/* ===== Popular Courses Section Styles ===== */

/* Course Card Base */
.course-card {
    min-width: 340px;
    max-width: 340px;
    background: #FFFFFF;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid rgba(0, 0, 0, 0.06);
    position: relative;
    flex-shrink: 0;
    user-select: none;
    display: flex;
    flex-direction: column;
}

.course-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(31, 143, 255, 0.15);
    border-color: rgba(31, 143, 255, 0.3);
}

/* Enhanced Course Card */
.course-card-enhanced {
    background: #FFFFFF;
    border: 1px solid rgba(31, 143, 255, 0.1);
}

.course-card-enhanced:hover {
    background: #FFFFFF;
    border-color: rgba(31, 143, 255, 0.3);
}

/* Course Image */
.course-image {
    height: 200px;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.course-image i {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0.8);
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.9);
    opacity: 0;
    transition: all 0.4s ease;
    z-index: 2;
    text-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.course-card:hover .course-image i {
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

/* Course Image Backgrounds */
.course-image.web-dev {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.course-image.design {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.course-image.ai-ml {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.course-image.mobile-dev {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.course-image.cybersecurity {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
}

/* Category Badge */
.course-category-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 700;
    color: #1F8FFF;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    z-index: 3;
    backdrop-filter: blur(10px);
}

/* Course Content */
.course-content {
    padding: 24px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    background: #FFFFFF;
}

/* Teacher Info */
.course-teacher-info {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
}

.teacher-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid #1f8fff;
    box-shadow: 0 2px 8px rgba(31, 143, 255, 0.2);
}

.teacher-avatar-placeholder {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1f8fff, #0066cc);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
    border: 2px solid #1f8fff;
    box-shadow: 0 2px 8px rgba(31, 143, 255, 0.2);
}

.teacher-name {
    font-size: 0.85rem;
    color: #666;
    font-weight: 500;
}

.course-title {
    font-size: 1.25rem;
    font-weight: 800;
    margin-bottom: 12px;
    color: #0D0D0D;
    line-height: 1.4;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.course-description {
    font-size: 0.95rem;
    color: #666;
    margin-bottom: 20px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex-grow: 1;
}

/* Course Rating */
.course-rating {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
}

.course-rating-stars {
    display: flex;
    align-items: center;
    gap: 6px;
}

.course-rating-stars i {
    color: #FFC107;
    font-size: 1rem;
}

.course-rating-score {
    font-weight: 800;
    color: #0D0D0D;
    font-size: 0.95rem;
}

.course-rating-count {
    color: #999;
    font-size: 0.9rem;
}

/* Course Meta */
.course-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid #f0f0f0;
}

.course-meta > div {
    display: flex;
    align-items: center;
    gap: 6px;
    color: #666;
    font-size: 0.85rem;
}

.course-meta i {
    color: #1F8FFF;
    font-size: 0.9rem;
}

/* Enroll Button */
.course-enroll-btn {
    width: 100%;
    padding: 12px 20px;
    border-radius: 12px;
    background: linear-gradient(135deg, #1f8fff, #0066cc);
    color: white;
    border: none;
    font-size: 0.95rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    margin-top: 16px;
    box-shadow: 0 4px 15px rgba(31, 143, 255, 0.2);
}

.course-enroll-btn:hover {
    background: linear-gradient(135deg, #0066cc, #004999);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(31, 143, 255, 0.4);
    color: white;
}

.course-enroll-btn::after {
    content: '→';
    font-weight: bold;
    transition: transform 0.3s ease;
}

.course-enroll-btn:hover::after {
    transform: translateX(4px);
}

/* Slider Container */
.courses-slider-container {
    position: relative;
    max-width: 1084px;
    margin: 0 auto;
}

.courses-slider-wrapper {
    overflow: hidden;
    position: relative;
    padding: 20px 0;
    cursor: grab;
}

.courses-slider-wrapper:active {
    cursor: grabbing;
}

.courses-slider-track {
    display: flex;
    gap: 32px;
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: transform;
    padding: 10px 5px;
}

/* Navigation Buttons */
.slider-nav-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: #FFFFFF;
    border: 2px solid #1F8FFF;
    color: #1F8FFF;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.slider-nav-btn:hover {
    background: #1F8FFF;
    color: #FFFFFF;
    transform: translateY(-50%) scale(1.1);
    box-shadow: 0 6px 20px rgba(31, 143, 255, 0.3);
}

.slider-prev {
    left: 10px;
}

.slider-next {
    right: 10px;
}

/* Slider Indicators */
.slider-indicators {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 30px;
}

.indicator {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #D1D5DB;
    cursor: pointer;
    transition: all 0.3s ease;
}

.indicator.active {
    background: #1F8FFF;
    width: 32px;
    border-radius: 6px;
}

.indicator:hover {
    background: #1F8FFF;
}

/* Responsive Design */
@media (max-width: 768px) {
    .courses-slider-track {
        gap: 20px !important;
    }

    .course-card,
    .course-card-enhanced {
        min-width: 280px !important;
        max-width: 280px !important;
    }

    .course-content {
        padding: 18px !important;
    }

    .course-image {
        height: 160px !important;
    }

    .slider-nav-btn {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }

    .slider-prev {
        left: 10px;
    }

    .slider-next {
        right: 10px;
    }
}

@media (max-width: 480px) {
    .course-card,
    .course-card-enhanced {
        min-width: 260px !important;
        max-width: 260px !important;
    }

    .course-title {
        font-size: 1.1rem;
    }

    .course-description {
        font-size: 0.9rem;
    }

    .slider-nav-btn {
        display: none;
    }
}