@import url('https://fonts.googleapis.com/css2?family=IM+Fell+English&family=Playfair+Display:wght@400;600&display=swap');

:root {
  font-family: 'Playfair Display', 'Didot', 'Times New Roman', serif;
  line-height: 1.75;
  color: #050505;
  background-color: #fff;
  --ink: #050505;
  --soft-ink: #262626;
  --muted: #595959;
  --paper: #ffffff;
  --rule: #050505;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #fff;
  background-image: repeating-linear-gradient(0deg, transparent, transparent 23px, rgba(0, 0, 0, 0.04) 24px);
  font-family: 'IM Fell English', 'Playfair Display', 'Times New Roman', serif;
  color: var(--ink);
}

.site-nav {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.35rem 1.5rem 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 4px double var(--rule);
}

.site-nav .brand a {
  text-decoration: none;
  color: var(--ink);
  font-weight: 600;
  font-size: 1.4rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-variant: small-caps;
}

.site-nav .nav-links {
  display: flex;
  gap: 1.2rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.site-nav .nav-links a {
  text-decoration: none;
  color: var(--ink);
  font-weight: 600;
}

.site-nav .nav-links a:hover {
  text-decoration: underline double;
}

.app-shell {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem 3rem;
  background: var(--paper);
  box-shadow: 0 0 0 2px var(--rule);
}

.hero {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
  background: var(--paper);
  padding: 2.5rem;
  border: 2px solid var(--rule);
  border-top: 6px double var(--rule);
  border-bottom: 6px double var(--rule);
}

.hero h1 {
  margin-top: 0.2rem;
  margin-bottom: 0.6rem;
  font-size: clamp(2rem, 5vw, 2.8rem);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.72rem;
  color: var(--muted);
  margin: 0;
}

.lede {
  margin-top: 0;
  color: var(--soft-ink);
  text-align: justify;
  text-indent: 1.75rem;
}

.lede::first-letter {
  font-size: 3rem;
  float: left;
  line-height: 0.9;
  padding-right: 0.35rem;
  font-family: 'Playfair Display', 'Times New Roman', serif;
  text-transform: uppercase;
}

.session-card {
  margin-left: auto;
  background: var(--paper);
  border: 2px solid var(--rule);
  border-top: 4px double var(--rule);
  padding: 1rem 1.25rem;
  min-width: 220px;
}

.session-title {
  margin-top: 0;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.session-card ul {
  margin: 0;
  padding-left: 1.1rem;
  font-family: 'IM Fell English', 'Times New Roman', serif;
}

.lesson-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 2rem 0 1.5rem;
}

.lesson-nav button {
  border: 2px solid var(--rule);
  background: transparent;
  border-radius: 0;
  padding: 0.45rem 0.9rem;
  font-size: 0.95rem;
  cursor: pointer;
  font-family: 'IM Fell English', 'Times New Roman', serif;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.lesson-nav button.active {
  background: var(--ink);
  color: #fff;
}

.lesson {
  background: var(--paper);
  border: 2px solid var(--rule);
  border-top: 6px double var(--rule);
  padding: 2rem;
}

.lesson h2 {
  margin-top: 0;
}

.badge {
  display: inline-block;
  border: 1px solid var(--rule);
  padding: 0.15rem 0.7rem;
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-variant: small-caps;
}

.rule-list,
.examples-list,
.practice-list {
  background: transparent;
  border: 1px solid var(--rule);
  padding: 1rem 1.25rem;
}

.rule-list li,
.examples-list li,
.practice-list li {
  margin-bottom: 0.3rem;
}

.practice-item {
  margin-bottom: 1rem;
}

.practice-item input,
.practice-item textarea,
.quiz-item input,
.quiz-item textarea {
  width: 100%;
  max-width: 420px;
  padding: 0.45rem 0.6rem;
  border-radius: 0;
  border: 1px solid var(--rule);
  font-size: 0.95rem;
  margin-top: 0.35rem;
  font-family: 'IM Fell English', 'Times New Roman', serif;
  background: rgba(0, 0, 0, 0.015);
}

.practice-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  margin-top: 0.4rem;
}

.practice-actions button {
  border-radius: 0;
  border: 2px solid var(--rule);
  background: #fff;
  color: var(--ink);
  padding: 0.35rem 1.1rem;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-variant: small-caps;
}

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

.choice-group {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  margin-top: 0.3rem;
}

.choice-option {
  display: flex;
  gap: 0.35rem;
  align-items: center;
  font-size: 0.95rem;
}

.feedback {
  font-weight: 600;
  margin: 0.4rem 0 0;
}

.feedback.success {
  color: #14532d;
}

.feedback.error {
  color: #7f1d1d;
}

.grade {
  margin-top: 1rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--soft-ink);
}

.grade.complete {
  border-top: 1px solid var(--rule);
  padding-top: 0.5rem;
}

.sample-answer {
  display: none;
  margin: 0.2rem 0 0;
  font-size: 0.9rem;
  background: #f4f4f4;
  padding: 0.4rem 0.6rem;
  border: 1px solid var(--rule);
}

.section-title {
  margin-bottom: 0.2rem;
  color: #0f172a;
}

.parent-tip {
  font-style: italic;
  color: var(--muted);
  margin-top: 0.4rem;
}

.story {
  border: 1px solid var(--rule);
  background: rgba(0, 0, 0, 0.03);
  padding: 1rem 1.25rem;
}

.story h3 {
  margin-top: 0;
}

.teaching-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
  margin: 1rem 0 1.5rem;
}

.teaching-card {
  background: var(--paper);
  border: 1px solid var(--rule);
  padding: 1rem 1.25rem;
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0.05);
}

.teaching-card h4 {
  margin: 0 0 0.4rem;
}

.teaching-card ul {
  padding-left: 1.1rem;
  margin: 0;
}

.table-wrapper {
  overflow-x: auto;
  margin-bottom: 1.5rem;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

th,
td {
  border: 1px solid var(--rule);
  padding: 0.65rem 0.8rem;
  text-align: left;
}

th {
  background: rgba(0, 0, 0, 0.05);
  text-transform: uppercase;
}

.quiz-card {
  border: 1px solid var(--rule);
  padding: 1.25rem;
  margin-top: 1rem;
  background: var(--paper);
}

.quiz-card h3 {
  margin-top: 0;
}

.quiz-list {
  list-style: decimal;
  padding-left: 1.25rem;
  margin-bottom: 0;
}

.quiz-item {
  margin-bottom: 1rem;
}

.quiz-reminder {
  font-size: 0.85rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.wrap-up,
.install {
  margin-top: 2rem;
  background: var(--paper);
  border: 2px solid var(--rule);
  border-top: 6px double var(--rule);
  padding: 1.5rem 2rem;
}

ol {
  padding-left: 1.25rem;
}

code {
  background: rgba(0, 0, 0, 0.08);
  padding: 0 0.2rem;
}

@media (max-width: 640px) {
  .lesson,
  .hero,
  .wrap-up,
  .install {
    padding: 1.25rem;
  }

  .lesson-nav {
    flex-direction: column;
  }

  .lesson-nav button {
    width: 100%;
  }
}