* {
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    max-width: 100%;
    overflow-x: hidden;
}

body {
    font-family: 'Arial', sans-serif;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

main {
    flex: 1;
}

ul {
    list-style: none;
}

html {
    scroll-behavior: smooth;
}

.introduccion {
    display: flex;
    flex-direction: column;
    text-align: center;
    padding: 5rem;
}

.introduccion h1 {
    font-size: 3rem;
    margin-bottom: 1vh;
}

.introduccion p {
    color: #333333;
}

.tarjetas-gen{
    display: flex;
    justify-content: center;
}

.tarjetas{
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    width: min(820px, 100%);
    gap: 2rem;
    align-items: center;
    justify-content: center;
    text-align: center
}

.tarjeta{
    background-color: #ffffff;
    border-radius: 16px;
    border: 1px solid #e5e5e5;
    overflow: hidden; 
    box-shadow: 13px 10px 0 #bfe5e4;
    max-width: 320px; 
    margin-bottom: 3rem;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.tarjeta:hover{
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
    transform: scale(1.04) translateY(-4px);
}

.img-servicio img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    display: block;
}

.text-tarjeta{
    padding: 2vh;
}

.text-tarjeta p{
    color: #333333;
    margin-bottom: 5vh;
    margin-top: 1vh;
}

.text-tarjeta a{
    text-decoration: none;
    color: #2975bc;
}

@media (max-width: 1024px) {
    .introduccion h1 { font-size: clamp(2.2rem, 6vw, 3.5rem); }
    .tarjeta, .text-tarjeta { min-width: 0; overflow-wrap: break-word; }
    .introduccion { padding: 4rem 2rem; }
    .tarjetas-gen { padding: 0 2rem; }
    .tarjetas { width: 100%; }
}

@media (max-width: 900px) {
    .introduccion { padding: 4rem 2rem; }
    .tarjetas-gen { padding: 0 2rem; }
    .tarjetas { width: 100%; }
}

@media (max-width: 650px) {
    .introduccion h1 { font-size: 2.3rem; }
    .introduccion p { line-height: 1.5; }
    .tarjetas-gen { padding: 0 1rem; margin-bottom: 6rem; }
    .tarjetas { grid-template-columns: 1fr; gap: 1rem; padding-left: 2rem; padding-right: 2rem;}
    .tarjeta { width: 100%; max-width: none; }
    .introduccion { padding-left: 2rem; padding-right: 2rem; }
    .tarjetas { grid-template-columns: 1fr; }
    .img-servicio img { height: 200px; background-size: cover; }
    .introduccion h1 {
        font-size: clamp(2rem, 9vw, 2.6rem);
        line-height: 1.15;
    }

    .introduccion p {
        font-size: 1rem;
        line-height: 1.5;
    }

    .text-tarjeta {
        padding: 1.25rem;
    }

    .text-tarjeta h2,
    .text-tarjeta h3 {
        font-size: 1.15rem;
        line-height: 1.25;
    }

    .text-tarjeta p {
        font-size: 0.95rem;
        line-height: 1.5;
        margin-bottom: 1.5rem;
    }
}