/*
 * =========================================================================
 * course-detail.css - Styles for the Course Detail page
 * =========================================================================
 */

/* Page Header for Course Detail - Đầu trang chi tiết khóa học */
.page-header {
    background-size: cover;
    background-position: center;
    position: relative;
    padding: 80px 0;
    color: #fff;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1;
}

.page-header .container {
    position: relative;
    z-index: 2;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

/* Dashboard Layout & Sidebar - Layout trang và thanh bên */
.dashboard-layout {
    padding-top: 50px;
    padding-bottom: 50px;
}

.col-lg-3.d-none.d-lg-block .card {
    border-radius: 0.75rem !important;
    box-shadow: 0 5px 15px var(--current-card-shadow);
    background-color: var(--current-bg-color);
    border: 1px solid var(--current-border-color);
    transition: all 0.3s ease;
}

.col-lg-3.d-none.d-lg-block .card-header {
    background-color: var(--primary-color) !important;
    color: #fff;
    padding: 1.1rem 1.5rem !important;
    border-bottom: none;
    font-size: 1.2rem;
    font-weight: 600;
    border-top-left-radius: 0.75rem !important;
    border-top-right-radius: 0.75rem !important;
}

.col-lg-3.d-none.d-lg-block .list-group-item {
    border: none;
    padding: 1rem 1.5rem;
    font-size: 1rem;
    color: var(--current-text-color);
    background-color: var(--current-bg-color);
    transition: background-color 0.2s ease, color 0.2s ease;
    border-radius: 0.5rem;
    margin: 0.1rem 0;
}

/* Welcome Message - Lời chào */
.welcome-message {
    background-color: var(--current-bg-color);
    border: 1px solid var(--current-border-color);
    box-shadow: 0 5px 15px var(--current-card-shadow);
    font-size: 1.1rem;
    color: var(--current-text-color);
    transition: background-color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease, color 0.3s ease;
}

.welcome-message h4 {
    color: var(--primary-color) !important;
}

/* Video Player - Khung video */
.video-player-card {
    border-radius: 0.75rem !important;
    box-shadow: 0 5px 15px var(--current-card-shadow);
    background-color: var(--current-bg-color);
    border: 1px solid var(--current-border-color);
}

.video-player-card .card-body .embed-responsive {
    position: relative;
    width: 100%;
    padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
    height: 0;
    overflow: hidden;
    border-radius: 0.5rem;
}

.video-player-card .card-body .embed-responsive iframe {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: 0;
}

/* Progress Bar - Thanh tiến độ */
.progress {
    height: 8px;
    border-radius: 5px;
    background-color: var(--current-border-color);
}

.progress-bar {
    background-color: var(--primary-color) !important;
    border-radius: 5px;
}

/* Lesson Cards - Thẻ bài học */
.lessons-list .section-container .row {
    --bs-gutter-x: 1.5rem;
}

.lesson-card {
    background-color: var(--current-bg-color);
    border: 1px solid var(--current-border-color);
    border-radius: 0.5rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: all 0.2s ease-in-out;
    cursor: pointer;
    height: 100%;
}

.lesson-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.lesson-card-active {
    border-color: var(--primary-color) !important;
    box-shadow: 0 5px 15px rgba(var(--primary-color-rgb), 0.2) !important;
}

.lesson-card .card-body {
    padding: 0rem !important;
}

.lesson-card .card-title, 
.lesson-card .card-title a {
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1.6;
    color: var(--current-text-color);
    text-decoration: none;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis; 
}

.lesson-card img {
    border-radius: 0.5rem !important;
    object-fit: cover;
    width: 100%;
    height: 100%;
}

.dark-mode .lessons-list .lesson-card .card-title{color: var(--text-color-dark-mode);}
.card-title-lg {color: var(--light-color);}

/* Responsive - Điều chỉnh cho các màn hình khác nhau */
@media (max-width: 991.98px) {
    .page-header {
        padding: 50px 0;
    }
    .page-title {
        font-size: 2rem;
    }
    .dashboard-layout {
        padding-top: 30px;
        padding-bottom: 30px;
    }
}