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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background 0.5s ease;
}

.container {
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 2.5rem;
    border-radius: 20px;
    box-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    border: 1px solid rgba(255, 255, 255, 0.18);
    max-width: 450px;
    width: 100%;
}

h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

p {
    font-size: 1rem;
    margin-bottom: 2rem;
    color: #e2e8f0;
}

.card {
    background: rgba(255, 255, 255, 0.05);
    padding: 1.25rem;
    border-radius: 12px;
    margin-bottom: 1rem;
}

.card h2 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.btn {
    background: #ffffff;
    color: #4a5568;
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    transform: translateY(-2px);
    background: #edf2f7;
}

.btn:active {
    transform: translateY(0);
}

.btn.secondary {
    background: #48bb78;
    color: #fff;
}

.btn.secondary:hover {
    background: #38a169;
}