:root {
  --background: #0f172a;
  --foreground: #f8fafc;
  --primary: #6366f1;
  --secondary: #a855f7;
  --accent: #f472b6;
  --card-bg: rgba(30, 41, 59, 0.7);
  --border-color: rgba(255, 255, 255, 0.1);
}

body {
  background-color: var(--background);
  color: var(--foreground);
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  margin: 0;
}

.glass-card {
  backdrop-filter: blur(24px);
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 1.5rem;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
  transition: all 0.3s ease;
  color: white;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
  filter: brightness(1.1);
}

.text-gradient {
  background: linear-gradient(135deg, #818cf8 0%, #c084fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Micro-animações */
@keyframes float {
  0% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
  100% { transform: translateY(0px); }
}

.animate-float {
  animation: float 6s ease-in-out infinite;
}

/* Scrollbar Customization */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.02);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(255, 255, 255, 0.2);
}

.assessment-grade-scroll {
  scrollbar-width: auto;
  scrollbar-color: rgba(129, 140, 248, 0.85) rgba(15, 23, 42, 0.9);
}

.assessment-grade-scroll::-webkit-scrollbar {
  width: 12px;
  height: 12px;
}

.assessment-grade-scroll::-webkit-scrollbar-track {
  background: rgba(15, 23, 42, 0.95);
  border-radius: 999px;
}

.assessment-grade-scroll::-webkit-scrollbar-thumb {
  background: rgba(129, 140, 248, 0.85);
  border: 3px solid rgba(15, 23, 42, 0.95);
  border-radius: 999px;
}

.assessment-grade-scroll::-webkit-scrollbar-corner {
  background: rgba(15, 23, 42, 0.95);
}