:root {
    --primary: #2ecc71;
    --primary-dark: #27ae60;
    --dark: #1a1a1a;
    --light: #f4f4f4;
    --white: #ffffff;
    --gray: #888;
    --shadow: 0 4px 6px rgba(0,0,0,0.1);
    --radius: 8px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--light);
    color: var(--dark);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    background: var(--dark);
    color: var(--white);
    padding: 1rem 0;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary);
}

.hero {
    background: linear-gradient(135deg, var(--dark) 0%, #333 100%);
    color: var(--white);
    padding: 4rem 2rem;
    border-radius: var(--radius);
    text-align: center;
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: var(--primary);
    color: var(--white);
    text-decoration: none;
    border-radius: var(--radius);
    font-weight: bold;
    transition: background 0.3s ease;
}

.btn:hover {
    background: var(--primary-dark);
}

.card {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

/* Responsive Navigation */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Media Queries */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    nav {
        flex-wrap: wrap;
    }

    .menu {
        display: none;
        width: 100%;
        flex-direction: column;
        background: var(--dark);
        padding: 1rem 0;
        margin-top: 1rem;
    }

    .menu.active {
        display: flex;
    }

    .menu a {
        margin: 0.5rem 0;
        padding-left: 2rem;
    }

    .hero {
        padding: 2rem 1rem;
    }

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

    .container {
        padding: 1rem;
    }
}

@media (max-width: 480px) {
    .logo {
        font-size: 1.2rem;
    }

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