:root {
  --background: 226 40% 98%;
  --foreground: 228 25% 14%;
  --primary: 259 88% 61%;
  --secondary: 186 72% 42%;
  --muted: 228 24% 93%;
  --destructive: 0 73% 55%;
  --border: 229 20% 85%;
  --card: 0 0% 100%;

  --shadow-sm: 0 8px 20px hsla(228, 30%, 20%, 0.08);
  --shadow-md: 0 18px 40px hsla(228, 30%, 18%, 0.12);
  --shadow-lg: 0 28px 70px hsla(252, 60%, 25%, 0.18);

  --transition-fast: 180ms ease;
  --transition-smooth: 320ms cubic-bezier(0.22, 1, 0.36, 1);

  --radius-sm: 0.75rem;
  --radius-md: 1rem;
  --radius-lg: 1.5rem;
}

.dark {
  --background: 228 24% 10%;
  --foreground: 220 22% 94%;
  --primary: 263 90% 68%;
  --secondary: 186 72% 52%;
  --muted: 228 20% 16%;
  --destructive: 0 72% 60%;
  --border: 228 16% 24%;
  --card: 228 22% 13%;

  --shadow-sm: 0 8px 20px hsla(0, 0%, 0%, 0.3);
  --shadow-md: 0 18px 40px hsla(0, 0%, 0%, 0.38);
  --shadow-lg: 0 28px 70px hsla(0, 0%, 0%, 0.48);
}

* {
  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;
}

button,
input,
select,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

::selection {
  background: hsl(var(--primary) / 0.18);
}

.range-input {
  appearance: none;
  height: 0.55rem;
  border-radius: 999px;
  background: linear-gradient(90deg, hsl(var(--primary) / 0.85), hsl(var(--secondary) / 0.75));
  outline: none;
}

.range-input::-webkit-slider-thumb {
  appearance: none;
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 999px;
  background: white;
  box-shadow: 0 0 0 4px hsl(var(--primary) / 0.2), var(--shadow-sm);
  border: 2px solid hsl(var(--primary));
}

.range-input::-moz-range-thumb {
  width: 1.15rem;
  height: 1.15rem;
  border-radius: 999px;
  background: white;
  box-shadow: 0 0 0 4px hsl(var(--primary) / 0.2), var(--shadow-sm);
  border: 2px solid hsl(var(--primary));
}

input::placeholder,
textarea::placeholder {
  color: hsl(var(--foreground) / 0.4);
}