:root {
    --primary-color: #0b5ed7;
    --secondary-color: #5a6268;
    --success-color: #146c43;
    --info-color: #0aa2c0;
    --danger-color: #b02a37;
    --dark-bg: #1a1d23;
    --darker-bg: #0f1115;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.bg-gradient-primary {
    background: linear-gradient(135deg, #4158D0 0%, #C850C0 46%, #FFCC70 100%);
}

.feature-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.protocol-card {
    border-radius: 15px;
    transition: all 0.3s ease;
    background: #e8e9ea;
    height: 100%;
    border: 1px solid #dee2e6;
}

.protocol-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.hero {
    min-height: 500px;
    display: flex;
    align-items: center;
}

.nav-link.active {
    font-weight: 600;
}

.code-block {
    background: #2d2d2d;
    color: #f8f8f2;
    padding: 20px;
    border-radius: 8px;
    overflow-x: auto;
    margin: 15px 0;
}

.code-block code {
    font-family: 'Courier New', Courier, monospace;
}

.step-number {
    width: 40px;
    height: 40px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
}

.protocol-badge {
    display: inline-block;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.faq-item {
    border-left: 3px solid var(--primary-color);
    padding-left: 20px;
    margin-bottom: 20px;
}

.btn {
    border-radius: 8px;
    padding: 10px 25px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.2);
}

@media (max-width: 768px) {
    .hero {
        min-height: 400px;
    }
    
    .display-3 {
        font-size: 2.5rem;
    }
}