:root {
  --color-bg: #f7f5f0;
  --color-surface: #ffffff;
  --color-text: #1a1f2b;
  --color-text-muted: #4a5266;
  --color-navy: #142645;
  --color-navy-dark: #0b1730;
  --color-red: #a8192e;
  --color-red-dark: #7e1122;
  --color-gold: #ab7d1f;
  --color-border: #d9d4c8;
  --color-focus: #0b57d0;
  --radius: 10px;
  --max-width: 960px;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1.5;
}

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

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-navy);
  color: #fff;
  padding: 0.75rem 1.25rem;
  z-index: 100;
  border-radius: 0 0 var(--radius) 0;
}

.skip-link:focus {
  left: 0;
}

*:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
}

header.site-header {
  background: var(--color-navy);
  color: #fff;
  border-bottom: 4px solid var(--color-red);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  text-decoration: none;
}

.brand small {
  font-size: 0.65rem;
  font-weight: 400;
  color: #c9d2e6;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

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

nav.main-nav a,
nav.main-nav button.link-like {
  color: #e8ecf6;
  text-decoration: none;
  font: inherit;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem 0;
}

nav.main-nav a:hover,
nav.main-nav button.link-like:hover {
  text-decoration: underline;
}

main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2rem 1.25rem 4rem;
}

.hero {
  text-align: center;
  padding: 2.5rem 1rem 1rem;
}

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  color: var(--color-navy);
  margin-bottom: 0.5rem;
}

.hero p.lead {
  color: var(--color-text-muted);
  max-width: 640px;
  margin: 0 auto 1.5rem;
  font-size: 1.05rem;
}

.tag-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
  margin: 1rem 0 2rem;
}

.tag-strip span {
  background: #eef1f8;
  border: 1px solid var(--color-border);
  color: var(--color-navy);
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  font-size: 0.85rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: 0 1px 3px rgba(20, 38, 69, 0.08);
}

.card + .card {
  margin-top: 1.5rem;
}

.auth-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
  max-width: 460px;
  margin: 0 auto;
}

fieldset {
  border: none;
  padding: 0;
  margin: 0;
}

legend {
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-navy);
  margin-bottom: 0.75rem;
  padding: 0;
}

.field {
  margin-bottom: 1rem;
}

.field label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.field input,
.field select {
  width: 100%;
  padding: 0.6rem 0.7rem;
  border: 1px solid #9aa3b5;
  border-radius: 6px;
  font-size: 1rem;
  background: #fff;
  color: var(--color-text);
}

.field .hint {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-top: 0.25rem;
}

.field .error {
  color: var(--color-red-dark);
  font-size: 0.9rem;
  margin-top: 0.35rem;
  font-weight: 600;
}

.btn {
  display: inline-block;
  border: none;
  border-radius: 999px;
  padding: 0.7rem 1.4rem;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  text-align: center;
}

.btn-primary {
  background: var(--color-red);
  color: #fff;
}

.btn-primary:hover {
  background: var(--color-red-dark);
}

.btn-secondary {
  background: #fff;
  color: var(--color-navy);
  border: 2px solid var(--color-navy);
}

.btn-secondary:hover {
  background: #eef1f8;
}

.btn-block {
  display: block;
  width: 100%;
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.radio-group label {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-weight: 500;
  background: #f4f6fb;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 0.6rem 0.8rem;
  cursor: pointer;
}

.radio-group input {
  margin-top: 0.2rem;
}

.radio-group .level-desc {
  display: block;
  font-weight: 400;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.question-card {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
  background: var(--color-surface);
}

.question-card h3 {
  margin-top: 0;
  color: var(--color-navy);
}

.question-card .topic-label {
  display: inline-block;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-gold);
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.options-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.options-list li label {
  display: flex;
  gap: 0.6rem;
  align-items: flex-start;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  cursor: pointer;
}

.options-list li label:hover {
  border-color: var(--color-navy);
}

.options-list li.correct label {
  border-color: #1f7a3d;
  background: #eaf7ee;
}

.options-list li.incorrect label {
  border-color: var(--color-red);
  background: #fbeaec;
}

.quiz-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1.5rem;
}

.quiz-meta .pill {
  background: #eef1f8;
  border-radius: 999px;
  padding: 0.35rem 0.9rem;
  font-size: 0.85rem;
  color: var(--color-navy);
  border: 1px solid var(--color-border);
}

.export-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.5rem 0;
  padding: 1.25rem;
  background: #eef1f8;
  border-radius: var(--radius);
}

.status-region {
  min-height: 1.5rem;
  font-weight: 600;
}

.status-region[data-kind="error"] {
  color: var(--color-red-dark);
}

.status-region[data-kind="success"] {
  color: #1f7a3d;
}

footer.site-footer {
  border-top: 1px solid var(--color-border);
  margin-top: 3rem;
  padding: 2rem 1.25rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

footer .footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.roadmap-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.roadmap-grid .card h3 {
  color: var(--color-navy);
  margin-top: 0;
}

.step-list {
  counter-reset: step;
  list-style: none;
  padding: 0;
  margin: 0;
}

.step-list li {
  counter-increment: step;
  position: relative;
  padding-left: 2.75rem;
  margin-bottom: 1.25rem;
}

.step-list li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 2rem;
  height: 2rem;
  border-radius: 50%;
  background: var(--color-navy);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

@media (prefers-reduced-motion: no-preference) {
  .btn,
  .options-list li label {
    transition: background-color 0.15s ease, border-color 0.15s ease;
  }
}