:root {
  color-scheme: light;
  --bg: #f8f7f4;
  --panel: #ffffff;
  --ink: #16181d;
  --muted: #5b6270;
  --line: #e2e0da;
  --accent: #1f6f5c;
  --accent-ink: #ffffff;
  --warn-bg: #fdf3e0;
  --warn-ink: #7a4b06;
  --error-bg: #fbe9e7;
  --error-ink: #93291e;
  --code-bg: #14171c;
  --code-ink: #e7ecf0;
  --radius: 10px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--ink);
  line-height: 1.55;
}
a { color: var(--accent); }
a:hover { text-decoration: none; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }
header.site {
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}
header.site .bar { display: flex; align-items: center; justify-content: space-between; padding: 16px 20px; }
.brand { font-weight: 700; font-size: 1.15rem; color: var(--ink); text-decoration: none; }
.brand span { color: var(--accent); }
nav.site-nav a { margin-left: 18px; font-size: 0.92rem; color: var(--muted); text-decoration: none; }
nav.site-nav a:hover { color: var(--ink); }
main { padding: 40px 0 64px; }
h1 { font-size: 2rem; margin: 0 0 12px; letter-spacing: -0.01em; }
h2 { font-size: 1.35rem; margin: 40px 0 12px; }
h3 { font-size: 1rem; margin: 0; }
p.lede { color: var(--muted); font-size: 1.05rem; max-width: 62ch; }
.tag { display: inline-block; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--accent); background: #e7f1ee; padding: 3px 8px; border-radius: 999px; margin-bottom: 10px; }

.tool { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; margin-top: 28px; }
.tool-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 780px) { .tool-grid { grid-template-columns: 1fr; } }
.dropzone {
  border: 1.5px dashed var(--line); border-radius: var(--radius); padding: 18px;
  text-align: center; color: var(--muted); cursor: pointer; font-size: 0.92rem;
}
.dropzone.drag { border-color: var(--accent); color: var(--accent); background: #f1f8f6; }
.csv-textarea {
  width: 100%; min-height: 160px; margin-top: 10px; padding: 10px 12px;
  border: 1px solid var(--line); border-radius: 8px; font: 13px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  resize: vertical; background: #fff; color: var(--ink);
}
.controls { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 14px; }
.controls label { display: flex; flex-direction: column; font-size: 0.82rem; color: var(--muted); gap: 4px; }
.controls input, .controls select { padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; font-size: 0.9rem; background: #fff; color: var(--ink); }
fieldset.targets { border: 1px solid var(--line); border-radius: 8px; margin-top: 14px; padding: 10px 12px; }
fieldset.targets legend { font-size: 0.78rem; color: var(--muted); padding: 0 4px; }
fieldset.targets label { display: inline-flex; align-items: center; gap: 6px; margin: 4px 12px 4px 0; font-size: 0.88rem; }
.btn-primary {
  margin-top: 16px; padding: 10px 18px; border: none; border-radius: 8px;
  background: var(--accent); color: var(--accent-ink); font-size: 0.95rem; font-weight: 600; cursor: pointer;
}
.btn-primary:hover { filter: brightness(1.08); }
.tool-status { margin-top: 10px; font-size: 0.85rem; min-height: 1.2em; color: var(--muted); }
.tool-status[data-kind="error"] { color: var(--error-ink); }
.tool-status[data-kind="warn"] { color: var(--warn-ink); }
.tool-output { display: flex; flex-direction: column; gap: 14px; }
.output-placeholder { color: var(--muted); font-size: 0.9rem; }
.output-pane { border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.pane-header { display: flex; align-items: center; justify-content: space-between; padding: 8px 12px; background: #f1efe9; }
.pane-header h3 { font-size: 0.85rem; }
.copy-btn { font-size: 0.78rem; padding: 4px 10px; border: 1px solid var(--line); border-radius: 6px; background: #fff; cursor: pointer; }
.copy-btn:hover { background: #f1efe9; }
.output-pane pre { margin: 0; padding: 12px; background: var(--code-bg); color: var(--code-ink); overflow-x: auto; font: 12.5px/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }

.example pre { margin: 10px 0 0; padding: 14px; background: var(--code-bg); color: var(--code-ink); border-radius: 8px; overflow-x: auto; font: 12.5px/1.55 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.example h3 { margin-top: 20px; font-size: 0.85rem; color: var(--muted); text-transform: uppercase; letter-spacing: 0.04em; }

.pro-panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; margin-top: 28px; }
.pro-panel h2 { margin-top: 0; }
.pro-panel ul { margin: 10px 0 0; padding-left: 20px; color: var(--muted); }
.pro-panel .coming-soon { display: inline-block; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.05em; color: var(--muted); border: 1px solid var(--line); padding: 2px 8px; border-radius: 999px; margin-left: 8px; }

.sibling-links { margin-top: 32px; }
.sibling-links ul { display: flex; flex-wrap: wrap; gap: 10px 18px; padding-left: 0; list-style: none; }

footer.site { border-top: 1px solid var(--line); padding: 24px 0 40px; color: var(--muted); font-size: 0.85rem; }
footer.site .foot-links a { margin-right: 14px; color: var(--muted); }
footer.site .foot-pro { margin-top: 8px; }
.notfound { padding: 60px 0; text-align: center; }