/* ==========================================
   Styles for course-video.html
   ========================================== */
body.page-course-video {
   --primary-color: #b00020;
   --primary-container: #de022c;
   --on-primary-container: #ffffff;
   --background: #f9f9f9;
   --on-background: #1a1c1c;
   --surface-variant: #e2e2e2;
   --inverse-surface: #2f3131;
   --on-surface-variant: #5d3f3d;
}

body.page-course-video {
   font-family: 'Inter', sans-serif;
   background-color: var(--background);
   color: var(--on-background);
}

.page-course-video .material-symbols-outlined {
   font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
   vertical-align: middle;
}

.page-course-video .navbar {
   border-bottom: 2px solid var(--on-background);
   background-color: var(--background) !important;
   padding: 1rem 1.25rem;
}

.page-course-video .navbar-brand {
   font-weight: 900;
   letter-spacing: -1px;
   font-size: 1.5rem;
}

.page-course-video .text-primary-custom {
   color: var(--primary-color);
}

.page-course-video .btn-primary-custom {
   background-color: var(--primary-container);
   color: white;
   border-radius: 0;
   font-weight: 600;
   padding: 0.5rem 1.5rem;
   border: none;
}

.play-button {
   font-size: 5rem !important;
   color: #de022c !important;
}

.page-course-video .nav-pills .nav-link {
   color: rgba(255, 255, 255, 0.8);
   border-radius: 0;
   padding: 0.75rem 1.25rem;
   display: flex;
   align-items: center;
   white-space: normal;
   word-break: break-word;
}

.page-course-video .nav-pills .nav-link:hover {
   background-color: rgba(255, 255, 255, 0.1);
   color: white;
}

.page-course-video .nav-pills .nav-link.active {
   background-color: var(--primary-container);
   color: white;
   box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

.page-course-video .sidebar h2,
.page-course-video .sidebar h3 {
   margin: 0;
   font-size: inherit;
   font-weight: inherit;
   line-height: inherit;
   color: inherit;
   display: inline;
}

.page-course-video .sidebar-promo h4 {
   font-size: 1.1rem;
   font-weight: 700;
   margin-bottom: 0.25rem;
}

.page-course-video .sidebar-promo p {
   font-size: 0.75rem;
   margin-bottom: 1rem;
}

.page-course-video .btn-download {
   background: var(--on-background);
   color: white;
   width: 100%;
   border: none;
   font-size: 0.7rem;
   letter-spacing: 2px;
   padding: 0.5rem;
   font-weight: 700;
}

.page-course-video .badge-active {
   background-color: var(--primary-container);
   color: white;
   padding: 0.25rem 0.75rem;
   font-size: 0.75rem;
   font-weight: 600;
   border-radius: 0;
   display: inline-block;
   margin-bottom: 0.5rem;
}

.page-course-video .video-container {
   position: relative;
   aspect-ratio: 16 / 9;
   background: black;
   border: 1px solid var(--on-background);
   overflow: hidden;
}

.page-course-video .video-container img {
   width: 100%;
   height: 100%;
   object-fit: cover;
   opacity: 0.8;
}

.page-course-video .play-btn {
   position: absolute;
   top: 50%;
   left: 50%;
   transform: translate(-50%, -50%);
   width: 80px;
   height: 80px;
   background: var(--primary-container);
   color: white;
   border: none;
   display: flex;
   align-items: center;
   justify-content: center;
   transition: transform 0.2s;
}

.page-course-video .play-btn:hover {
   transform: translate(-50%, -50%) scale(1.1);
}

.page-course-video .video-label {
   position: absolute;
   bottom: 0;
   left: 0;
   background: var(--on-background);
   color: white;
   padding: 0.5rem 1.5rem;
   font-size: 0.85rem;
   font-weight: 600;
}

.page-course-video .nav-underline-custom {
   border-bottom: 1px solid var(--surface-variant);
}

.page-course-video .nav-underline-custom .nav-link.active {
   color: var(--primary-container);
   border-bottom-color: var(--primary-container);
}

.page-course-video .list-group-item {
   border-radius: 0 !important;
   border-left: none;
   border-right: none;
   padding: 1rem;
   transition: background 0.2s;
}

.page-course-video .list-group-item.active-lecture {
   background-color: white;
   border-left: 4px solid var(--primary-container);
}

.page-course-video .list-group-item .lecture-num {
   font-weight: 700;
   color: #666;
   width: 30px;
}

.page-course-video .list-group-item.active-lecture .lecture-num {
   color: var(--primary-container);
}

.page-course-video .btn-status {
   font-size: 0.65rem;
   font-weight: 800;
   padding: 0.25rem 0.75rem;
   border-radius: 0;
}

.page-course-video .bento-card {
   background-color: var(--inverse-surface);
   color: white;
   padding: 2rem;
   position: relative;
   overflow: hidden;
}

.page-course-video .bento-card .btn-outline {
   border: 2px solid var(--primary-container);
   color: var(--primary-container);
   background: transparent;
   width: 100%;
   padding: 0.75rem;
   font-weight: 700;
   transition: 0.3s;
}

.page-course-video .bento-card .btn-outline:hover {
   background: var(--primary-container);
   color: white;
}

.page-course-video footer {
   background: var(--on-background);
   color: white;
   padding: 4rem 1.25rem;
}

@media (max-width: 768px) {
   .page-course-video .sidebar {
      display: none;
   }

   .page-course-video .mobile-nav {
      position: fixed;
      bottom: 0;
      width: 100%;
      background: white;
      border-top: 1px solid var(--surface-variant);
      display: flex;
      justify-content: space-around;
      padding: 0.75rem;
      z-index: 1000;
   }
}