:root {
  --bg: #ffffff;
  --panel: #ffffff;
  --panel-2: #f6f6f8;
  --canvas-bg: #eceef1;
  --text: #1d1d21;
  --muted: #6b6f78;
  --faint: #9aa0aa;
  --border: #e4e5ea;
  --accent: #5b47e0;
  --accent-soft: #eeebff;
  --accent-text: #ffffff;
  --shadow: 0 10px 30px rgba(20, 20, 40, .14), 0 2px 6px rgba(20, 20, 40, .08);
  --radius: 10px;
  --font: "Inter", ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #17181c; --panel: #1e1f24; --panel-2: #26272e; --canvas-bg: #111215; --text: #e9e9ee; --muted: #a0a3ad; --faint: #737782;
    --border: #2f3038; --accent: #8b7bff; --accent-soft: #2c2752; --shadow: 0 10px 30px rgba(0,0,0,.5), 0 2px 6px rgba(0,0,0,.4);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #17181c; --panel: #1e1f24; --panel-2: #26272e; --canvas-bg: #111215; --text: #e9e9ee; --muted: #a0a3ad; --faint: #737782;
  --border: #2f3038; --accent: #8b7bff; --accent-soft: #2c2752; --shadow: 0 10px 30px rgba(0,0,0,.5), 0 2px 6px rgba(0,0,0,.4);
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body { background: var(--bg); color: var(--text); font: 14px/1.5 var(--font); -webkit-font-smoothing: antialiased; }
button, input, select, textarea { font: inherit; color: inherit; }
a { color: var(--accent); }
.grow { flex: 1; }
.muted { color: var(--muted); }

.btn { display: inline-flex; align-items: center; gap: 6px; height: 30px; padding: 0 10px; border-radius: 8px; border: 1px solid var(--border); background: var(--panel); cursor: pointer; text-decoration: none; color: var(--text); font-size: 13px; white-space: nowrap; }
.btn:hover { background: var(--panel-2); }
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { border-color: transparent; background: transparent; color: var(--muted); }
.btn.ghost:hover { background: var(--panel-2); color: var(--text); }
.btn.small { height: 26px; font-size: 12px; padding: 0 8px; }
.btn:disabled { opacity: .5; cursor: default; }
.icon-btn { display: inline-grid; place-items: center; width: 32px; height: 32px; border: 0; border-radius: 8px; background: transparent; color: var(--muted); cursor: pointer; padding: 0; }
.icon-btn:hover { background: var(--panel-2); color: var(--text); }
.icon-btn.on { background: var(--accent-soft); color: var(--accent); }
kbd { font: 11px/1 var(--mono); padding: 2px 4px; border-radius: 4px; background: var(--panel-2); color: var(--muted); border: 1px solid var(--border); }

#toast { position: fixed; left: 50%; bottom: 28px; translate: -50% 20px; opacity: 0; background: #222; color: #fff; padding: 8px 14px; border-radius: 8px; font-size: 13px; z-index: 99999; transition: .2s; pointer-events: none; }
#toast.show { opacity: 1; translate: -50% 0; }
[hidden] { display: none !important; }

#paywall { position: fixed; inset: 0; z-index: 100000; display: grid; place-items: center; padding: 16px; background: rgba(10, 10, 20, .45); }
#paywall .pw-card { position: relative; width: min(760px, 100%); max-height: calc(100vh - 32px); overflow: auto; background: var(--panel); border-radius: 16px; box-shadow: var(--shadow); padding: 24px; }
#paywall h2 { margin: 0 0 4px; font-size: 20px; }
#paywall p { margin: 0 0 18px; color: var(--muted); }
#paywall .pw-close { position: absolute; top: 10px; right: 12px; width: 32px; height: 32px; border: 0; border-radius: 8px; background: transparent; color: var(--muted); font-size: 22px; cursor: pointer; }
#paywall .pw-close:hover { background: var(--panel-2); color: var(--text); }