/**
 * MDC Design System — base
 * Requires tokens.css first.
 */

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--mdc-font-sans);
  font-size: 14px;
  line-height: 1.5;
  color: var(--mdc-fg);
  background: var(--mdc-bg);
  font-feature-settings: 'cv11', 'ss01', 'tnum';
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.lang-en .zh-only { display: none; }
body.lang-zh .en-only { display: none; }

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--mdc-ink-primary);
  margin: 0;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 2px;
}

:focus-visible {
  outline: 2px solid var(--mdc-brand);
  outline-offset: 2px;
}

::selection {
  background: var(--mdc-brand);
  color: var(--mdc-brand-ink);
}

/* Dense data default */
.tabular, .num, [data-num] {
  font-variant-numeric: tabular-nums;
  font-feature-settings: 'tnum';
}

/* Scrollbar — minimal mono */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--mdc-surface-2); }
::-webkit-scrollbar-thumb {
  background: var(--mdc-surface-4);
  border-radius: var(--mdc-radius);
}
::-webkit-scrollbar-thumb:hover { background: var(--mdc-ink-muted); }

input[type='range'] {
  accent-color: var(--mdc-brand);
}