/* ============================================================================
   全站共用的主题 / 字号 / 行距设置
   用法：每个页面 <head> 里引用 theme.css，</body> 前引用 theme.js
   存储：localStorage['tk_prefs'] = { theme, fs, rh }
   ========================================================================== */

/* ---------- 浅色主题变量（覆盖页面自己的深色变量） ---------- */
html[data-theme="light"] {
  color-scheme: light;
  --bg: #f5f7fb;
  --panel: #ffffff;
  --panel-2: #eef2f8;
  --line: rgba(15, 23, 42, .12);
  --line-2: rgba(15, 23, 42, .22);
  --text: #0f172a;
  --dim: #3f4c60;
  --muted: #6b7a90;
  --accent: #0b7fc4;
  --accent-2: #6d4bd8;
  --green: #0f9d63;
  --red: #d1382f;
  --code-bg: #ffffff;
  --out-bg: #fbfcfe;
  --hover: rgba(15, 23, 42, .05);
  --glow-a: rgba(11, 127, 196, .10);
  --glow-b: rgba(109, 75, 216, .10);
}

html[data-theme="light"] body {
  background-color: #f5f7fb;
}

/* ---------- 设置按钮 ---------- */
.tk-theme-btn {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border: 1px solid transparent;
  border-radius: 8px;
  background: transparent;
  color: var(--muted, #6f7d92);
  cursor: pointer;
  transition: .16s;
}
.tk-theme-btn:hover { background: var(--hover, rgba(255,255,255,.06)); color: var(--text, #e8eef8); }
.tk-theme-btn.on { background: var(--hover, rgba(255,255,255,.06)); color: var(--text, #e8eef8); }
.tk-theme-btn svg { width: 17px; height: 17px; fill: currentColor; }

.tk-theme-fixed {
  position: fixed;
  top: 14px;
  right: 16px;
  z-index: 60;
  border: 1px solid var(--line, rgba(255,255,255,.12));
  border-radius: 10px;
  background: var(--panel, #0d121c);
  backdrop-filter: blur(10px);
}

/* ---------- 弹层 ---------- */
.tk-pop {
  position: absolute;
  top: 40px;
  right: 0;
  width: 300px;
  max-width: calc(100vw - 32px);
  padding: 12px;
  border: 1px solid var(--line-2, rgba(255,255,255,.16));
  border-radius: 12px;
  background: var(--panel, #0d121c);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .45);
  z-index: 70;
  font-family: "Segoe UI", "Microsoft YaHei", -apple-system, sans-serif;
}
.tk-pop[hidden] { display: none; }
.tk-pop--fixed { position: fixed; top: 56px; right: 16px; }
.tk-pop h3 {
  margin: 2px 6px 10px;
  font-size: calc(12px * var(--fs-scale, 1));
  color: var(--muted, #6f7d92);
  font-weight: 600;
}
.tk-seg { display: flex; gap: 6px; padding: 0 4px 10px; }
.tk-seg button {
  flex: 1;
  padding: 6px 8px;
  border: 1px solid var(--line, rgba(255,255,255,.12));
  border-radius: 8px;
  background: transparent;
  color: var(--dim, #a9b6c9);
  font-size: calc(12px * var(--fs-scale, 1));
  cursor: pointer;
}
.tk-seg button.on {
  border-color: var(--accent, #4cc2ff);
  color: var(--accent, #4cc2ff);
  background: color-mix(in srgb, var(--accent, #4cc2ff) 12%, transparent);
}
.tk-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 6px;
  font-size: calc(12.5px * var(--fs-scale, 1));
  color: var(--dim, #a9b6c9);
}
.tk-row label { flex: 0 0 48px; }
.tk-row input[type=range] {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 5px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--text, #e8eef8) 16%, transparent);
  outline: none;
}
.tk-row input[type=range]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 13px; height: 13px;
  border-radius: 50%;
  background: var(--accent, #4cc2ff);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent, #4cc2ff) 22%, transparent);
}
.tk-row input[type=range]::-moz-range-thumb {
  width: 13px; height: 13px; border: 0; border-radius: 50%;
  background: var(--accent, #4cc2ff);
}
.tk-row output {
  width: 44px;
  text-align: right;
  color: var(--muted, #6f7d92);
  font-family: ui-monospace, Consolas, monospace;
  font-size: calc(11.5px * var(--fs-scale, 1));
}
.tk-reset {
  width: 100%;
  margin-top: 6px;
  padding: 7px;
  border: 1px solid var(--line, rgba(255,255,255,.12));
  border-radius: 8px;
  background: transparent;
  color: var(--muted, #6f7d92);
  font-size: calc(12px * var(--fs-scale, 1));
  cursor: pointer;
}
.tk-reset:hover { color: var(--text, #e8eef8); border-color: var(--line-2, rgba(255,255,255,.2)); }