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

body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: linear-gradient(135deg, #1e1e2f, #2d2d44);
    color: #f0f0f0;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

header p {
    color: #b0b0c0;
    font-size: 1.1rem;
}

main {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
    max-width: 800px;
}

.card {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    padding: 25px;
    width: 300px;
    backdrop-filter: blur(6px);
}

.card h2 {
    margin-bottom: 15px;
    color: #8ab4ff;
}

.card ul {
    list-style: none;
}

.card li {
    margin-bottom: 8px;
    color: #d0d0e0;
}

.card p {
    color: #d0d0e0;
    margin-bottom: 15px;
}

button {
    background: #6c63ff;
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: background 0.2s ease;
}

button:hover {
    background: #574fd6;
}

#output {
    margin-top: 12px;
    font-weight: bold;
    color: #6cffb0;
}

footer {
    margin-top: 40px;
    color: #808090;
    font-size: 0.9rem;
}