/* Sidebar Menu - Updated Layout */
.case-study-sidebar {
    position: sticky;
    top: 100px; /* Adjust for header if needed */
    padding-right: 30px;
}

.case-menu-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.case-menu-list li {
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 5px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.3); /* Faint underline for inactive */
    margin-right: 40px;
}

/* Remove old pseudo-element arrow */
.case-menu-list li::before {
    display: none;
}

.case-menu-link {
    color: rgba(255, 255, 255, 0.6); /* Faded white/greenish */
    text-decoration: none;
    font-weight: bold;
    font-size: 18px; /* Bigger font as per image */
    display: block;
    line-height: 1.4;
    transition: all 0.3s ease;
    font-family: sans-serif; /* Setup clear font */
    margin-bottom: 15px;
}

.case-menu-link:hover {
    color: #fff;
    text-decoration: none;
    opacity: 1;
}

/* Active State */
.case-menu-link.active {
    color: #fff;
    text-decoration: none; /* Or just border-bottom on li? Let's check image. */
    /* Image shows text is white and clean. The LI has the border. */
    /* Wait, the active item in image ("01. Title") stands out white. */
    /* Let's make the LI border brighter for active too if needed. */
}

.case-menu-list li:has(.active) {
   border-bottom: 1px solid #fff; /* Stronger white underline for active item */
}

/* Fallback for browsers not supporting :has - use JS to add class to LI if needed, 
   but for now let's just style the link active state. */
   
.case-menu-link.active {
    color: #ffffff;
    text-shadow: 0 0 10px rgba(255,255,255,0.3);
}