/* Golden River Stone LLC — learn.css
   Course and article layer. Uses the tokens defined in site.css; adds nothing new to the palette. */

/* ---------- Shared page frame ---------- */
.page-head {
  padding-block: var(--space-5) var(--space-4);
  border-bottom: 1px solid var(--border);
}

.breadcrumb {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 var(--space-2);
  padding: 0;
  font-size: 0.85rem;
  color: var(--text-faint);
}

.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 600;
}

.breadcrumb a:hover {
  color: var(--gold-bright);
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 0.5rem;
  color: var(--text-faint);
}

.page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-3);
  margin: var(--space-2) 0 0;
  padding: 0;
  list-style: none;
  font-size: 0.88rem;
  color: var(--text-faint);
}

.page-meta li {
  display: inline-flex;
  align-items: center;
  gap: 0.45em;
}

.page-meta strong {
  color: var(--text-muted);
  font-weight: 600;
}

/* ---------- Course index cards ---------- */
.track-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.track-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  display: flex;
  flex-direction: column;
}

.track-card h2,
.track-card h3 {
  font-size: 1.3rem;
}

.track-card .btn-row {
  margin-top: auto;
  padding-top: var(--space-2);
}

.track-flag {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: var(--space-1);
}

/* ---------- Syllabus ---------- */
.syllabus {
  list-style: none;
  counter-reset: lesson -1;
  margin: var(--space-4) 0 0;
  padding: 0;
  border-top: 1px solid var(--border);
}

.syllabus li {
  counter-increment: lesson;
  border-bottom: 1px solid var(--border);
}

.syllabus a,
.syllabus .soon {
  display: grid;
  grid-template-columns: 3.2rem 1fr;
  gap: var(--space-2);
  align-items: baseline;
  padding: var(--space-3) var(--space-1);
  text-decoration: none;
  color: var(--text);
}

.syllabus a:hover {
  background: rgba(201, 163, 90, 0.05);
  color: var(--text);
}

.syllabus a::before,
.syllabus .soon::before {
  content: counter(lesson, decimal-leading-zero);
  font-variant-numeric: tabular-nums;
  font-weight: 800;
  font-size: 0.95rem;
  color: var(--gold);
}

.syllabus .soon {
  color: var(--text-faint);
}

.syllabus .soon::before {
  color: var(--text-faint);
}

.syllabus h3 {
  margin: 0 0 0.25rem;
  font-size: 1.08rem;
  font-weight: 700;
}

.syllabus p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--text-muted);
  max-width: 70ch;
}

.syllabus .soon h3::after {
  content: "In writing";
  margin-left: 0.75em;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 700;
  color: var(--text-faint);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  padding: 0.15em 0.6em;
  vertical-align: 0.15em;
  white-space: nowrap;
}

/* ---------- Lesson layout ---------- */
.lesson-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: var(--space-5);
  align-items: start;
  padding-block: var(--space-4) var(--space-5);
}

.lesson-body {
  min-width: 0;
  font-size: 1.03rem;
}

.lesson-body h2 {
  font-size: clamp(1.35rem, 1.4vw + 1rem, 1.75rem);
  margin-top: var(--space-4);
  scroll-margin-top: 5.5rem;
}

.lesson-body h3 {
  font-size: 1.12rem;
  margin-top: var(--space-3);
  color: var(--text);
  scroll-margin-top: 5.5rem;
}

.lesson-body p,
.lesson-body li {
  color: var(--text-muted);
}

.lesson-body p {
  max-width: 68ch;
}

.lesson-body strong {
  color: var(--text);
  font-weight: 700;
}

.lesson-body ul,
.lesson-body ol {
  max-width: 68ch;
  padding-left: 1.25rem;
  margin: 0 0 var(--space-2);
}

.lesson-body li {
  margin-bottom: 0.5rem;
}

.lesson-body ol > li::marker {
  color: var(--gold);
  font-weight: 700;
}

.lesson-goal {
  border-left: 3px solid var(--gold);
  padding: 0.2rem 0 0.2rem var(--space-2);
  margin-bottom: var(--space-3);
}

.lesson-goal p {
  color: var(--text);
  font-size: 1.1rem;
  margin-bottom: 0;
}

/* ---------- Table of contents ---------- */
.toc {
  position: sticky;
  top: 5.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  padding: var(--space-2) var(--space-2) var(--space-2) 0;
}

.toc p {
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin: 0 0 0.5rem var(--space-2);
}

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

.toc li {
  margin: 0;
}

.toc a {
  display: block;
  padding: 0.4rem var(--space-2);
  border-left: 2px solid transparent;
  font-size: 0.9rem;
  line-height: 1.35;
  color: var(--text-muted);
  text-decoration: none;
}

.toc a:hover {
  color: var(--gold-bright);
  border-left-color: var(--gold-line);
}

/* ---------- Callouts ---------- */
.callout {
  border: 1px solid var(--border);
  border-left: 3px solid var(--gold-line);
  background: var(--bg-elevated);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  margin: var(--space-3) 0;
  max-width: 68ch;
}

.callout > :last-child {
  margin-bottom: 0;
}

.callout-label {
  display: block;
  font-size: 0.74rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.4rem;
}

.callout.warn {
  border-left-color: #d08a5a;
}

.callout.warn .callout-label {
  color: #e0a276;
}

/* ---------- "What you'll need" panel ---------- */
.need-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  margin: var(--space-3) 0;
  max-width: 68ch;
}

.need-panel h3 {
  margin-top: 0;
}

.need-panel dl {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(7rem, auto) 1fr;
  gap: 0.5rem var(--space-2);
}

.need-panel dt {
  font-weight: 700;
  color: var(--gold);
  font-size: 0.9rem;
}

.need-panel dd {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.95rem;
}

/* ---------- Tables ---------- */
.table-wrap {
  overflow-x: auto;
  margin: var(--space-3) 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
}

table.data {
  border-collapse: collapse;
  width: 100%;
  min-width: 520px;
  font-size: 0.93rem;
}

table.data caption {
  caption-side: bottom;
  text-align: left;
  padding: var(--space-2);
  font-size: 0.85rem;
  color: var(--text-faint);
}

table.data th,
table.data td {
  padding: 0.7rem var(--space-2);
  text-align: left;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}

table.data thead th {
  background: var(--bg-elevated);
  color: var(--text);
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
}

table.data tbody th {
  color: var(--text);
  font-weight: 600;
}

table.data td {
  color: var(--text-muted);
}

table.data tbody tr:last-child th,
table.data tbody tr:last-child td {
  border-bottom: 0;
}

/* ---------- Figures ---------- */
.figure {
  margin: var(--space-4) 0;
  max-width: 68ch;
}

.figure-scroll {
  overflow-x: auto;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg-elevated);
  -webkit-overflow-scrolling: touch;
}

.figure svg {
  display: block;
  width: 100%;
  min-width: 600px;
  height: auto;
}

.figure figcaption {
  font-size: 0.86rem;
  color: var(--text-faint);
  margin-top: 0.6rem;
}

/* ---------- Checklist ---------- */
.lesson-checklist {
  background: var(--bg-card);
  border: 1px solid var(--gold-line);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  margin: var(--space-4) 0;
  max-width: 68ch;
}

.lesson-checklist h2 {
  margin-top: 0;
  font-size: 1.25rem;
}

.lesson-checklist ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.lesson-checklist li {
  position: relative;
  padding-left: 2rem;
  margin-bottom: 0.65rem;
}

.lesson-checklist li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.15em;
  width: 1.15rem;
  height: 1.15rem;
  border: 1.5px solid var(--gold-line);
  border-radius: 4px;
}

/* ---------- Early access block ---------- */
.early-access {
  border: 1px solid var(--gold-line);
  background: linear-gradient(180deg, rgba(201, 163, 90, 0.10), rgba(201, 163, 90, 0.02));
  border-radius: var(--radius-md);
  padding: var(--space-3);
  margin: var(--space-4) 0;
  max-width: 68ch;
}

.early-access h2 {
  margin-top: 0;
  font-size: 1.2rem;
}

.early-access p {
  color: var(--text-muted);
}

/* ---------- Sources ---------- */
.sources {
  margin: var(--space-4) 0 0;
  padding-top: var(--space-3);
  border-top: 1px solid var(--border);
  max-width: 68ch;
}

.sources h2 {
  font-size: 1.1rem;
  margin-top: 0;
}

.sources ol {
  font-size: 0.9rem;
  padding-left: 1.2rem;
}

.sources li {
  margin-bottom: 0.55rem;
  overflow-wrap: anywhere;
}

.sources .checked {
  color: var(--text-faint);
}

/* ---------- Disclaimer ---------- */
.disclaimer {
  margin-top: var(--space-4);
  padding: var(--space-2) var(--space-3);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  color: var(--text-faint);
  max-width: 68ch;
}

.disclaimer p {
  color: inherit;
  font-size: inherit;
  margin: 0;
}

/* ---------- Prev / next ---------- */
.lesson-nav {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-2);
  margin-top: var(--space-4);
  max-width: 68ch;
}

.lesson-nav a {
  display: block;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-2);
  text-decoration: none;
  background: var(--bg-card);
}

.lesson-nav a:hover {
  border-color: var(--gold-line);
}

.lesson-nav span {
  display: block;
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.lesson-nav strong {
  color: var(--text);
  font-weight: 700;
  line-height: 1.3;
}

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .lesson-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--space-3);
  }

  .toc {
    position: static;
    order: -1;
    padding-right: var(--space-1);
  }
}

@media (max-width: 640px) {
  .syllabus a,
  .syllabus .soon {
    grid-template-columns: 2.4rem 1fr;
    padding-block: var(--space-2);
  }

  .need-panel dl {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }

  .need-panel dd {
    margin-bottom: 0.5rem;
  }
}