.calculator-container {
    max-width: 400px;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    border-radius: 30px;
    padding: 2rem;
}

.calculator {
    width: 100%;
}

.display-input {
    font-size: 2rem;
    text-align: right;
    font-weight: bold;
    background-color: #f8f9fa;
    border: 2px solid var(--secondary-color);
    border-radius: 15px;
    padding: 1rem;
    min-height: 80px;
    color: var(--text-dark);
}

.calc-btn {
    height: 70px;
    font-size: 1.5rem;
    font-weight: bold;
    border-radius: 15px;
    transition: all 0.2s ease;
    border: none;
}

.calc-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

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

.calc-btn.number {
    background-color: #f8f9fa;
    color: var(--text-dark);
    border: 2px solid var(--secondary-color);
}

.calc-btn.number:hover {
    background-color: var(--secondary-color);
    color: var(--text-dark);
}

.calc-btn.operator {
    background-color: var(--accent-color);
    color: white;
    border: 2px solid var(--accent-color);
}

.calc-btn.operator:hover {
    background-color: #29b6f6;
    border-color: #29b6f6;
}

.calc-btn.equals {
    background-color: var(--primary-color);
    color: white;
    border: 2px solid var(--primary-color);
}

.calc-btn.equals:hover {
    background-color: #e91e63;
    border-color: #e91e63;
}

.btn-danger {
    background-color: #dc3545;
    border-color: #dc3545;
}

.btn-danger:hover {
    background-color: #c82333;
    border-color: #bd2130;
}

.btn-warning {
    background-color: #ffc107;
    border-color: #ffc107;
    color: var(--text-dark);
}

.btn-warning:hover {
    background-color: #e0a800;
    border-color: #d39e00;
    color: var(--text-dark);
}

.btn-secondary {
    background-color: #6c757d;
    border-color: #6c757d;
}

.btn-secondary:hover {
    background-color: #5a6268;
    border-color: #545b62;
}

/* Responsive design */
@media (max-width: 480px) {
    .calculator-container {
        padding: 1.5rem;
        max-width: 350px;
    }
    
    .display-input {
        font-size: 1.5rem;
        min-height: 60px;
        padding: 0.8rem;
    }
    
    .calc-btn {
        height: 60px;
        font-size: 1.3rem;
        border-radius: 10px;
    }
}