:root {
  --fg: #1a1a1a;
  --bg: #ffffff;
  --accent: #0b5fff;
  --border: #4a4a4a;
  --error: #b00020;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, "Apple SD Gothic Neo", "Malgun Gothic", sans-serif;
  font-size: 1.15rem;
  line-height: 1.7;
  color: var(--fg);
  background: var(--bg);
}

/* 키보드 사용자를 위한 본문 바로가기 링크 */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 0.75rem 1rem;
  z-index: 100;
}
.skip-link:focus {
  left: 0;
}

header,
main,
footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 1rem 1.25rem;
}

header {
  border-bottom: 2px solid var(--border);
}

nav ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin: 0;
  padding: 0;
}

a {
  color: var(--accent);
}

h1 {
  font-size: 1.8rem;
}
h2 {
  font-size: 1.4rem;
  margin-top: 2rem;
}

/* 뚜렷한 포커스 표시 — 색에만 의존하지 않음 */
a:focus,
button:focus,
input:focus,
textarea:focus {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.field {
  margin: 1rem 0;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.35rem;
}

input[type="password"],
textarea {
  width: 100%;
  font-size: 1.1rem;
  padding: 0.6rem;
  border: 2px solid var(--border);
  border-radius: 4px;
}

fieldset.check-item {
  border: 2px solid var(--border);
  border-radius: 6px;
  margin: 1rem 0;
  padding: 0.75rem 1rem;
}

legend {
  font-weight: 600;
  padding: 0 0.4rem;
}

.radio-row {
  display: flex;
  gap: 2rem;
}

.radio-option {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.radio-option input[type="radio"] {
  width: 1.4rem;
  height: 1.4rem;
}

.radio-option label {
  display: inline;
  font-weight: 400;
  margin: 0;
}

button {
  font-size: 1.15rem;
  padding: 0.7rem 1.6rem;
  background: var(--accent);
  color: #fff;
  border: 2px solid var(--accent);
  border-radius: 6px;
  cursor: pointer;
  margin-top: 1.5rem;
}

button:hover {
  background: #084ad1;
}

.status-message {
  min-height: 1.7rem;
  font-weight: 700;
  color: #0a7d28;
}

.error {
  color: var(--error);
  font-weight: 700;
}

.history-list,
.record-list {
  margin: 1rem 0;
}

.record-list dt {
  font-weight: 600;
  margin-top: 1rem;
}
.record-list dd {
  margin: 0.25rem 0 0;
  padding-left: 1rem;
  border-left: 3px solid var(--border);
}