/* --- Sidebar --- */
.sidebar {
    width: 240px;
    background-color: #203d50;
    color: white;
    display: flex;
    flex-direction: column;
    padding-top: 0rem;
    height: 100vh;
    position: fixed;
    top: 0;
    left: 0;
    transition: transform 0.3s ease;
    z-index: 999;

    border-right: 0px solid #006875;
    /* NEW: allow scrolling when dropdown content exceeds view height */
    overflow-y: auto;
    scrollbar-width: 1 px; /* for Firefox */
    scrollbar-color: #797979 #203d50; /* accent + track color */
}

.sidebar h2 {
    text-align: center;
    font-size: 1.2rem;
    margin-bottom: 1rem;
    letter-spacing: 1px;
}

.sidebar a {
    color: white;
    text-decoration: none;
    padding: 12px 20px;
    display: block;
    border-left: 4px solid transparent;
    transition: border 0.2s;
}

.sidebar a.active {
    background-color: #0f3044;         /* same as hover color */
    border-left: 0px solid #00bcd4;    /* same as hover accent */
    color: #ffffff;                    /* ensure text stays readable */
}

.sidebar > a:hover {
    background-color: #0f3044;
    border-left: 4px solid #00bcd4;
}

.sidebar > a.active {
    background-color: #0f3044;
    border-left: 4px solid #00bcd4;
    font-weight: bold;
}



/* --- Toggle button (visible only on mobile) --- */
.toggle-btn {
    position: fixed;
    top: 15px;
    left: 15px;
    font-size: 1.5rem;
    background: #203d50;
    color: white;
    border: none;
    border-radius: 4px;
    padding: 6px 10px;
    cursor: pointer;
    display: none;
    z-index: 1000;
}

/* --- Responsive behaviour --- */
@media (max-width: 1300px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.active {
        transform: translateX(0);
    }
    .toggle-btn {
        display: block;
    }
    main {
        margin-left: 0;
        padding-top: 3.5rem; /* prevent overlap with toggle button */
    }
}



/* --- Collapsible Dropdowns --- */


.dropdown-btn, .sub-dropdown-btn {
  background: none;
  color: white;
  border: none;
  text-align: left;
  width: 100%;
  padding: 12px 20px;
  cursor: pointer;
  font-size: 1rem;
  font-family: inherit;
  display: block;
  border-right: 0px solid #00bcd4;
  border-top: 0px solid #00bcd4;
  transition: all 0.2s;
  position: relative;
  padding-right: 36px; /* make space for the arrow */
  margin-top: 10px;
}


.dropdown-btn:hover, .sub-dropdown-btn:hover {
  background-color: #0f3044;
  border-left: 4px solid #00bcd4;
}

.dropdown-content, .sub-dropdown-content {
  display: none;
  flex-direction: column;
  padding-left: 5px;
  background-color: #162a38;
}

.dropdown-content a, .sub-dropdown-content a {
  font-size: 0.9rem;
  padding: 8px 24px;
  color: #ddd;
}

.dropdown-content a:hover, .sub-dropdown-content a:hover {
  background-color: #0f3044;
}


/* Default (closed) state — show right arrow ▸ */

.dropdown-btn::after,
.sub-dropdown-btn::after {
  content: "▸";
  position: absolute;
  right: 8px;  /* distance from right edge */
  top: 50%;    /* vertical center */
  transform: translateY(-50%) rotate(0deg);
  transition: transform 0.2s ease;
}
/* Active dropdown (opened) */
.dropdown.open > .dropdown-content,
.sub-dropdown.open > .sub-dropdown-content {
  display: flex;
}

.dropdown.open > .dropdown-btn::after,
.sub-dropdown.open > .sub-dropdown-btn::after {
  transform: translateY(-50%) rotate(90deg);
}