:root {
    --deep-blue: #0081A7;
    --teal: #00AFB9;
    --cream: #FDFCDC;
    --peach: #FED9B7;
    --bg: #fff1e6;
    --light-teal: #BEE1E6;
    --light-green: #E2ECE9;
    --coral: #EE6C4D;
}
/* Reset and basics */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body, html {
    height: 100%;
    font-family: 'Chocolate Classical Sans', sans-serif;
}

body {
    background: var(--bg);

}

.h1 {
    background-position: center;
    position: absolute;
    color: black;
    text-align: center;
    font-size: 50px;
    font-family: 'Chocolate Classical Sans', sans-serif;
    background-color: var(--teal);
    width: 100%;
}

.icon {
    float:left;
}

/* Unit titles */
.unittitle {
    font: serif;
    color: black;
    font-size: 50px;
    background-color: var(--teal);
    text-align: center;
    width: 100%;
    padding: .5em; 
}

/* Footer */
.footer {
    background: var(--teal);
    width: 100%;
    position: absolute;
    color: rgb(0,0,0);
    font-size: 30px;
    text-align: center;
    padding: 30px 0;
}

/* Background + overlay */
.background {
    position: relative;
    width: 100%;
    height: 100%;
    background: url('images/bg.jpeg') center/cover no-repeat;
    display: flex;
    align-items: center;
    justify-content: center;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(62,90,128,0.7), rgba(224,251,252,0.3));
    z-index: 1;
}

/* Main container */
.container {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 50px 40px;
    border-radius: 20px;
    max-width: 500px;
    width: 90%;
    color: var(--cream);
}

h1.title {
    font-size: 3rem;
    color: var(--cream);
    margin-bottom: 20px;
    text-shadow: 2px 2px 6px rgba(0,0,0,0.5);
}



.b{
    background-size: cover;
    background-repeat: no-repeat;
    width: 150px;
    height: 50px;
    padding-top: 9px;
    text-align: center;
    color: var(--cream);
    font-size: 24px;
    background-color: #EE6C4D;
    text-decoration: none;
    font-weight: 600;
    border-radius: 12px;
    transition: 0.3s;
    box-shadow: 2px 4px 8px rgba(0,0,0,0.2);
    margin: 0;
    float: none;
    transform: none !important;
    display: flex;
    align-items: center;
    justify-content: center;
}

.buttonspacing {
    display: flex;
    flex-wrap: nowrap;
    justify-content: center;
    align-items: center;
    gap: 16px;
    width: 100%;
    margin-top: 24px;
    padding-left: 10px;
    padding-right: 10px;
    padding-bottom: 10px;
    background-color: transparent;
}

.active {
    background-color: var(--deep-blue);
}

.buttonspacing .intro {
    flex: 1 1 0;
    min-width: 0;
    margin: 0;
}

.buttonspacing .b{
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 10px 16px;
    width: 100%;
}

.backb{
    display: block;
    background-size: cover;
    background-repeat: no-repeat;
    width: 20em;
    height: 20em;
    padding-top: 9px;
    text-align: center;
    color: var(--cream);
    font-size: 18px;
    background-color: var(--coral);
    text-decoration: none;
    font-weight: 600;
    border-radius: 12px;
    transition: 0.3s;
    box-shadow: 2px 4px 8px rgba(0,0,0,0.2);
}

.center-iframe {
    width: 540px;
    height: 960px;
    text-align: center;
    margin-top: 100px;
}

.center {
    text-align: center;
}

h2{
    padding-top: 5em;
    text-align: center;
}
/* Main "Start Learning" button */
.btn {
    display: inline-block;
    padding: 14px 32px;
    background-color: #EE6C4D; /* coral */
    color: var(--cream);
    text-decoration: none;
    font-weight: 600;
    border-radius: 12px;
    transition: 0.3s;
    box-shadow: 2px 4px 8px rgba(0,0,0,0.2);
}

.btn:hover {
    background-color: #F07157; /* lighter coral hover */
    transform: translateY(-3px);
}