*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    list-style: none;
}

body {
    background-color: rgb(36, 36, 36);
    overflow-x: hidden;
}


/* =========================
   HEADER
========================= */

.header {
    display: grid;

    grid-template-columns: auto auto;
    grid-template-rows: auto auto;

    grid-template-areas:
        "h1 nav"
        "h2 h2";

    justify-content: space-between;
    align-items: center;

    gap: 15px;

    font-family: Arial, Helvetica, sans-serif;

    padding: 20px;
}

h1 {
    grid-area: h1;

    color: rgb(242, 243, 243);

    font-size: clamp(1.8rem, 4vw, 3rem);
}

nav {
    grid-area: nav;
}

h2 {
    grid-area: h2;

    color: rgb(203, 204, 204);

    font-size: clamp(0.8rem, 2vw, 1rem);

    padding-left: 10px;
}

ul {
    display: flex;

    flex-wrap: wrap;

    justify-content: flex-end;

    gap: 5px;
}

ul li {
    padding: 10px;
}

ul li a {
    text-decoration: none;

    color: rgb(242, 243, 243);
}

ul li a:hover {
    color: rgb(206, 206, 206);

    transition: 0.5s;
}


/* =========================
   GALERIA
========================= */

.container {
    width: 100%;

    display: grid;

    grid-template-columns:
        repeat(5, minmax(0, 1fr));

    grid-template-rows:
        repeat(5, 300px);

    grid-template-areas:
        "img1 img1 img2 img3 img4"
        "img5 img6 img6 img7 img8"
        "img9 img10 img11 img11 img12"
        "img13 img14 img15 img16 img17"
        "img18 img19 img20 img20 img21";

    gap: 15px;

    padding: 30px;
}


/* =========================
   ITENS
========================= */

.a {
    grid-area: img1;
}

.b {
    grid-area: img2;
}

.c {
    grid-area: img3;
}

.d {
    grid-area: img4;
}

.e {
    grid-area: img5;
}

.f {
    grid-area: img6;
}

.g {
    grid-area: img7;
}

.h {
    grid-area: img8;
}

.i {
    grid-area: img9;
}

.j {
    grid-area: img10;
}

.k {
    grid-area: img11;
}

.l {
    grid-area: img12;
}

.m {
    grid-area: img13;
}

.n {
    grid-area: img14;
}

.o {
    grid-area: img15;
}

.p {
    grid-area: img16;
}

.q {
    grid-area: img17;
}

.r {
    grid-area: img18;
}

.s {
    grid-area: img19;
}

.t {
    grid-area: img20;
}

.u {
    grid-area: img21;
}


/* =========================
   IMAGENS
========================= */

.item {
    min-width: 0;
    min-height: 0;

    overflow: hidden;

    border-radius: 5px;
}

.item img {
    display: block;

    width: 100%;
    height: 100%;

    object-fit: cover;

    border-radius: 5px;

    transition: 0.5s;
}

.item img:hover {
    opacity: 60%;
}


/* =========================
   FOOTER
========================= */

.footer p {
    text-align: center;

    font-size: 0.8rem;

    font-family: Arial, Helvetica, sans-serif;

    letter-spacing: 1px;

    color: white;

    padding: 20px;
}


/* ==================================================
   TABLET
================================================== */

@media (max-width: 900px) {

    .header {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;

        grid-template-areas:
            "h1"
            "h2"
            "nav";

        justify-items: center;

        text-align: center;
    }

    h2 {
        padding-left: 0;
    }

    ul {
        justify-content: center;
    }

    .container {
        grid-template-columns:
            repeat(2, minmax(0, 1fr));

        grid-template-rows:
            repeat(11, 250px);

        grid-template-areas:
            "img1 img1"
            "img2 img3"
            "img4 img5"
            "img6 img6"
            "img7 img8"
            "img9 img10"
            "img11 img11"
            "img12 img13"
            "img14 img15"
            "img16 img17"
            "img18 img19"
            "img20 img20"
            "img21 img21";
    }
}


/* ==================================================
   CELULAR
================================================== */

@media (max-width: 600px) {

    .header {
        padding: 20px 15px;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 0.9rem;
    }

    ul {
        width: 100%;

        display: grid;

        grid-template-columns: repeat(2, 1fr);

        gap: 5px;
    }

    ul li {
        padding: 8px;
    }

    .container {
        display: grid;

        grid-template-columns: 1fr;

        grid-template-rows: repeat(21, 250px);

        grid-template-areas:
            "img1"
            "img2"
            "img3"
            "img4"
            "img5"
            "img6"
            "img7"
            "img8"
            "img9"
            "img10"
            "img11"
            "img12"
            "img13"
            "img14"
            "img15"
            "img16"
            "img17"
            "img18"
            "img19"
            "img20"
            "img21";

        gap: 10px;

        padding: 15px;
    }

    .item {
        height: 250px;
    }

    .footer p {
        font-size: 0.7rem;

        padding: 20px 10px;
    }
}


/* ==================================================
   CELULAR PEQUENO
================================================== */

@media (max-width: 400px) {

    h1 {
        font-size: 1.7rem;
    }

    h2 {
        font-size: 0.8rem;
    }

    ul li {
        padding: 6px;
    }

    ul li a {
        font-size: 0.9rem;
    }

    .container {
        padding: 10px;
    }

    .item {
        height: 220px;
    }
}