body {
    background-color: #e0f7fa;  /* Soft pastel blue background */
    font-size: 100%;
    font-family: 'Open Sans', sans-serif;
    margin: 0;
    padding: 0;
    line-height: 1.6;
    color: #37474f;  /* Dark gray for readable text */
}

.container {
    padding: 3%;
    text-align: center;
    position: relative;
    max-width: 1000px;
    margin: auto;
    background-color: rgba(178, 223, 219, 0.9);  /* Light teal with stronger transparency */
    border-radius: 15px;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);  /* Stronger shadow for depth */
    border: 1px solid rgba(0, 0, 0, 0.1);  /* Light border for separation */
}

.heading {
    color: #ffffff;
    background: linear-gradient(135deg, #00695c, #004d40);  /* Gradient for headings */
    font-size: 2.3em;
    font-weight: bold;
    padding: 1.5% 3%;
    border-radius: 10px;
    margin-bottom: 15px;
}

button {
    background-color: #ff7043;  /* Burnt orange buttons */
    color: #ffffff;
    border: none;
    padding: 12px 24px;
    text-align: center;
    font-size: 1.15em;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s, color 0.3s, box-shadow 0.3s;
    display: inline-block;
    margin: 10px 0;
}

.button:hover {
    background-color: #d84315;  /* Darker burnt orange on hover */
    color: #ffffff;
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.1);
}

.button:active {
    background-color: #bf360c;
    color: #ffffff;
}

.img {
    height: auto;
    width: 100%;
    max-width: 60%;
    border-radius: 10px;
    margin-bottom: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.bottom {
    text-align: center;
    padding-top: 20%;
    color: #37474f;
    margin: auto;
    background-color: #ffffff;
    padding: 2%;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

#sec {
    display: none;
    background-color: #ff8a65;  /* Rich coral accent for content reveal */
    text-align: center;
    padding: 4%;
    color: #ffffff;
    font-size: 1em;
    border-radius: 10px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

a {
    color: #00695c;
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: #ff7043;
}

/* Mobile Optimization */
@media only screen and (max-width: 768px) {
    .container {
        padding: 5%;
    }

    .heading {
        font-size: 2em;
    }

    button {
        width: 100%;
        padding: 15px 30px;
    }

    .img {
        width: 100%;
    }
}