/* Additional CSS for improved Module 1 sidebar navigation */

/* Improved sidebar section titles */
.sidebar-section h4.sidebar-section-title {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: #888;
    margin-bottom: 10px;
    padding-bottom: 5px;
    border-bottom: 1px solid #e5e5e5;
}

/* Special styling for session indicator in header */
.sidebar-section:first-of-type h4.sidebar-section-title {
    font-size: 13px;
    color: #0066cc;
    font-weight: 600;
    background-color: #f0f8ff;
    padding: 8px 12px;
    border-radius: 4px;
    border-bottom: 2px solid #0066cc;
    margin-bottom: 15px;
}

/* Better spacing for sidebar menu items */
.sidebar-menu {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar-menu li {
    list-style: none;
    margin-bottom: 4px;
    position: relative;
}

.sidebar-menu li a {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    border-radius: 6px;
    transition: all 0.2s ease;
    position: relative;
}

.sidebar-menu li a:hover {
    background-color: #f5f5f5;
}

/* Active state styling */
.sidebar-menu li.active > a.sidebar-link,
.sidebar-link.active {
    background-color: #e6f2ff;
    color: #0066cc;
    font-weight: 600;
}

/* Active indicator bar */
.sidebar-menu li.active > a.sidebar-link::before,
.sidebar-link.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background-color: #0066cc;
    border-radius: 0 2px 2px 0;
}

/* Previous session link styling */
.sidebar-link.prev-session {
    font-weight: 500;
    color: #666;
    background-color: #f8f8f8;
    border: 1px solid #ddd;
    margin-bottom: 4px;
    transition: all 0.3s ease;
}

.sidebar-link.prev-session:hover {
    background-color: #e8e8e8;
    transform: translateX(-4px);
}

/* Next session link styling */
.sidebar-link.next-session {
    font-weight: 600;
    color: #0066cc;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    margin-top: 8px;
    margin-bottom: 4px;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(102, 126, 234, 0.2);
}

.sidebar-link.next-session:hover {
    transform: translateX(4px);
    box-shadow: 0 4px 8px rgba(102, 126, 234, 0.3);
}

/* Next module link styling (less prominent) */
.sidebar-link:contains("Next Module") {
    font-weight: 500;
    color: #666;
    border: 1px solid #ddd;
}

/* Module title styling */
.sidebar-nav h3.sidebar-title {
    font-size: 16px;
    font-weight: 600;
    color: #333;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid #0066cc;
}

/* Quick Links section special styling */
.sidebar-section:last-child {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #e5e5e5;
}