:root {
  /* Farbpalette: bewusst reduziert (weiss / hellgrau / dunkelgrau / blau) */
  --color-bg: #ffffff;
  --color-surface: #f4f5f7;
  --color-surface-hover: #eceef2;
  --color-border: #e2e4e9;
  --color-text: #1f2430;
  --color-text-muted: #6b7280;
  --color-accent: #2f5fde;
  --color-accent-dark: #1f3f9e;
  --color-accent-tint: #eaf0fe;
  --color-board-bg: #1f2430;
  --color-board-text: #f4f5f7;
  --color-danger: #c0362c;
  --color-danger-tint: #fbeceb;
  --color-success: #1e7a4a;

  /* Typografie */
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Code", "Roboto Mono", Consolas, monospace;

  /* Layout */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(31, 36, 48, 0.06);
  --shadow-md: 0 4px 16px rgba(31, 36, 48, 0.08);
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-ui);
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

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

button {
  cursor: pointer;
}

a {
  color: var(--color-accent);
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}