/* Reset básico */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* General */
body {
    font-family: Arial, sans-serif;
    background-color: #f4f4f4;
    color: #333;
    line-height: 1.6;
    padding-bottom: 2rem;
}

/* Header */
header {
    background-color: #333;
    padding: 1rem;
}

header ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2rem;
}

header a {
    color: white;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.2s;
}

header a:hover {
    color: #00bcd4;
}

/* Main contenido */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 1rem;
}

#inicio {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 70vh;
    /* Ocupa gran parte de la pantalla */
    background: linear-gradient(135deg, #00796b, #004d40);
    color: #e0f2f1;
    text-align: center;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 8px 20px rgba(0, 121, 107, 0.6);
    animation: fadeInUp 1s ease forwards;
}

#inicio h1 {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: 1rem;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
}

#inicio h2 {
    font-size: 1.8rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    text-shadow: 1px 1px 5px rgba(0, 0, 0, 0.3);
}

#inicio h3 {
    font-size: 1.2rem;
    font-weight: 400;
    font-style: italic;
    color: #b2dfdb;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.2);
    margin-top: 1.5rem;
}

/* Botón llamativo opcional */
#inicio .btn-accion {
    margin-top: 2rem;
    padding: 0.8rem 2rem;
    background-color: #004d40;
    color: #e0f2f1;
    border: none;
    border-radius: 30px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 5px 15px rgba(0, 77, 64, 0.6);
    transition: background-color 0.3s, transform 0.3s;
}

#inicio .btn-accion:hover {
    background-color: #00796b;
    transform: scale(1.05);
}

/* Animación fadeInUp */
/*ESTO GENERA QUE EL RECUADRO APAREZCA LENTAMENTE PARA COMPROBAR REFRESCAR PAGINA*/
@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }

    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Layout horizontal de imagen + tarjetas */
.seccion-contenido {
    display: flex;
    gap: 2rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

/* Tarjeta con imagen (izquierda) */
#tarjeta-imagen {
    flex: 1;
    min-width: 300px;
    background-color: #e0f7fa;
    border-radius: 8px;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 5rem;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

#texto-img h1 {
    margin-bottom: 0.5rem;
    color: #00796b;
}

#texto-img h2 {
    font-weight: normal;
    color: #004d40;
}

#tarjeta-imagen img {
    max-width: 100%;
    border-radius: 8px;
    object-fit: cover;
}

/* Tarjetas en columna (derecha) */
#tarjeta-divs {
    flex: 1;
    min-width: 300px;
}

.tarjetas-container {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

/* Tarjeta individual - perspectiva para efecto 3D */
.tarjeta {
    perspective: 1000px;
    cursor: pointer;
    width: 100%;
    height: 180px;
}

/* Contenedor interno que rota */
.tarjeta-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s;
    transform-style: preserve-3d;
    border-radius: 10px;
}

/* Cuando se agrega la clase rotar */
.tarjeta.rotar .tarjeta-inner {
    transform: rotateY(180deg);
}

/* Frente y reverso */
.tarjeta-front,
.tarjeta-back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: 10px;
    padding: 1.5rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    background-color: #ffffff;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.tarjeta-back {
    transform: rotateY(180deg);
    background-color: #00796b;
    color: white;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* Hover para agrandar */
.tarjeta:hover {
    transform: scale(1.05);
}

/* Footer */
footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 2rem 1rem;
    margin-top: 3rem;
}

footer h1 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

footer button {
    background-color: #00bcd4;
    border: none;
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
    color: white;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

footer button:hover {
    background-color: #0097a7;
}

/* Formulario contacto */
#contacto {
    max-width: 600px;
    margin: 3rem auto;
    background-color: #ffffff;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

#contacto h2 {
    margin-bottom: 1rem;
    color: #00796b;
    text-align: center;
}

#contacto label {
    display: block;
    margin: 0.5rem 0 0.2rem;
    font-weight: bold;
    color: #333;
}

#contacto input,
#contacto textarea {
    width: 100%;
    padding: 0.6rem;
    border-radius: 5px;
    border: 1px solid #ccc;
    font-size: 1rem;
}

#contacto button {
    margin-top: 1rem;
    background-color: #00796b;
    color: white;
    border: none;
    padding: 0.8rem 1.2rem;
    font-size: 1rem;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#contacto button:hover {
    background-color: #004d40;
}

/* Modo oscuro */
body.dark-mode {
    background-color: #121212;
    color: #e0e0e0;
}

body.dark-mode header {
    background-color: #1f1f1f;
}

body.dark-mode footer {
    background-color: #1f1f1f;
}

body.dark-mode #tarjeta-imagen {
    background-color: #263238;
    color: #e0e0e0;
}

body.dark-mode .tarjeta-front {
    background-color: #37474f !important;
    color: #e0e0e0;
}

body.dark-mode .tarjeta-back {
    background-color: #004d40 !important;
    color: #b2dfdb;
}

body.dark-mode #contacto {
    background-color: #263238;
    color: #e0e0e0;
}

body.dark-mode #contacto input,
body.dark-mode #contacto textarea {
    background-color: #455a64;
    color: #e0e0e0;
    border: 1px solid #78909c;
}