:root {
    --primary-color: #6A0DAD;
    --secondary-color: #bebebe;
    --dark-gray: #333333;
    --darker-gray: #252525;
    --light-gray: #d8d8d8;
    --accent-color: #8A2BE2;
    --font-primary: 'Poppins', sans-serif;
    --font-secondary: 'Questrial', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--darker-gray);
    font-family: var(--font-secondary);
    color: #e0e0e0;
    line-height: 1.6;
}

h1, h2, h3 {
    font-family: var(--font-primary);
}

h1 { font-size: xx-large; }
h2 { font-size: x-large; }
h3 { font-size: large; }

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
    display: block;
}

main {
    background-color: var(--dark-gray);
}


/* ================================================ */
/* HEADER Y NAVEGACIÓN                             */
/* ================================================ */
#header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--darker-gray);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    opacity: 0;
    transition: opacity .15s ease-in;
}

#header.visible {
    opacity: 1;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
}

.nav-container .logo h1 {
    color: #fff;
    font-size: 1.8rem;
}

.nav-links {
    display: flex;
    gap: 20px;
    list-style: none;
}

.nav-links li a {
    color: #fff;
    font-weight: 500;
    transition: color .3s;
}

.nav-links li a:hover {
    color: var(--accent-color);
}

.nav-links .btn-join {
    padding: 8px 15px;
    border-radius: 25px;
    background-color: #fff;
    color: var(--primary-color);
    font-weight: 600;
}

/* ================================================ */
/* FOOTER                                           */
/* ================================================ */
.footer-container {
    background-color: var(--darker-gray);
    color: var(--light-gray);
    padding: 4rem 2rem;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    gap: 3rem;
    max-width: 1200px;
    margin: 0 auto;
    text-align: left;
}

.footer-section {
    flex: 1;
    min-width: 220px;
}

.footer-section h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.footer-section p,
.footer-section li {
    color: #ddd;
    margin: 0 0 .5rem 0;
}

.footer-section ul {
    list-style: none;
}

.logo-group img {
    width: 100px;
    height: auto;
    object-fit: contain;
}

.social-icons a {
    display: inline-flex;
    justify-content: center;
    align-items: center;
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--darker-gray);
    color: var(--light-gray);
}

.footer-bottom p {
    color: #999;
    font-size: .8rem;
    margin-top: 2rem;
}