:root {
  --color1: #d4eaf7;
  --color2: #b6ccd8;
  --color3: #3b3c3d;
  --color4: #4e88ca;
  --color5: #005B99;
  --color6: #1d1c1c;
  --color7: #313d44;
  --color8: #ffffff;
  --color9: #f5f4f1;
  --color10: #cccbc8;
  --bg-color: white
}
@font-face {
  font-family: Estedad;
  src: url(../fonts/Estedad.woff2);
}
@font-face {
  font-family: Mikhak;
  src: url(../fonts/Mikhak.woff2);
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  font-size: 17px;
  line-height: 30px;
}
body {
  /* رنگ پس‌زمینه اصلی */
  font-family: Estedad, Tahoma;
  background: var(--bg-color);
}
h2 {
font-size: larger;
 font-weight: bolder;
 padding-right: 20px;
}
/* H1 */
h1 {
  color: var(--color3);
  text-shadow: 3px 0px 3px var(--color2);
  font-size: 27px;
  font-family: Estedad;
  text-align: center;
  border: 10px;
  border-radius: 8px;
  padding: 10px;
  margin: 10px;
  background: #D4EAF7;
  background: linear-gradient(90deg, rgba(212, 234, 247, 1) 49%, rgba(182, 204, 216, 1) 76%);
}

/* Video */
video {
  width: 680px;
  border-radius: 8px;
  text-align: center;
  height: auto;
  display: block;
  margin: 0 auto 35px auto;
  box-shadow: rgba(149, 157, 165, 0.2) 0px 8px 24px;
}

/* Contact */
#contact {
  font-weight: bold;
}

/* لینک‌ها */
a {
  color: var(--color10);
  text-decoration: none;
}

a:hover {
  color: var(--color9);
}

summary {
  color: var(--color2);
  font-size: 25px;
  text-align: center;
  border-radius: 8px;
  padding: 10px;
  margin: 30px;
  background-color: var(--color5);
}
/* دکمه بالا */
#up {
  position: fixed;
  right: 10px;
  bottom: 40px;
  width: 50px;
  aspect-ratio: 1;
  background-image: url(../images/btn.png);
}

#up:hover {
  background-position: top right;
}

/* Main */
main {
  display: grid;
  grid-template-columns: 200px auto;
  grid-template-rows: auto auto auto auto;
  grid-template-areas:
    'a a'
    'b c'
    'd d'
  ;
  gap: 10px;
  width: 950px;
  min-height: 1000px;
  margin: 0 auto;
  padding: 10px;

  border: 10px solid none;
  border-radius: 8px;
  background-color: var(--bg-color);
  background-clip: padding-box;

}
header,aside,article,footer {
	background-color: var(--color9);
	border: 1px solid var(--color10);
	border-radius: 8px;
   color: var(--color6);
}

/* Header */
header {
  grid-area: a;
  padding: 10px 10px 0px 0px;
}

/* Aside */
aside {
  line-height: 20px;
  font-size: 15px;
  grid-area: b;
}

/* Article */
article {
  grid-area: c;
  padding: 10px;
}

/* Footer */
footer {
  color: var(--color10);
  grid-area: d;
  direction: ltr;
  text-align: center;
  letter-spacing: 8px;
  font-size: smaller;
}

#main-menu {
  display: none;
}

/* Main menu */
#main-menu ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

#main-menu ul li a {
  color: var(--color6);
  display: block;
  padding: 6px 10px;
  border-radius: 8px 0px 0px 8px;
  margin: 3px 0px;
  width: 100%;
  height: 100%;
 background-color:var(--color10); /* رنگ پس‌زمینه */
	color: var(--color6); /* متن روشن */
	border-right: 7px solid var(--color7); /* خط تیره کناری */
  /* خط تیره کناری */
  transition: 0.2s;
}

#main-menu ul li a:hover {
 	background-color: var(--color8); /* روشن‌تر در هاور */
	color: var(--color3);
	border-right: 7px solid var(--color4);
	box-shadow: 0 0 10px var(--color3); /* افکت ملایم */
  border-inline-end: 7px solid var(--color4);
  transform: scale(1.05);
  /* افکت ملایم */
}

/* Nav bar */
#nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  text-align: center;
  font-weight: 300;
}

#nav ul li {
  display: inline-block;
  /* کنار هم قرار گرفتن */

}

#nav ul li a {
  border-width: 5px;
  display: block;
  padding: 5px;
  border-radius: 8px 8px 0 0;
 background-color: var(--color10); /* رنگ تیره */
	color: var(--color6);
	border-bottom: 3px solid var(--color7);
  transition: 0.3s;
}

#nav ul li a:hover {
 	background-color:var(--color7); /* روشن‌تر شدن هاور */
	color: var(--color3);
	border-bottom: 2px solid var(--color4);
}

/* Ads */
#ads {
  position: fixed;
  left: 0;
  bottom: 0;
}

#gallery {
  text-align: center;
}

#gallrry img {
  transition: 0.2s;
}

#gallery img:hover {
  transform: scale(1.1)
}

@keyframes menuPlay {
  0% {
    transform: translate(-300px);
  }

  50% {
    transform: translate(-30px);
  }

  100% {
    transform: translate(0px);
    opacity: 1;
  }
}

@keyframes logoplay {
  from {
    transform: translate(-300px);
    opacity: 0;
  }

  to {
    transform: translate(0px);
    opacity: 1;
  }
}

#logo {
  animation: logoplay 2s;
  border: solid none;
  margin-right: 40px;
}

#main-menu ul li {
  opacity: 0;
  animation: menuPlay 2s forwards;
}

@keyframes navplay {
  0% {
    transform: translate(-100px);
  }


  50% {
    transform: translate(30px);
  }

  100% {
    transform: translate(0px);
    opacity: 1;
  }
}

#nav ul li {
  opacity: 0;
  animation: navplay 4s forwards;

}

@keyframes menuHover {
  0% {
    background-color: var(--color5);
    transform: scale(1.0);
  }

  50% {
    background-color: var(--color5);
    transform: scale(1.5);
  }

  100% {
    background-color: var(--color4);
    transform: scale(1.0);
  }
}

#main-menu ul li a:hover {
  animation: menuHover 1.5s;
}


/* Medium screen */
@media screen and (max-width: 1024px) {
  main {
    width: 100%;
  }

  #nav {
    display: none;
  }

  #main-menu {
    display: inherit;
  }
}

/* small screen */
@media screen and (max-width: 500px) {
  main {
    grid-template-columns: auto;
    grid-template-rows: auto auto auto auto;
    grid-template-areas:
      'a'
      'c'
      'b'
      'd'
    ;
  }
}

#box {
  width: 100px;
  aspect-ratio: 1;
  margin: 0 auto;
  position: relative;
  transform: scale(0.5);
}

#box div:first-child {
  position: absolute;
  left: 0px;
  bottom: 0px;
  width: 60px;
  aspect-ratio: 1;
  background-color: var(--color4);
  z-index: 2;
}

#box div:nth-child(2) {
  position: absolute;
  bottom: 60px;
  left: 10px;
  width: 60px;
  height: 20px;
  transform: skewX(-45deg);
  background-color: var(--color5);
  z-index: 2;
}

#box div:last-child {
  position: absolute;
  bottom: 10px;
  left: 60px;
  width: 20px;
  height: 60px;
  transform: skewY(-45deg);
  background-color: var(--color7);
  z-index: 2;
}

/* shadow */
#box div:nth-child(3) {
  position: absolute;
  bottom: 0px;
  left: 10px;
  width: 60px;
  height: 20px;
  transform: skewX(-45deg);
  box-shadow: 0px -3px 7px black;
  z-index: 1;
}