.calculadora-modal {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #232629;
    border-radius: 10px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.25);
    z-index: 10000;
    min-width: 320px;
    min-height: 420px;
    color: #fff;
    font-family: 'Ubuntu', Arial, sans-serif;
}

.calculadora-header {
    background: #393e46;
    color: #fff;
    padding: 12px 16px;
    border-radius: 10px 10px 0 0;
    cursor: move;
    display: flex;
    align-items: center;
    gap: 10px;
    justify-content: space-between; 
}

.calculadora-close {
    margin-left: auto;
    cursor: pointer;
    font-size: 1.5em;
    font-weight: bold;
    color: #ffffff;
    transition: color 0.2s;
}
.calculadora-close:hover {
    color: #ff0000;
}

.calculadora-logo {
    width: 24px;
    height: 24px;
}

.calculadora-body {
    padding: 18px 18px 12px 18px;
}

#calculadoraDisplay {
    width: 100%;
    font-size: 2em;
    background: #232629;
    color: #fff;
    border: none;
    border-bottom: 2px solid #393e46;
    margin-bottom: 18px;
    text-align: right;
    padding: 8px 0;
    outline: none;
}

.calculadora-row {
    display: flex;
    gap: 10px;
    margin-bottom: 10px;
}

.calculadora-button {
    flex: 1;
    padding: 16px 0;
    font-size: 1.2em;
    background: #393e46;
    color: #fff;
    border: none;
    border-radius: 6px;
    transition: background 0.2s;
    cursor: pointer;
}
.calculadora-button:hover {
    background: #8b8b8b;
    color: #232629;
}

.calculadora-button.igual {
    background: #ff9800;
    color: #fff;
}
.calculadora-button.igual:hover {
    background: #ffa733;
    color: #232629;
}

.calculadora-button.operador:hover {
    background: #ff9800;
    color: #232629;
}