:root {
    --primary-color: #0A192F;
    --accent-color: #64FFDA;
    --text-color: #8892B0;
    --cta-color: #FF7675;
    --background-gradient: radial-gradient(circle, rgb(255, 87, 34), transparent);
    --font-family-title: 'Roboto', sans-serif;
    --font-family-body: 'Montserrat', sans-serif;
    --transition-speed: 0.3s;
}

body {
    margin: 0;
    padding: 0;
    background-color: var(--primary-color);
    color: var(--text-color);
    font-family: var(--font-family-body);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-title);
    font-weight: 700;
    color: var(--accent-color);
    margin-bottom: 20px;
}

p {
    font-size: 1rem;
    margin-bottom: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--primary-color);
    padding: 20px 40px;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 30px;
}

nav a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 1rem;
    transition: color var(--transition-speed) ease;
}

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

header {
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--background-gradient);
    animation: aurora-move 15s linear infinite;
}

header img {
    width: 320px;
    height: 320px;
    border-radius: 50%;
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

.section {
    padding: 100px 20px;
}

.card {
    background-color: #ffffff;
    color: #000000;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.2);
    padding: 20px;
    transition: transform var(--transition-speed) ease, box-shadow var(--transition-speed) ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

.image-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

button.cta {
    background-color: var(--cta-color);
    color: #ffffff;
    border: none;
    padding: 15px 30px;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color var(--transition-speed) ease, transform var(--transition-speed) ease;
}

button.cta:hover {
    background: var(--accent-color);
    transform: scale(1.05);
}

pre {
    background-color: #1e1e1e;
    color: #dcdcdc;
    padding: 20px;
    border-radius: 5px;
    overflow-x: auto;
    font-family: 'Courier New', Courier, monospace;
    font-size: 0.9rem;
}

footer {
    background-color: var(--primary-color);
    color: var(--text-color);
    text-align: center;
    padding: 40px 20px;
}

.background-animation {
    background: radial-gradient(circle, rgba(255,87,34,1) 0%, rgba(0,0,0,0) 70%);
    animation: aurora-move 15s linear infinite;
}

@keyframes aurora-move {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@media (max-width: 768px) {
    .container {
        padding: 20px 10px;
    }
    nav ul {
        flex-direction: column;
        gap: 15px;
    }
}

@media (max-width: 480px) {
    header img {
        width: 200px;
        height: 200px;
    }
    nav {
        padding: 15px 20px;
    }
    .image-grid {
        grid-template-columns: 1fr;
    }
}