* {
	margin: 0;
	padding: 0;
	box-sizing: border-box;
}

body {
	font-family: sans-serif;
	background: #b2e0e654;/*
	background-image: url(https://www.itl.cat/pngfile/big/144-1447861_53-math-equation-wallpapers-on-wallpaperplay-kids-math.jpg);
	background: url(https://i.pinimg.com/originals/89/ea/72/89ea7278458f045fc10691ce3dd08fab.jpg);
	url(https://i.pinimg.com/originals/83/04/a9/8304a9c7cce7981bf599b8c1d78bda7f.jpg)
	*/background-image: url(https://c8.alamy.com/comp/W8W4KC/creative-olorful-blocks-light-box-fractions-on-yellow-background-interesting-funny-math-for-kids-education-back-to-school-concept-geometry-and-W8W4KC.jpg);
	background-position:  top center;
	background-repeat: no-repeat;
	background-attachment: all;
}
.clr {
	clear: both;
}
/*  NAVBAR */
#nav {
	background: transparent!important;
	color: #fff!important;
	font-family: cursive;
	letter-spacing: 1px;
	font-size: 27px!important;
}
.navbar-brand {
	font-size: 35px;
	margin: 10px 50px 10px 10px;
	text-shadow: 0px 0px 4px #222;
	font-weight: bold;
	transition: 0.3s ease;
}
.navbar-brand:hover {
	text-shadow: 0px 2px 7px #222;	
}
.nav-link {
	color: #fff!important;
	text-shadow: 0px 0.5px 4px #222;
	margin: 0px 15px;
	font-weight: 800;
	letter-spacing: 1.2px;
	transition: 0.3s ease;
}
.nav-link:hover {
	text-shadow: 0px 2px 7px #222;
	color: #9cb0b7!important;
}
.navbar-toggler {
	outline: none!important;
	transition: 0.3s ease;
	font-size: 16px;
	border: 1px solid #e8f0f3!important;
}
.navbar-toggler:hover {
	background: #e8f0f3ab;
}

/*  NAVBAR End */

/* MAIN */
#block {
	width: 25%;
	height: 330px;
	display: inline-block;
	float: left;
	background: #e8f0f3cc;
	border-radius: 10px;
	margin: 170px 30px 0px;
	transition: 0.3s ease;
}
#block:hover {
	cursor: pointer;
	background: #dce1e2;
	box-shadow: 0px 8px 15px #555;
}
#block > h3 {
	color: #333;
	font-family: cursive;
	letter-spacing: 1.5px;
	text-align: center;
	margin: 20px;
}
hr {
	width: 80%;
	display: flex;
	justify-content: center;
	margin: 5px auto;
}
#content {
	color: #333;
	font-family: cursive;
	font-size: 16px;
	letter-spacing: 1px;
	text-align: center;
	margin: 15px 30px;
}
button {
	font-size: 20px;
	padding: 8px 15px;
	margin: 13px auto;
	display: flex;
	justify-content: center;
	border-radius: 6px;
	color: #fff;
	letter-spacing: 2px;
	font-weight: 800;
	font-family: cursive;
	background: #224b9c;
	border: 1px solid #224b9c;
	transition: 0.3s ease;
	outline: none;
}
button:hover {
	color: #224b9c;
	background: transparent;
	border: 1px solid #224b9c;
	cursor: pointer;
}
.fa-chevron-right {
	margin: 8px 0px 8px 10px;
}
a:hover {
	text-decoration: none;
}
.aftor {
	width: 50px;
	height: 20px;
	background: rgba(255, 255, 255, 0.8);
	color: #222;
	letter-spacing: 1px;
	font-size: 15px;
	padding: 5px 10px;
}

/* MAIN End */

/*  --- RESPONSIVE ---  */
/*  Tablet  */
@media only screen and (max-width: 1023px) {

body {
	background-image: url(../images/img9.jpg);
	overflow-x: hidden!important;
}
/* MAIN */
#block {
	width: 30%;
	height: 350px;
	margin: 30vh 10px 0px;
	background: #e8f0f3;
}
#block:hover {
	background: #ffffff;
}
#block > h3 {
	margin: 15px;
}
#content {
	font-size: 16px;
	letter-spacing: 1.5px;
	margin: 15px 20px;
}
button {
	font-size: 19px;
	padding: 8px 15px 7px 23px;
	margin: 20px auto;
}
.fa-chevron-right {
	margin: 6px 0px 7px 20px;
}
/* MAIN End */

}
/*  Tablet End  */


/*  Mobile  */
@media only screen and (max-width: 767px) {
/*  NAVBAR */
#nav {
	background: rgba(0, 0, 0, 0.6)!important;
	font-size: 24px;
}
.navbar-brand {
	color: #fbff00!important;
	font-size: 30px;
	margin: 5px 70px 5px 5px;
}.navbar-togler {
	font-size: 15px;
}
.nav-link {
	font-size: 22px;
}
/*  NAVBAR End */
/* MAIN */
#block {
	width: 90%;
	height: 275px;
	display: block;
	float: none;
	margin: 20px;
}
.block-1 {
	margin-top: 120px!important;
}

#block > h3 {
	padding: 5px;
}
hr {
	margin: 0px auto;
}
#content {
	font-size: 16px;
	letter-spacing: 1.5px;
	margin: 10px 25px;
}
button {
	font-size: 17px;
	padding: 7px 13px 6px 20px;
	margin: 15px auto;
}
.fa-chevron-right {
	margin: 6px 0px 7px 20px;
}
/* MAIN End */
}
/*  Mobile End  */


/*  --- RESPONSIVE End ---  */