```css
/* =========================
   CONTACTO
========================= */

.contact-header {
    background: #000;
}


/* =========================
   SECCIÓN PRINCIPAL
========================= */

.contact-section {
    min-height: calc(100vh - 90px);
    background: #000;
    color: #fff;
    padding: 70px 5% 100px;
}

.contact-container {
    width: min(1180px, 100%);
    margin: auto;

    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 90px;
    align-items: start;
}


/* =========================
   INTRO
========================= */

.contact-intro {
    padding-top: 25px;
}

.contact-small {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 3px;
    margin-bottom: 22px;
    opacity: 0.8;
}

.contact-intro h1 {
    max-width: 560px;
    font-size: clamp(46px, 5vw, 72px);
    line-height: 1.02;
    letter-spacing: -3px;
    margin-bottom: 28px;
}

.contact-intro h1 span {
    display: block;
    font-weight: 300;
    color: #aaa;
}

.contact-description {
    max-width: 480px;
    color: #aaa;
    font-size: 18px;
    line-height: 1.7;
}


/* =========================
   FORMULARIO
========================= */

.contact-form {
    background: #111;
    border: 1px solid #222;
    border-radius: 22px;
    padding: 42px;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 10px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    background: #080808;
    color: #fff;

    border: 1px solid #333;
    border-radius: 12px;

    padding: 16px 18px;

    font-family: Arial, Helvetica, sans-serif;
    font-size: 16px;

    outline: none;

    transition:
        border-color 0.25s ease,
        background 0.25s ease;
}

.form-group input {
    height: 54px;
}

.form-group textarea {
    min-height: 150px;
    resize: vertical;
    line-height: 1.6;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #666;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: #fff;
    background: #0d0d0d;
}


/* =========================
   BOTÓN WHATSAPP
========================= */

.whatsapp-button {
    width: 100%;

    border: 0;
    border-radius: 50px;

    padding: 17px 25px;

    background: #fff;
    color: #111;

    font-size: 15px;
    font-weight: 700;

    cursor: pointer;

    transition:
        transform 0.3s ease,
        background 0.3s ease;
}

.whatsapp-button:hover {
    transform: translateY(-3px);
    background: #e9e9e9;
}

.form-note {
    margin-top: 16px;

    color: #777;

    font-size: 12px;
    line-height: 1.5;

    text-align: center;
}


/* =========================
   REDES SOCIALES
========================= */

.social-section {
    grid-column: 1 / -1;

    margin-top: 35px;
    padding-top: 45px;

    border-top: 1px solid #222;

    text-align: center;
}

.social-small {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 3px;

    color: #777;

    margin-bottom: 12px;
}

.social-section h2 {
    font-size: 26px;
    margin-bottom: 22px;
}

.social-links {
    display: flex;
    justify-content: center;
    align-items: center;

    gap: 35px;
    flex-wrap: wrap;
}

.social-links span {
    color: #aaa;

    font-size: 15px;
    font-weight: 700;
}

.social-coming {
    margin-top: 16px;

    color: #555;

    font-size: 12px;
}


/* =========================
   TABLET
========================= */

@media (max-width: 900px) {

    .contact-section {
        padding-top: 50px;
    }

    .contact-container {
        grid-template-columns: 1fr;
        gap: 50px;
    }

    .contact-intro {
        text-align: center;
        padding-top: 10px;
    }

    .contact-intro h1,
    .contact-description {
        margin-left: auto;
        margin-right: auto;
    }

    .contact-intro h1 {
        letter-spacing: -2px;
    }

    .social-section {
        grid-column: auto;
        margin-top: 10px;
    }

}


/* =========================
   MOBILE
========================= */

@media (max-width: 600px) {

    .contact-section {
        padding: 35px 6% 70px;
    }

    .contact-container {
        gap: 40px;
    }

    .contact-small {
        font-size: 11px;
        letter-spacing: 2.2px;
        margin-bottom: 18px;
    }

    .contact-intro h1 {
        max-width: 400px;

        font-size: 40px;
        line-height: 1.07;
        letter-spacing: -1px;

        margin-bottom: 22px;
    }

    .contact-description {
        max-width: 360px;
        font-size: 16px;
        line-height: 1.6;
    }

    .contact-form {
        padding: 27px 20px;
        border-radius: 18px;
    }

    .form-group {
        margin-bottom: 21px;
    }

    .form-group input {
        height: 52px;
    }

    .form-group textarea {
        min-height: 135px;
    }

    .whatsapp-button {
        padding: 16px 20px;
    }

    .social-section {
        padding-top: 35px;
    }

    .social-links {
        gap: 20px;
    }

}
```