:root {
  --navy: #0a2540;
  --navy-dark: #071a2e;
  --orange: #e86a17;
  --ink: #1c2b3a;
  --muted: #5a6b7c;
  --line: #d8e0e8;
  --bg: #f5f7fa;
  --card: #ffffff;
  --good: #1e7d46;
  --warn-bg: #fdf3e3;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
}

header.site {
  background: var(--navy);
  color: #fff;
  padding: 28px 20px 24px;
}
header.site .wrap { max-width: 960px; margin: 0 auto; }
header.site .brand {
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #f0b285;
  margin: 0 0 6px;
}
header.site h1 { margin: 0; font-size: 30px; font-weight: 700; }
header.site p.sub { margin: 8px 0 0; color: #c9d6e2; max-width: 640px; }
header.site .rule { height: 4px; background: var(--orange); margin-top: 20px; }

main { max-width: 960px; margin: 0 auto; padding: 24px 20px 48px; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px 22px;
  margin-bottom: 20px;
}
.card h2 { margin: 0 0 10px; font-size: 20px; color: var(--navy); }
.card h3 { margin: 18px 0 8px; font-size: 16px; color: var(--navy); }
.card p { margin: 8px 0; }
.muted { color: var(--muted); }
.small { font-size: 13px; }

.badge {
  display: inline-block;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 2px 8px;
  border-radius: 3px;
  vertical-align: middle;
}
.badge.demo { background: var(--navy); color: #fff; }
.badge.flag { background: var(--warn-bg); color: #8a5a00; border: 1px solid #e3b959; }
.badge.lock { background: #eef2f6; color: var(--muted); border: 1px solid var(--line); }

.forming {
  border-left: 4px solid var(--orange);
  background: var(--warn-bg);
  padding: 12px 16px;
  margin: 12px 0;
}
.forming strong { color: var(--navy); }

.progress {
  height: 10px;
  background: #e7edf2;
  border-radius: 5px;
  overflow: hidden;
  margin-top: 8px;
}
.progress > div { height: 100%; background: var(--orange); }

label { display: block; font-weight: 600; font-size: 14px; margin: 12px 0 4px; }
label .hint { display: block; font-weight: 400; color: var(--muted); font-size: 12.5px; }
input[type="text"], input[type="number"], input[type="password"], select, textarea {
  width: 100%;
  padding: 9px 10px;
  border: 1px solid var(--line);
  border-radius: 5px;
  font-size: 15px;
  background: #fff;
  color: var(--ink);
}
.checkbox { display: flex; gap: 8px; align-items: flex-start; font-weight: 400; }
.checkbox input { margin-top: 4px; width: auto; }

button, .button {
  display: inline-block;
  background: var(--orange);
  color: #fff;
  border: none;
  border-radius: 5px;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}
button.secondary, .button.secondary {
  background: #fff;
  color: var(--navy);
  border: 1px solid var(--navy);
}
button:disabled { opacity: 0.55; cursor: default; }
.btnrow { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 14px; }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 0 18px; }
@media (max-width: 640px) { .grid2 { grid-template-columns: 1fr; } }

.card h4 { margin: 20px 0 6px; font-size: 15px; color: var(--navy); }

.tablewrap { overflow-x: auto; margin-top: 10px; }
table.inputs { border-collapse: collapse; min-width: 860px; width: 100%; font-size: 13.5px; }
table.inputs th, table.inputs td {
  text-align: left;
  padding: 6px 6px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
table.inputs th { color: var(--navy); font-size: 12px; text-transform: uppercase; letter-spacing: 0.03em; }
table.inputs td.mlabel { font-weight: 600; white-space: nowrap; padding-top: 14px; }
table.inputs input[type="number"] { padding: 7px 8px; font-size: 14px; }

table.results { width: 100%; border-collapse: collapse; margin-top: 10px; font-size: 14.5px; }
table.results th, table.results td {
  text-align: left;
  padding: 8px 8px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}
table.results th { color: var(--navy); font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; }
table.results td.num { font-variant-numeric: tabular-nums; white-space: nowrap; }

.interp {
  border-left: 4px solid var(--navy);
  background: #eef3f8;
  padding: 12px 16px;
  margin-top: 14px;
}
.interp .fix { font-weight: 700; color: var(--navy); }

.error { color: #b3261e; }
.success { color: var(--good); }
.hidden { display: none; }

ol.defs, ul.plain { padding-left: 20px; }
ol.defs li { margin-bottom: 12px; }
ol.defs .dname { font-weight: 700; color: var(--navy); }

footer.site {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  padding: 18px 20px 30px;
}
footer.site .wrap { max-width: 960px; margin: 0 auto; }
a { color: var(--navy); }