/* Course System Styles */
.featured-courses {
    padding: 5rem 0;
    background: #f8f9fa;
}

/* Course System Title */
.course-system-title {
    text-align: center;
    margin-bottom: 3rem;
}

.course-system-title .title-line-1 {
    color: var(--red);
    font-size: 2.5rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.course-system-title .title-line-2 {
    color: var(--text-color);
    font-size: 2rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0;
    line-height: 1.2;
}

/* Course Navigation Tabs */
.course-tabs {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 3rem;
}

.course-tab {
    background: #e9ecef;
    border: none;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-color);
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
    min-width: 200px;
}

.course-tab:hover {
    background: #dee2e6;
    transform: translateY(-2px);
}

.course-tab.active {
    background: var(--red);
    color: white;
    position: relative;
}

.course-tab.active::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 10px solid transparent;
    border-right: 10px solid transparent;
    border-top: 10px solid var(--red);
}

/* Course Content Wrapper */
.course-content-wrapper {
    position: relative;
}

.course-content-panel {
    display: none;
}

.course-content-panel.active {
    display: block;
}

/* Course Split Layout */
.course-split-layout {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 3rem;
    align-items: start;
    background: white;
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

/* Left Side - Image & CTA */
.course-image-section {
    text-align: center;
}

.course-featured-image {
    margin-bottom: 2rem;
}

.course-featured-image img {
    width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.course-placeholder {
    background: linear-gradient(135deg, var(--red) 0%, #ff6b35 100%);
    color: white;
    padding: 3rem 2rem;
    border-radius: 10px;
    text-align: center;
    min-height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.course-placeholder h4 {
    font-size: 1.5rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    line-height: 1.4;
    margin: 0;
}

.course-cta-section {
    margin-top: 1rem;
}

.btn-register {
    background: var(--red);
    color: white;
    padding: 1rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s;
    display: inline-block;
    box-shadow: 0 4px 15px rgba(211, 47, 47, 0.3);
}

.btn-register:hover {
    background: var(--dark-red);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(211, 47, 47, 0.4);
    color: white;
    text-decoration: none;
}

/* Right Side - Content */
.course-details-section {
    padding-left: 1rem;
}

.course-features-list {
    list-style: none;
    padding: 0;
    margin: 0 0 2rem 0;
}

.course-features-list li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    line-height: 1.6;
    font-size: 1.1rem;
    border-bottom: 1px solid #f0f0f0;
}

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

.course-features-list li::before {
    content: '●';
    position: absolute;
    left: 0;
    color: var(--red);
    font-size: 1.2rem;
    font-weight: bold;
}

.course-description {
    font-size: 1.1rem;
    line-height: 1.8;
    margin-bottom: 2rem;
    color: #555;
}

/* Course Meta Info */
.course-meta-info {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.course-duration,
.course-price {
    background: var(--light-bg);
    padding: 0.75rem 1.5rem;
    border-radius: 25px;
    font-weight: 600;
    color: var(--text-color);
    border: 2px solid #e9ecef;
}

.course-price {
    color: var(--red);
    border-color: var(--red);
    background: rgba(211, 47, 47, 0.1);
}

/* Course Action Buttons */
.course-action-buttons {
    margin-top: 1rem;
}

.btn-detail {
    background: #ffc107;
    color: #000;
    padding: 0.75rem 2rem;
    border-radius: 25px;
    text-decoration: none;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: all 0.3s;
    display: inline-block;
}

.btn-detail:hover {
    background: #ffb300;
    transform: translateY(-2px);
    color: #000;
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(255, 193, 7, 0.4);
}

/* Responsive Design */
@media (max-width: 992px) {
    .course-split-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .course-details-section {
        padding-left: 0;
    }
    
    .course-system-title .title-line-1 {
        font-size: 2rem;
    }
    
    .course-system-title .title-line-2 {
        font-size: 1.5rem;
    }
}

@media (max-width: 768px) {
    .course-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .course-tab {
        width: 100%;
        max-width: 300px;
    }
    
    .course-split-layout {
        padding: 1.5rem;
    }
    
    .course-meta-info {
        flex-direction: column;
        gap: 1rem;
    }
    
    .course-system-title .title-line-1 {
        font-size: 1.75rem;
    }
    
    .course-system-title .title-line-2 {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .featured-courses {
        padding: 3rem 0;
    }
    
    .course-split-layout {
        padding: 1rem;
    }
    
    .btn-register,
    .btn-detail {
        padding: 0.75rem 1.5rem;
        font-size: 1rem;
    }
    
    .course-features-list li {
        font-size: 1rem;
    }
}