#ch-convertir-hora {
    max-width: 380px;
    margin: 30px auto;
    padding: 20px 25px;
    background-color: #f9fbfc;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    font-family: 'Poppins', sans-serif;
    color: #7c0a02;
    user-select: none;
}

#ch-convertir-hora label {
    display: block;
    margin-bottom: 10px;
    font-weight: 700;
    font-size: 16px;
    letter-spacing: 0.03em;
    color: #7c0a02;
}

#ch-convertir-hora select#hora {
    width: 100%;
    padding: 10px 14px;
    font-size: 16px;
    font-weight: 600;
    color: #000000;
    border: 2px solid #7c0a02;
    border-radius: 8px;
    background-color: #ffffff;
    cursor: pointer;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    appearance: none;
    background-image:
        linear-gradient(45deg, transparent 50%, #7c0a02 50%),
        linear-gradient(135deg, #7c0a02 50%, transparent 50%),
        linear-gradient(to right, #ccc, #ccc);
    background-position:
        calc(100% - 20px) calc(1em + 2px),
        calc(100% - 15px) calc(1em + 2px),
        calc(100% - 25px) 0.5em;
    background-size: 5px 5px, 5px 5px, 1px 1.5em;
    background-repeat: no-repeat;
}

#ch-convertir-hora select#hora:hover,
#ch-convertir-hora select#hora:focus {
    border-color: #520601;
    box-shadow: 0 0 6px rgba(124, 10, 2, 0.6);
    outline: none;
}

#ch-convertir-hora p#Texto24h {
    margin-top: 22px;
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 0.02em;
    color: #7c0a02;
    text-align: center;
    user-select: text;
}

#ch-convertir-hora #resultado-24h {
    display: inline-block;
    margin-left: 8px;
    font-weight: 900;
    font-size: 19px;
    color: #000000;
    font-family: 'Courier New', Courier, monospace;
}