.input-area {
    background: white;
    padding: 8px;
    position: relative;
    border-radius: 0 0 8px 8px;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
}

#numero {
    /* width: 100%;
    padding: 8px 32px 8px 8px;
    font-size: 22px;
    border: 1px solid #ddd; */
    border-radius: 4px;
    text-align: center;
    letter-spacing: 6px;
    /* background-color: #f9f9fa; */
    transition: border-color 0.3s, box-shadow 0.3s;
}

#numero.ready {
    border-color: #4361ee;
    box-shadow: 0 0 6px rgba(67, 97, 238, 0.4);
}

.secure-icon {
    position: absolute;
    right: 16px;
    color: #4361ee;
    font-size: 18px;
}

.keyboard-container {
    display: flex;
    flex-direction: column;
    padding: 5px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.keyboard-row {
    display: flex;
    width: 100%;
    margin-bottom: 8px;
}

.keyboard-row:last-child {
    margin-bottom: 0;
}

.key {
    flex: 1;
    height: 50px;
    margin: 0 4px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 20px;
    font-weight: bold;
    background-color: #f0f2f5;
    color: #333;
    border-radius: 6px;
    border: none;
    box-shadow: 0 2px 3px rgba(0,0,0,0.1);
    touch-action: manipulation;
    -webkit-touch-callout: none;
    user-select: none;
}

.key:active {
    background-color: #e0e3e8;
    transform: translateY(1px);
}

.function-key {
    font-size: 16px;
    color: white;
}

.backspace {
    background-color: #ff9f1c;
}

.clear {
    background-color: #e71d36;
}

/* .footer {
    margin-top: 10px;
    text-align: center;
    font-size: 12px;
    color: #666;
    display: flex;
    align-items: center;
    justify-content: center;
}

.footer svg {
    margin-right: 5px;
} */

@media (max-height: 600px) {
    .key {
        height: 45px;
    }

    .keyboard-row {
        margin-bottom: 6px;
    }

    .footer {
        margin-top: 6px;
    }
}

@media (max-height: 500px) {
    .header {
        padding: 6px;
        font-size: 16px;
    }

    .input-area {
        padding: 6px;
    }

    .key {
        height: 40px;
        font-size: 18px;
    }
}