:root {
  --ink: #17211C;
  --ink-2: #4A5651;
  --ink-3: #8A948F;
  --bg: #F6F5F1;
  --card: #FFFFFF;
  --line: rgba(23, 33, 28, 0.10);
  --line-strong: rgba(23, 33, 28, 0.18);
  --accent: #A8502A;
  --accent-soft: rgba(168, 80, 42, 0.09);
  --ok: #2E7D5B;
  --ok-soft: rgba(46, 125, 91, 0.10);
  --warn: #96690C;
  --warn-soft: rgba(150, 105, 12, 0.10);
  --danger: #C4362F;
  --danger-soft: rgba(196, 54, 47, 0.10);
  --shadow: 0 1px 2px rgba(23, 33, 28, 0.05), 0 8px 24px -12px rgba(23, 33, 28, 0.14);
  --radius: 14px;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

[data-theme="dark"] {
  --ink: #E9E7E2;
  --ink-2: #A8B0AC;
  --ink-3: #6E7873;
  --bg: #12151A;
  --card: #1A1E23;
  --line: rgba(233, 231, 226, 0.10);
  --line-strong: rgba(233, 231, 226, 0.20);
  --accent: #D9805A;
  --accent-soft: rgba(217, 128, 90, 0.12);
  --ok: #5FBE91;
  --ok-soft: rgba(95, 190, 145, 0.12);
  --warn: #D8A73F;
  --warn-soft: rgba(216, 167, 63, 0.12);
  --danger: #E5736C;
  --danger-soft: rgba(229, 115, 108, 0.12);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 12px 32px -16px rgba(0, 0, 0, 0.6);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--ink);
  font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 15px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  transition: background 0.25s ease, color 0.25s ease;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; font-size: inherit; cursor: pointer; border: none; background: none; color: inherit; }
textarea, input { font-family: inherit; font-size: inherit; color: inherit; }

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* ---------- header ---------- */
.site-head {
  position: sticky; top: 0; z-index: 50;
  background: var(--bg);
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.head-inner {
  display: flex; align-items: center; gap: 28px;
  height: 62px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 600; letter-spacing: -0.01em; white-space: nowrap; }
.brand-mark {
  width: 26px; height: 26px; border-radius: 7px;
  background: var(--ink); color: var(--bg);
  display: grid; place-items: center;
  font-size: 13px; font-weight: 700; letter-spacing: 0;
  font-family: var(--mono);
}
.brand small { display: block; font-size: 11px; font-weight: 400; color: var(--ink-3); letter-spacing: 0.02em; line-height: 1.2; margin-top: -2px; }

.nav { display: flex; gap: 4px; margin-left: 8px; }
.nav a {
  padding: 7px 13px; border-radius: 8px; font-size: 14px; color: var(--ink-2);
  transition: background 0.18s, color 0.18s;
}
.nav a:hover { background: var(--accent-soft); color: var(--ink); }
.nav a.on { background: var(--ink); color: var(--bg); }

.head-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.icon-btn {
  width: 36px; height: 36px; border-radius: 9px; display: grid; place-items: center;
  border: 1px solid var(--line); color: var(--ink-2);
  transition: border-color 0.18s, color 0.18s, background 0.18s;
}
.icon-btn:hover { border-color: var(--line-strong); color: var(--ink); background: var(--card); }
.icon-btn svg { width: 17px; height: 17px; }

/* ---------- hero ---------- */
.hero { padding: 46px 0 26px; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 7px;
  font-size: 12px; letter-spacing: 0.06em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 500; margin-bottom: 14px;
  font-family: var(--mono);
}
.eyebrow::before { content: ""; width: 18px; height: 1px; background: var(--ink-3); }
h1 { font-size: 33px; line-height: 1.28; letter-spacing: -0.025em; font-weight: 600; }
h1 em { font-style: normal; color: var(--accent); }
.lede { margin-top: 12px; color: var(--ink-2); font-size: 15px; max-width: 620px; }

/* ---------- controls ---------- */
.seg {
  display: inline-flex; gap: 2px; padding: 3px; border-radius: 11px;
  background: var(--card); border: 1px solid var(--line);
  overflow-x: auto; max-width: 100%;
}
.seg button {
  padding: 7px 14px; border-radius: 8px; font-size: 13.5px; color: var(--ink-2);
  white-space: nowrap; transition: background 0.16s, color 0.16s;
}
.seg button:hover { color: var(--ink); }
.seg button.on { background: var(--ink); color: var(--bg); font-weight: 500; }

/* ---------- editor ---------- */
.workbench {
  display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 20px;
  align-items: start; padding-bottom: 40px;
}
.panel {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow);
}
.panel-head {
  display: flex; align-items: center; gap: 12px;
  padding: 14px 18px; border-bottom: 1px solid var(--line);
}
.panel-title { font-size: 13px; font-weight: 500; color: var(--ink-2); letter-spacing: 0.02em; }
.panel-tools { margin-left: auto; display: flex; gap: 6px; }

#editor {
  width: 100%; min-height: 300px; padding: 20px;
  border: none; outline: none; resize: vertical;
  background: transparent; font-size: 15px; line-height: 1.85;
  display: block;
}
#editor::placeholder { color: var(--ink-3); }

.editor-foot {
  display: flex; align-items: center; gap: 14px;
  padding: 11px 18px; border-top: 1px solid var(--line);
  font-size: 12.5px; color: var(--ink-3); font-family: var(--mono);
}
.editor-foot .grow { margin-left: auto; }
.link-btn { color: var(--accent); font-size: 12.5px; font-family: var(--mono); }
.link-btn:hover { text-decoration: underline; text-underline-offset: 3px; }

/* preview */
.preview-body {
  padding: 20px; min-height: 300px; font-size: 15px; line-height: 1.95;
  white-space: pre-wrap; word-break: break-word;
}
.preview-empty { color: var(--ink-3); font-size: 14px; }

mark {
  padding: 1px 2px; border-radius: 3px; color: inherit;
  cursor: pointer; transition: box-shadow 0.15s;
}
mark.high { background: var(--danger-soft); box-shadow: inset 0 -2px 0 var(--danger); }
mark.medium { background: var(--warn-soft); box-shadow: inset 0 -2px 0 var(--warn); }
mark.low { background: var(--ok-soft); box-shadow: inset 0 -2px 0 var(--ok); }
mark:hover { box-shadow: inset 0 -2px 0 currentColor, 0 0 0 2px var(--accent-soft); }
mark.active { outline: 2px solid var(--accent); outline-offset: 1px; }

/* ---------- score ---------- */
.score-panel { padding: 20px 18px; display: flex; align-items: center; gap: 18px; border-bottom: 1px solid var(--line); }
.gauge { position: relative; width: 88px; height: 88px; flex: 0 0 88px; }
.gauge svg { transform: rotate(-90deg); display: block; }
.gauge-num {
  position: absolute; inset: 0; display: grid; place-items: center;
  font-size: 24px; font-weight: 600; font-family: var(--mono); letter-spacing: -0.03em;
}
.score-meta h3 { font-size: 16px; font-weight: 600; letter-spacing: -0.01em; }
.score-meta p { font-size: 13px; color: var(--ink-2); margin-top: 3px; }
.score-meta .cnt { font-family: var(--mono); color: var(--ink); font-weight: 500; }

/* ---------- hit list ---------- */
.hits { max-height: 520px; overflow-y: auto; padding: 8px; }
.hit {
  display: flex; gap: 11px; padding: 12px; border-radius: 10px;
  cursor: pointer; transition: background 0.15s;
}
.hit:hover, .hit.active { background: var(--accent-soft); }
.hit-bar { width: 3px; border-radius: 2px; flex: 0 0 3px; }
.hit-bar.high { background: var(--danger); }
.hit-bar.medium { background: var(--warn); }
.hit-bar.low { background: var(--ok); }
.hit-main { flex: 1; min-width: 0; }
.hit-top { display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap; }
.hit-word { font-weight: 600; letter-spacing: 0.01em; }
.hit-tag {
  font-size: 11px; padding: 1px 6px; border-radius: 4px;
  font-family: var(--mono); letter-spacing: 0.02em;
}
.hit-tag.high { color: var(--danger); background: var(--danger-soft); }
.hit-tag.medium { color: var(--warn); background: var(--warn-soft); }
.hit-tag.low { color: var(--ok); background: var(--ok-soft); }
.hit-tag.cat { color: var(--ink-3); background: var(--bg); border: 1px solid var(--line); }
.hit-why { font-size: 13px; color: var(--ink-2); margin-top: 5px; line-height: 1.6; }
.hit-fix { font-size: 12.5px; color: var(--ok); margin-top: 6px; }
.hit-fix b { font-weight: 500; color: var(--ink-3); font-size: 11px; letter-spacing: 0.06em; text-transform: uppercase; margin-right: 5px; }

.empty-state { padding: 44px 20px; text-align: center; color: var(--ink-3); font-size: 14px; }

/* ---------- category chips ---------- */
.chips { display: flex; flex-wrap: wrap; gap: 7px; padding: 14px 18px; border-top: 1px solid var(--line); }
.chip {
  font-size: 12.5px; padding: 4px 10px; border-radius: 20px;
  border: 1px solid var(--line); color: var(--ink-2); background: transparent;
  transition: all 0.16s;
}
.chip:hover { border-color: var(--line-strong); color: var(--ink); }
.chip .n { font-family: var(--mono); color: var(--ink-3); margin-left: 4px; }
.chip.on { background: var(--ink); color: var(--bg); border-color: var(--ink); }
.chip.on .n { color: var(--bg); opacity: 0.6; }

/* ---------- generic cards / tables ---------- */
.section { padding: 34px 0; }
.section-head { margin-bottom: 20px; }
.section-head h2 { font-size: 21px; font-weight: 600; letter-spacing: -0.02em; }
.section-head p { font-size: 14px; color: var(--ink-2); margin-top: 5px; }

.grid { display: grid; gap: 14px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.note {
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 18px; background: var(--card);
}
.note h4 { font-size: 14.5px; font-weight: 600; margin-bottom: 7px; letter-spacing: -0.01em; }
.note p { font-size: 13.5px; color: var(--ink-2); line-height: 1.7; }
.note .idx { font-family: var(--mono); font-size: 11px; color: var(--ink-3); letter-spacing: 0.08em; display: block; margin-bottom: 9px; }

table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { padding: 11px 12px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-weight: 500; color: var(--ink-3); font-size: 12px; letter-spacing: 0.05em; text-transform: uppercase; font-family: var(--mono); }
tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--accent-soft); }

/* ---------- footer ---------- */
.site-foot {
  border-top: 1px solid var(--line); padding: 30px 0 44px;
  color: var(--ink-3); font-size: 12.5px;
}
.foot-inner { display: flex; gap: 20px; flex-wrap: wrap; align-items: center; }
.foot-inner .grow { margin-left: auto; }

/* ---------- toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 34px; transform: translate(-50%, 20px);
  background: var(--ink); color: var(--bg); padding: 10px 18px; border-radius: 10px;
  font-size: 13.5px; opacity: 0; pointer-events: none;
  transition: opacity 0.22s, transform 0.22s; z-index: 100;
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- responsive ---------- */
@media (max-width: 940px) {
  .workbench { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  h1 { font-size: 26px; }
  .nav { overflow-x: auto; }
  .head-inner { gap: 14px; }
  .brand small { display: none; }
  .hits { max-height: none; }
}
@media (max-width: 620px) {
  .wrap { padding: 0 16px; }
  .nav a { padding: 6px 10px; font-size: 13px; }
  h1 { font-size: 23px; }
  .hero { padding: 32px 0 20px; }
  #editor { min-height: 220px; padding: 16px; }
  .score-panel { padding: 16px; }
}