#case-study-arrow {
    display: inline-block;
    transition: transform 0.2s ease;
}

#case-study-arrow.open {
    transform: rotate(180deg);
}

/* Main button styling */
.case-study-button {
    background: transparent;
    border: none;
    padding: 0;
    margin-top: 40px;
    font-size: 22px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Hover underline effect */
.case-study-label {
    border-bottom: 2px solid transparent;
    transition: border-color 0.2s ease;
}

.case-study-button:hover .case-study-label {
    border-color: #888; /* subtle underline */
}

/* Arrow rotation */
.case-study-arrow {
    display: inline-block;
    transition: transform 0.25s ease;
}

.case-study-arrow.open {
    transform: rotate(180deg);
}


.case-study-subtitle-small {
    font-size: 12px;          /* small text */
    color: #6c757d;           /* muted grey */
    margin-top: 4px;          /* slight spacing below button */
    padding-left: 2px;        /* align gently with the title */
}