:root {
  color-scheme: dark;
}

select option {
  background-color: #0B0F14;
  color: #E2E8F0;
}

body {
  background-color: #080B10;
  color: #E2E8F0;
  background-image:
    radial-gradient(circle at 15% 50%, rgba(0, 229, 255, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 85% 30%, rgba(37, 99, 235, 0.12) 0%, transparent 50%),
    linear-gradient(to right, rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
  background-attachment: fixed;
}

.glass-panel {
  background: rgba(13, 17, 23, 0.65);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.text-gradient {
  background: linear-gradient(to right, #00E5FF, #3B82F6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.upload-card {
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.3s ease;
}

.fade-in {
  animation: fadeIn 0.8s ease-out forwards;
}

@keyframes fadeIn {
  0% { opacity: 0; transform: translateY(20px); }
  100% { opacity: 1; transform: translateY(0); }
}

.btn-glow {
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-glow:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0, 229, 255, 0.4);
}

.nexus-input {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: white;
  transition: all 0.3s ease;
}

.nexus-input:focus {
  outline: none;
  border-color: #00E5FF;
  box-shadow: 0 0 15px rgba(0, 229, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
}

canvas#particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  opacity: 0.5;
  pointer-events: none;
}

::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: #080B10; }
::-webkit-scrollbar-thumb { background: #1E293B; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #00E5FF; }

.tab-btn { transition: all 0.3s ease; }
.tab-btn.active {
  background: rgba(0, 229, 255, 0.1);
  border-color: #00E5FF;
  color: #00E5FF;
}

.auth-screen {
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}