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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    min-height: 100vh;
    color: #e4e4e7;
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    padding: 40px 0;
}

header h1 {
    font-size: 2.5rem;
    background: linear-gradient(90deg, #00d9ff, #00ff88);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.subtitle {
    color: #a1a1aa;
    font-size: 1.1rem;
}

.card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 20px;
    backdrop-filter: blur(10px);
}

.card h2 {
    color: #00d9ff;
    margin-bottom: 16px;
    font-size: 1.3rem;
}

.info-list {
    list-style: none;
}

.info-list li {
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.info-list li:last-child {
    border-bottom: none;
}

.info-list strong {
    color: #00ff88;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    color: #a1a1aa;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.3);
    color: #fff;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #00d9ff;
}

.form-group input::placeholder {
    color: #71717a;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background: linear-gradient(90deg, #00d9ff, #00ff88);
    color: #1a1a2e;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    text-decoration: none;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 217, 255, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: #e4e4e7;
    margin-right: 10px;
    margin-bottom: 10px;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.1);
}

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
}

.alert.success {
    background: rgba(0, 255, 136, 0.2);
    border: 1px solid #00ff88;
    color: #00ff88;
}

.demo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}

.demo-item {
    background: rgba(0, 0, 0, 0.2);
    padding: 16px;
    border-radius: 8px;
}

.demo-item h3 {
    color: #00ff88;
    margin-bottom: 10px;
    font-size: 1rem;
}

.demo-item ul {
    list-style: none;
    color: #a1a1aa;
}

.demo-item p {
    color: #a1a1aa;
    margin: 4px 0;
}

.links {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

footer {
    text-align: center;
    padding: 30px 0;
    color: #71717a;
}

@media (max-width: 600px) {
    header h1 {
        font-size: 1.8rem;
    }
    
    .card {
        padding: 16px;
    }
}