:root{
  --background:#17142F;
  --background-deep:#0B0A1A;


  --card:#1F1B3A;
  --card-hover:#26214D;

  --primary:#8B5CF6;
  --primary-dark:#7C3AED;
  --secondary:#8079CD;

  --accent:#22C55E;
  --gold:#FBBF24;
  --gold-dark:#F59E0B;

  --text:#F8FAFC;
  --text-secondary:#C4C1E0;
  --text-muted:#8A86B8;

  --border:rgba(255,255,255,0.08);
}

body{
  background: radial-gradient(circle at top,#1A1633,var(--background-deep));
  color: var(--text);
  padding-bottom: 50px;
}

.hidden{
  display:none;
}

.custom-btn{
  background-color: var(--secondary);
  color: white;
}

.custom-btn:hover{
  opacity: 0.85;
  background-color: var(--primary);
}

.rad-color{
  border: thin solid black;
}

.question-card,
.stat-card,
.profile-panel{
  border:1px solid var(--border);
}

.question-card:hover,
.stat-card:hover{
  background:var(--card-hover);
}

/* Headers*/

/* Navigation bar */
#topnav{
  background:#8079CD;
  border-bottom:1px solid var(--border);
  box-shadow:0 6px 20px rgba(0,0,0,0.5);
}

#topnav a{
  color:white !important;
  font-weight:600;
}

.logo-font strong{
  color:#FBBF24;
}

#topnav a:hover {
  opacity: 0.85;
}

.logo-font{
  font-weight:700;
  letter-spacing:0.5px;
  color:white;
}

.user-icon{
  background: rgba(255,255,255,0.15);
  border: none;
  border-radius: 50%;
  width: 42px;
  height: 42px;
  color: white;
  font-size: 18px;
}

.user-icon:hover{
  background: rgba(255,255,255,0.25);
}

#topnav{
padding-left:40px;
padding-right:40px;
}

/* Question cards */
.container{
  background: transparent;
  padding-top: 40px;
}

.question-card{
  background: var(--card);
  border-radius:16px;
  padding:20px;
  margin-bottom:20px;
  border:1px solid rgba(255,255,255,0.05);
  box-shadow:0 10px 30px rgba(0,0,0,0.4);
  transition:all 0.25s ease;
}

.question-card:hover{
  transform:translateY(-6px) scale(1.02);
  border-color:var(--primary);
  box-shadow:0 20px 40px rgba(139,92,246,0.4);
}

.card-disabled{
  opacity:0.6;
}

.difficulty {
  padding: 4px 10px;
  border-radius: 8px;
  font-size: 0.8rem;
  font-weight: 600;
}

.easy{
  background:#22C55E;
  color:white;
}

.medium{
  background:#FBBF24;
  color:black;
}

.hard{
  background:#EF4444;
  color:white;
}

.points{
  color:var(--gold);
  font-weight:700;
  font-size:16px;
}

.premium_label{
  color:#8B5CF6;
  font-weight:600;
  margin-top:5px;
}

.solve-btn{
  background: linear-gradient(135deg,#8B5CF6,#A78BFA);
  color:white;
  border:none;
  border-radius:12px;
  padding:10px 18px;
  margin-top:14px;
  font-weight:700;
  transition:all 0.2s ease;
}

.solve-btn:hover{
  transform:translateY(-2px);
  box-shadow:0 10px 25px rgba(139,92,246,0.6);
}
.correct {
  color: var(--accent);
  font-weight: 600;
}

.wrong {
  color: var(--red);
  font-weight: 600;
}

.correct {
  animation: pop 0.3s ease;
}

@keyframes pop {
  0% {transform: scale(0.9);}
  100% {transform: scale(1);}
}

/* Dashboard */
.dashboard-container{
  margin-top:40px;
}

.dashboard-title{
  font-weight:700;
  margin-bottom:30px;
  text-align:center;
}

.dashboard-grid{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(220px,1fr));
  gap:20px;
}

.stat-card{
  background: var(--card);
  border-radius:16px;
  padding:25px;
  text-align:center;
  border:1px solid rgba(255,255,255,0.05);
  box-shadow:0 10px 30px rgba(0,0,0,0.4);
  transition:all 0.25s ease;
}

.stat-card:hover{
  transform:translateY(-5px);
  box-shadow:0 20px 40px rgba(139,92,246,0.4);
}

.stat-icon{
  font-size:28px;
  display:block;
  margin-bottom:10px;
}

.stat-number{
  font-size:28px;
  font-weight:700;
  display:block;
  color:var(--gold);
}

.stat-label{
  font-size:14px;
  opacity:0.8;
}

.premium-stat{
  border:2px solid #8B5CF6;
}

.upgrade-box{
  margin-top:30px;
  background:rgba(139,92,246,0.1);
  padding:20px;
  border-radius:12px;
  text-align:center;
}

.stat-card:nth-child(1) .stat-number{ color:#22C55E; }
.stat-card:nth-child(2) .stat-number{ color:#FBBF24; }
.stat-card:nth-child(3) .stat-number{ color:#8B5CF6; }

#accuracyChart{
  max-width:200px;
  margin:auto;
}

/* Profile Page */

.profile-container{
  max-width:700px;
}

.profile-panel{
  background: var(--card);
  border-radius:16px;
  padding:30px;
  border:1px solid rgba(255,255,255,0.05);
  box-shadow:0 10px 30px rgba(0,0,0,0.4);
}

.profile-row{
  display:flex;
  justify-content:space-between;
  padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,0.08);
}

.profile-row:last-child{
  border-bottom:none;
}

.profile-label{
  font-weight:600;
  opacity:0.8;
}

.profile-value{
  font-weight:600;
}

.premium-badge{
  background:linear-gradient(135deg,#8B5CF6,#7C3AED);
  padding:4px 10px;
  border-radius:8px;
  font-size:14px;
}

/* Footer */
footer{
  bottom: 0;
  position: fixed;
  background:#8079CD;
  color: var(--text);
  text-align: center;
  padding-top: 10px;
  width: 100%;
  margin-top: 20px;
}

/*` Upgrade Page */

.plan-card h3{
  font-weight:700;
  margin-bottom:10px;
}

.plan-card{
  position: relative;
  background: var(--card) !important;
  border: 1px solid var(--border) !important;
  border-radius:16px;
  padding:30px;
  text-align:center;
  overflow: hidden;
  transition: all 0.25s ease;
}

.plan-card:hover{
  transform:translateY(-10px) scale(1.04);
  border-color:var(--primary);
  background:var(--card-hover);
  box-shadow:0 30px 60px rgba(139,92,246,0.6);
}

.plan-content{
  padding:0;
}

.popular{
  border:2px solid #8B5CF6;
  background:linear-gradient(135deg,#1F1B3A,#2A2460);
  box-shadow:0 20px 40px rgba(139,92,246,0.4);
}

.popular::before{
  content:"BEST VALUE";
  position:absolute;
  top:10px;
  right:10px;
  background:var(--gold);
  color:#17132E;
  padding:4px 10px;
  border-radius:8px;
  font-size:12px;
  font-weight:700
}

/* Responsive */
@media (max-width: 768px) {
  .logo{
    font-size: 1.5rem;
    font-weight: 700;
  }
  .dashboard-title{
    font-size: 1.5rem;
    font-weight:600;
  }
  .stats-bar{
    flex-direction: column;
    gap:20px;
  }
  
  .stat{
    width:100%;
  }
}