:root {
  --background: 220 35% 97%;
  --foreground: 224 30% 14%;
  --primary: 257 84% 60%;
  --secondary: 190 70% 52%;
  --muted: 220 22% 92%;
  --destructive: 0 78% 58%;
  --border: 224 20% 84%;
  --card: 0 0% 100%;
  --shadow-sm: 0 1px 2px hsla(224, 30%, 14%, 0.08);
  --shadow-md: 0 12px 28px hsla(252, 60%, 20%, 0.12);
  --shadow-lg: 0 24px 60px hsla(252, 60%, 20%, 0.18);
  --transition-fast: 160ms ease;
  --transition-smooth: 280ms ease;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
}

.dark {
  --background: 228 28% 9%;
  --foreground: 210 30% 96%;
  --primary: 262 90% 70%;
  --secondary: 191 83% 62%;
  --muted: 226 18% 16%;
  --destructive: 0 75% 62%;
  --border: 224 15% 24%;
  --card: 226 20% 13%;
  --shadow-sm: 0 1px 2px hsla(0, 0%, 0%, 0.3);
  --shadow-md: 0 12px 28px hsla(0, 0%, 0%, 0.35);
  --shadow-lg: 0 24px 60px hsla(0, 0%, 0%, 0.45);
}

* {
  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;
  background:
    radial-gradient(circle at top, hsla(257, 84%, 60%, 0.12), transparent 30%),
    radial-gradient(circle at right, hsla(190, 70%, 52%, 0.1), transparent 25%),
    hsl(var(--background));
  min-height: 100vh;
}

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

.card {
  background: hsl(var(--card));
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.card-strong {
  background: linear-gradient(180deg, hsla(0,0%,100%,0.7), hsla(0,0%,100%,0.45));
  background-color: hsl(var(--card));
  border: 1px solid hsl(var(--border));
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.dark .card-strong {
  background: linear-gradient(180deg, hsla(0,0%,100%,0.03), hsla(0,0%,100%,0.01));
  background-color: hsl(var(--card));
}

.input {
  width: 100%;
  border: 1px solid hsl(var(--border));
  background: hsl(var(--card));
  color: hsl(var(--foreground));
  border-radius: var(--radius-sm);
  padding: 0.8rem 0.95rem;
  outline: none;
}

.input:focus {
  border-color: hsl(var(--primary));
  box-shadow: 0 0 0 4px hsla(257, 84%, 60%, 0.14);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border-radius: var(--radius-sm);
  padding: 0.8rem 1rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
}

.btn-primary {
  background: hsl(var(--primary));
  color: white;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: hsla(var(--secondary), 0.12);
  color: hsl(var(--secondary));
  border-color: hsla(var(--secondary), 0.18);
}

.btn-muted {
  background: hsl(var(--muted));
  color: hsl(var(--foreground));
  border-color: hsl(var(--border));
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 700;
}

.fade-in {
  animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}