.back-link {
    display: inline-block;
    color: #00B4D8;
    text-decoration: none;
    margin-bottom: 20px;
    font-weight: 500;
    transition: opacity 0.3s;
}

.back-link:hover {
    opacity: 0.7;
}

.bot-header {
    margin-top: 20px;
}

.bot-icon-large {
    font-size: 5rem;
    display: block;
    margin-bottom: 20px;
}

.tagline {
    font-size: 1.3rem;
    color: #0077B6;
    font-weight: 500;
}

.features {
    background: white;
    border-radius: 15px;
    padding: 50px 30px;
    margin: 40px 0;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.features h2 {
    text-align: center;
    color: #0077B6;
    font-size: 2rem;
    margin-bottom: 40px;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-item {
    text-align: center;
    padding: 20px;
}

.feature-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 15px;
}

.feature-item h3 {
    color: #333;
    margin-bottom: 10px;
    font-size: 1.3rem;
}

.feature-item p {
    color: #666;
    line-height: 1.5;
}

.how-to-use {
    background: white;
    border-radius: 15px;
    padding: 50px 30px;
    margin: 40px 0;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
}

.how-to-use h2 {
    text-align: center;
    color: #0077B6;
    font-size: 2rem;
    margin-bottom: 40px;
}

.steps {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 30px;
}

.step {
    flex: 1;
    min-width: 200px;
    text-align: center;
    padding: 20px;
}

.step-number {
    display: inline-block;
    width: 50px;
    height: 50px;
    line-height: 50px;
    background: linear-gradient(135deg, #00B4D8 0%, #0077B6 100%);
    color: white;
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 15px;
}

.step h3 {
    color: #333;
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.step p {
    color: #666;
    line-height: 1.5;
}

.cta-section {
    background: linear-gradient(135deg, #00B4D8 0%, #0077B6 100%);
    border-radius: 15px;
    padding: 60px 30px;
    margin: 40px 0;
    text-align: center;
    color: white;
}

.cta-section h2 {
    font-size: 2.2rem;
    margin-bottom: 15px;
}

.cta-section p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.95;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
}

.btn-line {
    display: inline-block;
    background: #06C755;
    color: white;
    padding: 15px 40px;
    border-radius: 30px;
    text-decoration: none;
    font-size: 1.2rem;
    font-weight: bold;
    transition: transform 0.3s;
}

.btn-line:hover {
    transform: scale(1.05);
}

.qr-code {
    width: 150px;
    height: 150px;
    background: white;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
}

@media (max-width: 768px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    .steps {
        flex-direction: column;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
}