:root {
  --sidebar-width: 100px;
  --sidebar-width-collapsed: 50px;
  --sidebar-height: 500px;
  --transition-speed: 0.3s;
  --primary-color: #2c3e5022;
  --sidebar-color: rgba(255, 255, 255, 1);
  --secondary-color: #3498db;
  --text-color: #999;
  --sans-serif: "Nunito Sans", -apple-system, BlinkMacSystemFont, "avenir next",
    avenir, helvetica, "helvetica neue", ubuntu, roboto, noto, "segoe ui", arial,
    sans-serif;
  --hover-color: #000;
}

.sidebar {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  left: 0;
  width: var(--sidebar-width);
  height: min(var(--sidebar-height), 80vh, 700px);
  background-color: var(--sidebar-color);
  transition: width var(--transition-speed), opacity var(--transition-speed);
  overflow: hidden;
  z-index: 1000;
  border-radius: 0 10px 10px 0;
  box-shadow: 2px 0 10px rgba(0, 0, 0, 0.2);
  opacity: 1;
}

/* Collapsed state with reduced opacity */
.sidebar.collapsed {
  width: var(--sidebar-width-collapsed);
  opacity: 0.5;
}

/* Override opacity when hovering */
.sidebar:hover {
  opacity: 1;
}

.sidebar-content {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 0px 0;
  width: 100%;
}

.sidebar-menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-evenly;
  list-style-type: none;
  padding: 0;
  margin: 20px 0 0 0;
  width: 100%;
  height: calc(100% - 20px);
  overflow: hidden;
}

.sidebar-menu li {
  width: 100%;
  text-align: center;
  flex-shrink: 0;
}

.sidebar-menu a {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  color: var(--text-color);
  padding: 10px;
  transition: color var(--transition-speed);
  width: 100%;
  box-sizing: border-box;
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
  color: var(--hover-color);
  font-weight: 700;
}

.sidebar-menu a:hover {
  color: var(--hover-color);
}

.sidebar-menu i {
  font-size: 1.8rem;
  margin-bottom: 5px;
}

.collapsed .sidebar-menu i {
  padding: 0;
  margin: 0 auto;
}

.sidebar-menu span {
  font-size: 0.8rem;
  opacity: 1;
  transition: opacity var(--transition-speed);
  max-width: 100%;
}

.collapsed .sidebar-menu span {
  visibility: hidden;
}

/* Responsive adjustments */
@media (max-width: 768px) {
  :root {
    --sidebar-width: 120px;
    --sidebar-width-collapsed: 60px;
  }

  .sidebar-menu i {
    font-size: 1.5rem;
  }

  .sidebar-menu span {
    font-size: 0.7rem;
  }
}

/* Adjust to screen size */
@media (min-height: 1200px) {
  .sidebar {
    height: 66.67vh;
  }
}

@media (max-width: 1200px) {
  .sidebar {
    width: calc(100vw / 12);
  }

  .sidebar.collapsed {
    width: var(--sidebar-width-collapsed);
  }
}

@media (max-height: 600px) {
  .sidebar-menu span {
    opacity: 0;
    width: 0;
    height: 0;
    overflow: hidden;
  }
}


/* For touch devices, ensure the sidebar is visible when touched */
/* @media (hover: none) {
  .sidebar.collapsed:active {
    width: var(--sidebar-width);
    opacity: 1;
  }

  .sidebar.collapsed:active .sidebar-menu span {
    opacity: 1;
    width: auto;
    height: auto;
    overflow: visible;
  }
} */

/* ─── BACKDROP (shared, hidden by default) ─────────────────────── */
.sidebar-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  z-index: 999;
}
.sidebar-backdrop.visible {
  display: block;
}

/* ─── MOBILE TOP BAR + HAMBURGER ───────────────────────────────── */
.mobile-top-bar {
  display: none; /* shown only on mobile via media query */
}

.mobile-hamburger {
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px 12px;
  color: var(--text-color);
  font-size: 1.4rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ─── MOBILE OVERRIDES (≤768px) ────────────────────────────────── */
@media (max-width: 768px) {
  /* Top bar */
  .mobile-top-bar {
    display: flex;
    position: fixed !important;
    top: 0;
    left: 0;
    right: 0;
    height: 48px;
    background: var(--sidebar-color);
    z-index: 1001;
    align-items: center;
    padding: 0 0.5rem;
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.12);
  }

  /* Sidebar: full-height overlay, slides in from left */
  .sidebar,
  .sidebar.mobile-hidden {
    top: 0;
    left: -220px;
    width: 200px;
    height: 100vh;
    border-radius: 0 10px 10px 0;
    transform: none;
    opacity: 1;
    transition: left 0.25s ease;
    z-index: 1002;
  }

  .sidebar.mobile-open {
    left: 0;
  }

  /* Nav list: vertical, left-aligned, below top bar */
  .sidebar-menu {
    align-items: flex-start;
    margin-top: 56px;
    overflow-y: auto;
  }

  .sidebar-menu li {
    width: 100%;
    text-align: left;
  }

  .sidebar-menu a {
    flex-direction: row;
    gap: 14px;
    padding: 14px 20px;
    justify-content: flex-start;
    min-height: 48px;
  }

  .sidebar-menu i {
    font-size: 1.3rem;
    margin-bottom: 0;
    width: 22px;
    flex-shrink: 0;
  }

  .sidebar-menu span {
    font-size: 1rem;
    visibility: visible;
    opacity: 1;
  }

  /* Suppress desktop collapsed-state overrides on mobile */
  .sidebar.collapsed,
  .collapsed .sidebar-menu span,
  .collapsed .sidebar-menu i {
    all: unset;
  }
}