:root {
  --font-sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;

  --background: 216 40% 98%;
  --foreground: 222 47% 11%;
  --card: 0 0% 100%;
  --card-foreground: 222 47% 11%;
  --popover: 0 0% 100%;
  --popover-foreground: 222 47% 11%;
  --primary: 221 83% 53%;
  --primary-foreground: 210 40% 98%;
  --secondary: 214 32% 91%;
  --secondary-foreground: 222 47% 11%;
  --muted: 214 32% 91%;
  --muted-foreground: 215 16% 42%;
  --accent: 262 83% 58%;
  --accent-foreground: 210 40% 98%;
  --destructive: 0 72% 51%;
  --destructive-foreground: 210 40% 98%;
  --success: 142 71% 36%;
  --success-foreground: 210 40% 98%;
  --warning: 38 92% 45%;
  --warning-foreground: 222 47% 11%;
  --info: 199 89% 48%;
  --info-foreground: 210 40% 98%;
  --border: 214 32% 86%;
  --input: 214 32% 86%;
  --ring: 221 83% 53%;

  --radius: 0.625rem;
  --shadow-sm: 0 1px 2px hsl(var(--foreground) / 0.05);
  --shadow-md: 0 4px 12px hsl(var(--foreground) / 0.08);
  --shadow-lg: 0 12px 32px hsl(var(--foreground) / 0.12);
  --shadow-elegant: 0 16px 48px hsl(var(--primary) / 0.22);
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

.dark {
  --background: 222 47% 7%;
  --foreground: 210 40% 96%;
  --card: 222 47% 10%;
  --card-foreground: 210 40% 96%;
  --popover: 222 47% 10%;
  --popover-foreground: 210 40% 96%;
  --primary: 217 91% 60%;
  --primary-foreground: 222 47% 8%;
  --secondary: 217 33% 17%;
  --secondary-foreground: 210 40% 96%;
  --muted: 217 33% 17%;
  --muted-foreground: 215 20% 72%;
  --accent: 263 85% 68%;
  --accent-foreground: 222 47% 8%;
  --destructive: 0 84% 62%;
  --destructive-foreground: 222 47% 8%;
  --success: 142 69% 45%;
  --success-foreground: 222 47% 8%;
  --warning: 38 92% 55%;
  --warning-foreground: 222 47% 8%;
  --info: 199 89% 58%;
  --info-foreground: 222 47% 8%;
  --border: 217 33% 20%;
  --input: 217 33% 20%;
  --ring: 217 91% 60%;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: hsl(var(--background));
}

body {
  margin: 0;
  min-height: 100%;
  font-family: var(--font-sans);
  background: hsl(var(--background));
  color: hsl(var(--foreground));
}

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

input, select, textarea {
  font-size: max(16px, 1rem);
}

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

#root {
  min-height: 100vh;
}

.safe-page {
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
}

.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
}

.sheet-backdrop {
  animation: fadeIn var(--transition-smooth);
}

.sheet-panel {
  animation: slideUp var(--transition-smooth);
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { transform: translateY(1rem); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

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