/* Enhanced Course Progress Styles - 2025 */

/* Enhanced Scrolling and Slider improvements for sidebar */
#lesson-list {
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: rgba(110, 66, 229, 0.4) rgba(40, 40, 60, 0.2);
    padding-bottom: var(--spacing-lg) !important;
}

#lesson-list::-webkit-scrollbar {
    width: 8px;
}

#lesson-list::-webkit-scrollbar-track {
    background: rgba(40, 40, 60, 0.2);
    border-radius: 4px;
}

#lesson-list::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 4px;
    transition: var(--transition);
}

#lesson-list::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--accent-color));
}

.course-sidebar {
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: rgba(110, 66, 229, 0.4) rgba(40, 40, 60, 0.2);
}

.course-sidebar::-webkit-scrollbar {
    width: 8px;
}

.course-sidebar::-webkit-scrollbar-track {
    background: rgba(40, 40, 60, 0.2);
    border-radius: 4px;
}

.course-sidebar::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 4px;
    transition: var(--transition);
}

.course-sidebar::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--accent-color));
}

/* Enhanced Progress Bar Styles */
.course-progress {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border-radius: var(--border-radius-lg);
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: var(--box-shadow);
    position: relative;
    overflow: hidden;
}

.course-progress::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(110, 66, 229, 0.05), rgba(90, 242, 204, 0.05));
    z-index: 1;
}

.course-progress > * {
    position: relative;
    z-index: 2;
}

.course-progress h3 {
    margin-top: 0;
    margin-bottom: var(--spacing-md);
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    background: linear-gradient(135deg, var(--light-text), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
}

.progress-bar-container {
    width: 100%;
    height: 12px;
    background: rgba(40, 40, 60, 0.5);
    border-radius: var(--border-radius-sm);
    overflow: hidden;
    margin-bottom: var(--spacing-md);
    position: relative;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

.progress-bar-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-bar {
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-light) 50%, var(--accent-color) 100%);
    border-radius: var(--border-radius-sm);
    transition: width 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    width: 0%;
    position: relative;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(110, 66, 229, 0.3);
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    animation: progressShine 1.5s ease-in-out infinite;
}

@keyframes progressShine {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.progress-stats {
    font-size: var(--text-sm);
    color: var(--dim-text);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: var(--font-medium);
}

#completion-counter {
    font-weight: var(--font-semibold);
    color: var(--light-text);
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-size: var(--text-base);
}

/* Enhanced Completed Lesson Styles */
#lesson-list li.completed {
    position: relative;
    background: linear-gradient(135deg, rgba(74, 222, 128, 0.1), rgba(110, 66, 229, 0.1));
    border-left-color: var(--success-color) !important;
}

/* Removed checkmark indicators - using subtle styling instead */

#lesson-list li.completed .lesson-title {
    color: var(--light-text);
    font-weight: var(--font-semibold);
}

#lesson-list li.completed .lesson-number {
    background: rgba(74, 222, 128, 0.2);
    color: var(--success-color) !important;
    opacity: 1 !important;
    border: 1px solid rgba(74, 222, 128, 0.3);
}

/* Enhanced Mark as Completed Button Styles */
#mark-completed-btn,
#ema-mark-completed-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-xl);
    background: linear-gradient(135deg, rgba(110, 66, 229, 0.1), rgba(90, 242, 204, 0.1));
    color: var(--primary-color);
    border: 2px solid rgba(110, 66, 229, 0.3);
    border-radius: var(--border-radius-lg);
    font-weight: var(--font-semibold);
    font-size: var(--text-lg);
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
    min-width: 240px;
    box-shadow: 0 4px 16px rgba(110, 66, 229, 0.2);
}

#mark-completed-btn::before,
#ema-mark-completed-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s;
}

#mark-completed-btn:hover::before,
#ema-mark-completed-btn:hover::before {
    left: 100%;
}

#mark-completed-btn:hover,
#ema-mark-completed-btn:hover {
    background: linear-gradient(135deg, rgba(110, 66, 229, 0.2), rgba(90, 242, 204, 0.2));
    border-color: rgba(110, 66, 229, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(110, 66, 229, 0.3);
}

#mark-completed-btn.completed,
#ema-mark-completed-btn.completed {
    background: linear-gradient(135deg, rgba(74, 222, 128, 0.2), rgba(110, 66, 229, 0.1));
    color: var(--success-color);
    border-color: rgba(74, 222, 128, 0.5);
    cursor: default;
    transform: none !important;
}

#mark-completed-btn.completed:hover,
#ema-mark-completed-btn.completed:hover {
    transform: none !important;
    box-shadow: 0 4px 12px rgba(74, 222, 128, 0.3);
}

#mark-completed-btn svg,
#ema-mark-completed-btn svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    transition: var(--transition);
}

#mark-completed-btn:hover svg:not(.completed svg),
#ema-mark-completed-btn:hover svg:not(.completed svg) {
    transform: scale(1.1);
}

#mark-completed-btn.completed svg,
#ema-mark-completed-btn.completed svg {
    color: var(--success-color);
}

/* Tooltip Enhancement */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 125%;
    left: 50%;
    transform: translateX(-50%);
    background: var(--overlay-bg);
    color: var(--light-text);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1000;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.tooltip::before {
    content: '';
    position: absolute;
    bottom: 115%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: var(--overlay-bg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 1001;
}

.tooltip:hover::after,
.tooltip:hover::before {
    opacity: 1;
    visibility: visible;
}

/* Enhanced Responsive Styles */
@media (max-width: 768px) {
    .course-progress {
        padding: var(--spacing-md);
        margin-top: var(--spacing-lg);
    }
    
    .course-progress h3 {
        font-size: var(--text-base);
    }
    
    .progress-bar-container {
        height: 10px;
    }
    
    #mark-completed-btn,
    #ema-mark-completed-btn {
         width: 100%;
         justify-content: center;
         padding: var(--spacing-lg) var(--spacing-xl);
         font-size: var(--text-xl);
         min-width: unset;
         margin-top: var(--spacing-md);
     }
    
    #mark-completed-btn.completed,
    #ema-mark-completed-btn.completed {
        pointer-events: none;
    }
    
    .course-sidebar {
        -webkit-overflow-scrolling: touch;
    }
    
    #lesson-list {
        -webkit-overflow-scrolling: touch;
        padding-bottom: var(--spacing-xxl);
    }
    
         /* Checkmark styles removed */
    
    .tooltip::after {
        bottom: 140%;
        font-size: 10px;
        padding: 4px 8px;
    }
}