* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
.hide {
  display: none;
}

body {
  padding: 0px 30px;
}
/* grid -layout  */
.gird-layout {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(3, 200px) 50px 50px;
  gap: 20px;
  margin-top: 50px;
}
#box-1 {
  grid-row: span 5;
}
#box-11,
#box-12 {
  grid-column: span 3;
}
.box {
  background: gray;
  border-radius: 5px;
  display: flex;
  justify-content: center;
  align-items: center;
  color:#fff;
  font-weight: bold;
  font-size: 20px;
  font-family: sans-serif;
}

img {
  width: 100%;
  height: 100%;
  border-radius: 5px;
}
h2 {
  margin: 30px 0px;
  font-family: "Courier New", Courier, monospace;
  font-weight: bold;
  font-size: 30px;
}
.row {
  height: 400px;
  display: flex;
  gap: 5px;
  margin-top: 5px;
}
.row div {
  flex: 1;
}
.bertival-collage img {
  height: calc((100% - 5px) / 2);
}
.squire {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 5px;
}

/* grid layout 2  */
header,
nav,
main,
.sidebr,
.advise,
footer {
  border: 2px solid tomato;
  padding: 20px;
  border-radius: 5px;
  text-transform: capitalize;
  font-family: Arial, Helvetica, sans-serif;
}
.header {
  grid-area: header;
}
.nav {
  grid-area: nav;
}
.main {
  grid-area: main;
}
.sidebr {
  grid-area: sidebr;
}
.advise {
  grid-area: advise;
}
.footer {
  grid-area: footer;
}

.container {
  margin-top: 50px;
  display: grid;
  gap: 20px;
  grid-template-areas:
    "header header header header"
    "nav    main   main   sidebr"
    "nav    main   main   advise"
    "footer footer footer footer";
}

/* flex layout start  */

@media screen and (max-width: 576px) {
  .row {
    flex-direction: column;
    height: auto;
  }
  .squire {
    grid-template-columns: 1fr;
  }
  .gird-layout {
    grid-template-columns: repeat(4 1fr);
    grid-template-rows: repeat(12, 1fr);
  }
  #box-1 {
    grid-row: 1;
    grid-column: span 4;
  }
  .box {
    grid-column: span 4;
    height: 50px;
  }
  #box-11,
  #box-12 {
    grid-column: span 4;
  }
  .container {
    grid-template-areas:
      "header  header  header  header "
      "nav     nav     nav     nav    "
      "main    main    main    main   "
      "sidebr sidebr sidebr sidebr"
      "advise  advise  advise  advise "
      "footer  footer  footer  footer ";
  }
}

@media screen and (min-width: 577px) and (max-width: 992px) {
  .row {
    flex-direction: column;
    height: auto;
  }
  .container {
    grid-template-areas:
      "header  header header header"
      "nav     nav    nav    nav"
      "sidebr  main   main   main"
      "advise  footer footer footer";
  }
}