:root {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --ink: #1f2933;
  --muted: #66727f;
  --line: #dce1e6;
  --brand: #1f6feb;
  --brand-d: #1657c0;
  --ok: #1a7f4b;
  --ok-bg: #e6f4ea;
  --fail: #c0392b;
  --fail-bg: #fdecea;
  --accent: #f5a623;
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
  font-size: 15px;
}
a { color: var(--brand); text-decoration: none; }

/* Top bar */
.topbar {
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 18px;
  position: sticky;
  top: 0;
  z-index: 50;
  flex-wrap: wrap;
}
.topbar .brand { font-weight: 700; font-size: 16px; color: var(--brand-d); margin-right: auto; }
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  padding: 7px 12px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 14px;
  transition: .15s;
}
.btn:hover { border-color: var(--brand); color: var(--brand); }
.btn.primary { background: var(--brand); color: #fff; border-color: var(--brand); }
.btn.primary:hover { background: var(--brand-d); color: #fff; }
select.lang {
  border: 1px solid var(--line); border-radius: 6px; padding: 7px 10px;
  background: var(--panel); color: var(--ink); font-size: 14px; cursor: pointer;
}

/* Layout */
.wrap { max-width: 1100px; margin: 0 auto; padding: 22px 18px 60px; }
.hero { text-align: center; margin: 18px 0 30px; }
.hero h1 { margin: 0 0 6px; font-size: 26px; color: var(--ink); }
.hero p { margin: 0; color: var(--muted); }
.grid {
  display: grid; gap: 16px;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}
.card {
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px;
  padding: 18px; box-shadow: var(--shadow); cursor: pointer; transition: .15s;
  display: flex; flex-direction: column; gap: 8px;
}
.card:hover { border-color: var(--brand); transform: translateY(-2px); }
.card .ico { font-size: 26px; }
.card h3 { margin: 0; font-size: 16px; }
.card p { margin: 0; color: var(--muted); font-size: 13px; }

/* Module pages */
.crumbs { color: var(--muted); font-size: 13px; margin-bottom: 14px; }
.crumbs a { color: var(--brand); }
.page h2 { margin: 0 0 4px; font-size: 22px; }
.page .sub { color: var(--muted); margin: 0 0 20px; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 20px; box-shadow: var(--shadow); margin-bottom: 18px; }
.panel h3 { margin: 0 0 14px; font-size: 16px; border-left: 3px solid var(--brand); padding-left: 10px; }
.form-grid { display: grid; gap: 14px; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.field label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 5px; }
.field input, .field select {
  width: 100%; padding: 9px 10px; border: 1px solid var(--line);
  border-radius: 6px; font-size: 14px; color: var(--ink); background: #fff;
}
.field input:focus, .field select:focus { outline: none; border-color: var(--brand); }
.field .hint { font-size: 12px; color: var(--muted); margin-top: 4px; }
.actions { display: flex; gap: 10px; margin-top: 16px; flex-wrap: wrap; }
.result-table { width: 100%; border-collapse: collapse; margin-top: 6px; }
.result-table td, .result-table th { border: 1px solid var(--line); padding: 8px 10px; text-align: left; font-size: 14px; }
.result-table th { background: #f7f9fb; color: var(--muted); font-weight: 600; }
.result-table td.val { font-family: "SF Mono", Consolas, monospace; font-weight: 600; }
.badge { display: inline-block; padding: 3px 10px; border-radius: 20px; font-size: 13px; font-weight: 700; }
.badge.ok { background: var(--ok-bg); color: var(--ok); }
.badge.fail { background: var(--fail-bg); color: var(--fail); }
.note { background: #fff8e6; border: 1px solid #f0dca0; border-radius: 8px; padding: 12px 14px; font-size: 13px; color: #7a5b00; margin-top: 14px; }
.disclaimer { font-size: 12px; color: var(--muted); border-top: 1px dashed var(--line); margin-top: 30px; padding-top: 14px; }

/* data tables */
table.data { width: 100%; border-collapse: collapse; font-size: 13px; }
table.data th, table.data td { border: 1px solid var(--line); padding: 7px 9px; text-align: left; }
table.data thead th { background: #f7f9fb; position: sticky; top: 0; }
table.data tbody tr:nth-child(even) { background: #fafbfc; }
.scrollbox { max-height: 460px; overflow: auto; border: 1px solid var(--line); border-radius: 8px; }
.searchbar { display: flex; gap: 10px; margin-bottom: 12px; flex-wrap: wrap; align-items: center; }
.searchbar input { flex: 1; min-width: 200px; padding: 9px 10px; border: 1px solid var(--line); border-radius: 6px; }
.searchbar select { padding: 9px 10px; border: 1px solid var(--line); border-radius: 6px; }
.tabs { display: flex; gap: 8px; margin-bottom: 16px; flex-wrap: wrap; }
.tab { padding: 8px 14px; border: 1px solid var(--line); border-radius: 20px; cursor: pointer; font-size: 14px; background: #fff; }
.tab.active { background: var(--brand); color: #fff; border-color: var(--brand); }
.footer { text-align: center; color: var(--muted); font-size: 12px; margin-top: 30px; }
.chk { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--muted); margin: 4px 0 14px; cursor: pointer; user-select: none; }
.chk input { width: auto; }
.unitbtn { border: 1px solid var(--line); background: var(--panel); border-radius: 6px; padding: 6px 10px; font-size: 13px; cursor: pointer; color: var(--ink); }
.unitbtn:hover { border-color: var(--brand); color: var(--brand); }
.radar { max-width: 100%; height: auto; background: #fff; border: 1px solid var(--line); border-radius: 8px; }
.pick { cursor: pointer; }
.pick.sel { outline: 2px solid var(--brand); background: #eef4ff; }
.cmpbar { display:flex; gap:10px; flex-wrap:wrap; align-items:center; margin: 6px 0 14px; }
@media (max-width: 540px) { .hero h1 { font-size: 22px; } .topbar .brand { width: 100%; margin-right: 0; } .form-grid { grid-template-columns: 1fr 1fr; } .actions { flex-direction: column; } .actions .btn { width: 100%; } }

/* Dark theme (toggle via MatCalcChrome) */
[data-theme="dark"] {
  --bg: #0f141a;
  --panel: #1a212b;
  --ink: #e6edf3;
  --muted: #9aa7b4;
  --line: #2b3542;
  --brand: #4c9bff;
  --brand-d: #2f7fe0;
  --ok: #4cc38a;
  --ok-bg: #143020;
  --fail: #ff6b6b;
  --fail-bg: #3a1c1c;
  --accent: #f5a623;
  --shadow: 0 1px 3px rgba(0,0,0,.45), 0 1px 2px rgba(0,0,0,.35);
}
[data-theme="dark"] body { background: var(--bg); color: var(--ink); }
[data-theme="dark"] a { color: var(--brand); }
[data-theme="dark"] .topbar { background: var(--panel); }
[data-theme="dark"] .note { background: #2a2410; border-color: #5a4d1f; color: #e8d28a; }
[data-theme="dark"] .result-table th,
[data-theme="dark"] table.data thead th { background: #202834; color: var(--muted); }
[data-theme="dark"] table.data tbody tr:nth-child(even) { background: #161d26; }
[data-theme="dark"] .pick.sel { background: #16304f; }
[data-theme="dark"] .field input,
[data-theme="dark"] .field select,
[data-theme="dark"] select.lang { background: #11171f; color: var(--ink); }
[data-theme="dark"] .radar { background: #11171f; }
[data-theme="dark"] .card { background: var(--panel); }
[data-theme="dark"] .disclaimer { color: var(--muted); }

/* number step wrapper (mobile steppers injected by chrome.js) */
.numwrap { display: flex; align-items: center; gap: 4px; }
.numwrap input { flex: 1; min-width: 0; }
.stepbtn { width: 30px; padding: 6px 0; border: 1px solid var(--line); background: var(--panel); color: var(--ink); border-radius: 6px; cursor: pointer; font-size: 12px; flex: 0 0 auto; }
.stepbtn:hover { border-color: var(--brand); }