:root{
  --primary:#2b57d1;
  --primary-dark:#1c3f9e;
  --accent:#ff9f43;
  --bg:#eef2fb;
  --text:#1f2937;
  --muted:#6b7280;
  --error:#e0245e;
  --success:#16a34a;
  --radius:14px;
}

.modal-overlay {
    display: none; /* Hidden by default */
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-overlay.is-open {
    display: flex !important; /* Forces it to show when triggered */
}
*{box-sizing:border-box;margin:0;padding:0;}
html,body{height:100%;}
body{
  font-family:'Segoe UI',Roboto,Arial,sans-serif;
  color:var(--text);
  min-height:100vh;
  display:flex;
  flex-direction:column;
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
a,button,input,select{font-family:inherit;}
input:focus-visible,select:focus-visible,button:focus-visible,a:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;
}

main{
  flex:1;
  display:flex;
  flex-direction:column;
}

/* ===== NAVBAR ===== */
.navbar{
  position:sticky;
  top:0;
  z-index:50;
  background:#fff;
  border-bottom:1px solid #e5e9f2;
  box-shadow:0 2px 12px rgba(20,30,60,0.05);
}
.navbar-inner {
    max-width: 100% !important; /* Poori screen width force karne ke liye */
    width: 76%;
    margin: 0 auto;
    padding: 6px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
/*.navbar-inner{
  max-width:1180px;
  margin:0 auto;
  padding:14px 24px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}*/
.nav-brand{
  display:flex;align-items:center;gap:10px;
  font-weight:800;font-size:19px;color:var(--text);
  text-decoration:none;
}
.nav-brand .logo{
  width:34px;height:34px;border-radius:9px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  display:flex;align-items:center;justify-content:center;
  font-size:16px;
}
.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
    margin-left: auto; /* Dono taraf auto margin lagane se links */
    margin-right: auto; /* bilkul exact center mein align ho jayenge */
}
.nav-links li{position:relative;}
.nav-links a{
  text-decoration:none;
  color:var(--muted);
  font-size:14px;
  font-weight:600;
  transition:color .15s ease;
}
.nav-links a:hover,
.nav-links a.active{color:var(--primary);}

/* ---- Hover dropdown (desktop) ---- */
.nav-item-drop{display:flex;align-items:center;}
.nav-drop-toggle{
  display:flex;
  align-items:center;
  gap:5px;
  background:none;
  border:none;
  cursor:pointer;
  padding:0;
  color:var(--muted);
  font-size:14px;
  font-weight:600;
  font-family:inherit;
  transition:color .15s ease;
}
.nav-item-drop:hover .nav-drop-toggle,
.nav-item-drop:focus-within .nav-drop-toggle{color:var(--primary);}
.nav-drop-toggle .chev{
  width:9px;height:9px;
  transition:transform .2s ease;
}
.nav-item-drop:hover .nav-drop-toggle .chev,
.nav-item-drop:focus-within .nav-drop-toggle .chev{transform:rotate(180deg);}

.dropdown-panel{
  position:absolute;
  top:calc(100% + 16px);
  left:50%;
  transform:translateX(-50%) translateY(6px);
  background:#fff;
  border:1px solid #e5e9f2;
  border-radius:12px;
  box-shadow:0 18px 44px rgba(20,30,60,0.14);
  padding:8px;
  min-width:220px;
  display:flex;
  flex-direction:column;
  gap:2px;
  opacity:0;
  visibility:hidden;
  pointer-events:none;
  transition:opacity .18s ease, transform .18s ease, visibility .18s ease;
  z-index:60;
}
/* invisible bridge so the menu doesn't close while moving the cursor down to it */
.dropdown-panel:before{
  content:"";
  position:absolute;
  top:-16px;left:0;right:0;height:16px;
}
.dropdown-panel a{
  padding:9px 12px;
  border-radius:8px;
  font-size:13.5px;
  font-weight:600;
  color:var(--text);
  white-space:nowrap;
}
.dropdown-panel a:hover{background:var(--bg);color:var(--primary);}

/* Only the top-level panel reacts to the nav item hover (direct child only,
   so nested flyouts below don't all pop open at once). */
.nav-item-drop:hover > .dropdown-panel,
.nav-item-drop:focus-within > .dropdown-panel{
  opacity:1;
  visibility:visible;
  pointer-events:auto;
  transform:translateX(-50%) translateY(0);
}

/* ---- Nested flyouts (Subject -> Topic -> Subtopic) ---- */
.dropdown-panel-courses{min-width:240px;}
.dd-item{position:relative;}
.dd-row{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  padding:9px 12px;
  border-radius:8px;
  font-size:13.5px;
  font-weight:600;
  color:var(--text);
}
.dd-item:hover > .dd-row{background:var(--bg);color:var(--primary);}
.dd-chev{width:8px;height:8px;flex-shrink:0;color:var(--muted);}
.dd-item:hover > .dd-row .dd-chev{color:var(--primary);}
.dd-plain{padding:9px 12px;border-radius:8px;font-size:13.5px;font-weight:600;color:var(--text);white-space:nowrap;}
.dd-plain:hover{background:var(--bg);color:var(--primary);}

.dropdown-panel-nested{
  top:-8px;
  left:100%;
  margin-left:8px;
  transform:translateX(6px);
}
/* invisible bridge on the side so the flyout doesn't close while moving right */
.dropdown-panel-nested:before{
  top:0;left:-8px;right:auto;bottom:0;width:8px;height:auto;
}
.dd-item:hover > .dropdown-panel-nested,
.dd-item:focus-within > .dropdown-panel-nested{
  opacity:1;
  visibility:visible;
  pointer-events:auto;
  transform:translateX(0);
}

/* ---- Mobile accordion submenu ---- */
.nav-mobile-toggle{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  background:none;
  border:none;
  cursor:pointer;
  text-align:left;
  font-family:inherit;
  padding:12px 0;
  color:var(--text);
  font-size:14.5px;
  font-weight:600;
  border-bottom:1px solid #f1f3f9;
}
.nav-mobile-toggle .chev{width:10px;height:10px;transition:transform .2s ease;}
.nav-mobile-toggle.open .chev{transform:rotate(180deg);}
.nav-mobile-submenu{
  display:none;
  flex-direction:column;
  padding-left:14px;
}
.nav-mobile-submenu.open{display:flex;}
.nav-mobile-submenu a{border-bottom:none;padding:10px 0;font-weight:500;color:var(--muted);}
.nav-mobile-submenu .nav-mobile-toggle{
  border-bottom:none;
  padding:10px 0;
  font-weight:500;
  color:var(--muted);
}

.nav-actions{display:flex;align-items:center;gap:12px;}
.nav-btn-ghost{
  padding:9px 18px;
  border-radius:8px;
  border:1.5px solid #dfe4ee;
  background:#fff;
  font-size:13.5px;
  font-weight:700;
  color:var(--text);
  cursor:pointer;
  text-decoration:none;
  transition:border-color .15s ease, color .15s ease;
}
.nav-btn-ghost:hover{border-color:var(--primary);color:var(--primary);}
.nav-toggle{
  display:none;
  flex-direction:column;
  gap:5px;
  background:none;
  border:none;
  cursor:pointer;
  padding:6px;
}
.nav-toggle span{
  width:22px;height:2px;background:var(--text);border-radius:2px;
  transition:transform .2s ease, opacity .2s ease;
}
.nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
.nav-toggle.open span:nth-child(2){opacity:0;}
.nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

.nav-mobile-panel{
  display:none;
  flex-direction:column;
  padding:8px 24px 18px;
  border-top:1px solid #e5e9f2;
  background:#fff;
}
.nav-mobile-panel.open{display:flex;}
.nav-mobile-panel a{
  padding:12px 0;
  text-decoration:none;
  color:var(--text);
  font-size:14.5px;
  font-weight:600;
  border-bottom:1px solid #f1f3f9;
}
.nav-mobile-panel .nav-btn-ghost{
  margin-top:14px;
  text-align:center;
}

@media (max-width:860px){
  .nav-links,.nav-actions{display:none;}
  .nav-toggle{display:flex;}
}

/* ===== FOOTER ===== */
footer{
  background:#101b3d;
  color:#c4cbe6;
}
.footer-inner{
  max-width:1180px;
  margin:0 auto;
  padding:48px 24px 24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:32px;
  margin-bottom:36px;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand .logo{
  width:32px;height:32px;border-radius:8px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  display:flex;align-items:center;justify-content:center;font-size:15px;
}
.footer-brand span{font-weight:800;font-size:17px;color:#fff;}
.footer-col p{font-size:13.5px;line-height:1.7;color:#9aa4c7;max-width:280px;}
.footer-col h4{
  color:#fff;font-size:13.5px;font-weight:700;
  margin-bottom:16px;letter-spacing:0.4px;text-transform:uppercase;
}
.footer-col ul{list-style:none;}
.footer-col li{margin-bottom:11px;}
.footer-col a{
  color:#9aa4c7;text-decoration:none;font-size:13.5px;
  transition:color .15s ease;
}
.footer-col a:hover{color:#fff;}
.footer-social{display:flex;gap:10px;margin-top:16px;}
.footer-social a{
  width:34px;height:34px;border-radius:9px;
  background:rgba(255,255,255,0.06);
  display:flex;align-items:center;justify-content:center;
  color:#c4cbe6;text-decoration:none;font-size:14px;
  transition:background .15s ease, color .15s ease;
}
.footer-social a:hover{background:var(--primary);color:#fff;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.08);
  padding-top:20px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:10px;
  font-size:12.5px;
  color:#7c86ad;
}
.footer-bottom a{color:#9aa4c7;text-decoration:none;}
.footer-bottom a:hover{color:#fff;}
.footer-legal{display:flex;gap:18px;flex-wrap:wrap;}

@media (max-width:900px){
  .footer-grid{grid-template-columns:1fr 1fr;}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
  .navbar-inner{padding:12px 16px;}
}