/* ── 主题变量（与主站 globals.css 保持同步） ── */
:root {
  --radius: 0.625rem;
  --background: oklch(1 0 0);
  --foreground: oklch(0.145 0 0);
  --card: oklch(1 0 0);
  --card-foreground: oklch(0.145 0 0);
  --primary: oklch(20.463% 0.00002 271.152);
  --primary-foreground: oklch(0.985 0 0);
  --secondary: oklch(0.90 0 150);
  --secondary-foreground: oklch(0.205 0 0);
  --muted: oklch(0.95 0 271);
  --muted-foreground: oklch(0.556 0 0);
  --accent: oklch(0.87 0 271);
  --accent-foreground: oklch(0.205 0 0);
  --destructive: oklch(0.577 0.245 27.325);
  --destructive-foreground: oklch(0.985 0 0);
  --border: oklch(0.922 0 0);
  --input: oklch(0.922 0 0);
  --ring: oklch(0.708 0 0);
}

.dark {
  --background: oklch(0.145 0 0);
  --foreground: oklch(0.985 0 0);
  --card: oklch(0.205 0 0);
  --card-foreground: oklch(0.985 0 0);
  --primary: oklch(0.922 0 0);
  --primary-foreground: oklch(0.205 0 0);
  --secondary: oklch(0.269 0 0);
  --secondary-foreground: oklch(0.985 0 0);
  --muted: oklch(0.269 0 0);
  --muted-foreground: oklch(0.708 0 0);
  --accent: oklch(0.269 0 0);
  --accent-foreground: oklch(0.985 0 0);
  --destructive: oklch(0.704 0.191 22.216);
  --destructive-foreground: oklch(0.985 0 0);
  --border: oklch(1 0 0 / 10%);
  --input: oklch(1 0 0 / 15%);
  --ring: oklch(0.556 0 0);
}

/* 画布与容器 */
#c2canvasdiv {
  background: transparent;
}

canvas#c2canvas {
  background: transparent;
  border-radius: 8px;
  transition: box-shadow 160ms ease;
}

canvas#c2canvas:focus {
  outline: 2px solid var(--ring);
  outline-offset: 2px;
}

/* 滚动条 */
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: var(--muted); border-radius: 8px; }
*::-webkit-scrollbar-thumb { background: var(--muted-foreground); border-radius: 8px; }
*::-webkit-scrollbar-thumb:hover { background: var(--foreground); }
* { scrollbar-width: thin; scrollbar-color: var(--muted-foreground) var(--muted); }

/* 响应式 */
@media (max-width: 768px) {
  canvas#c2canvas { max-width: 100vw; max-height: 100vh; }
}
@media (max-width: 420px) {
  canvas#c2canvas { border-radius: 6px; }
}