/* Hide search form */
#rtd-search-form {
    display: none !important;
}

/* Hide + icons for collapsed items */
.wy-menu-vertical li span.toctree-expand {
    display: none !important;
}

/* Show - icon only for expanded (current) categories */
.wy-menu-vertical li.toctree-l1.current > a span.toctree-expand {
    display: inline-block !important;
}

/* Change + to - for expanded items */
.wy-menu-vertical li.toctree-l1.current > a span.toctree-expand::before {
    content: "\f068" !important;  /* Font Awesome minus icon */
}

/* ===== RESET ALL LINK STATES TO SAME COLOR ===== */
.wy-menu-vertical a,
.wy-menu-vertical a:visited,
.wy-menu-vertical a:link,
.wy-menu-vertical a:active {
    text-decoration: none !important;
}

/* ===== TOP LEVEL ITEMS (white text on dark background) ===== */
.wy-menu-vertical li.toctree-l1 > a,
.wy-menu-vertical li.toctree-l1 > a:visited,
.wy-menu-vertical li.toctree-l1 > a:link {
    color: #ffffff !important;
    background: transparent !important;
    font-weight: normal !important;
}

.wy-menu-vertical li.toctree-l1 > a:hover {
    background: rgba(255, 255, 255, 0.1) !important;
}

/* ===== EXPANDED SECTION HEADER (dark background) ===== */
.wy-menu-vertical li.toctree-l1.current > a,
.wy-menu-vertical li.toctree-l1.current > a:visited,
.wy-menu-vertical li.toctree-l1.current > a:link {
    background: #343131 !important;
    color: #ffffff !important;
    font-weight: normal !important;
}

/* ===== SUB-ITEMS (dark text on light background) ===== */
.wy-menu-vertical li.toctree-l1.current > ul {
    background: rgba(255, 255, 255, 0.1) !important;
}

/* All sub-items - same color, normal weight */
.wy-menu-vertical li.toctree-l1.current > ul li a,
.wy-menu-vertical li.toctree-l1.current > ul li a:visited,
.wy-menu-vertical li.toctree-l1.current > ul li a:link {
    color: #404040 !important;
    background: transparent !important;
    font-weight: normal !important;
}

.wy-menu-vertical li.toctree-l1.current > ul li a:hover {
    background: rgba(0, 0, 0, 0.05) !important;
}

/* ===== CURRENT PAGE ITEM ONLY - bold and darker ===== */
.wy-menu-vertical a.current,
.wy-menu-vertical li.toctree-l1.current > ul li a.current,
.wy-menu-vertical li.toctree-l2.current > ul li a.current,
.wy-menu-vertical li a.current {
    color: #333333 !important;
    font-weight: bold !important;
    background: rgba(0, 0, 0, 0.08) !important;
}

/* ===== NESTED CURRENT SECTIONS ===== */
.wy-menu-vertical li.toctree-l2.current > ul {
    background: rgba(255, 255, 255, 0.05) !important;
}

.wy-menu-vertical li.toctree-l2.current > ul li a,
.wy-menu-vertical li.toctree-l2.current > ul li a:visited,
.wy-menu-vertical li.toctree-l2.current > ul li a:link {
    color: #404040 !important;
    font-weight: normal !important;
    background: transparent !important;
}

/* Caption (CONTENTS:) styling */
.wy-menu-vertical .caption {
    color: #55a5d9 !important;
}