style.css

/*
ESTRUTURA BASE
==============
1- DECLARAÇÃO DE VARIÁVEIS
2- ESTILOS GERAIS
3- BODY
4- HEADER
5- FOOTER
6- PÁGINA INICIAL
7- EXTRAS
8- @MEDIA
*/

/* DECLARAÇÃO DE VARIÁVEIS */
:root{
    --max-width-padrao: 1125px;
    --cor-frente-padrao: rgb(212, 116, 5);

    --cor-background-primaria: cadetblue;
    --cor-background-secundaria: #04133d;
    --cor-background-header-footer: white;
    --cor-texto-primaria: #636363;
    --cor-texto-secundaria: black;
    --cor-botao-dark-mode: #d4e9ff;
}

/* ESTILOS GERAIS */
html, body, figure, img, div, input, textarea, p, a, h1, h2, h3, h4, h5, h6, ul, li, main{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    list-style: none;
    text-decoration: none;
}

.coluna{
    flex-basis: 49%;
}

.hidden{
    display: none;
}

/* BODY */
body{
    font-family: 'Open Sans', sans-serif;
}

/* HEADER */
header{
    background-color: var(--cor-background-primaria);
    padding: 30px 30px 0;
}
header .container{
    background-color: var(--cor-background-header-footer);
    padding-bottom: 15px;
}
header .linha{
    align-items: center;
}
header .coluna{
    text-align: center;
}
header .coluna-esquerda{
    flex-basis: 30%;
}
header .coluna-direita{
    flex-basis: 70%;
}
header .coluna figure{}
header .coluna img{
    max-width: 70%;
}
header .coluna h1{
    font-size: 2rem;
    color: var(--cor-texto-secundaria);
}
header .coluna p{
    font-size: 1rem;
    color: var(--cor-texto-primaria);
}
header .coluna ul{
    margin: 15px 0 0;
}
header .coluna ul li{
    margin: 0 0 5px;
}
header .coluna ul li a{
    font-size: 1rem;
    color: var(--cor-texto-secundaria);
}

/* FOOTER */
footer{
    background-color: var(--cor-background-secundaria);
}
footer .container{
    padding: 20px;
}
footer nav{}
footer nav ul{
    margin: 20px;
}
footer nav ul li{}
footer nav ul li a{
    color: var(--cor-background-header-footer);
}
footer nav .info-contato{}
footer nav .info-contato li{
    margin: 0 0 10px;
}
footer nav .info-contato li a{}
footer nav .redes-sociais{
    border-top: 1px solid rgb(255 255 255 / 40%);
    margin: 30px 0 20px;
    padding: 30px 0 0;
    text-align: center;
}
footer nav .redes-sociais li{
    margin: 10px 15px;
    text-align: center;
    display: inline-block;
}
footer nav .redes-sociais li a{}
footer nav .redes-sociais li a img{
    width: 30px;
}
footer nav .redes-sociais li a img p{}

/* PÁGINA INICIAL */
main{}
main .container{}
main .linha{}
main .coluna{
    padding: 20px;
}
main .coluna-esquerda{}
main .coluna-direita{}
main .coluna section{
    border-bottom: 1px solid var(--cor-botao-dark-mode);
    margin: 0 0 20px;
    min-height: 154px;
    color: var(--cor-texto-secundaria);
}
main .coluna section h2{
    font-size: 1.4rem;
    margin: 0 0 10px;
}
main .coluna section p{
    font-size: 0.9rem;
    color: var(var(--cor-texto-primaria));
    line-height: 1.5;
}
main .coluna section ul{}
main .coluna section ul li{
    margin: 0 0 10px;
}
main .coluna section ul li h3{
    font-size: 1.2rem;
}
main .coluna section ul li strong{
    font-size: 1rem;
    font-weight: 500;
    margin: 5px 0 10px;
    display: inline-block;
}
main .coluna section ul li p{}

/* EXTRAS */
/* === FINAL DO COMENTÁRIO ===
.ativar-dark{
    width: 50px;
    height: 50px;
    display: none;
}
header .container{
    position: relative;
}
label{
    position: absolute;
    top: 30px;
    right: 30px;
    width: 52px;
    height: 30px;
    background-color: var(--cor-background-secundaria);
    border-radius: 20px;
    padding: 5px 5px;
    box-sizing: border-box;
    cursor: pointer;
}
label span{
    width: 20px;
    height: 20px;
    display: block;
    background-color: var(--cor-botao-dark-mode);
    border-radius: 100%;
    transition: all ease .3s;
}
.ativar-dark:checked ~ .dark-mode label{
    background-color: var(--cor-botao-dark-mode);
}
.ativar-dark:checked ~ .dark-mode label span{
    background-color: var(--cor-background-secundaria);
    transform: translateX(22px);
    transition: all ease .3s;
}
.ativar-dark:checked ~ .dark-mode{
    --cor-background-primaria: black;
    --cor-background-secundaria: #000;
    --cor-texto-primaria: white;
    --cor-texto-secundaria: #fff;
}
.ativar-dark:checked ~ .dark-mode header{
    background-color: var(--cor-background-secundaria);
}
.ativar-dark:checked ~ .dark-mode header .container{
    background-color: var(--cor-background-secundaria);
}
.ativar-dark:checked ~ .dark-mode main{
    background-color: var(--cor-background-secundaria);
}
=== FINAL DO COMENTÁRIO === */

/* @MEDIA */
/* Utilizar neste trecho todo código para formataçao de telas maiores que 768px */
@media only screen and (min-width: 768px){
    .container{
        width: 100%;
        max-width: var(--max-width-padrao);
        margin: 0 auto;
        padding: 20px;
    }
    .linha{
        display: flex;
        flex-wrap: wrap;
        align-items: flex-start;
        justify-content: space-between;
    }
    header{
        padding: 30px 0 0;
    }
    header .coluna img{
        max-width: 120%;
        border-radius: 100%;
    }
        footer nav .redes-sociais{
        display: flex;
        justify-content: center;
    }
    main .coluna{
        padding: 0;
    }
    main .coluna section{
        border: 1px solid var(--cor-botao-dark-mode);
        padding: 20px;
    }
}