/* ═══ Base ═══ */

    :root {

      --topbar-h: 56px;

      --sidebar-w: 280px;

      --sidebar-collapsed-w: 0px;

      --font: Inter, ui-sans-serif, system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;

      --font-mono: "JetBrains Mono", "Fira Code", Consolas, monospace;

      --radius: 10px;

      --radius-sm: 6px;

    }



    * { box-sizing: border-box; margin: 0; padding: 0; }

    html { scroll-behavior: smooth; }

    body {

      font-family: var(--font);

      background: var(--bg);

      color: var(--text);

      line-height: 1.6;

      overflow: hidden;

      min-height: 100vh;

      min-height: 100dvh;

      overflow-x: hidden;

      transition: background 0.3s ease, color 0.3s ease;

    }