:root {
  --background: 222 43% 98%;
  --foreground: 226 33% 13%;
  --primary: 258 91% 63%;
  --secondary: 196 72% 82%;
  --muted: 223 26% 92%;
  --destructive: 2 78% 58%;
  --border: 224 24% 84%;
  --card: 0 0% 100%;

  --shadow-sm: 0 8px 18px hsla(230, 45%, 16%, 0.06);
  --shadow-md: 0 16px 40px hsla(230, 45%, 16%, 0.12);
  --shadow-lg: 0 24px 70px hsla(246, 70%, 18%, 0.18);

  --transition-fast: 160ms ease;
  --transition-smooth: 280ms cubic-bezier(0.22, 1, 0.36, 1);

  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
}

.dark {
  --background: 230 32% 10%;
  --foreground: 220 25% 94%;
  --primary: 267 92% 70%;
  --secondary: 197 45% 25%;
  --muted: 227 20% 18%;
  --destructive: 5 86% 66%;
  --border: 226 18% 24%;
  --card: 228 24% 14%;

  --shadow-sm: 0 10px 18px hsla(0, 0%, 0%, 0.24);
  --shadow-md: 0 16px 40px hsla(0, 0%, 0%, 0.34);
  --shadow-lg: 0 30px 80px hsla(257, 84%, 5%, 0.5);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: hsl(var(--background));
  color: hsl(var(--foreground));
}

::selection {
  background: hsl(var(--primary) / 0.22);
}

.glass-panel {
  background: linear-gradient(180deg, hsl(var(--card) / 0.94), hsl(var(--card) / 0.82));
  backdrop-filter: blur(14px);
}

.skeleton {
  position: relative;
  overflow: hidden;
  background: linear-gradient(90deg, hsl(var(--muted) / 0.65), hsl(var(--card) / 0.95), hsl(var(--muted) / 0.65));
  background-size: 220% 100%;
  animation: shimmer 1.4s infinite linear;
}

@keyframes shimmer {
  0% {
    background-position: 200% 0;
  }
  100% {
    background-position: -200% 0;
  }
}

button,
a {
  transition: all var(--transition-fast);
}