style.css

body {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    height: 100vh;
    margin: 0;
    font-family: 'Assistant', sans-serif;
    background-color: #f4f4f9;
    color: #333;
}

.upper-txt {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    background-color: #4a90e2;
    color: #fff;
    padding: 2rem;
    width: 100%;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    margin-bottom: 1rem; 
}

.upper-txt h1 {
    margin: 0;
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.3; 
}

.upper-txt h2 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 400;
    line-height: 1.3;
    margin-top: 0.5rem; 
}

.btn-container {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
}

.btn {
    height: 12.5rem;
    width: 12.5rem;
    border-radius: 10%;
    border: none;
    margin: 1rem;
    font-size: 1.2rem;
    font-weight: bold;
    color: #fff;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    background-color: #3498db; 
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); 
}
.btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.red {
    background-color: #e74c3c;
}

.yellow {
    background-color: #f1c40f;
}

.purple {
    background-color: #9b59b6;
}

.green {
    background-color: #2ecc71;
}

.flash {
    background-color: #fff;
}

.userflash {
    background-color: #3498db;
}


@media (max-width: 768px) {
    .upper-txt {
        padding: 1rem;
    }

    .upper-txt h1 {
        font-size: 2rem;
    }

    .upper-txt h2 {
        font-size: 1.2rem;
    }

    .btn {
        height: 10rem;
        width: 10rem;
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    .upper-txt {
        padding: 0.5rem;
    }

    .upper-txt h1 {
        font-size: 1.8rem;
    }

    .upper-txt h2 {
        font-size: 1rem;
    }

    .btn {
        height: 8rem;
        width: 8rem;
        font-size: 0.8rem;
    }
}