#jj-nav{
  position:fixed;top:0;left:0;right:0;z-index:99999;
  display:flex;align-items:center;gap:20px;padding:8px 22px;
  background:#ffffff;border-bottom:1px solid #e5e7eb;
  box-shadow:0 1px 6px rgba(15,23,42,.05);
  font-family:system-ui,"Segoe UI",Roboto,sans-serif;
}
body.jj-shell-pad{padding-top:60px !important;}

#jj-nav .jj-logo{display:flex;align-items:center;gap:10px;text-decoration:none;flex-shrink:0;}
#jj-nav .jj-logo img{width:34px;height:34px;border-radius:50%;object-fit:cover;object-position:center;}
#jj-nav .jj-logo-txt{display:flex;flex-direction:column;line-height:1.15;}
#jj-nav .jj-logo-txt b{font-size:16px;font-weight:800;color:#0f172a;letter-spacing:.2px;}
#jj-nav .jj-logo-txt b i{font-style:normal;color:#2563eb;}
#jj-nav .jj-logo-txt small{font-size:10.5px;color:#64748b;font-weight:500;}

#jj-nav .jj-tabs{display:flex;align-items:center;gap:6px;flex:1;overflow-x:auto;}
#jj-nav .jj-tab{
  display:flex;align-items:center;gap:7px;white-space:nowrap;
  padding:8px 14px;border-radius:9px;text-decoration:none;
  font-size:13.5px;font-weight:600;color:#475569;border:1px solid transparent;
}
#jj-nav .jj-tab svg{width:16px;height:16px;fill:currentColor;flex-shrink:0;}
#jj-nav .jj-tab:hover{background:#f1f5f9;}
#jj-nav .jj-tab.jj-active{background:#eff6ff;color:#2563eb;}
#jj-nav .jj-tab.jj-locked{opacity:.4;cursor:not-allowed;pointer-events:none;}
#jj-nav .jj-tab.jj-justunlocked{animation:jjGlow 1.1s ease-in-out 3;}
@keyframes jjGlow{
  0%,100%{box-shadow:0 0 0 0 rgba(37,99,235,.45);}
  50%{box-shadow:0 0 0 6px rgba(37,99,235,0);}
}

#jj-nav .jj-restart{
  flex-shrink:0;background:#f8fafc;color:#475569;border:1px solid #e2e8f0;
  border-radius:8px;padding:8px 14px;font:600 12.5px/1 inherit;cursor:pointer;
}
#jj-nav .jj-restart:hover{background:#eef2f7;color:#0f172a;}

@media (max-width:720px){
  #jj-nav{gap:12px;padding:8px 12px;}
  #jj-nav .jj-logo-txt small{display:none;}
  #jj-nav .jj-tab span{display:none;}
  #jj-nav .jj-tab{padding:8px 10px;}
}

@media print{#jj-nav{display:none;}body.jj-shell-pad{padding-top:0 !important;}}

/* ── 100% FULL-SCREEN INSTRUCTIONS PAGE (ROUNDS 1, 2, 3) ── */
#assessment-instructions-overlay,
#coding-instructions-overlay,
#instructions-modal-overlay {
  position: fixed !important;
  top: 0 !important;
  left: 0 !important;
  right: 0 !important;
  bottom: 0 !important;
  width: 100vw !important;
  height: 100vh !important;
  width: 100% !important;
  height: 100% !important;
  z-index: 100000 !important;
  background: #f8fafc !important;
  display: none;
  flex-direction: column !important;
  padding: 0 !important;
  margin: 0 !important;
  box-sizing: border-box !important;
  overflow: hidden !important;
}

#assessment-instructions-overlay.open,
#coding-instructions-overlay.open,
#instructions-modal-overlay.open {
  display: flex !important;
}

#assessment-instructions-overlay .modal-card,
#coding-instructions-overlay .modal-card,
#instructions-modal-overlay .modal-card {
  position: relative !important;
  top: 0 !important;
  left: 0 !important;
  transform: none !important;
  width: 100% !important;
  height: 100% !important;
  max-width: 100% !important;
  max-height: 100% !important;
  border-radius: 0 !important;
  border: none !important;
  box-shadow: none !important;
  padding: 0 !important;
  margin: 0 !important;
  display: flex !important;
  flex-direction: column !important;
  background: #f8fafc !important;
  box-sizing: border-box !important;
  flex: 1 1 100% !important;
  overflow: hidden !important;
}

#assessment-instructions-overlay .modal-header,
#coding-instructions-overlay .modal-header,
#instructions-modal-overlay .modal-header {
  flex-shrink: 0 !important;
  min-height: 72px !important;
  background: #ffffff !important;
  border-bottom: 1px solid #e2e8f0 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: space-between !important;
  padding: 16px 36px !important;
  box-shadow: 0 1px 4px rgba(15, 23, 42, 0.05) !important;
  z-index: 10 !important;
  box-sizing: border-box !important;
}

#assessment-instructions-overlay .modal-body,
#coding-instructions-overlay .modal-body,
#instructions-modal-overlay .modal-body {
  flex: 1 1 auto !important;
  overflow-y: auto !important;
  -webkit-overflow-scrolling: touch !important;
  overscroll-behavior: contain !important;
  padding: 36px 24px 44px !important;
  box-sizing: border-box !important;
  background: #f8fafc !important;
}

#assessment-instructions-overlay .modal-footer,
#coding-instructions-overlay .modal-footer,
#instructions-modal-overlay .modal-footer {
  flex-shrink: 0 !important;
  min-height: 72px !important;
  background: #ffffff !important;
  border-top: 1px solid #e2e8f0 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: flex-end !important;
  padding: 14px 36px !important;
  gap: 14px !important;
  box-shadow: 0 -2px 10px rgba(15, 23, 42, 0.04) !important;
  z-index: 10 !important;
  box-sizing: border-box !important;
}

#assessment-instructions-overlay .modal-body::-webkit-scrollbar,
#coding-instructions-overlay .modal-body::-webkit-scrollbar,
#instructions-modal-overlay .modal-body::-webkit-scrollbar {
  width: 8px;
}
#assessment-instructions-overlay .modal-body::-webkit-scrollbar-track,
#coding-instructions-overlay .modal-body::-webkit-scrollbar-track,
#instructions-modal-overlay .modal-body::-webkit-scrollbar-track {
  background: #f1f5f9;
}
#assessment-instructions-overlay .modal-body::-webkit-scrollbar-thumb,
#coding-instructions-overlay .modal-body::-webkit-scrollbar-thumb,
#instructions-modal-overlay .modal-body::-webkit-scrollbar-thumb {
  background: #cbd5e1;
  border-radius: 4px;
}
#assessment-instructions-overlay .modal-body::-webkit-scrollbar-thumb:hover,
#coding-instructions-overlay .modal-body::-webkit-scrollbar-thumb:hover,
#instructions-modal-overlay .modal-body::-webkit-scrollbar-thumb:hover {
  background: #94a3b8;
}

.instructions-inner-container {
  max-width: 900px;
  margin: 0 auto;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 14px;
  padding: 32px 40px;
  box-shadow: 0 4px 16px rgba(15, 23, 42, 0.04);
}