@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;700&family=Quicksand:wght@400;600&display=swap');

body {
    font-family: 'Quicksand', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-image: url("https://i.pinimg.com/originals/08/5f/03/085f036aa0707d484ad1c2e2eb7bdb8f.gif");
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-attachment: fixed;
}

.calculadora {
    background:url("https://i.pinimg.com/736x/8e/a1/f7/8ea1f7bf7f4dd7a727c41fdbbc1083c1.jpg");
    padding: 20px;
    border-radius: 20px;
    box-shadow: 5px 5px 15px rgba(255, 100, 150, 0.3);
    text-align: center;
    border: 3px solid #ff99bb;
}

#display {
    width: calc(100% - 20px);
    height: 50px;
    font-size: 24px;
    margin-bottom: 15px;
    border: none;
    border-radius: 10px;
    padding: 10px;
    background: #fff0f5;
    color: #ff66a3;
    font-weight: bold;
    box-shadow: inset 2px 2px 5px rgba(255, 100, 150, 0.2);
    text-align: center;
    display: block;
    line-height: 50px;
}

.botoes {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
}

button {
    padding: 15px;
    font-size: 20px;
    cursor: pointer;
    background: #ff99bb;
    border: none;
    border-radius: 15px;
    box-shadow: 3px 3px 10px rgba(255, 100, 150, 0.4);
    transition: 0.2s;
    font-family: 'Poppins', sans-serif;
    font-weight: bold;
    color: white;
}

button:hover {
    background: #ff66a3;
    transform: scale(1.05);
}

button:active {
    background: #ff4d94;
    transform: scale(0.95);
}

button:nth-child(1), button:nth-child(2) {
    background: #ff80bf;
}

button:nth-child(1):hover, button:nth-child(2):hover {
    background: #ff4d94;
}

button:nth-child(3),
button:nth-child(4),
button:nth-child(8),
button:nth-child(12),
button:nth-child(16),
button:nth-child(18) {
      background: #ff99aa;
}

button:nth-child(3):hover, button:nth-child(4):hover, button:nth-child(8):hover, button:nth-child(12):hover, button:nth-child(16):hover, button:nth-child(18):hover {
    background: #ff66a3;
}

button:nth-child(17) {
    background: #ff99bb;
}