estilo.css

@import url('https://fonts.googleapis.com/css?family=Roboto:300,400,500,700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Oswald:wght@300&display=swap');

:root {
	--background: #1e293b;
	--blue: #08bcff;
	--darkBlue: #2084a8;
}

*:active {
	outline: none;
}

body {
	background-color: var(--background);
	color: #fff;
	font-family: 'Roboto', sans-serif;
}

a {
	text-decoration: none;
	color: #fff;
	transition: all .2s ease-in-out;
}

a:hover {
	color: var(--blue);
}

h1,
h2 {
	font-family: 'Oswald', sans-serif;
}

button {
	border-radius: .25rem;
	padding: 1rem;
	margin-top: 1rem;
	background: none;
	border: 2px solid var(--blue);
	color: white;
	font-weight: bolder;
	transition: all 250ms;
}

button:hover {
	background-color: var(--blue);
}

button:active {
	transform: scale(.985);
}

input,
textarea {
	padding: .3rem;
	border-radius: .35rem;
	border: 2px solid var(--blue);
}

input:invalid:not(:placeholder-shown) {
	border: 2px solid red;
}

.container {
	margin: 0 auto;
	max-width: 1200px;
}

#header {
	/* wtf */
	background-color: #161e2e;
	/* Some slight shadow just for the bottom */
	box-shadow: 0 10px 30px 10px rgb(0 0 0 / 50%);
	border-bottom: 1px solid rgba(255, 255, 255, .1);
}

/* Basically just for the navigation */
header {
	padding: 1rem;
	display: flex;
	justify-content: space-between;
	align-items: center;
}

#logo {
	max-width: 10rem;
}

nav {
	display: none;
}

nav>ul {
	display: none;
	margin: 0;
	padding: 0;
	display: flex;
	list-style: none;
	text-transform: uppercase;
	font-weight: bold;
}

nav>ul>li {
	margin-left: 1rem;
	letter-spacing: .1rem;
	transition: all .2s ease-in-out;
}

nav>ul>li:first-child {
	margin-left: 0;
}

/* On hovering the LI, translate Y a bit for the anchor */
nav>ul>li:hover {
	transform: translateY(-2px);
}

#call {
	padding: .5rem 1rem;
	border-radius: .25rem;
	border: 2px solid var(--blue);
	font-weight: bolder;
	text-transform: uppercase;
	/* Vertical align elements just to make the phone look more centered */
	display: flex;
	align-items: center;
	animation: bounce .5s ease-in-out infinite alternate;
}

#call:hover {
	background-color: #0a7fa3;
	color: #fff;
	/* It's an anchor, so it will inherit the color by default */
}

#call i {
	height: 1rem;
	margin-right: .5rem;
}

/* Animation for the call button */
@keyframes bounce {
	from {
		transform: translateY(-2px);
	}

	to {
		transform: translateY(2px);
	}
}

#hero {
	padding: 1rem;
	height: 14rem;
	/* background-image: url('imagens/hero.webp'); */
	background-repeat: no-repeat;
	background-position: center;
	background-size: cover;
	display: flex;
	align-items: center;
	/* Just a slight inset shadow */
	box-shadow: inset 0 10px 30px 10px rgba(0, 0, 0, .5);
	text-shadow: 1px 2px 3px rgb(0 0 0);
}

#hero-text>h1 {
	font-size: 2rem;
	font-weight: 400;
	margin: 0;
	margin-bottom: .5rem;
	text-transform: uppercase;
}

#hero-text>h1>span {
	font-weight: 600;
}

#hero-text>p {
	font-size: 1rem;
	font-weight: 500;
	margin: 0;
}

#fileservice {
	font-weight: 500;
	border: 2px solid var(--blue);
	border-radius: .5rem;
	padding: 1rem;
	text-align: center;
	margin: 1rem;
	box-shadow: 0 0 10px 2px #08bdff48;
	transition: all .2s ease-in-out;
}

#fileservice>div {
	background-color: rgba(0, 0, 0, .2);
	border-radius: 15px;
	padding: 1rem .5rem;
}

#fileservice div:hover { cursor: default; }

#fileservice img {
	height: 64px;
	filter: invert(78%) sepia(42%) saturate(7483%) hue-rotate(162deg) brightness(100%) contrast(103%) drop-shadow(0 0 10px var(--blue));
}

#fileservice:hover { cursor: pointer; }

#fileservice > div > form > div {
	margin: 1rem 0;
	display: flex;
	flex-wrap: wrap;
	gap: 1rem;
	align-items: center;
	justify-content: center;
}

#fileservice div > form > div:nth-child(3) label { 	margin-left: .25rem; }

#message { 	width: 100%; }

.hero-cards {
	display: flex;
	flex-wrap: wrap;
	justify-content: space-between;
	margin-top: 1rem;
}

.hero-cards .card {
	text-align: center;
	padding: 1rem;
	border-radius: .5rem;
	background-color: #161e2e;
	border: 2px solid var(--blue);
	margin: 1rem 1rem;
	/* Vertical align elements */
	display: flex;
	flex-direction: column;
	align-items: center;
	transition: all .2s ease-in-out;
	cursor: pointer;
}

.hero-cards .card img {
	height: 64px;
	margin-bottom: 1rem;
	filter: invert(78%) sepia(42%) saturate(7483%) hue-rotate(162deg) brightness(100%) contrast(103%) drop-shadow(0 0 10px var(--blue));
}

.hero-cards .card>h2 {
	/* font-size: 1.2rem; */
	font-weight: 500;
	margin: 0 0 .5rem 0;
	text-transform: uppercase;
}

.hero-cards .card>p {
	font-size: .9rem;
	font-weight: 300;
	margin: 0;
}

#fileservice:hover,
.hero-cards .card:hover {
	transform: translateY(-2px);
	/* Drop shadow */
	/* box-shadow: 0 10px 30px 10px rgb(0 0 0 / 20%); */
	/* Very subtle glow using the same border color */
	box-shadow: 0 0 10px 2px var(--blue);
	/* Remove text color */
	color: white;
}

#fileservice:hover img,
.hero-cards .card:hover img {
	filter: invert(100%) sepia(0%) saturate(0%) hue-rotate(0deg) brightness(100%) contrast(100%) drop-shadow(0 0 10px var(--blue));
}

#company-info .container {
	display: flex;
	flex-wrap: wrap;
	flex-direction: column;
	justify-content: space-evenly
}

#company-info .container>div {
	padding: 0 1rem;
	max-width: 100%;
	text-align: center;
	/* Align vertically */
	display: flex;
	flex-direction: column;
	justify-content: center;
}

#company-info .container>div>h2 { margin: 1rem 0 0 0; }

footer {
	padding: 1rem;
	text-align: center;
	font-size: .8rem;
	background-color: #161e2e;
	color: rgba(255, 255, 255, .5);
	border-top: 1px solid rgba(255, 255, 255, .1);
}

footer>.container>div i {
	font-size: 1.3rem;
	margin-right: .5rem;
}

/* Remove margin from the last child */
footer>.container>div:last-child { margin-bottom: 0; }

#whatsapp {
	/* WhatsApp Green */
	color: #25d366;
	display: none;
	opacity: 0;
	position: fixed;
	bottom: 1rem;
	right: 1rem;
	z-index: 100;
	font-size: 2rem;
	animation: grow .5s ease-in-out infinite alternate;
	transition: all .5s ease-in-out;
}

/* Underglow */
#whatsapp:hover {
	filter: drop-shadow(0 0 10px #25d366);
}

/* Rules for bigger screens */
@media (min-width: 768px) {
	#header { padding-bottom: 1rem; }

	#logo { max-width: 15rem; }

	nav { display: flex; }

	#hero {
		height: 20rem;
		border-radius: .5rem;
		border: 2px solid var(--blue);
	}

	#hero>h1 { font-size: 2.7rem; }

	#hero-text {
		margin-left: 10rem;
		font-size: 20rem;
	}

	#fileservice { margin: 2rem 15rem 1rem; }

	.hero-cards { flex-wrap: nowrap; }

	.hero-cards .card { max-width: 20%; }

	.hero-cards .card:first-child { margin-left: 0; }

	.hero-cards .card:last-child { margin-right: 0; }

	#company-info .container {
		flex-wrap: nowrap;
		flex-direction: row;
	}

	#company-info .container>div { padding: 1rem 1rem; }

	dialog { max-width: 50vw; }
}

dialog {
	background: var(--background);
	color: white;
	border: 2px solid var(--blue);
	border-radius: .25rem;
	box-shadow: 0 0 10px 2px #08bdff48;
	transition: all 1s;
	padding: 1rem;
	text-align: center;
}

/* dialog:hover {
	outline: none;
	box-shadow: 0 0 20px 10px #08bdff48;
} */

dialog::backdrop {
	background: rgba(0, 0, 0, .6);
	opacity: 0;
}

dialog[open] {
	animation: slide-up 1000ms forwards, fade-in 500ms forwards;
}

dialog[open]::backdrop {
	animation: fade-in 500ms forwards;
}

dialog[closing] {
	display: block;
	pointer-events: none;
	inset: 0;
	animation: fade-out 500ms forwards;
}

dialog>p {
	font-weight: bolder;
	font-size: 1rem;
}

dialog>div:first-child {
	position: absolute;
	top: 10px;
	right: 10px;
	width: 20px;
	height: 20px;
	cursor: pointer;
	background-color: transparent;
}

dialog>div:first-child::before,
dialog>div:first-child::after {
	content: '';
	position: absolute;
	width: 2px;
	height: 30px;
	background-color: var(--blue);
	top: 0;
	left: 50%;
	transform: translateX(-50%);
	transition: background-color 500ms;
}

dialog>div:first-child::before {
	transform: translateX(-50%) rotate(45deg);
}

dialog>div:first-child::after {
	transform: translateX(-50%) rotate(-45deg);
}

dialog>div:first-child:hover::before,
dialog>div:first-child:hover::after {
	background-color: var(--darkBlue);
}

dialog>div:nth-child(2) {
	display: flex;
	flex-direction: row;
	align-items: center;
	text-align: center;
	/* Center the content of the second div */
	padding: 20px;
}

dialog>div:nth-child(2)>form {
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: .5rem
}

dialog>div:nth-child(2)>form>textarea {
	min-width: 30vw;
	min-height: 20vh;
}

.loader {
	border: 8px solid #f3f3f3; /* Fundo */
	border-top: 8px solid var(--blue);
	border-radius: 50%;
	width: 30px;
	height: 30px;
	animation: spin 2s linear infinite;
}

@keyframes fade-in {
	0% { opacity: 0; }
	100% { opacity: 1; }
}

@keyframes fade-out {
	0% { opacity: 1; }
	100% { opacity: 0; }
}

@keyframes slide-up {
	0% { transform: translateY(100%); }
	100% { transform: translateY(0%); }
}

@keyframes spin {
	0% { transform: rotate(0deg); }
	100% { transform: rotate(360deg); }
}

@keyframes grow {
	from { transform: scale(1); }
	to { transform: scale(1.1); }
}