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

body {
    margin: 0;
    margin-top: 20px;
    background-color: #003851;
    background-size: cover;
    color: white;
}


header {
    width: 100%;
}

#titobjetivos {
    text-align: center;
    padding: 10px;
    color: #ffffff;
    font-family: "Sekuya", system-ui;
    font-weight: 400;
    font-style: normal;
    font-size: 60px;
    background-color: #002535;
    background-size: cover;
    background-position: center;
}

#fraseob {
    color: #ffffff;
    font-family: "Sekuya", system-ui;
    text-align: center;
    font-style: normal;
    background-color: #002535;
    background-size: cover;
    background-position: center;
    padding-bottom: 12px;
    font-size: 26px;
}


nav ul {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 5px;
    margin: 0;
    font-size: 20px;
    list-style-type: none;
    display: flex;
    justify-content: center;
    background-color: #002535;
    z-index: 1000;
    border-bottom: solid 2px;
    border-color: #22646e;
    font-family: "EB Garamond", serif;
}

nav li {
    margin: 0 1rem;
}

nav li a {
    color: rgb(255, 255, 255);
    text-decoration: none;
}

nav li a:hover {
   color:#458e99;
}

.intro {
    text-align: center;
    margin: 50px auto 30px auto;
    max-width: 900px;
    padding: 20px;
}

.intro h1 {
    font-size: 45px;
    margin-bottom: 15px;
    font-family: "Sekuya", system-ui;
}

.intro p {
    font-size: 22px;
    line-height: 1.7;
    color: #d8f3ff;
    font-family: "EB Garamond", serif;
    font-optical-sizing: auto;
    font-weight: 500;
    font-style: normal;
}


/*Contenedor de tarjetas*/
.cards-container {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 30px;
    padding: 30px 40px 60px 40px;
}

/*Tarjetas*/
.flip-card {
    background-color: transparent;
    width: 350px;
    height: 450px;
    perspective: 1000px;
    flex: 0 1 240px;
}

/*Efecto zoom*/
.flip-card:hover {
    transform: scale(1.06);
    transition: transform 0.3s ease;
}

/*Interior*/
.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    text-align: center;
    transition: transform 0.8s;
    transform-style: preserve-3d;
}

/*Efecto vuelta*/
.flip-card:hover .flip-card-inner {
    transform: rotateY(180deg);
}

/*Caras*/
.flip-card-front,
.flip-card-back {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 30px;
    padding: 18px;
    backface-visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
}

/*Frente*/
.flip-card-front {
    background-color: #5dacf7;
    color: #002535;
}

.flip-card-front h2 {
    font-size: 26px;
    line-height: 1.3;
    font-family: "Sekuya", system-ui;
}

/*Reverso*/
.flip-card-back {
    background-color: #1d8085;
    color: white;
    transform: rotateY(180deg);
    overflow-y: auto;
}

.flip-card-back p {
    font-size: 20px;
    line-height: 1.45;
    text-align: center;
    font-family: "EB Garamond", serif;
    font-optical-sizing: auto;
    font-weight: 500;
    font-style: normal;
}


footer {
    background-color: #002535;
    border-top: solid 2px #22646e;
    text-align: center;
    padding: 20px;
    color: white;
    margin-top: 30px;
}