@import url('https://fonts.googleapis.com/css2?family=Teachers:ital,wght@0,400..800;1,400..800&display=swap');

:root {
    --color-letras: #d7eaea;
    --color-links: #00ffff;
    --color-links-hover: #00d1d1;
    --color-links-visited: #006666;
    --color-background: #0e0f0f;
    --color-subbackground: #1d2222;
    --color-nav-hover: #0e60609e;
    --overlay-color: rgba(0, 0, 0, 0.95);
    --color-button: #00ffff;
    --color-button-hover: #00d1d1;
    --color-button-active: #006666;
}

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

/* BODY, HEADER MAIN FOOTER */
body {
    font-family: "Teachers", sans-serif;
    font-optical-sizing: auto;
    font-style: normal;
    font-size: 20px;
    font-weight: 400;
    background-color: var(--color-background);
    background-image: url('../images/background01.jpg');
    background-size: cover;
    background-attachment: fixed;
    color: var(--color-letras);
    position: relative;
    z-index: 0;
}

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--overlay-color);
    z-index: -1;
}

header {
    background-color: var(--color-subbackground);
    text-align: center;
    padding: 10px 0;
}

header h1 {
    color: var(--color-letras);
}

main {
    padding: 0px 11%;
}

footer {
    text-align: center;
    padding: 0px;
}

footer a {
    color: var(--color-letras);
    border-top: 1px solid var(--color-letras);
    padding: 20px;
}

footer a:hover {
    text-decoration: underline;
}

/* SECCIONES */
h1 {
    color: var(--color-letras);
    font-size: xx-large;
}

h2 {
    border: 2px solid var(--color-letras);
    padding: 5px;
    position: relative;
    z-index: 0;
    background-image: url('../images/background02.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    color: var(--color-letras);
}

h2::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--overlay-color);
    z-index: -1;
}

h3 {
    color: var(--color-letras);
}

/* LINKS */
a {
    color: var(--color-links);
    text-decoration: none;
}

a:hover {
    color: var(--color-links-hover);
    text-decoration: underline;
}

a:visited {
    color: var(--color-links-visited);
}

/* SECCIONES */
section {
    margin-bottom: 5%;
    margin-top: 5%;

}

section h2 {
    padding: 5%;
    margin-bottom: 5%;
    margin-top: 5%;
    text-align: center;
}

section h3 {
    border-bottom: 1px solid var(--color-letras);
    padding-bottom: 20%;
    margin-bottom: 20%;
}

p {
    line-height: 1.6;
    margin-bottom: 5%;
}

.centered {
    padding: 1%;
    text-align: center;
}

.justified {
    width: 100%;
    padding-left: 25%;
    padding-right: 25%;
    text-align: justify;
}

article {
    padding: 12%;
    border: 1px solid var(--color-letras);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

article p {
    font-size: medium;
    margin-bottom: 5%;
}

ul {
    list-style: none;
    margin-left: 0;
    padding-left: 0;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(3, minmax(200px, 1fr));
    gap: 2%;
}

.banner {
    border: 1px solid var(--color-letras);
    background-color: var(--color-background);
    text-align: center;
    padding: 20px;
}

.button {
    padding: 2px;
    margin: auto;
    width: 100%;
}

#paypal-container-XXJQD9ERGYJA2 {
    align-items: center;
    padding: 1px;
    border-top: 1px solid var(--color-letras);
}

/* Barra de navegación horizontal */
.navbar {
    display: flex;
    justify-content: space-around;
    list-style: none;
    padding: 0;
    margin: 0;
}

.navbar li {
    padding: 0;
}

.navbar a {
    display: block;
    padding: 15px;
    color: var(--color-letras);
    text-decoration: none;
}

.navbar a:hover {
    background-color: var(--color-nav-hover);
    border-radius: 2px;
}

/* LOGO */
.logo img {
    width: 100%;
    height: auto;
}

.media {
    max-width: 100%;
    max-height: 300px;
    width: 100%;
    height: 160px;
    object-fit: contain;
}

/* PLAY BUTTON */
.play-button {
    background-color: var(--color-button);
    color: var(--color-background);
    border: none;
    padding: 15px 30px;
    font-size: 1rem;
    cursor: pointer;
    border-radius: 5px;
    transition: background-color 0.3s ease;
    text-align: center;
    margin-top: auto;
}

.play-button:hover {
    background-color: var(--color-button-hover);
}

.play-button:active {
    background-color: var(--color-button-active);
}

@media (max-width: 768px) {
    .grid-container {
        grid-template-columns: repeat(2, 1fr);
        margin-bottom: 60%;
    }

    .navbar {
        flex-direction: column;
    }

    .navbar li {
        width: 100%;
        text-align: center;
    }

    .navbar a {
        padding: 10px;
        border-bottom: 1px solid var(--color-letras);
    }

    .justified {
        width: 100%;
        padding-left: 5%;
        padding-right: 5%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .grid-container {
        grid-template-columns: 1fr;
    }
}