não ficou como o do professor

Estava vendo a aula e percebi que o meu não tinha ficado igual ao do professor e eu não sei o pq

css:

@media screen and (min-width: 1440px){
    body {
        display: grid;
        grid-template-columns: auto 1fr;
    }
}

.cabecalho {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: #15191C;
    padding: 8px 16px;
    box-shadow: 0px 4px 4px rgba(0, 0, 0, 0.16);
}

.cabecalho__menu i::before {
    content: "\e904";
    font-size: 24px;
}

.cabecalho__notificacao i::before {
    content: "\e906";
    font-size: 24px;
}

.cabecalho__logo {
    width: 40px;
}

.cabecalho__perfil {
    display: none;
}

@media screen and (min-width: 1440px){
    .cabecalho {
        background-color: #1D232A;
        display: grid;
        column-gap: 32px;
        grid-template-columns: 1fr auto;
        padding: 16px 60px;
        height: 80px;
        box-sizing: border-box;
    }

    .cabecalho__menu {
        display: none;
    }

    .cabecalho__logo {
        display: none;
    }

    .cabecalho__perfil{
        display: grid;
        grid-template-columns: repeat(3, auto);
        column-gap: 8px;
        align-items: center;
        justify-self: flex-end;
        color: #95999C;
        padding: 8px 32px;
        border-right: 1px solid #95999C;
    }

    .cabecalho__perfil::before {
        content: "";
        display: block;
        width: 32px;
        height: 32px;
        background-image: url(../img/profile_2.png);
        background-repeat: no-repeat;
        background-position: center;
    }

    .cabecalho__perfil::after {
        content: "\e90d";
        color: #FFFFFF;
        font-size: 1.5rem;
    }
}

.menu-lateral {
    display: flex;
    flex-direction: column;
    background-color: #15191C;
    width: 75vw;
    height: 100vh;

    position: absolute;
    left: -100vw;
    transition: .25s;
}

.menu-lateral--ativo{
    left: 0;
    transition: .25s;
}

.menu-lateral__logo {
    width: 118px;
    align-self: center;
    padding: 16px;
}

.menu-lateral__link {
    height: 64px;
    color: #95999C;
    padding-left: 64px;
    display: flex;
    align-items: center;
}

.menu-lateral__link--ativo{
    color: #FFFFFF;
    padding-left: 56px;
    border-left: 8px solid #FFFFFF;
}

.menu-lateral__link::before{
    content: "";
    width: 24px;
    height: 24px;
    font-size: 24px;
    position: absolute;
    left: 24px;
}
@media screen and (min-width: 1440px){
    .menu-lateral{
        position: static;
        width: 200px;
    }
}

.principal {
    padding: 24px 16px;
    display: grid;
    gap: 16px;
}

.titulo-pagina {
    font-size: 1.5rem;
    font-weight: 700;
}

.titulo-secao {
    font-size: 1.2rem;
    font-weight: 700;
}

@media screen and (min-width: 1440px) {
    .princial {
        display: grid;
        grid-template-columns: auto 1fr auto;
        column-gap: 32px;
        padding: 16px 60px;
    }
}

.cartao {
    width: 100%;
    border-radius: 15px;
    overflow: hidden;
    background-color: #2C343A;
}

.cartao--destaque {
    margin-bottom: 16px;
}

.cartao__conteudo {
    padding: 16px;
    display: grid;
    grid-template-columns: auto  1fr;
    gap: 8px;
}

.cartao__destaque {
    grid-column: span 2;
}

.cartao__titulo {
    font-size: 1.2rem;
    font-weight: 700;
    grid-column: span 2;
}

.cartao__perfil {
    color: #95999C;
    font-size: 0.9rem;
    grid-column: span 2;
}

@media screen and (min-width: 1440px) {
    .cartao--recentes {
        display: grid;
        grid-template-columns: repeat(2, auto);
        align-items: center;
        row-gap: 24px;
        width: 256px;
        padding: 16px;
        box-sizing: border-box;
    }

    .cartao--recentes .cartao__titulo{
        grid-column: auto;
    }

    .cartao__link {
        font-size: 0.8rem;
        font-weight: 600;
        color: #0480DC;
        justify-self: flex-end;
    }

    .carato__lista {
        display: grid;
        row-gap: 16px;
        grid-column: span 2;
    }

    .cartao__item {
        display: grid;
        grid-template-columns: auto 1fr;
        gap: 8px;
    }

    .cartao__item-thumbnail {
        width: 32px;
        grid-row: span 2;
    }

    .cartao__item-titulo{
        font-size: 0.9rem;
        line-height: 1.2rem;
        font-weight: 700;
    }

    .cartao__item-perfil {
        font-size: 0.8rem;
        color: #95999C;
    }
}