body {
    background-color: #1a1a1a;
    color: #ffffff;
    font-family: 'Helvetica', sans-serif;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    padding: 20px;
    text-align: center;
    flex-grow: 1;
}

h1 {
    font-size: 40px;
    margin-bottom: 10px;
    color: #00b7ff;
    transition: color 0.3s ease;
}

h1:hover {
    color: #ffffff;
}

.subtitle {
    font-size: 18px;
    color: #ccc;
}

form {
    max-width: 600px;
    margin: 20px auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.input-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: 15px;
    width: 100%;
    max-width: 280px;
}

label {
    margin-bottom: 5px;
    text-align: center;
    width: 100%;
    font-size: 18px;
}

input[type="number"] {
    width: 100%;
    max-width: 280px;
    padding: 8px;
    background-color: #fff;
    border: 1px solid #555;
    color: #000;
    border-radius: 5px;
    font-size: 16px;
}

input[type="checkbox"] {
    margin-right: 10px;
}

.btn-calculate {
    background-color: #0071e3;
    color: #fff;
    padding: 15px 30px;
    border: none;
    border-radius: 5px;
    font-size: 18px;
    cursor: pointer;
    margin-top: 20px;
    transition: background-color 0.3s ease;
}

.btn-calculate:hover {
    background-color: #005bb5;
}

.btn-express {
    margin-top: 10px;
    padding: 10px 20px;
}

.warning {
    color: #ff4444;
    font-size: 16px;
    margin: 20px 0;
}

.note {
    color: #ff4444;
    font-size: 16px;
    margin: 10px 0;
}

.ad-container {
    margin: 20px auto;
    min-height: 90px;
    background-color: #444;
    width: 100%;
    max-width: 728px;
}

.savings {
    font-size: 48px;
    font-weight: bold;
    color: #00cc00;
}

.savings-total {
    font-size: 56px;
    font-weight: bold;
    color: #ff4444;
    margin-top: 20px;
}

h3 {
    font-size: 24px;
    color: #ddd;
    margin: 20px 0 10px;
}

.fuel-liters-box {
    background-color: #fff;
    color: #000;
    padding: 8px;
    border-radius: 5px;
    margin: 5px auto 20px auto; /* Ajustado para espaciado */
    max-width: 300px;
    font-size: 16px;
}

.fuel-liters-box p {
    margin: 0; /* Elimina margen interno para alinear con el texto superior */
}

.btn-youtube {
    background-color: #ff0000;
    color: #fff;
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 5px;
    margin: 10px;
    display: inline-flex;
    align-items: center;
    font-size: 18px;
    transition: background-color 0.3s ease;
}

.btn-youtube .play-icon {
    margin-right: 8px;
    font-size: 14px;
}

.btn-youtube:hover {
    background-color: #cc0000;
}

.btn-x {
    background-color: #000000;
    color: #fff;
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 5px;
    margin: 10px;
    display: inline-flex;
    align-items: center;
    font-size: 18px;
    transition: background-color 0.3s ease;
}

.btn-x .x-icon {
    margin-right: 8px;
    font-size: 16px;
}

.btn-x:hover {
    background-color: #333333;
}

.btn-instagram {
    background-color: #e1306c;
    color: #fff;
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 5px;
    margin: 10px;
    display: inline-flex;
    align-items: center;
    font-size: 18px;
    transition: background-color 0.3s ease;
}

.btn-instagram .instagram-icon {
    margin-right: 8px;
    font-size: 16px;
}

.btn-instagram:hover {
    background-color: #c13584;
}

.btn-surprise {
    background-color: #ff0000;
    color: #000;
    padding: 15px 30px;
    border: none;
    border-radius: 5px;
    font-size: 18px;
    cursor: pointer;
    margin: 10px;
    font-weight: bold;
    text-shadow: 0 0 3px #fff;
}

.btn-back {
    background-color: #555;
    color: #fff;
    padding: 12px 25px;
    text-decoration: none;
    border-radius: 5px;
    margin: 10px;
    display: inline-flex;
    align-items: center;
    font-size: 18px;
    transition: background-color 0.3s ease;
}

.btn-back:hover {
    background-color: #777;
}

.social-buttons {
    margin: 20px 0;
    display: flex;
    justify-content: center;
    gap: 20px;
}

.share-section {
    margin: 20px 0;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

.share-section p {
    margin: 0;
    font-size: 14px;
    color: #ccc;
}

.share-btn {
    padding: 8px 12px;
    font-size: 14px;
    text-decoration: none;
    border-radius: 5px;
    border: none;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.share-btn:hover {
    opacity: 0.8;
}

.share-x {
    background-color: #000000;
    color: #fff;
}

.share-facebook {
    background-color: #1877f2;
    color: #fff;
}

.share-copy {
    background-color: #555;
    color: #fff;
}

.share-whatsapp {
    background-color: #25D366; /* Verde oficial de WhatsApp */
    color: #fff;
}

.share-telegram {
    background-color: #7289DA; /* Lila suave */
    color: #fff;
}

.about-image {
    width: 100%;
    max-width: 300px;
    height: auto;
    margin: 20px 0;
    border-radius: 10px;
}

.video-iframe {
    width: 100%;
    max-width: 560px;
    height: 315px;
    margin: 20px auto;
    display: block;
}

#footer {
    background-color: #333;
    padding: 10px;
    text-align: center;
    width: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
}

#footer .menu {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: center;
    gap: 20px;
}

#footer .menu li {
    margin: 0;
}

#footer .menu a {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
}

.social-icon {
    color: #fff;
    font-size: 20px;
    text-decoration: none;
}

.instagram-icon:hover {
    color: #e1306c;
}

@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    .input-group {
        max-width: 210px;
    }

    input[type="number"] {
        max-width: 210px;
    }

    h1 {
        font-size: 32px;
    }

    label {
        font-size: 16px;
    }

    .ad-container {
        max-width: 320px;
    }

    .about-image {
        max-width: 200px;
    }

    .video-iframe {
        max-width: 100%;
        height: 200px;
    }

    .social-buttons {
        flex-direction: column;
        gap: 10px;
    }

    .share-section {
        flex-direction: column;
        gap: 10px;
    }

    #footer {
        flex-direction: column;
        gap: 10px;
    }

    #footer .menu {
        flex-direction: column;
        gap: 10px;
    }
}