:root {
  --base: #08090D;
  --panel: #0F1117;
  --panel-2: #14161E;
  --line: rgba(255, 255, 255, .075);
  --line-soft: rgba(255, 255, 255, .045);
  --text: #C9CEDC;
  --text-2: #7C8399;
  --text-3: #4C5266;
  --accent: #7C5CFF;
  --ok: #5FD3A6;
  --warn: #F0A868;
  --h-k: #C792EA;
  --h-t: #82AAFF;
  --h-f: #FFCB6B;
  --h-s: #9BD1A0;
  --h-n: #F78C6C;
  --h-c: #55607A;
  --h-p: #7FD1E0;
  --h-r: #6FD0C8;
  --h-o: #7E879E;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  --code-size: 13px;
  --code-lh: 1.62;
  --line-h: calc(var(--code-size) * 1.62);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  background: var(--base);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: -20% 0 auto;
  height: 42vh;
  background: radial-gradient(46% 62% at 50% 0%, rgba(124, 92, 255, .16), rgba(124, 92, 255, 0) 72%);
  pointer-events: none;
}

.app {
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100dvh;
}

/* ===== 顶栏 ===== */
.bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line-soft);
}

.brand {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  color: var(--text-2);
  text-decoration: none;
  transition: color .2s, background .2s;
}

.brand:hover { color: var(--text); background: rgba(255, 255, 255, .05); }

.logo {
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--text);
  margin-right: 2px;
}

.seg {
  display: inline-flex;
  padding: 2px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel-2);
}

.seg button {
  padding: 5px 13px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text-2);
  font-family: inherit;
  font-size: 12px;
  cursor: pointer;
  transition: background .18s, color .18s;
}

.seg button[aria-selected="true"] { background: var(--accent); color: #fff; }

.grow { flex: 1 1 auto; }

/* ===== 设置面板 ===== */
.settings { position: relative; display: flex; }

.panel {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  z-index: 30;
  width: 274px;
  max-height: calc(100dvh - 110px);
  overflow: auto;
  padding: 4px 0 10px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  box-shadow: 0 20px 44px rgba(0, 0, 0, .58);
}

.psec {
  padding: 11px 14px 3px;
  color: var(--text-3);
  font-size: 11px;
  letter-spacing: .1em;
}

.prow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 6px 14px;
  color: var(--text-2);
  font-size: 12px;
  cursor: pointer;
}

.prow:hover { color: var(--text); }

.prow select,
.prow input[type="number"] {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-2);
  color: var(--text);
  font-family: inherit;
  font-size: 12px;
  padding: 4px 6px;
}

.prow input[type="number"] { width: 58px; }

.prow input[type="checkbox"] {
  width: 14px;
  height: 14px;
  margin: 0;
  accent-color: var(--accent);
  cursor: pointer;
}

.run {
  padding: 7px 16px;
  border: 0;
  border-radius: 9px;
  background: var(--accent);
  color: #fff;
  font-family: inherit;
  font-size: 12px;
  letter-spacing: .04em;
  cursor: pointer;
  transition: filter .18s;
}

.run:hover { filter: brightness(1.1); }
.run:active { filter: brightness(.94); }

button:focus-visible, select:focus-visible, input:focus-visible, a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ===== 面板 ===== */
.panes {
  flex: 1 1 auto;
  min-height: 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  padding: 12px 16px 16px;
}

.pane {
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel);
  overflow: hidden;
}

.pane-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 8px 7px 12px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 12px;
}

.tag { color: var(--text-2); letter-spacing: .04em; }

.stat {
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
}

.verdict { font-size: 12px; }
.verdict[data-state="ok"] { color: var(--ok); }
.verdict[data-state="warn"] { color: var(--warn); }

.icon-btn {
  position: relative;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text-3);
  cursor: pointer;
  transition: color .18s, background .18s;
}

.icon-btn:hover { color: var(--text); background: rgba(255, 255, 255, .055); }

.icon-btn[aria-expanded="true"] { color: var(--text); background: rgba(255, 255, 255, .07); }

/* 选项非默认时的小圆点 */
.icon-btn.dirty::after {
  content: "";
  position: absolute;
  top: 5px;
  right: 5px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

[hidden] { display: none !important; }

/* ===== 编辑区 ===== */
.ed {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
}

.gutter {
  flex: none;
  width: 46px;
  padding: 12px 8px 12px 0;
  overflow: hidden;
  text-align: right;
  color: #363C52;
  font-family: var(--mono);
  font-size: var(--code-size);
  line-height: var(--code-lh);
  user-select: none;
}

.gutter-inner { will-change: transform; white-space: pre; }

.ed-body {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
}

.ed-body textarea,
.ed-body .hl-lines {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 12px 16px 12px 6px;
  border: 0;
  font-family: var(--mono);
  font-size: var(--code-size);
  line-height: var(--code-lh);
  letter-spacing: 0;
  tab-size: 4;
  white-space: pre;
  overflow-wrap: normal;
}

.ed-body textarea {
  background: transparent;
  color: transparent;
  caret-color: #E6E8EE;
  resize: none;
  outline: none;
  overflow: auto;
  z-index: 1;
}

.ed-body textarea::selection { background: rgba(124, 92, 255, .34); }

.ed-body .hl-lines {
  pointer-events: none;
  overflow: hidden;
  color: var(--text);
}

/* 逐行块：固定行高，保证与 textarea 逐行对齐 */
.sl, .ol {
  height: var(--line-h);
  white-space: pre;
}

.out {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  padding: 12px 16px;
  font-family: var(--mono);
  font-size: var(--code-size);
  line-height: var(--code-lh);
  tab-size: 4;
  color: var(--text);
}

/* ===== 差异标记（发丝级底色） ===== */
.sl.dl { background: rgba(255, 255, 255, .05); }
.ol.dc { background: rgba(124, 92, 255, .15); }
.ol.di { background: rgba(124, 92, 255, .065); }

.diff {
  font-size: 12px;
  color: var(--text-3);
  font-variant-numeric: tabular-nums;
}

/* ===== 拖入提示 ===== */
.drop {
  position: fixed;
  inset: 10px;
  z-index: 50;
  display: grid;
  place-items: center;
  border: 1.5px dashed rgba(124, 92, 255, .55);
  border-radius: 18px;
  background: rgba(8, 9, 13, .74);
  color: var(--accent);
  pointer-events: none;
}

/* ===== 高亮 ===== */
.hk { color: var(--h-k); }
.ht { color: var(--h-t); }
.hf { color: var(--h-f); }
.hs { color: var(--h-s); }
.hn { color: var(--h-n); }
.hc { color: var(--h-c); font-style: italic; }
.hp { color: var(--h-p); }
.hr { color: var(--h-r); }
.ho { color: var(--h-o); }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, .09);
  border: 3px solid transparent;
  border-radius: 10px;
  background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, .16); background-clip: content-box; }
::-webkit-scrollbar-corner { background: transparent; }

@media (max-width: 900px) {
  body { overflow: auto; }
  .app { height: auto; min-height: 100dvh; }
  .panes { grid-template-columns: 1fr; }
  .pane { min-height: 46vh; }
}

@media (prefers-reduced-motion: reduce) {
  * { transition-duration: .01ms !important; }
}