:root {
  --background: 210 40% 98%;
  --foreground: 222 47% 11%;
  --primary: 255 84% 61%;
  --secondary: 186 66% 48%;
  --muted: 210 24% 93%;
  --destructive: 0 72% 54%;
  --border: 220 20% 84%;
  --card: 0 0% 100%;
  --shadow-sm: 0 8px 18px hsla(222, 47%, 11%, 0.06);
  --shadow-md: 0 18px 40px hsla(222, 47%, 11%, 0.1);
  --shadow-lg: 0 30px 70px hsla(255, 84%, 20%, 0.18);
  --transition-fast: 160ms ease;
  --transition-smooth: 280ms cubic-bezier(0.2, 0.8, 0.2, 1);
  --radius-sm: 0.75rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
}

.dark {
  --background: 228 28% 9%;
  --foreground: 210 40% 96%;
  --primary: 260 86% 68%;
  --secondary: 186 72% 56%;
  --muted: 226 20% 16%;
  --destructive: 0 74% 60%;
  --border: 226 18% 24%;
  --card: 228 24% 12%;
  --shadow-sm: 0 8px 18px hsla(0, 0%, 0%, 0.22);
  --shadow-md: 0 18px 40px hsla(0, 0%, 0%, 0.32);
  --shadow-lg: 0 30px 70px hsla(0, 0%, 0%, 0.45);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top right, hsla(255, 84%, 61%, 0.18), transparent 28%),
    radial-gradient(circle at left bottom, hsla(186, 66%, 48%, 0.14), transparent 28%),
    hsl(var(--background));
  color: hsl(var(--foreground));
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

#root {
  min-height: 100vh;
}

.card-surface {
  background: hsl(var(--card) / 0.88);
  border: 1px solid hsl(var(--border));
  box-shadow: var(--shadow-sm);
  backdrop-filter: blur(16px);
}

.glass-panel {
  background: linear-gradient(135deg, hsl(var(--card) / 0.92), hsl(var(--muted) / 0.7));
  border: 1px solid hsl(var(--border));
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(20px);
}

.focus-ring:focus-visible {
  outline: 2px solid hsl(var(--primary));
  outline-offset: 2px;
}

.fade-in {
  animation: fadeIn 0.35s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.scrollbar-thin {
  scrollbar-width: thin;
  scrollbar-color: hsl(var(--border)) transparent;
}

.scrollbar-thin::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

.scrollbar-thin::-webkit-scrollbar-thumb {
  background: hsl(var(--border));
  border-radius: 999px;
}