/* ════════════════════════════════════════════════
   MOBILE HAMBURGER BUTTON  — add inside .icon-group
════════════════════════════════════════════════ */
.hamburger-btn {
  display: none; /* shown only on mobile via media query */
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #1a1a6e, #2e2ea8);
  border: none;
  border-radius: 10px;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(26,26,110,0.35), inset 0 1px 0 rgba(255,255,255,0.15);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.hamburger-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.1), transparent);
  border-radius: 10px;
}
.hamburger-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 20px rgba(26,26,110,0.5);
}
.hamburger-btn.open .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger-btn.open .bar:nth-child(2) { opacity: 0; transform: scaleX(0); }
.hamburger-btn.open .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.bar {
  width: 20px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: all 0.35s cubic-bezier(0.68, -0.6, 0.32, 1.6);
  transform-origin: center;
}
 
/* ════════════════════════════════════════════════
   MOBILE SIDEBAR OVERLAY
════════════════════════════════════════════════ */
.mob-overlay {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 40, 0.6);
  backdrop-filter: blur(4px);
  z-index: 99998;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}
.mob-overlay.active {
  opacity: 1;
  pointer-events: all;
}
 
/* ════════════════════════════════════════════════
   SIDEBAR PANEL
════════════════════════════════════════════════ */
.mob-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 320px;
  max-width: 85vw;
  height: 100dvh;
  background: #0d0d3a;
  z-index: 99999;
  display: flex;
  flex-direction: column;
  transform: translateX(-110%);
  transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  overflow: hidden;
  box-shadow: 8px 0 40px rgba(0,0,0,0.5);
}
.mob-sidebar.open {
  transform: translateX(0);
}
 
/* ── 3D Shimmer background effect ── */
.mob-sidebar::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(ellipse at 60% 20%, rgba(255,102,0,0.08) 0%, transparent 50%),
              radial-gradient(ellipse at 20% 80%, rgba(26,26,110,0.5) 0%, transparent 50%);
  pointer-events: none;
  animation: shimmerBg 8s ease-in-out infinite alternate;
}
@keyframes shimmerBg {
  0% { transform: translate(0,0); }
  100% { transform: translate(20px, 20px); }
}
 
/* ── Sidebar Header ── */
.mob-sidebar-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px 14px;
  background: white;
  border-bottom: 1px solid rgba(255,102,0,0.3);
  flex-shrink: 0;
  position: relative;
}
.mob-sidebar-head::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, #ff6600, transparent);
}
.mob-logo-wrap img {
  height: 40px;
  object-fit: contain;
  filter: brightness(1.1);
}
.mob-close-btn {
  width: 34px;
  height: 34px;
  border: 1.5px solid #0d0d3a;
  border-radius: 8px;
  background: rgba(255,255,255,0.07);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #0d0d3a;
  font-size: 16px;
  transition: all 0.2s;
  backdrop-filter: blur(8px);
}
.mob-close-btn:hover {
  background: rgba(255,102,0,0.3);
  border-color: #ff6600;
  transform: rotate(90deg);
}
 
/* ── Sidebar Search ── */
.mob-search-wrap {
  padding: 14px 16px;
  flex-shrink: 0;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.mob-search {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 10px;
  overflow: hidden;
  transition: border-color 0.2s;
}
.mob-search:focus-within {
  border-color: rgba(255,102,0,0.5);
  background: rgba(255,255,255,0.1);
}
.mob-search input {
  flex: 1;
  background: transparent;
  border: none;
  padding: 10px 14px;
  color: #fff;
  font-size: 12px;
  outline: none;
  font-family: 'Nunito Sans', sans-serif;
}
.mob-search input::placeholder { color: rgba(255,255,255,0.35); }
.mob-search button {
  background: transparent;
  border: none;
  padding: 10px 14px;
  color: rgba(255,255,255,0.5);
  cursor: pointer;
  font-size: 13px;
  transition: color 0.2s;
}
.mob-search button:hover { color: #ff6600; }
 
/* ── Nav Scroll Area ── */
.mob-nav-scroll {
  flex: 1;
  overflow-y: auto;
  overflow-x: hidden;
  padding: 8px 0 20px;
  scrollbar-width: thin;
  scrollbar-color: rgba(255,102,0,0.3) transparent;
}
.mob-nav-scroll::-webkit-scrollbar { width: 3px; }
.mob-nav-scroll::-webkit-scrollbar-thumb {
  background: rgba(255,102,0,0.4);
  border-radius: 3px;
}
 
/* ── Nav Section Label ── */
.mob-section-label {
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: rgba(255,255,255,0.25);
  padding: 14px 20px 6px;
}
 
/* ── Nav Item (plain link) ── */
.mob-nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  font-size: 13px;
  font-weight: 600;
  font-family: 'Nunito Sans', sans-serif;
  transition: all 0.2s;
  position: relative;
  border-left: 3px solid transparent;
}
.mob-nav-item:hover, .mob-nav-item.active {
  color: #fff;
  background: rgba(255,255,255,0.06);
  border-left-color: #ff6600;
}
.mob-nav-item .nav-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(255,255,255,0.07);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  transition: all 0.2s;
}
.mob-nav-item:hover .nav-icon, .mob-nav-item.active .nav-icon {
  background: rgba(255,102,0,0.2);
  box-shadow: 0 0 12px rgba(255,102,0,0.3);
}
 
/* ── Accordion (All Courses) ── */
.mob-accordion-item { border-left: 3px solid transparent; }
.mob-accordion-trigger {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  cursor: pointer;
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  font-weight: 700;
  font-family: 'Nunito Sans', sans-serif;
  transition: all 0.2s;
  user-select: none;
  position: relative;
}
.mob-accordion-trigger:hover {
  background: rgba(255,255,255,0.06);
  color: #fff;
}
.mob-accordion-item.open .mob-accordion-trigger {
  background: rgba(255,102,0,0.1);
  color: #fff;
  border-left: 3px solid #ff6600;
}
.mob-accordion-trigger .nav-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(255,102,0,0.25), rgba(255,102,0,0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(255,102,0,0.2);
}
.mob-accordion-trigger .acc-label { flex: 1; }
.mob-acc-arrow {
  font-size: 11px;
  color: rgba(255,255,255,0.4);
  transition: transform 0.3s cubic-bezier(0.68,-0.6,0.32,1.6);
}
.mob-accordion-item.open .mob-acc-arrow {
  transform: rotate(180deg);
  color: #ff6600;
}
 
/* ── Level 1: Category List ── */
.mob-accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  background: rgba(0,0,0,0.15);
}
.mob-accordion-body.open {
  max-height: 2000px;
}
 
/* ── Category Item (Level 1) ── */
.mob-cat-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px 10px 28px;
  cursor: pointer;
  color: rgba(255,255,255,0.6);
  font-size: 12px;
  font-weight: 600;
  font-family: 'Nunito Sans', sans-serif;
  transition: all 0.2s;
  border-left: 2px solid transparent;
  position: relative;
}
.mob-cat-item:hover, .mob-cat-item.open {
  background: rgba(255,255,255,0.05);
  color: rgba(255,255,255,0.9);
  border-left-color: rgba(255,102,0,0.5);
}
.mob-cat-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: rgba(255,102,0,0.4);
  flex-shrink: 0;
  transition: all 0.2s;
}
.mob-cat-item.open .mob-cat-dot, .mob-cat-item:hover .mob-cat-dot {
  background: #ff6600;
  box-shadow: 0 0 6px rgba(255,102,0,0.6);
}
.mob-cat-name { flex: 1; }
.mob-cat-count {
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.4);
  font-size: 9px;
  font-weight: 700;
  padding: 1px 6px;
  border-radius: 8px;
}
.mob-cat-arrow {
  font-size: 10px;
  color: rgba(255,255,255,0.3);
  transition: transform 0.3s ease, color 0.2s;
  margin-left: 2px;
}
.mob-cat-item.open .mob-cat-arrow {
  transform: rotate(180deg);
  color: #ff6600;
}
 
/* ── Course List (Level 2) ── */
.mob-course-list {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  background: rgba(0,0,0,0.1);
}
.mob-course-list.open { max-height: 1000px; }
 
.mob-course-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 18px 9px 44px;
  text-decoration: none;
  color: rgba(255,255,255,0.5);
  font-size: 11.5px;
  font-weight: 500;
  font-family: 'Nunito Sans', sans-serif;
  transition: all 0.2s;
  border-left: 2px solid transparent;
  position: relative;
}
.mob-course-item::before {
  content: '';
  position: absolute;
  left: 36px;
  top: 50%;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  transform: translateY(-50%);
  transition: all 0.2s;
}
.mob-course-item:hover {
  background: rgba(255,102,0,0.08);
  color: rgba(255,255,255,0.9);
  border-left-color: rgba(255,102,0,0.3);
  padding-left: 48px;
}
.mob-course-item:hover::before {
  background: #ff6600;
  box-shadow: 0 0 5px rgba(255,102,0,0.5);
}
.mob-course-popular {
  font-size: 8px;
  font-weight: 800;
  background: rgba(255,102,0,0.2);
  color: #ff9944;
  padding: 1px 5px;
  border-radius: 5px;
  border: 1px solid rgba(255,102,0,0.3);
  margin-left: auto;
  flex-shrink: 0;
}
 
/* ── View All Category Link ── */
.mob-view-all-cat {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px 10px 28px;
  color: rgba(255,102,0,0.7);
  font-size: 11px;
  font-weight: 700;
  text-decoration: none;
  font-family: 'Nunito Sans', sans-serif;
  transition: color 0.2s;
}
.mob-view-all-cat:hover { color: #ff6600; }
 
/* ── Sidebar Footer ── */
.mob-sidebar-foot {
  padding: 14px 16px;
  border-top: 1px solid rgba(255,255,255,0.07);
  background: rgba(0,0,0,0.2);
  flex-shrink: 0;
  display: flex;
  gap: 10px;
}
.mob-foot-btn {
  flex: 1;
  padding: 10px;
  border-radius: 10px;
  font-size: 11px;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  transition: all 0.2s;
  font-family: 'Nunito Sans', sans-serif;
}
.mob-foot-btn.primary {
  background: linear-gradient(135deg, #ff6600, #ff4400);
  color: #fff;
  box-shadow: 0 4px 15px rgba(255,102,0,0.35);
  border: none;
}
.mob-foot-btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(255,102,0,0.5);
}
.mob-foot-btn.secondary {
  background: rgba(255,255,255,0.07);
  color: rgba(255,255,255,0.7);
  border: 1px solid rgba(255,255,255,0.12);
}
.mob-foot-btn.secondary:hover {
  background: rgba(255,255,255,0.12);
  color: #fff;
}
 
/* Social row */
.mob-social-row {
  display: flex;
  justify-content: center;
  gap: 10px;
  padding: 0 16px 14px;
  background: rgba(0,0,0,0.2);
}
.mob-social-btn {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.5);
  font-size: 13px;
  text-decoration: none;
  transition: all 0.2s;
}
.mob-social-btn:hover {
  background: rgba(255,102,0,0.2);
  border-color: rgba(255,102,0,0.4);
  color: #ff6600;
  transform: translateY(-2px);
}
 
/* ════════════════════════════════════════════════
   MEDIA QUERIES — show hamburger on mobile only
════════════════════════════════════════════════ */
@media (max-width: 768px) {
  .hamburger-btn { display: flex; }
  /* Hide desktop nav on very small screens if you want — optional */
}
@media (min-width: 769px) {
  .mob-overlay, .mob-sidebar { display: none !important; }
}
 
/* ════════════════════════════════════════════════
   ENTRY ANIMATION for nav items
════════════════════════════════════════════════ */
.mob-sidebar.open .mob-nav-item,
.mob-sidebar.open .mob-accordion-trigger {
  animation: slideInLeft 0.4s ease both;
}
.mob-sidebar.open .mob-nav-item:nth-child(1) { animation-delay: 0.05s; }
.mob-sidebar.open .mob-nav-item:nth-child(2) { animation-delay: 0.1s; }
.mob-sidebar.open .mob-nav-item:nth-child(3) { animation-delay: 0.15s; }
.mob-sidebar.open .mob-nav-item:nth-child(4) { animation-delay: 0.2s; }
@keyframes slideInLeft {
  from { opacity: 0; transform: translateX(-16px); }
  to   { opacity: 1; transform: translateX(0); }
}
 
/* ── DEMO STYLES (only for preview) ── */
*{box-sizing:border-box;margin:0;padding:0;}
body{font-family:'Nunito Sans',sans-serif;background:#f0f0f5;}
.top-bar{background:#1a1a6e;padding:6px 32px;display:flex;justify-content:space-between;align-items:center;}
.top-bar-left{display:flex;gap:22px;}
.top-bar-left a{color:#ccc;font-size:12px;text-decoration:none;}
.top-bar-left a.highlight{color:#ff6600;font-weight:700;}
.top-bar-right{display:flex;align-items:center;gap:16px;}
.download-btn{background:#ff6600;color:#fff;font-size:11px;font-weight:700;padding:5px 14px;border-radius:20px;text-decoration:none;}
.social-icons{display:flex;gap:8px;}
.social-icons a{text-decoration:none;width:24px;height:24px;border-radius:50%;border:1px solid rgba(255,255,255,.3);display:flex;align-items:center;justify-content:center;color:#ccc;font-size:10px;}
.main-bar{background:#fff;padding:12px 32px;display:flex;align-items:center;gap:16px;border-bottom:1px solid #eee;position:relative;z-index:200;}
.logo-area{display:flex;align-items:center;gap:10px;min-width:220px;}
.logo-area img{height:52px;object-fit:contain;}
.search-bar{flex:1;display:flex;align-items:center;border:1.5px solid #ddd;border-radius:8px;overflow:hidden;background:#fafafa;}
.search-bar input{flex:1;border:none;background:transparent;padding:10px 14px;font-size:13px;color:#333;outline:none;}
.search-bar button{background:#1a1a6e;border:none;padding:10px 18px;cursor:pointer;color:#fff;}
.icon-group{display:flex;align-items:center;gap:16px;margin-left:8px;}
.icon-wrap{position:relative;cursor:pointer;}
.icon-wrap svg{width:26px;height:26px;fill:none;stroke:#1a1a6e;stroke-width:2;}
.badge{position:absolute;top:-7px;right:-7px;background:#ff6600;color:#fff;font-size:9px;font-weight:700;width:17px;height:17px;border-radius:50%;display:flex;align-items:center;justify-content:center;}
.nav-bar{background:#1a1a6e;padding:0 32px;display:flex;gap:0;}
.nav-bar a{color:#bbc;font-size:13px;font-weight:600;padding:12px 18px;text-decoration:none;border-bottom:3px solid transparent;display:block;white-space:nowrap;}
.nav-bar a:hover{color:#fff;border-bottom-color:#ff6600;}
@media(max-width:768px){
  .top-bar{display:none;}
  .main-bar{padding:8px 12px;gap:8px;}
  .logo-area img{height:38px;}
  .logo-area{min-width:unset;}
  .nav-bar{padding:0 8px;overflow-x:auto;-webkit-overflow-scrolling:touch;scrollbar-width:none;white-space:nowrap;}
  .nav-bar::-webkit-scrollbar{display:none;}
  .nav-bar a{font-size:11px;padding:9px 10px;}
  .search-bar{display:none;}
}
.demo-note{background:#1a1a6e;color:#fff;text-align:center;padding:10px;font-size:12px;font-weight:600;}