:root {
  --ink: #0c1d28;
  --muted: #5b6b74;
  --line: #dfe6e9;
  --surface: #f5f8f9;
  --blue: #1769d1;
  --green: #0f8f78;
}

* { box-sizing: border-box; }

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

.top {
  background: var(--ink);
  color: #fff;
  padding: 16px 24px;
  letter-spacing: .05em;
}
.top span { color: #9fb1ba; margin-left: 8px; }

main {
  max-width: 720px;
  margin: 32px auto;
  padding: 0 20px;
  display: grid;
  gap: 20px;
}

.intro h1 { margin: 0 0 8px; font-size: 1.9rem; }
.intro p { color: var(--muted); margin: 0 0 16px; }
.intro nav { display: flex; flex-wrap: wrap; gap: 8px; }
.intro nav a {
  text-decoration: none;
  color: var(--ink);
  background: #fff;
  border: 1px solid var(--line);
  padding: 8px 12px;
  border-radius: 999px;
  font-size: .9rem;
  font-weight: 600;
}

.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 24px;
  scroll-margin-top: 16px;
}
.card h2 { margin: 0 0 12px; font-size: 1.25rem; }
.card p { color: var(--muted); margin: 8px 0; }

textarea, input[type="text"], input[type="number"], select {
  width: 100%;
  font: inherit;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: #fff;
  margin-top: 8px;
}
textarea[readonly], input[readonly] { background: var(--surface); }

label { display: block; font-weight: 600; margin-top: 12px; }
fieldset { border: 1px solid var(--line); border-radius: 10px; margin: 16px 0; padding: 12px 16px; }
legend { font-weight: 700; padding: 0 6px; }
fieldset label { font-weight: 500; margin: 6px 0; }
fieldset input { margin-right: 8px; }

.row { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }

button {
  font: inherit;
  font-weight: 700;
  padding: 10px 16px;
  border: 0;
  border-radius: 10px;
  background: var(--blue);
  color: #fff;
  cursor: pointer;
}
button.ghost {
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--line);
}
button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid #4c9aff;
  outline-offset: 2px;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 16px 0 0;
}
.stats div {
  background: var(--surface);
  border-radius: 12px;
  padding: 12px;
}
.stats dt { font-size: .8rem; color: var(--muted); }
.stats dd { margin: 4px 0 0; font-size: 1.3rem; font-weight: 700; }

.grid2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.note { font-size: .88rem; }

.foot {
  text-align: center;
  padding: 32px 20px 48px;
}
.foot a { color: var(--muted); font-size: .9rem; }

@media (max-width: 560px) {
  .stats { grid-template-columns: repeat(2, 1fr); }
  .grid2 { grid-template-columns: 1fr; }
}