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

:root {
    --primary-dark: #0a192f;
    --secondary-dark: #112240;
    --accent-blue: #64ffda;
    --accent-purple: #a890fe;
    --accent-green: #6ee7b7;
    --text-light: #e6f1ff;
    --text-gray: #8892b0;
    --transition: all 0.25s cubic-bezier(0.645, 0.045, 0.355, 1);
}

body {
    font-family: "Open Sans", sans-serif;
    background-color: var(--primary-dark);
    color: var(--text-light);
    line-height: 1.6;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: rgba(10, 25, 47, 0.85);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(168, 144, 254, 0.1);
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-family: "Montserrat", sans-serif;
    font-weight: 700;
    font-size: 1.8rem;
    background: linear-gradient(
        90deg,
        var(--accent-blue),
        var(--accent-purple)
    );
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin-left: 30px;
}

nav ul li a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
    padding: 5px 0;
}

nav ul li a:hover,
nav ul li a.active {
    color: var(--accent-purple);
}

nav ul li a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-purple);
    transition: var(--transition);
}

nav ul li a:hover::after,
nav ul li a.active::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-light);
    margin: 3px 0;
    transition: var(--transition);
}

.hero {
    height: 100vh;
    background: linear-gradient(rgba(10, 25, 47, 0.7), rgba(10, 25, 47, 0.9)),
        url("../images/aurora-banner.png");
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    padding-top: 80px;
}

.hero-content {
    max-width: 800px;
    padding: 0 20px;
}

.hero-content h1 {
    font-family: "Montserrat", sans-serif;
    font-size: 3rem;
    margin-bottom: 20px;
    line-height: 1.2;
    background: linear-gradient(
        90deg,
        var(--accent-blue),
        var(--accent-purple)
    );
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    max-width: 700px;
    text-justify: auto;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    background: transparent;
    border: 1px solid var(--accent-purple);
    color: var(--accent-purple);
    text-decoration: none;
    font-weight: 500;
    border-radius: 4px;
    transition: var(--transition);
    font-size: 1rem;
}

.btn:hover {
    background: rgba(168, 144, 254, 0.1);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.cards-section {
    padding: 100px 0;
    background-color: var(--secondary-dark);
}

.cards-section h2 {
    font-family: "Montserrat", sans-serif;
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 50px;
    position: relative;
}

.cards-section h2::after {
    content: "";
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(
        90deg,
        var(--accent-blue),
        var(--accent-purple)
    );
    border-radius: 2px;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.card {
    background: rgba(17, 34, 64, 0.7);
    border-radius: 8px;
    overflow: hidden;
    transition: var(--transition);
    text-decoration: none;
    color: inherit;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(168, 144, 254, 0.1);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    border-color: rgba(168, 144, 254, 0.3);
}

.card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-content {
    padding: 20px;
}

.card-content h3 {
    font-family: "Montserrat", sans-serif;
    font-size: 1.4rem;
    margin-bottom: 10px;
    color: var(--accent-blue);
}

.card-content p {
    color: var(--text-gray);
}

.content-section {
    padding: 150px 0 100px;
}

.content-section h1 {
    font-family: "Montserrat", sans-serif;
    font-size: 2.5rem;
    margin-bottom: 40px;
    text-align: center;
    position: relative;
}

.content-section h1::after {
    content: "";
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(
        90deg,
        var(--accent-blue),
        var(--accent-purple)
    );
    border-radius: 2px;
}

.content-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.content-grid.reverse {
    direction: rtl;
}

.content-grid.reverse .content-text {
    direction: ltr;
}

.content-grid.reverse .content-image {
    direction: ltr;
}

.content-text p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: var(--text-gray);
    text-justify: auto;
}

.content-image img {
    width: 100%;
    border-radius: 8px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.video-section {
    margin-bottom: 60px;
}

.video-section h2 {
    font-family: "Montserrat", sans-serif;
    font-size: 2rem;
    margin-bottom: 30px;
    color: var(--accent-blue);
}

.video-container {
    margin-bottom: 30px;
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.video-container iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.curiosities-section h2 {
    font-family: "Montserrat", sans-serif;
    font-size: 2rem;
    margin-bottom: 30px;
    color: var(--accent-blue);
}

.curiosities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.curiosity-card {
    background: rgba(17, 34, 64, 0.7);
    padding: 30px;
    border-radius: 8px;
    border: 1px solid rgba(168, 144, 254, 0.1);
    transition: var(--transition);
}

.curiosity-card:hover {
    transform: translateY(-5px);
    border-color: rgba(168, 144, 254, 0.3);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.curiosity-card h3 {
    font-family: "Montserrat", sans-serif;
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--accent-purple);
}

.curiosity-card p {
    color: var(--text-gray);
    line-height: 1.7;
}

.references-section {
    margin-bottom: 50px;
}

.references-section h2,
.credits-section h2 {
    font-family: "Montserrat", sans-serif;
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--accent-blue);
}

.references-list {
    list-style-type: none;
    counter-reset: item;
    margin: 0;
    padding: 0;
}

.references-list li {
    counter-increment: item;
    margin-bottom: 15px;
    padding-left: 30px;
    position: relative;
    color: var(--text-gray);
}

.references-list li::before {
    content: counter(item);
    position: absolute;
    left: 0;
    top: 0;
    color: var(--accent-purple);
    font-weight: bold;
}

.credits-section ul {
    list-style-type: none;
    padding-left: 20px;
}

.credits-section ul li {
    margin-bottom: 10px;
    position: relative;
    padding-left: 20px;
    color: var(--text-gray);
}

.credits-section ul li::before {
    content: "•";
    color: var(--accent-purple);
    position: absolute;
    left: 0;
    top: 0;
}

footer {
    background-color: var(--secondary-dark);
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid rgba(168, 144, 254, 0.1);
}

footer p {
    color: var(--text-gray);
}

@media screen and (max-width: 992px) {
    .content-grid {
        grid-template-columns: 1fr;
    }

    .content-grid.reverse {
        direction: ltr;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }
}

@media screen and (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    nav ul {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--secondary-dark);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 20px 0;
    }

    nav ul.active {
        left: 0;
    }

    nav ul li {
        margin: 15px 0;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .cards-section h2 {
        font-size: 2rem;
    }

    .content-section h1 {
        font-size: 2rem;
    }
}

@media screen and (max-width: 576px) {
    .hero {
        height: auto;
        padding: 150px 0 100px;
    }

    .hero-content h1 {
        font-size: 1.8rem;
    }

    .cards {
        grid-template-columns: 1fr;
    }

    .video-container {
        padding-bottom: 56.25%;
    }
}

.hero-content p,
.card-content p,
.content-text p,
.curiosity-card p {
    text-align: justify;
}