* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(45deg, #2c3e50, #3498db);
    font-family: Arial, sans-serif;
}

.container {
    padding: 20px;
}

.calculator {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 20px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.2);
    width: 320px;
}

.display {
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    text-align: right;
    font-size: 2em;
    color: white;
    min-height: 60px;
    word-wrap: break-word;
    overflow: hidden;
}

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

.calc-button {
    padding: 15px;
    border: none;
    border-radius: 10px;
    font-size: 1.2em;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.calc-button:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.calc-button:active {
    transform: translateY(0);
}

.operator {
    background: rgba(52, 152, 219, 0.3);
}

.equals {
    background: rgba(46, 204, 113, 0.3);
    grid-column: span 1;
}

.clear {
    background: rgba(231, 76, 60, 0.3);
}

.number {
    background: rgba(255, 255, 255, 0.15);
}

@media (max-width: 360px) {
    .calculator {
        width: 100%;
        padding: 15px;
    }

    .calc-button {
        padding: 10px;
        font-size: 1em;
    }
}