:root {
  --background: 210 40% 98%;
  --foreground: 222 28% 16%;
  --primary: 215 84% 47%;
  --primary-foreground: 0 0% 100%;
  --secondary: 166 58% 42%;
  --secondary-foreground: 0 0% 100%;
  --muted: 214 32% 93%;
  --destructive: 0 74% 55%;
  --border: 214 25% 86%;
  --card: 0 0% 100%;
  --shadow-sm: 0 10px 30px -18px hsl(222 40% 15% / 0.22);
  --shadow-md: 0 18px 44px -22px hsl(222 40% 15% / 0.28);
  --shadow-lg: 0 28px 70px -28px hsl(222 45% 12% / 0.34);
  --transition-fast: 150ms ease;
  --transition-smooth: 280ms cubic-bezier(0.2, 0.8, 0.2, 1);
  --radius-sm: 0.65rem;
  --radius-md: 1rem;
  --radius-lg: 1.35rem;
}

.dark {
  --background: 222 30% 10%;
  --foreground: 210 40% 96%;
  --primary: 212 90% 61%;
  --primary-foreground: 0 0% 100%;
  --secondary: 166 65% 49%;
  --secondary-foreground: 0 0% 100%;
  --muted: 222 20% 18%;
  --destructive: 0 72% 58%;
  --border: 222 18% 24%;
  --card: 222 24% 13%;
  --shadow-sm: 0 10px 30px -18px hsl(0 0% 0% / 0.45);
  --shadow-md: 0 18px 44px -22px hsl(0 0% 0% / 0.52);
  --shadow-lg: 0 28px 70px -28px hsl(0 0% 0% / 0.62);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

::selection {
  background: hsl(var(--primary) / 0.2);
}

.line-clamp-3 {
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

@media (max-width: 640px) {
  .line-clamp-3 {
    -webkit-line-clamp: 4;
  }
}