/* Base - 重置 + 排版 */

* { margin: 0; padding: 0; box-sizing: border-box; }
html, body { height: 100%; width: 100%; }

body {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.6;
  background: var(--bg-app);
  color: var(--text-1);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease);
  overflow: hidden;
}

button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea { font-family: inherit; color: inherit; }

a { color: var(--accent-2); text-decoration: none; }
a:hover { text-decoration: underline; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

::selection { background: var(--accent-soft); color: var(--text-1); }

.flex { display: flex; }
.flex-1 { flex: 1; min-width: 0; }
.hidden { display: none !important; }
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}