:root {
  --ground: #12151c;
  --panel: #181d27;
  --panel-edge: #232a38;
  --ink: #d7dce6;
  --muted: #69738a;
  --accent: #e8a15c;
  --accent-ink: #1a1208;
  --error: #e0687a;
  --warn: #d9b45a;
  --ok: #8fbe7f;
  /* syntax */
  --syn-keyword: #8fb8f2;
  --syn-string: #9ece8c;
  --syn-number: #d6a26e;
  --syn-comment: #565f74;
  --syn-literal: #c79bd8;
  --mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;
  --code-size: 13.5px;
  --code-line: 1.65;
  --editor-w: 55%;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
}

body {
  display: flex;
  flex-direction: column;
  background: var(--ground);
  color: var(--ink);
  font-family: system-ui, -apple-system, sans-serif;
  font-size: 13px;
  overflow: hidden;
}

/* ---------- header ---------- */

.bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--panel-edge);
  background: var(--panel);
  flex: none;
}

.brand {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin: 0 4px 0 0;
}

.brand em {
  font-style: normal;
  color: var(--accent);
}

.status {
  color: var(--ok);
  font-size: 12px;
  min-width: 80px;
  opacity: 0;
  transition: opacity 0.25s;
}

.status.show { opacity: 1; }
.status.err { color: var(--error); }

.hints {
  margin-left: auto;
  color: var(--muted);
  font-size: 11.5px;
  display: flex;
  gap: 14px;
  align-items: center;
}

.hint {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

kbd {
  font-family: var(--mono);
  font-size: 10.5px;
  line-height: 1;
  background: var(--ground);
  border: 1px solid var(--panel-edge);
  border-radius: 4px;
  padding: 3px 5px;
  color: var(--ink);
}

button {
  font: inherit;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--panel-edge);
  border-radius: 6px;
  padding: 4px 14px;
  cursor: pointer;
}

button:hover { border-color: var(--muted); }

button:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

button.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
}

select {
  font: inherit;
  font-size: 12px;
  color: var(--ink);
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: 6px;
  padding: 3px 6px;
}

.toggle {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
}

.toggle input {
  accent-color: var(--accent);
  margin: 0;
}

button.primary:hover { filter: brightness(1.08); }

/* ---------- split layout ---------- */

.split {
  flex: 1;
  display: flex;
  min-height: 0;
}

.pane {
  min-width: 0;
  min-height: 0;
  display: flex;
}

.editor-pane {
  width: var(--editor-w);
  flex: none;
}

.console-pane { flex: 1; }

.divider {
  flex: none;
  width: 5px;
  cursor: col-resize;
  background: var(--panel-edge);
  transition: background 0.15s;
}

.divider:hover,
.divider.dragging { background: var(--accent); }

/* ---------- editor ---------- */

.gutter {
  flex: none;
  width: 44px;
  padding: 12px 10px 12px 0;
  overflow: hidden;
  text-align: right;
  color: var(--muted);
  font-family: var(--mono);
  font-size: var(--code-size);
  line-height: var(--code-line);
  white-space: pre;
  background: var(--panel);
  border-right: 1px solid var(--panel-edge);
  user-select: none;
}

.editor-stack {
  position: relative;
  flex: 1;
  min-width: 0;
}

.highlight,
.marks,
#editor {
  position: absolute;
  inset: 0;
  margin: 0;
  padding: 12px 16px;
  font-family: var(--mono);
  font-size: var(--code-size);
  line-height: var(--code-line);
  white-space: pre;
  overflow: auto;
  tab-size: 2;
}

.highlight {
  pointer-events: none;
  overflow: hidden;
  color: var(--ink);
}

.marks {
  pointer-events: none;
  overflow: hidden;
  color: transparent;
}

.marks .mark {
  background: rgba(143, 184, 242, 0.22);
  border-radius: 2px;
  box-shadow: 0 0 0 1px rgba(143, 184, 242, 0.35);
}

.marks .mark.caret {
  padding-left: 1.5px;
  margin-left: -1.5px;
  background: var(--accent);
  box-shadow: none;
}

#editor {
  resize: none;
  border: 0;
  background: transparent;
  color: transparent;
  caret-color: var(--accent);
  outline: none;
}

#editor::selection {
  background: rgba(143, 184, 242, 0.25);
  color: transparent;
}

.tok-keyword { color: var(--syn-keyword); }
.tok-string  { color: var(--syn-string); }
.tok-number  { color: var(--syn-number); }
.tok-comment { color: var(--syn-comment); font-style: italic; }
.tok-literal { color: var(--syn-literal); }
.tok-interp  { color: var(--syn-keyword); }

/* ---------- console ---------- */

.console {
  flex: 1;
  overflow: auto;
  padding: 8px 0;
  font-family: var(--mono);
  font-size: var(--code-size);
  line-height: var(--code-line);
}

.entry {
  display: flex;
  gap: 10px;
  padding: 3px 14px;
  border-bottom: 1px solid var(--panel-edge);
  white-space: pre-wrap;
  word-break: break-word;
}

.entry .tag {
  flex: none;
  width: 14px;
  color: var(--muted);
  user-select: none;
}

.entry.warn  { color: var(--warn); background: rgba(217, 180, 90, 0.06); }
.entry.error { color: var(--error); background: rgba(224, 104, 122, 0.07); }
.entry.result { color: var(--muted); }
.entry.result .val { color: var(--ink); }
.entry.info .tag { color: var(--syn-keyword); }

.entry .v-string  { color: var(--syn-string); }
.entry .v-number  { color: var(--syn-number); }
.entry .v-literal { color: var(--syn-literal); }
.entry .v-fn      { color: var(--syn-keyword); font-style: italic; }
.entry .v-key     { color: var(--ink); }

.console-empty {
  color: var(--muted);
  padding: 12px 14px;
}