.lesson-plan-generator {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    min-height: 100vh;
}

.hero-section {
    background: linear-gradient(135deg, #4a6fa5 0%, #6b8cbc 100%);
    color: white;
    padding: 3rem 0;
    margin-bottom: 2rem;
}

.gradient-card {
    background: linear-gradient(145deg, #ffffff, #f8f9fa);
    border: none;
    border-radius: 20px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.gradient-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #4a6fa5, #6b8cbc);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    color: white;
    font-size: 2rem;
}

.nav-pills .nav-link {
    border-radius: 50px;
    padding: 12px 30px;
    margin: 0 10px;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.nav-pills .nav-link.active {
    background: linear-gradient(135deg, #4a6fa5, #6b8cbc);
    border-color: #4a6fa5;
    transform: scale(1.05);
}

.nav-pills .nav-link:not(.active) {
    background: white;
    color: #6c757d;
    border: 2px solid #e9ecef;
}

.nav-pills .nav-link:not(.active):hover {
    border-color: #4a6fa5;
    color: #4a6fa5;
}

.form-control, .form-select {
    border-radius: 12px;
    border: 2px solid #e9ecef;
    padding: 12px 16px;
    transition: all 0.3s ease;
}

.form-control:focus, .form-select:focus {
    border-color: #4a6fa5;
    box-shadow: 0 0 0 0.2rem rgba(74, 111, 165, 0.25);
}

.btn-generate {
    background: linear-gradient(135deg, #28a745, #20c997);
    border: none;
    border-radius: 50px;
    padding: 15px 40px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-generate:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(40, 167, 69, 0.3);
}

.btn-generate::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.5s;
}

.btn-generate:hover::before {
    left: 100%;
}

.guide-section {
    background: linear-gradient(135deg, #fff3cd, #ffeaa7);
    border-radius: 15px;
    padding: 2rem;
    margin: 2rem 0;
    border-left: 5px solid #ffc107;
}

.benefit-card {
    text-align: center;
    padding: 2rem 1rem;
    transition: all 0.3s ease;
}

.benefit-card:hover {
    transform: translateY(-5px);
}

.benefit-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #4a6fa5, #6b8cbc);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: white;
    font-size: 1.5rem;
}

.radio-group {
    background: #f8f9fa;
    border-radius: 12px;
    padding: 1.5rem;
    border: 2px solid #e9ecef;
}

.free-badge {
    background: linear-gradient(135deg, #28a745, #20c997);
    color: white;
    padding: 8px 20px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-block;
    margin-bottom: 1rem;
}

@media (max-width: 768px) {
    .hero-section {
        padding: 2rem 0;
    }
    
    .nav-pills .nav-link {
        margin: 5px;
        padding: 10px 20px;
    }
    
    .gradient-card {
        margin: 0 10px;
    }
}