:root {
  --bg: #f3f5f9;
  --card: #ffffff;
  --line: #e2e8f1;
  --ink: #1b2432;
  --muted: #6b7789;
  --accent: #2f6df6;
  --mark: #c0392b;
}

* { box-sizing: border-box; }

[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 14px/1.6 "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 22px;
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 10;
}

.brand { display: flex; align-items: baseline; gap: 9px; }
.brand .dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  transform: translateY(-1px);
}
.brand strong { font-size: 15px; letter-spacing: 0.2px; }
.brand .sub { font-size: 11.5px; color: var(--muted); }

.nav { display: flex; gap: 6px; }
.nav a {
  font-size: 12.5px;
  color: var(--muted);
  text-decoration: none;
  padding: 5px 11px;
  border-radius: 8px;
}
.nav a:hover { background: #eef2f8; }
.nav a.on { background: #e8effd; color: var(--accent); font-weight: 600; }

.wrap {
  display: grid;
  grid-template-columns: 360px minmax(0, 1fr);
  gap: 16px;
  padding: 16px;
  align-items: start;
  max-width: 1500px;
  margin: 0 auto;
}

.input-card, .result-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 14px 16px 16px;
  box-shadow: 0 1px 2px rgba(24, 40, 68, 0.04), 0 12px 30px -24px rgba(24, 40, 68, 0.35);
}

.card-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}
.card-head h2 { margin: 0; font-size: 13.5px; font-weight: 700; }
.card-head .hint { font-size: 11px; color: var(--muted); }

textarea#pts {
  width: 100%;
  height: 132px;
  resize: vertical;
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fbfcfe;
  color: var(--ink);
  font: 13px/1.75 ui-monospace, "Cascadia Mono", Consolas, monospace;
  outline: none;
}
textarea#pts:focus { border-color: #b9cdf8; background: #fff; }

.modes {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin: 11px 0 8px;
}
.modes button {
  padding: 7px 6px;
  font-size: 12px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  border-radius: 9px;
  cursor: pointer;
  white-space: nowrap;
  transition: 0.15s;
}
.modes button:hover { border-color: #cbd8ee; color: var(--ink); }
.modes button.on {
  background: #eaf1ff;
  border-color: #c3d6fb;
  color: var(--accent);
  font-weight: 600;
}

.quick { display: grid; grid-template-columns: repeat(3, 1fr); gap: 6px; }
.ghost {
  padding: 6px 4px;
  font-size: 11px;
  line-height: 1.35;
  color: var(--muted);
  background: #f7f9fc;
  border: 1px dashed var(--line);
  border-radius: 8px;
  cursor: pointer;
}
.ghost:hover { color: var(--accent); border-color: #c3d6fb; }

.canvas {
  min-height: 420px;
  display: grid;
  place-items: center;
  padding: 4px;
}
.canvas svg {
  max-width: 100%;
  height: auto;
}

.report {
  margin-top: 10px;
  border-top: 1px dashed var(--line);
  padding-top: 10px;
  font-size: 12.5px;
  color: var(--ink);
  max-width: 660px;
}
.report:empty { display: none; }

.report h3 {
  margin: 0 0 6px;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}
.report h3 .badge {
  font-size: 11px;
  font-weight: 600;
  padding: 1px 7px;
  border-radius: 999px;
  background: #eaf1ff;
  color: var(--accent);
}
.report .note {
  color: var(--muted);
  font-size: 12px;
  margin: 4px 0 8px;
}
.report table {
  width: 100%;
  border-collapse: collapse;
  font-size: 12.5px;
}
.report th, .report td {
  text-align: left;
  padding: 5px 8px;
  border-bottom: 1px solid #eef2f7;
}
.report th { color: var(--muted); font-weight: 500; width: 33%; }
.report td { font-variant-numeric: tabular-nums; }
.report td.num { font-family: ui-monospace, Consolas, monospace; }
.report .warn { color: var(--mark); }
.report .kv { display: flex; flex-wrap: wrap; gap: 8px; margin: 6px 0; }
.report .kv span {
  background: #f5f8fd;
  border: 1px solid #e8eef8;
  border-radius: 7px;
  padding: 3px 9px;
  font-size: 12px;
}
.report code {
  background: #f5f8fd;
  border-radius: 5px;
  padding: 1px 5px;
  font-size: 12px;
}

@media (max-width: 960px) {
  .wrap { grid-template-columns: 1fr; }
  .canvas { min-height: 320px; }
}