:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  --page-bg: #f7f7fa;
  --surface: #f0f1f5;
  --surface-soft: #ffffff;
  --surface-strong: #ffffff;
  --surface-raised: #ffffff;
  --surface-muted: #eef0ff;
  --text-primary: #181a22;
  --text-secondary: #5d6474;
  --text-muted: #8b93a5;
  --border-soft: #dfe2ea;
  --border-strong: #c8ceda;
  --accent-cool: #6677ff;
  --focus-ring: rgba(102, 119, 255, 0.56);
  --shadow-subtle: rgba(25, 31, 54, 0.1);
}

:root[data-theme='dark'] {
  color-scheme: dark;
  --page-bg: #1b1c21;
  --surface: #24262d;
  --surface-soft: #202229;
  --surface-strong: #2a2c34;
  --surface-raised: #202229;
  --surface-muted: #2b2e3b;
  --text-primary: #f1f3f8;
  --text-secondary: #a9afbf;
  --text-muted: #747c90;
  --border-soft: #343741;
  --border-strong: #454957;
  --accent-cool: #8492ff;
  --focus-ring: rgba(132, 146, 255, 0.66);
  --shadow-subtle: rgba(0, 0, 0, 0.24);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme='light']) {
    color-scheme: dark;
    --page-bg: #1b1c21;
    --surface: #24262d;
    --surface-soft: #202229;
    --surface-strong: #2a2c34;
    --surface-raised: #202229;
    --surface-muted: #2b2e3b;
    --text-primary: #f1f3f8;
    --text-secondary: #a9afbf;
    --text-muted: #747c90;
    --border-soft: #343741;
    --border-strong: #454957;
    --accent-cool: #8492ff;
    --focus-ring: rgba(132, 146, 255, 0.66);
    --shadow-subtle: rgba(0, 0, 0, 0.24);
  }
}

* {
  box-sizing: border-box;
}

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

body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  background: var(--page-bg);
  color: var(--text-primary);
}

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

a {
  color: inherit;
}