:root {
  --bg: #f3f5f7;
  --paper: #ffffff;
  --ink: #1c2430;
  --muted: #5c6b7a;
  --line: #e1e7ee;
  --accent: #1f4b73;
  --accent-ink: #ffffff;
  --warn: #8a5a12;
  --warn-bg: #fff6e8;
  --bad: #8d2f2f;
  --bad-bg: #fdecec;
  --ok: #1d6b45;
  --ok-bg: #e8f6ee;
  --info-bg: #eef4fa;
}

* { box-sizing: border-box; }

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

.top {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 0.85rem 1.5rem;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.brand {
  color: var(--accent);
  font-weight: 650;
  text-decoration: none;
  letter-spacing: 0.01em;
}

nav { display: flex; gap: 0.9rem; flex-wrap: wrap; }
nav a { color: var(--ink); text-decoration: none; }
nav a:hover { color: var(--accent); }

.who { margin-left: auto; color: var(--muted); font-size: 0.92rem; }

.wrap { max-width: 42rem; margin: 0 auto; padding: 1.5rem 1.25rem 3rem; }
.wrap.wide { max-width: 64rem; }

h1 { font-size: 1.6rem; font-weight: 650; margin: 0 0 0.75rem; }
h2 { font-size: 1.1rem; margin: 1.6rem 0 0.6rem; }

.lead, .hint { color: var(--muted); }
.lead { margin-top: 0; }

form { display: grid; gap: 0.75rem; margin: 0.6rem 0 1rem; }
label { display: grid; gap: 0.25rem; font-size: 0.92rem; }
input, select, textarea {
  font: inherit;
  padding: 0.55rem 0.65rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  color: var(--ink);
}
textarea { resize: vertical; }
.check { display: flex; align-items: center; gap: 0.5rem; }
.check input { width: auto; }

button {
  font: inherit;
  border: 0;
  border-radius: 6px;
  padding: 0.55rem 0.9rem;
  background: var(--accent);
  color: var(--accent-ink);
  cursor: pointer;
  width: fit-content;
}
button.ghost { background: transparent; color: var(--accent); border: 1px solid var(--line); }
button:disabled { opacity: 0.45; cursor: not-allowed; }

.alert { padding: 0.7rem 0.8rem; border-radius: 6px; }
.alert.info { background: var(--info-bg); }
.alert.ok { background: var(--ok-bg); color: var(--ok); }
.alert.warn { background: var(--warn-bg); color: var(--warn); }
.alert.bad { background: var(--bad-bg); color: var(--bad); }

.facts { display: grid; gap: 0.55rem; margin: 1rem 0; }
.facts div { display: grid; grid-template-columns: 9rem 1fr; gap: 0.5rem; }
.facts dt { color: var(--muted); }
.facts dd { margin: 0; }

table { width: 100%; border-collapse: collapse; background: var(--paper); }
th, td { text-align: left; padding: 0.5rem 0.6rem; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 0.85rem; }
td form { margin: 0; }

.card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 1rem 1rem 0.4rem;
  margin: 0.8rem 0;
}
.row { display: flex; flex-wrap: wrap; gap: 0.6rem; align-items: end; }
.row label { min-width: 10rem; }
.links a { color: var(--accent); }
code { font-size: 0.85rem; word-break: break-all; }
.plain { padding-left: 1.1rem; }
.foot { color: var(--muted); text-align: center; padding: 1rem; font-size: 0.85rem; }

@media (max-width: 720px) {
  .who { margin-left: 0; }
  .top { flex-wrap: wrap; }
  .facts div { grid-template-columns: 1fr; }
}