body {
    font-family: 'Poppins', sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #ffe4e1, #ffc0cb);
    margin: 0;
}

.calculator-container {
    text-align: center;
}

.calculator-container h1 {
    margin-bottom: 20px;
    color: #d147a3;
}

.calculator {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: 25px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
    width: 300px;
}

.display {
    width: 100%;
    height: 50px;
    border-radius: 15px;
    border: none;
    padding: 10px;
    font-size: 1.5rem;
    text-align: right;
    margin-bottom: 20px;
    background: #fff0f5;
    box-shadow: inset 0 5px 10px rgba(0,0,0,0.05);
}

.buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
}

.btn {
    padding: 15px;
    font-size: 1.2rem;
    border: none;
    border-radius: 15px;
    background: #ffb6c1;
    color: #fff;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
}

.operator {
    background: #ff69b4;
}

.equal {
    background: #ff1493;
    color: #fff;
    grid-row: span 2;
}
.clear {
    background: #ffa6c9;
}