/* Variables globales */
:root {
    --hospital-blue: #0072CE;
    --scrubs-green: #2D8B7D;
    --light-blue: #E3F2FD;
    --pure-white: #FFFFFF;
    --text-dark: #2C3E50;
}

/* Reset y estilos generales */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    background-color: var(--light-blue);
    color: var(--text-dark);
    line-height: 1.6;
}

/* Enlaces generales */
a {
    text-decoration: none;
    color: var(--hospital-blue);
    transition: color 0.3s ease;
}

a:hover {
    color: var(--scrubs-green);
}

/* Header */
header {
    display: flex;
    align-items: center;
    background-color: var(--pure-white);
    padding: 10px 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.logo {
    flex: 0 0 auto;
    margin-right: 20px;
}

.logo img {
    height: 60px;
    width: auto;
}

/* Navegación */
nav {
    flex: 1;
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: flex-start;
    gap: 20px;
    margin: 0;
    padding: 0;
}

nav ul li a {
    color: var(--hospital-blue);
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

nav ul li a:hover {
    color: var(--scrubs-green);
    background-color: var(--light-blue);
}

nav ul li a.active {
    color: var(--pure-white);
    background-color: var(--hospital-blue);
}

/* Banner */
.banner {
    width: 100%;
    overflow: hidden;
}

.banner img {
    width: 100%;
    height: auto;
    display: block;
}

/* Sección de introducción */
.intro-text {
    background-color: var(--hospital-blue);
    color: var(--pure-white);
    padding: 40px 20px;
    text-align: center;
    margin: 20px 0;
}

.intro-text h1 {
    color: var(--pure-white);
    font-size: 2em;
    margin: 0;
}

/* Contenido principal */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Secciones */
section {
    margin-bottom: 40px;
}

h2 {
    color: var(--hospital-blue);
    text-align: center;
    margin-bottom: 30px;
    font-size: 1.8em;
}

/* Contenedores de eventos y libros */
.events-container,
.books-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    padding: 0 20px;
}

/* Tarjetas de evento y libro */
.event,
.book {
    background-color: var(--pure-white);
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,114,206,0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.event:hover,
.book:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 12px rgba(0,114,206,0.2);
}

.event h3,
.book h3 {
    color: var(--hospital-blue);
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--scrubs-green);
}

.book img {
    width: 100%;
    height: auto;
    border-radius: 4px;
    margin-bottom: 15px;
}

/* Footer */
footer {
    background-color: var(--hospital-blue);
    color: var(--pure-white);
    padding: 30px;
    text-align: center;
    margin-top: 40px;
}

footer a {
    color: var(--pure-white);
    margin: 0 10px;
}

footer a:hover {
    color: var(--light-blue);
}

/* Media Queries */
@media (max-width: 768px) {
    header {
        flex-direction: column;
        text-align: center;
    }

    .logo {
        margin: 0 0 20px 0;
    }

    nav ul {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }

    .events-container,
    .books-container {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

@media (max-width: 480px) {
    .intro-text h1 {
        font-size: 1.5em;
    }

    h2 {
        font-size: 1.4em;
    }

    .events-container,
    .books-container {
        grid-template-columns: 1fr;
    }
}