/*Button voltar ao topo*/
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--cor-secundaria);
    color: white;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.3);
    overflow: hidden;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--cor-fundo);
}

/* Ícone de seta para cima usando CSS puro */
.back-to-top::after {
    content: "";
    width: 12px;
    height: 12px;
    border-left: 3px solid #fff;
    border-top: 3px solid #fff;
    transform: rotate(45deg);
    margin-top: 4px;
}

/*Fim button voltar ao topo*/

main{
    margin-top: 8%;
}
header{
        background-color: #212121;
}
.title-containers{
    margin: 0 auto 0 auto;
    text-align: center;
    width: fit-content;
}
.title-containers h1 {
    margin: 0 0 0 0;
  
    font-family: var(--fonte-principal);
    text-transform: uppercase;
    font-size: var(--fs-titulo);
    font-weight: var(--font-bold-titulo);
    
}
hr {
    background-color: var(--cor-primaria);
    height: 6px;
    opacity: 100;
    border: none;
    margin: 10px auto;
    padding: 0;
    width: 50%;
}

.container-calendar{
    margin-top: 50px;
    margin-bottom: 100px;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}
iframe{
    width: 85%;
    height: 700px;
}
@media (max-width: 1300px) {
    main{
        margin-top: 12%;
    }
}
@media (max-width: 900px) {
    main{
        margin-top: 14%;
    }
}
@media (max-width: 800px) {
    main{
        margin-top: 18%;
    }
}
@media (max-width: 650px) {
    main{
        margin-top: 22%;
    }
}
@media (max-width: 500px) {
    main{
        margin-top: 28%;
    }
}
@media (max-width: 400px) {
    main{
        margin-top: 32%;
    }
}
@media (max-width: 320px) {
    main{
        margin-top: 35%;
    }
}