/* Reset and base styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #1a1a1a, #303030);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

.container {
    width: 100%;
    max-width: 1200px;
    padding: 2rem;
}

/* Header styles */
header {
    text-align: center;
    margin-bottom: 3rem;
    color: #fff;
}

header h1 {
    font-size: 3.5rem;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    font-weight: 800;
    background: linear-gradient(90deg, #ff6b6b, #4ecdc4);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.tagline {
    font-size: 1.2rem;
    opacity: 0.8;
}

/* Card styles */
.version-cards {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 2rem;
    width: 100%;
    max-width: 400px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
    color: #fff;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.card h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
    color: #fff;
}

.card p {
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
    opacity: 0.8;
}

.features {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.features span {
    background: rgba(255, 255, 255, 0.1);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
}

.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    background: linear-gradient(90deg, #ff6b6b, #ff8e53);
    color: white;
    text-decoration: none;
    border-radius: 30px;
    font-weight: bold;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 1rem;
    box-shadow: 0 4px 15px rgba(255, 107, 107, 0.4);
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 7px 20px rgba(255, 107, 107, 0.6);
}

/* Footer styles */
footer {
    text-align: center;
    margin-top: 3rem;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    header h1 {
        font-size: 2.5rem;
    }
    
    .card {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 1rem;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .card {
        padding: 1rem;
    }
}