:root {
  color-scheme: light;
  --bg: #f4f6fb;
  --card: #ffffff;
  --accent: #3a7bfd;
  --text: #1c2333;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
}

header {
  background: var(--card);
  border-bottom: 1px solid #e3e8f2;
  padding: 12px 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}

header h1 { font-size: 20px; margin: 0; color: var(--accent); }

nav { display: flex; gap: 16px; align-items: center; }
nav a { color: var(--text); text-decoration: none; }
nav a:hover { color: var(--accent); }

main { max-width: 760px; margin: 32px auto; padding: 0 16px; }

.card {
  background: var(--card);
  border: 1px solid #e3e8f2;
  border-radius: 10px;
  padding: 20px;
  margin: 16px 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

label { display: flex; flex-direction: column; gap: 4px; font-size: 14px; }

input, select {
  padding: 8px 10px;
  border: 1px solid #c9d2e3;
  border-radius: 6px;
  font-size: 14px;
}

button, .button {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 6px;
  padding: 9px 16px;
  font-size: 14px;
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
}

form.inline { display: inline; }
form.inline button { background: none; color: var(--text); padding: 0; }
form.inline button:hover { color: var(--accent); }

.error { color: #c0392b; }
.empty { color: #6b7488; font-style: italic; }
ul { padding-left: 20px; }
li { margin: 6px 0; }

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card);
  border: 1px solid #e3e8f2;
  border-radius: 10px;
  margin: 16px 0;
}

th, td {
  text-align: left;
  padding: 8px 12px;
  border-bottom: 1px solid #e3e8f2;
  font-size: 14px;
}

th { color: #6b7488; font-weight: 600; }

fieldset {
  border: 1px solid #e3e8f2;
  border-radius: 8px;
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

legend { font-size: 14px; color: #6b7488; padding: 0 6px; }

.row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 8px;
}

.family-row {
  padding: 10px 0;
  border-top: 1px solid #e3e8f2;
}

.row-caption {
  grid-column: 1 / -1;
  color: #59657b;
  font-size: 13px;
  font-weight: 600;
}

.button-secondary {
  align-self: flex-start;
  background: #e8efff;
  color: #174a9e;
}

.family-row[hidden], [data-add-row][hidden] { display: none; }

form.search {
  flex-direction: row;
  align-items: flex-end;
  flex-wrap: wrap;
}

@media (max-width: 640px) {
  header { flex-direction: column; align-items: flex-start; gap: 8px; }
  nav { flex-wrap: wrap; gap: 10px; }
  main { margin: 16px auto; }
  .row { grid-template-columns: 1fr; }
  table { display: block; overflow-x: auto; }
}