:root {
  color-scheme: light;
  --surface: rgba(255, 255, 255, 0.92);
  --surface-strong: #fcfbf8;
  --ink: #1e232b;
  --muted: #5a6472;
  --line: #d6d6dd;
  --accent: #5c4331;
  --accent-strong: #3e2b1e;
  --accent-soft: #f4ece3;
  --shadow: 0 24px 52px rgba(30, 35, 43, 0.1);
  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Manrope", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(115, 87, 62, 0.12), transparent 24%),
    radial-gradient(circle at top right, rgba(74, 95, 123, 0.1), transparent 24%),
    linear-gradient(180deg, #f6f3ee 0%, #fbfaf7 42%, #fffefb 100%);
}

a,
button,
input,
select,
textarea {
  font: inherit;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 20;
  padding: 0.75rem 1rem;
  border-radius: 999px;
  background: var(--accent-strong);
  color: #fff;
}

.skip-link:focus {
  top: 1rem;
}

:focus-visible {
  outline: 3px solid rgba(92, 67, 49, 0.25);
  outline-offset: 3px;
}

.shell {
  width: min(1140px, calc(100% - 2rem));
  margin: 0 auto;
}

.site-header {
  padding: 2rem 0 1.5rem;
}

.hero {
  display: grid;
  grid-template-columns: 1.45fr 0.95fr;
  gap: 1.25rem;
  align-items: end;
}

.eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--accent);
}

h1,
h2,
h3 {
  margin: 0;
  font-family: "Fraunces", serif;
  line-height: 1.08;
}

h1 {
  font-size: clamp(2.3rem, 4.4vw, 4.6rem);
}

h2 {
  font-size: clamp(1.55rem, 2.5vw, 2.2rem);
}

h3 {
  font-size: 1.15rem;
}

.lede,
.section-heading p,
.hero-note,
.status-text {
  color: var(--muted);
}

.lede {
  max-width: 60ch;
  font-size: 1.05rem;
  line-height: 1.78;
}

.hero-card,
.panel {
  border: 1px solid rgba(214, 214, 221, 0.92);
  background: var(--surface);
  backdrop-filter: blur(12px);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 1.5rem;
  border-radius: var(--radius-xl);
  background:
    linear-gradient(180deg, rgba(255, 252, 247, 0.98), rgba(244, 236, 227, 0.95)),
    var(--surface-strong);
}

.hero-label {
  margin: 0;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero-value {
  margin: 0.55rem 0 0.3rem;
  font-size: 2rem;
}

.lesson-layout {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 1.5rem;
  padding-bottom: 3rem;
}

.lesson-aside {
  position: sticky;
  top: 1rem;
  align-self: start;
}

.toc {
  display: grid;
  gap: 0.45rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.72);
}

.toc a {
  padding: 0.7rem 0.85rem;
  border-radius: 12px;
  color: var(--ink);
  text-decoration: none;
  font-weight: 700;
}

.toc a:hover,
.toc a:focus-visible {
  background: var(--accent-soft);
}

.lesson-main,
.stack {
  display: grid;
  gap: 1rem;
}

.panel {
  padding: 1.35rem;
  border-radius: var(--radius-xl);
}

.section-heading {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 1rem;
}

.grid.two-col,
.text-grid,
.toolkit-grid {
  display: grid;
  gap: 1rem;
}

.grid.two-col {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.text-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.toolkit-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.field {
  display: grid;
  gap: 0.45rem;
}

.field span {
  font-weight: 700;
}

input,
select,
textarea {
  width: 100%;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: #fff;
  color: var(--ink);
}

textarea {
  resize: vertical;
  line-height: 1.7;
}

.text-card,
.info-card,
.writing-box,
.task-row {
  display: grid;
  gap: 0.6rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: linear-gradient(180deg, #fffefc, #f8f5ef);
}

.text-meta {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.quote {
  margin: 0;
  padding: 0.9rem 1rem;
  border-left: 4px solid var(--accent);
  background: rgba(244, 236, 227, 0.8);
  font-style: italic;
}

.mini-list,
.info-list {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.4rem;
}

.source-link {
  color: var(--accent-strong);
  font-weight: 800;
  text-decoration: underline;
}

.word-bank {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: 1rem;
}

.word-bank span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.2rem;
  padding: 0.4rem 0.72rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-weight: 700;
}

.button,
.action-row button {
  border: none;
  border-radius: 999px;
  padding: 0.9rem 1.25rem;
  font-weight: 800;
  cursor: pointer;
}

.button-primary {
  background: linear-gradient(180deg, var(--accent), var(--accent-strong));
  color: #fff;
}

.button-secondary {
  background: linear-gradient(180deg, #fff, #f2f0eb);
  color: var(--ink);
}

.action-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.feedback {
  margin: 0;
  font-size: 0.96rem;
  line-height: 1.6;
}

.task-row.correct,
.field.correct,
.text-card.correct {
  border-color: #9fd0b0;
  background: linear-gradient(180deg, #fbfffc, #f0faf3);
}

.task-row.incorrect,
.field.incorrect,
.text-card.incorrect {
  border-color: #e4c08f;
  background: linear-gradient(180deg, #fffefb, #fff6ea);
}

.results-card {
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.9);
}

.status-text {
  margin: 0.5rem 0 0;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 980px) {
  .hero,
  .lesson-layout,
  .text-grid,
  .toolkit-grid {
    grid-template-columns: 1fr;
  }

  .lesson-aside {
    position: static;
  }
}

@media (max-width: 720px) {
  .shell {
    width: min(100% - 1rem, 1140px);
  }

  .grid.two-col {
    grid-template-columns: 1fr;
  }

  .panel,
  .hero-card {
    padding: 1.1rem;
  }
}