/* ── Reset ──────────────────────────────────────────────── */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

/* ── Base ───────────────────────────────────────────────── */
body {
    font-family: "Elm Sans", sans-serif;
    /* Evita reflow de fuente y mejora render */
    font-display: swap;
    /* Mejora suavizado de texto */
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeSpeed;
}

/* ── Imágenes: por defecto no se desbordan ──────────────── */
img {
    max-width: 100%;
    height: auto;
    /* Reserva espacio antes de cargar → evita layout shift (CLS) */
    content-visibility: auto;
    /* Placeholder gris mientras carga + fade-in al aparecer */
    opacity: 0;
    transition: opacity 0.5s ease;
    background-color: #f0f0f0;
}

img.img-loaded {
    opacity: 1;
}

/* ── Nav ────────────────────────────────────────────────── */
nav {
    background-color: #0F2854;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

h1 {
    font-size: 20px;
}

.NavText {
    color: white;
    text-decoration: none;
    margin: 0;
}

.botonNav {
    background-color: #BDE8F5;
    color: black;
    padding: 10px 20px;
    border-radius: 8px;
    transition: background-color 0.3s;
    font-weight: bold;
    /* Mejora performance de hover con will-change */
    will-change: background-color;
}

.botonNav:hover {
    background-color: #9fd4e3;
}



/* ── Spotify desplegable ───────────────────────────── */

.SpotifyCont{
    width: 90%;
    max-width: 700px;
    margin: 40px auto;
    text-align: center;
}

#toggleSpotify{
    display: none;
}

.BotonSpotify{
    display: inline-block;
    background-color: #1DB954;
    color: white;
    padding: 16px 28px;
    border-radius: 12px;
    cursor: pointer;
    font-weight: bold;
    transition: 0.3s;
    user-select: none;
}

.BotonSpotify:hover{
    transform: translateY(-2px);
    opacity: 0.92;
}

.BotonSpotify .cerrar{
    display: none;
}

#toggleSpotify:checked + .BotonSpotify .abrir{
    display: none;
}

#toggleSpotify:checked + .BotonSpotify .cerrar{
    display: inline;
}

.SpotifyBox{
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    margin-top: 0;
    transition:
        max-height 0.5s ease,
        opacity 0.4s ease,
        margin-top 0.4s ease;
}

.SpotifyBox iframe{
    border-radius: 14px;
}

#toggleSpotify:checked ~ .SpotifyBox{
    max-height: 300px;
    opacity: 1;
    margin-top: 20px;
}




/* ── Main (hero) ────────────────────────────────────────── */
main {
    background-color: #1C4D8D;
    padding: 100px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

main h2,
main h3 {
    color: white;
}

main h2 {
    font-size: 60px;
}

main h3 {
    font-size: 27px;
    margin-top: 12px;
}

.botonMain {
    background-color: #BDE8F5;
    color: black;
    padding: 20px 30px;
    border-radius: 8px;
    transition: background-color 0.3s;
    text-decoration: none;
    font-weight: bold;
    will-change: background-color;
}

.botonMain:hover {
    background-color: #9fd4e3;
}

.botonesMain {
    display: flex;
    gap: 15px;
    margin-top: 70px;
}

/* ── Servicios ──────────────────────────────────────────── */
.NServicios {
    background-color: #f5f5f5;
    padding: 80px 40px;
}

.NTxtT {
    font-size: 42px;
    margin-bottom: 50px;
    text-align: center;
}

.ContentServicios {
    display: flex;
    justify-content: center;
    gap: 40px;
    max-width: 1200px;
    margin: 0 auto;
}

.ContentServicios div {
    flex: 1;
    max-width: 380px;
    padding: 25px;
    background-color: white;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s;
    /* Evita que el hover dispare repaint en toda la página */
    will-change: transform;
}

.ContentServicios div:hover {
    transform: translateY(-5px);
}

.NTxt2 {
    font-size: 26px;
    margin: 15px 0 10px;
}

.NTxtP {
    font-size: 18px;
    line-height: 1.5;
}

/* Imágenes de servicios: tamaño real de display, no 800x500 */
.NServicios img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 10px;
    display: block;
    /* GPU layer para evitar repaint en scroll */
    transform: translateZ(0);
}

/* ── Por qué elegirnos ──────────────────────────────────── */
section {
    padding: 80px 40px;
}

section h2 {
    text-align: center;
    font-size: 40px;
    margin-bottom: 50px;
}

.ContentR {
    display: flex;
    justify-content: center;
    gap: 80px;
    max-width: 1200px;
    margin: 0 auto;
}

.Reconocimineto {
    flex: 1;
    max-width: 250px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.Reconocimineto img {
    width: 60px;
    height: 60px;
    object-fit: contain;
    margin-bottom: 15px;
}

.Reconocimineto h2 {
    font-size: 25px;
    text-align: center;
    margin: 10px 0;
}

.Reconocimineto p {
    font-size: 18px;
    color: #555;
}

/* ── Estudio / Certificaciones ──────────────────────────── */
.Estudio {
    text-align: center;
    padding: 60px 20px;
}

.Estudio img {
    width: 70px;
    height: 70px;
    object-fit: contain;
    margin-bottom: 15px;
}

.Estudio h2 {
    font-size: 32px;
    margin-bottom: 10px;
}

.Estudio h3 {
    font-size: 18px;
    color: #555;
    margin-bottom: 30px;
}

.ListaEstudio {
    background-color: #f5f5f5;
    padding: 25px;
    border-radius: 10px;
    width: 90%;
    max-width: 1000px;
    margin: 0 auto;
    text-align: left;
}

.ListaEstudio ul {
    list-style: disc;
    padding-left: 20px;
    width: 90%;
    margin: 0 auto 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #ddd;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.ListaEstudio li {
    font-size: 20px;
}

.ListaEstudio p {
    text-align: center;
    font-size: 18px;
    color: #444;
}

/* ── Contacto ───────────────────────────────────────────── */
#contacto {
    padding: 20px 20px 60px;
}

#contacto > h2 {
    text-align: center;
    margin-bottom: 25px;
    font-size: 35px;
}

.ContentContacto {
    max-width: 800px;
    margin: 0 auto;
}

.ContentContacto > div,
.ContentContacto > a {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 20px 0;
    border-bottom: 1px solid #ddd;
    text-decoration: none;
    color: inherit;
}

.ContentContacto > a:hover {
    background-color: #f5f5f5;
    border-radius: 8px;
    padding-left: 10px;
    transition: background-color 0.3s, padding-left 0.3s;
}

.ContentContacto img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}

.ContentContacto .texto {
    display: flex;
    flex-direction: column;
}

.ContentContacto h2 {
    margin: 0;
    font-size: 20px;
}

.ContentContacto h3 {
    margin: 5px 0;
    font-size: 16px;
    font-weight: normal;
    color: #333;
}

.ContentContacto p {
    margin: 0;
    font-size: 14px;
    color: #666;
}

#contacto > h3 {
    text-align: center;
    margin-top: 30px;
}

/* ── Footer ─────────────────────────────────────────────── */
footer {
    background-color: #0F2854;
    color: white;
    text-align: center;
    padding: 40px 20px;
}

footer h2 {
    font-size: 24px;
}

footer h3 {
    margin: 10px 0;
    font-size: 16px;
    font-weight: normal;
}

footer p {
    margin-top: 15px;
    font-size: 14px;
    opacity: 0.8;
}

/* ── Responsive 1024px ──────────────────────────────────── */
@media (max-width: 1024px) {
    main {
        padding: 70px 30px;
    }

    main h2 {
        font-size: 42px;
    }

    main h3 {
        font-size: 22px;
    }

    .botonesMain {
        flex-direction: column;
        align-items: center;
        width: 100%;
        gap: 15px;
        margin-top: 40px;
    }

    .botonMain {
        display: block;
        width: 90%;
        max-width: 320px;
        text-align: center;
    }

    .ContentServicios {
        flex-wrap: wrap;
        gap: 25px;
    }

    .ContentServicios div {
        max-width: 45%;
    }

    .ContentR {
        flex-wrap: wrap;
        gap: 45px;
    }

    .Reconocimineto {
        max-width: 45%;
    }
}

/* ── Responsive 768px ───────────────────────────────────── */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        gap: 12px;
        text-align: center;
        padding: 18px;
    }

    



    h1 {
        font-size: 18px;
    }

    main {
        padding: 55px 20px;
    }

    main h2 {
        font-size: 30px;
    }

    main h3 {
        font-size: 18px;
    }

    .botonesMain {
        flex-direction: column;
        align-items: center;
        width: 100%;
        gap: 15px;
        margin-top: 40px;
    }

    .botonMain {
        display: block;
        width: 90%;
        max-width: 320px;
        text-align: center;
    }

    .NServicios {
        padding: 60px 20px;
    }

    .ContentServicios {
        flex-direction: column;
        gap: 25px;
    }

    .ContentServicios div {
        max-width: 100%;
    }

    .ContentR {
        flex-direction: column;
        gap: 35px;
    }

    .Reconocimineto {
        max-width: 100%;
    }

    section {
        padding: 60px 20px;
    }

    section h2 {
        font-size: 32px;
    }

    .ListaEstudio {
        width: 100%;
        padding: 20px;
    }

    .ListaEstudio li {
        font-size: 16px;
    }

    .ContentContacto img {
        width: 34px;
        height: 34px;
    }

    .ContentContacto h2 {
        font-size: 18px;
    }

    .ContentContacto h3 {
        font-size: 14px;
    }

    .ContentContacto p {
        font-size: 13px;
    }
}

/* ── Responsive 480px ───────────────────────────────────── */
@media (max-width: 480px) {
    main h2 {
        font-size: 24px;
    }

    main h3 {
        font-size: 16px;
    }

    .botonesMain {
        flex-direction: column;
        align-items: center;
        width: 100%;
        gap: 15px;
        margin-top: 40px;
    }

    .botonMain {
        display: block;
        width: 90%;
        max-width: 320px;
        text-align: center;
    }

    .NTxtT,
    section h2 {
        font-size: 28px;
    }

    .NTxt2 {
        font-size: 22px;
    }

    .NTxtP {
        font-size: 16px;
    }

    .Reconocimineto p {
        font-size: 16px;
    }

    .Estudio h2 {
        font-size: 24px;
    }

    .Estudio h3 {
        font-size: 16px;
    }

    footer h2 {
        font-size: 20px;
    }

    footer h3 {
        font-size: 14px;
    }

    footer p {
        font-size: 12px;
    }
}