shadow: 0 -2px 0px 1px hsla(0, 0%, 0%, 0.15) inset;

	color: white;
	font-weight: 500;
	text-transform: uppercase;

	width: 100%;
	padding: 0.75rem 0;

	transition: all 0.333s ease;

	cursor: pointer;
}

form button:hover,
form button:focus {
	opacity: 0.75;
}

form h5 {
	color: var(--greyish-blue-color);
	font-size: 0.5rem;
	padding: 0 1rem;
}

form h5 a {
	color: var(--red-color);
	text-decoration: none;
}

/* Attribution */
.attribution {
	color: white;
	font-size: 11px;
	text-align: center;

	position: fixed;
	bottom: 0;
	left: 50%;
	transform: translateX(-50%);
}
.attribution a {
	color: hsl(228, 45%, 44%);
}