* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  background: radial-gradient(circle at top, #f5f7ff, #eef1f7 55%, #e9edf5);
  color: #1b1d26;
}

.container {
  max-width: 760px;
  margin: 48px auto 64px;
  padding: 0 20px;
}

.top-nav {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}

.top-nav a {
  text-decoration: none;
  color: #2f54eb;
  background: #eef2ff;
  border: 1px solid #d7e0ff;
  border-radius: 999px;
  padding: 8px 12px;
  font-size: 14px;
  font-weight: 600;
}

.top-nav a[aria-current="page"] {
  background: #2f54eb;
  border-color: #2f54eb;
  color: #fff;
}

.header h1 {
  margin: 0 0 6px;
  font-size: 36px;
  letter-spacing: -0.5px;
}

.header p {
  margin: 0;
  color: #5c6370;
}

.disclaimer {
  margin-top: 20px;
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid rgba(203, 145, 47, 0.45);
  background: rgba(255, 248, 235, 0.95);
  color: #3d3424;
  font-size: 14px;
  line-height: 1.5;
}

.disclaimer p {
  margin: 0;
}

.disclaimer strong {
  color: #2a2418;
}

.card {
  background: #fff;
  border: 1px solid rgba(210, 216, 230, 0.7);
  border-radius: 16px;
  padding: 24px;
  margin-top: 18px;
  box-shadow: 0 16px 40px rgba(22, 24, 35, 0.08);
}

.form {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.field {
  display: grid;
  gap: 8px;
}

.field span {
  font-weight: 600;
  color: #2f3442;
}

input,
select,
button {
  font-size: 16px;
  padding: 12px 14px;
  border-radius: 10px;
  border: 1px solid #cdd3e0;
  background-color: #fdfdff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

input:focus,
select:focus {
  border-color: #2f54eb;
  box-shadow: 0 0 0 3px rgba(47, 84, 235, 0.15);
  outline: none;
}

.button {
  background: linear-gradient(135deg, #2f54eb, #4f80ff);
  color: #fff;
  border: none;
  cursor: pointer;
  font-weight: 600;
  letter-spacing: 0.2px;
  box-shadow: 0 10px 20px rgba(47, 84, 235, 0.25);
}

.button:hover {
  filter: brightness(1.02);
}

.button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.status {
  color: #5c6370;
}

.result {
  display: grid;
  gap: 12px;
  margin-top: 12px;
}

.result-disclaimer {
  margin: 0;
  padding: 10px 12px;
  border-radius: 10px;
  background: #f7f8fc;
  border: 1px solid #e1e5ef;
  font-size: 13px;
  color: #4a5160;
  line-height: 1.45;
}

.result-row {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 10px;
  align-items: start;
}

.label {
  font-weight: 600;
  color: #2f3442;
}

.value {
  color: #111;
}

.raw summary {
  cursor: pointer;
}

.raw pre {
  background: #f5f6fb;
  border-radius: 10px;
  padding: 14px;
  overflow: auto;
  border: 1px solid #e1e5ef;
}

.site-footer {
  margin-top: 28px;
  padding-top: 8px;
  font-size: 13px;
  line-height: 1.55;
  color: #5c6370;
}

.site-footer p {
  margin: 0 0 12px;
}

.site-footer p:last-child {
  margin-bottom: 0;
}

.site-footer strong {
  color: #3a4050;
}

.education h2 {
  margin: 0;
  font-size: 22px;
}

.education p {
  margin: 8px 0 0;
  color: #4a5160;
}

.education .education-source {
  margin: 12px 0 0;
  font-size: 14px;
  color: #5a6270;
  line-height: 1.55;
}

.education-list {
  margin: 14px 0 0;
  padding-left: 20px;
  color: #2b3140;
  line-height: 1.6;
}

.topic-grid {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

.topic-item {
  border: 1px solid #e1e5ef;
  border-radius: 12px;
  background: #fafbff;
  padding: 16px;
}

.topic-item h3 {
  margin: 0;
  font-size: 18px;
  color: #1f2430;
}

.topic-item p {
  margin: 8px 0 0;
}

.topic-button {
  display: inline-block;
  margin-top: 12px;
  text-decoration: none;
  font-size: 14px;
  padding: 10px 12px;
}