:root {
    --primary-color: #6a11cb;
    --secondary-color: #2575fc;
    --background-color: #f4f4f9;
    --text-color: #333;
    --card-background: rgba(255, 255, 255, 0.1);
    --card-border: rgba(255, 255, 255, 0.2);
    --shadow-color: rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --primary-color: #8e44ad;
    --secondary-color: #3498db;
    --background-color: #2c3e50;
    --text-color: #ecf0f1;
    --card-background: rgba(0, 0, 0, 0.2);
    --card-border: rgba(255, 255, 255, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.5);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: var(--background-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
}

header {
    background: var(--card-background);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--card-border);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.3s;
}

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

main {
    padding: 2rem;
}

section {
    padding: 4rem 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

#hero {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: left;
    min-height: 80vh;
}

.hero-content {
    max-width: 50%;
}

.hero-illustration {
    width: 50%;
    height: 400px;
}

.cta-button {
    background: linear-gradient(45deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 0.8rem 1.5rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: bold;
    transition: transform 0.3s, box-shadow 0.3s;
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px var(--shadow-color);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.card {
    background: var(--card-background);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--card-border);
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 8px 32px 0 var(--shadow-color);
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-10px);
}

.fade-in {
    opacity: 0;
    animation: fadeInAnimation 1s ease-in forwards;
}

@keyframes fadeInAnimation {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

footer {
    text-align: center;
    padding: 2rem;
    background: var(--card-background);
    border-top: 1px solid var(--card-border);
}

@media (max-width: 768px) {
    #hero {
        flex-direction: column;
        text-align: center;
    }

    .hero-content, .hero-illustration {
        max-width: 100%;
    }
}

#theme-toggle {
    background: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    cursor: pointer;
    transition: background 0.3s;
}

#theme-toggle:hover {
    background: var(--secondary-color);
}