*{box-sizing:border-box}
body{margin:0;font-family:Arial, Helvetica, sans-serif;background:#f5f7fa;color:#333}

/* HEADER */
header{
background:#0b6b4a;
color:white;
/*padding:15px 8%;*/
display:flex;
justify-content:space-between;
align-items:center
}

header h1{margin:0;font-size:26px}

nav a{
color:white;
margin-left:20px;
text-decoration:none;
font-weight:bold
}

/* HERO */
.hero{
background:linear-gradient(135deg,#edeef2,#f3dec9);
color:white;
padding:90px 0 0 15px;
text-align:left;
float:left;
width: 100%;
}

.hero h2{
font-size:60px;
margin-bottom:10px;

color: #0d1629;
font-weight: bold;
font-family:Verdana, Geneva, Tahoma, sans-serif;
}

.hero p{
font-size:30px;
margin-bottom:30px;
color: #0d1520;

}

.hero_left_section
{
    width: 50%;
    float:left;
    display: grid;
}

.hero_right_section
{
    width: 50%
    float:right;
    
    display: grid;
}

.button{
background:#f39c12;
padding:14px 30px;
border-radius:6px;
text-decoration:none;
color:white;
font-weight:bold
}

/* SECTIONS */
.section{
padding:70px 10%;
text-align:left;
margin-top: 60px;
}

.section h2{
color:#083b5c;
margin-bottom:25px
}

/* COURSE GRID */
.courses{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
gap:25px;
margin-top:40px
}

.card{
background:white;

border-radius:10px;
box-shadow:0 6px 18px rgba(0,0,0,0.08);
border: 1px solid #dedbe2;
}

.card_content
{
    padding:25px;
    font-size: 18px;
    font-family:Verdana, Geneva, Tahoma, sans-serif;
    color: #1a1a24;
}

.responsive_youtube
{
    overflow:hidden;
    padding-bottom: 30%;
    position: relative;
    height: 0;
}

.responsive_youtube iframe
{
    left: 0;
    top: 0;
    height: 100%;
    width: 100%;
    position: absolute;
}

.card h3{
color:#ffffff;
background-color: #0747a1;
border-radius: 10px 10px 0 0;
margin:0;
padding: 9px;
text-align: center;
font-size: 24px;
}

/* FEATURES */
.features{
display:grid;
grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
gap:20px;
margin-top:40px
}

.feature{
background:#e86b19;
padding:20px;
border-radius:8px;
box-shadow:0 4px 12px rgba(0,0,0,0.07);
font-size: 16px;
color: #ffffff;
font-weight: bold;
font-family:Verdana, Geneva, Tahoma, sans-serif;
text-align: center;
}

/* CONTACT */
.contact{
background:#083b5c;
color:white;
padding:70px 10%;
text-align:center;
float:left;
width: 100%;
margin-top: 30px;
font-size: 30px;
}

.contact h2
{
    font-size: 64px;
}

form{
max-width:500px;
margin:auto
}

form input,form textarea{
width:100%;
padding:12px;
margin:10px 0;
border:none;
border-radius:6px
}

form button{
background:#f39c12;
border:none;
padding:14px 30px;
color:white;
border-radius:6px;
font-weight:bold;
cursor:pointer
}

footer{
background:#06263a;
color:white;
text-align:center;
padding:20px;
font-size:14px;
float:left;
width: 100%;
}

img{
    width: 100%;
}

.menu_bar
{
    background-color: #0067a2;
    width: 100%;
    float: left;
    
    padding-top: 7px;
    font-size: 24px;
    color:#091221;
    font-weight: bold;
    font-family:Verdana, Geneva, Tahoma, sans-serif;
    border-bottom: 3px solid #9ba3b0;
    border-top: 3px solid #9ba3b0;
    box-shadow: #333;
}

.menu_bar ul
{
    margin: 0;
    padding: 0;
}

.menu_bar ul li
{
    display:inline;
    margin-left: 35px;
}

.menu_bar ul li a
{
    color: #091221;
    text-decoration: none;
}

.section_about
{
    width: 100%;
    float:left;
    margin-top: 60px;
    padding-left: 10%;
}

.section_courses
{
    width: 100%;
    float:left;
    margin-top: 60px;
    padding-left: 10%;
    padding-right: 10%;
}

.section_courses h2
{
    font-size:64px;
    color: #0d1629;
font-weight: bold;
font-family:Verdana, Geneva, Tahoma, sans-serif;
text-align:center;
margin-top: 0;
}

.section_about h2
{
    font-size:64px;
    color: #0d1629;
font-weight: bold;
font-family:Verdana, Geneva, Tahoma, sans-serif;
text-align:center;
margin-top: 0;

}

.section_about p
{

    font-size: 24px;
    font-family:Verdana, Geneva, Tahoma, sans-serif
}

.card_content ul
{
    margin: 0 0 0 15px;
    padding: 0;
}

.card_content ul li
{
    list-style-type: square;
    line-height: 150%;
}

.classes
{
    font-size: 14px;
    font-weight: bold;
}

.section_why
{
    width: 100%;
    margin-top: 60px;
    float:left;
    padding-left: 10%;
    padding-right: 10%;
    
}

.section_why h2
{
     font-size:64px;
    color: #0d1629;
font-weight: bold;
font-family:Verdana, Geneva, Tahoma, sans-serif;
text-align:center;
margin-top: 0;


}