:root {
  --accent: #2a6f4e;
  --accent-dark: #1d5238;
  --ink: #1f2a26;
  --muted: #5a6b64;
  --paper: #f5f7f6;
  --card: #ffffff;
  --line: #d7e0dc;
  --error: #b3261e;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Hiragino Kaku Gothic ProN", "Noto Sans JP", "Yu Gothic", system-ui, sans-serif;
  line-height: 1.7;
}

.site-header {
  background: var(--accent);
  color: #fff;
  padding: 1.5rem 1rem 1.25rem;
}

.site-header .brand {
  margin: 0;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  font-weight: 700;
}

.site-header .brand-sub {
  margin-left: 0.5em;
  font-size: 0.8rem;
  font-weight: 400;
  opacity: 0.85;
}

.site-header h1 {
  margin: 0.25rem 0 0.25rem;
  font-size: 1.4rem;
}

.site-header .lead {
  margin: 0;
  font-size: 0.9rem;
  opacity: 0.95;
}

.site-header nav {
  margin-top: 0.5rem;
  font-size: 0.9rem;
}

.site-header nav a {
  color: #fff;
}

main {
  max-width: 44rem;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

fieldset {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  margin: 0 0 1rem;
  padding: 0.75rem 1rem 1rem;
}

legend {
  font-weight: 700;
  padding: 0 0.4em;
}

.hint {
  margin: 0.1rem 0 0.5rem;
  font-size: 0.85rem;
  color: var(--muted);
}

fieldset label {
  display: inline-block;
  margin-right: 1.25rem;
  cursor: pointer;
}

.inline-label input {
  width: 6em;
  padding: 0.35em 0.5em;
  font-size: 1rem;
  border: 1px solid var(--line);
  border-radius: 6px;
  margin-right: 0.5em;
}

input[type="radio"], input[type="checkbox"] {
  margin-right: 0.35em;
  accent-color: var(--accent);
}

.form-error {
  background: #fdeceb;
  border: 1px solid var(--error);
  border-radius: 8px;
  color: var(--error);
  margin: 0 0 1rem;
  padding: 0.75rem 1rem 0.75rem 2rem;
  font-size: 0.9rem;
}

.actions {
  margin: 1.25rem 0;
}

#submit-button {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 8px;
  font-size: 1.05rem;
  padding: 0.7em 2.2em;
  cursor: pointer;
}

#submit-button:hover {
  background: var(--accent-dark);
}

.result {
  background: var(--card);
  border: 2px solid var(--accent);
  border-radius: 8px;
  padding: 1rem 1.25rem;
}

.result h2 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
  color: var(--accent-dark);
}

.result dl {
  margin: 0;
}

.result-row {
  display: flex;
  gap: 1rem;
  padding: 0.4rem 0;
  border-top: 1px solid var(--line);
}

.result-row dt {
  flex: 0 0 11em;
  color: var(--muted);
}

.result-row dd {
  margin: 0;
  font-weight: 700;
}

.site-footer {
  max-width: 44rem;
  margin: 0 auto;
  padding: 0 1rem 2rem;
  font-size: 0.8rem;
  color: var(--muted);
}