:root {
  --sidebar-bg: rgba(15, 25, 80, 0.95);
  --accent: linear-gradient(135deg, #00c6ff, #0072ff);
  --text: #fff;
}
body.dark {
  --sidebar-bg: rgba(20,20,30,0.95);
  --accent: linear-gradient(135deg, #ff9a9e, #fad0c4);
  --text: #eee;
}
body {
  margin: 0;
  font-family: "Segoe UI", sans-serif;
  background: #f4f7fa;
  transition: background 0.3s;
}

/* Sidebar */
.sidebar {
  width: 260px;   /* always full width */
  height: 100vh;
  background: #010867;
  color: var(--text);
  position: fixed;
  top: 0; left: 0;
  overflow-y: auto;
  box-shadow: 2px 0 12px rgba(0,0,0,0.3);
  display: flex;
  flex-direction: column;
}

/* Header */
.sidebar-header {
  display: flex;
  align-items: center;
  padding: 15px;
  margin-top: 75px;
}
.sidebar-header img {
  width: 45px; height: 45px;
  border-radius: 50%;
}



            .sidebar::-webkit-scrollbar {
    height: 6px;
}

.sidebar::-webkit-scrollbar-thumb {
    background-color: #ccc;
    border-radius: 10px;
}
 .sidebar::-webkit-scrollbar-track {
    background-color: #f9f9f9;
}




.sidebar-header .brand {
  margin-left: 12px;
  font-size: 18px;
  font-weight: 600;
  white-space: nowrap;
}

/* Nav */
.sidebar-nav ul {list-style: none; margin: 0; padding: 0;}
.sidebar-nav li {position: relative;}
.sidebar-nav a {
  display: flex;
  align-items: center;
  padding: 14px 20px;
  color: white;
  text-decoration: none;
  border-left: 4px solid transparent;
  transition: all 0.3s;
}
.sidebar-nav a i {margin-right: 12px; min-width: 20px;}
.sidebar-nav a span {opacity: 1;} /* always visible */
.sidebar-nav a:hover {
  background: rgba(255,255,255,0.1);
}
.sidebar-nav a.active {
  background: rgba(255,255,255,0.15);
  border-left: 4px solid transparent;
  border-image: var(--accent) 1;
  border-image-slice: 1;
}

/* Submenu */
.submenu {
  display: none;
  background: rgba(255,255,255,0.05);
}
.submenu a {padding-left: 34px; font-size: 14px; color: #ddd;}
.submenu a:hover {background: rgba(255,255,255,0.15);}
.has-sub.active .submenu {display: block;}
.arrow {margin-left: auto; transition: transform 0.3s;}
.has-sub.active .arrow {transform: rotate(90deg);}

/* Footer */
.sidebar-footer {
  margin-top: auto;
  padding: 10px;
  border-top: 1px solid rgba(255,255,255,0.1);
}
.sidebar-footer .user {
  display: flex;
  align-items: center;
  padding: 10px;
}
.sidebar-footer .user img {
  width: 35px; height: 35px;
  border-radius: 50%;
}
.sidebar-footer .username {
  margin-left: 10px;
  font-size: 14px;
}
.footer-actions {
  display: flex;
  justify-content: space-between;
  padding: 10px;
}
.footer-actions button, .footer-actions a {
  background: none; border: none; color: white;
  cursor: pointer; font-size: 18px;
}
.submenu {
    display: none;
    margin-left: 15px;
}

.has-sub.open > .submenu {
    display: block;
}


/* Hamburger styles */
.hamburger {
  position: fixed;
  top: 15px;
  left: 15px;
  z-index: 1100;
  background: none;
  border: none;
  color: white;
  font-size: 24px;
  cursor: pointer;
  display: none ; /* hidden on desktop */
}

/* Mobile styles */
@media (max-width: 768px) {
  .hamburger {
    display: block; /* show hamburger on mobile */
  }

  .sidebar {
    transform: translateX(-100%); /* hide sidebar */
    transition: transform 0.3s ease-in-out;
    width: 240px;
    z-index: 1000;
  }

  .sidebar.active {
    transform: translateX(0); /* slide in sidebar */
  }
}