/**
 * TradeChefPro - Learn / Options Education page
 * Respects the existing light/dark theme variables from theme.css
 */

/* ── Hero ───────────────────────────────────────────────────────────────── */
.tcp-learn-hero {
  background: var(--t-bg-alt);
  border-bottom: 1px solid var(--t-border);
  padding: 3rem 0 2.25rem;
  margin-bottom: 0;
}

.tcp-learn-hero__inner {
  max-width: 720px;
}

.tcp-learn-hero__tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--t-brand);
  background: rgba(253, 137, 23, 0.10);
  border-radius: var(--radius-pill);
  padding: 0.25rem 0.75rem;
  margin-bottom: 0.875rem;
}

.tcp-learn-hero__title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--t-text-strong);
  line-height: 1.15;
  margin-bottom: 0.75rem;
}

.tcp-learn-hero__lead {
  font-size: 1.05rem;
  color: var(--t-text);
  max-width: 600px;
  margin-bottom: 1.5rem;
  line-height: 1.65;
}

.tcp-learn-hero__jump-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tcp-learn-hero__jump {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--t-text);
  background: var(--t-bg-surface);
  border: 1px solid var(--t-border-med);
  border-radius: var(--radius-pill);
  padding: 0.3rem 0.85rem;
  text-decoration: none;
  transition: border-color 0.15s, color 0.15s;
}

.tcp-learn-hero__jump:hover {
  border-color: var(--t-brand);
  color: var(--t-brand);
  text-decoration: none;
}

/* ── Layout (sidebar + main) ────────────────────────────────────────────── */
.tcp-learn-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 3rem;
  align-items: start;
  padding: 2.5rem 0 4rem;
}

@media (max-width: 900px) {
  .tcp-learn-layout {
    grid-template-columns: 1fr;
    gap: 0;
  }
}

/* ── TOC sidebar ────────────────────────────────────────────────────────── */
.tcp-learn-toc {
  position: sticky;
  top: 72px;
  max-height: calc(100vh - 90px);
  overflow-y: auto;
}

@media (max-width: 900px) {
  .tcp-learn-toc {
    display: none;
  }
}

.tcp-learn-toc__label {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--t-text-muted);
  margin-bottom: 0.625rem;
}

.tcp-learn-toc nav {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-left: 2px solid var(--t-border);
  padding-left: 0.875rem;
  margin-bottom: 1.5rem;
}

.tcp-learn-toc__link {
  font-size: 0.82rem;
  color: var(--t-text-muted);
  text-decoration: none;
  padding: 0.22rem 0;
  line-height: 1.4;
  transition: color 0.15s;
}

.tcp-learn-toc__link:hover {
  color: var(--t-brand);
  text-decoration: none;
}

.tcp-learn-toc__link--sub {
  font-size: 0.75rem;
  padding-left: 0.75rem;
  color: var(--t-text-faint);
}

.tcp-learn-toc__link--sub:hover {
  color: var(--t-brand);
}

.tcp-learn-toc__cta {
  border: 1px solid var(--t-border-med);
  border-radius: var(--radius-lg);
  padding: 0.875rem 1rem;
  background: var(--t-bg-alt);
}

.tcp-learn-toc__cta p {
  font-size: 0.78rem;
  color: var(--t-text-muted);
  margin-bottom: 0.625rem;
}

/* ── Section base ───────────────────────────────────────────────────────── */
.tcp-learn-section {
  padding-bottom: 3rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--t-border);
  scroll-margin-top: 80px;
}

.tcp-learn-section:last-of-type {
  border-bottom: none;
}

.tcp-learn-section__title {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--t-text-strong);
  margin-bottom: 1rem;
  margin-top: 0;
  scroll-margin-top: 80px;
}

.tcp-learn-section__sub {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--t-text-strong);
  margin-top: 2rem;
  margin-bottom: 0.75rem;
  scroll-margin-top: 80px;
}

.tcp-learn-main p {
  line-height: 1.7;
  color: var(--t-text);
}

/* ── Info cards ─────────────────────────────────────────────────────────── */
.tcp-learn-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
  margin: 1.25rem 0 1.5rem;
}

.tcp-learn-card {
  background: var(--t-bg-surface);
  border: 1px solid var(--t-border);
  border-radius: var(--radius-lg);
  padding: 1.125rem 1.125rem 1rem;
}

.tcp-learn-card--green { border-top: 3px solid var(--t-green); }
.tcp-learn-card--red   { border-top: 3px solid var(--t-red); }

.tcp-learn-card__icon {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
  line-height: 1;
}

.tcp-learn-card__title {
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--t-text-strong);
  margin-bottom: 0.4rem;
}

.tcp-learn-card__body {
  font-size: 0.82rem;
  color: var(--t-text-muted);
  line-height: 1.5;
  margin: 0;
}

/* ── Calls vs puts compare ──────────────────────────────────────────────── */
.tcp-learn-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 1.25rem 0 1.5rem;
}

@media (max-width: 640px) {
  .tcp-learn-compare { grid-template-columns: 1fr; }
}

.tcp-learn-compare__col {
  border-radius: var(--radius-lg);
  padding: 1.125rem;
  border: 1px solid var(--t-border);
  background: var(--t-bg-surface);
}

.tcp-learn-compare__col--bull { border-top: 3px solid var(--t-green); }
.tcp-learn-compare__col--bear { border-top: 3px solid var(--t-red); }
.tcp-learn-compare__col--green { border-top: 3px solid var(--t-green); }
.tcp-learn-compare__col--amber { border-top: 3px solid var(--t-amber); }

.tcp-learn-compare__label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--t-text-muted);
  margin-bottom: 0.625rem;
}

.tcp-learn-compare__col p {
  font-size: 0.875rem;
  margin-bottom: 0.75rem;
}

.tcp-learn-compare__example {
  font-size: 0.78rem;
  color: var(--t-text-muted);
  background: var(--t-bg-subtle);
  border-radius: var(--radius-md);
  padding: 0.5rem 0.75rem;
  font-family: 'DM Mono', monospace;
  line-height: 1.5;
}

/* ── Formula display ────────────────────────────────────────────────────── */
.tcp-learn-formula {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.625rem;
  margin: 1.25rem 0 1.5rem;
  padding: 1.125rem 1.25rem;
  background: var(--t-bg-alt);
  border-radius: var(--radius-lg);
  border: 1px solid var(--t-border);
}

.tcp-learn-formula__part {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--t-text-strong);
  background: var(--t-bg-surface);
  border: 1px solid var(--t-border-med);
  border-radius: var(--radius-md);
  padding: 0.375rem 0.875rem;
}

.tcp-learn-formula__op {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--t-text-muted);
}

.tcp-learn-formula__result {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--t-brand);
  background: rgba(253, 137, 23, 0.08);
  border: 1px solid rgba(253, 137, 23, 0.25);
  border-radius: var(--radius-md);
  padding: 0.375rem 0.875rem;
}

/* ── List ───────────────────────────────────────────────────────────────── */
.tcp-learn-list {
  padding-left: 1.25rem;
  margin: 0.75rem 0 1rem;
}

.tcp-learn-list li {
  font-size: 0.9rem;
  color: var(--t-text);
  line-height: 1.65;
  margin-bottom: 0.5rem;
}

/* ── Callouts ───────────────────────────────────────────────────────────── */
.tcp-learn-callout {
  border-radius: var(--radius-md);
  padding: 0.875rem 1rem;
  font-size: 0.85rem;
  line-height: 1.6;
  margin: 1.25rem 0;
}

.tcp-learn-callout--info {
  background: rgba(6, 139, 234, 0.08);
  border-left: 3px solid var(--t-accent);
  color: var(--t-text);
}

.tcp-learn-callout--amber {
  background: var(--t-amber-bg);
  border-left: 3px solid var(--t-amber);
  color: var(--t-text);
}

.tcp-learn-callout--brand {
  background: rgba(253, 137, 23, 0.08);
  border-left: 3px solid var(--t-brand);
  color: var(--t-text);
}

.tcp-learn-callout__link {
  display: inline-block;
  margin-top: 0.4rem;
  font-weight: 600;
  color: var(--t-brand);
}

/* ── Greek cards ────────────────────────────────────────────────────────── */
.tcp-learn-greek {
  background: var(--t-bg-surface);
  border: 1px solid var(--t-border);
  border-radius: var(--radius-lg);
  padding: 1.375rem 1.375rem 1.25rem;
  margin-bottom: 1.25rem;
}

.tcp-learn-greek__header {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-bottom: 0.875rem;
  flex-wrap: wrap;
}

.tcp-learn-greek__symbol {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--t-brand);
  font-family: 'DM Serif Display', serif;
  line-height: 1;
  min-width: 1.75rem;
}

.tcp-learn-greek__name {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--t-text-strong);
  margin: 0;
}

.tcp-learn-greek__tag {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-radius: var(--radius-pill);
  padding: 0.2rem 0.65rem;
  background: rgba(6, 139, 234, 0.10);
  color: var(--t-accent);
}

.tcp-learn-greek__tag--green {
  background: var(--t-green-bg);
  color: var(--t-green);
}

.tcp-learn-greek__tag--brand {
  background: rgba(253, 137, 23, 0.10);
  color: var(--t-brand);
}

.tcp-learn-greek p {
  font-size: 0.9rem;
  color: var(--t-text);
  margin-bottom: 0.625rem;
}

.tcp-learn-greek__note {
  font-size: 0.8rem !important;
  color: var(--t-text-muted) !important;
  margin-top: 0.5rem;
}

/* Delta bar visualisation */
.tcp-learn-greek__range {
  margin: 0.875rem 0;
}

.tcp-learn-greek__range-label {
  font-size: 0.72rem;
  color: var(--t-text-muted);
  margin-bottom: 0.3rem;
  font-family: 'DM Mono', monospace;
}

.tcp-learn-greek__bar {
  height: 6px;
  background: var(--t-bg-subtle);
  border-radius: var(--radius-pill);
  overflow: hidden;
  margin-bottom: 0.625rem;
}

.tcp-learn-greek__bar-fill {
  height: 100%;
  border-radius: var(--radius-pill);
}

.tcp-learn-greek__bar-fill--call { background: var(--t-green); }
.tcp-learn-greek__bar-fill--put  { background: var(--t-red); }

/* Theta decay chart */
.tcp-learn-theta-chart {
  margin: 1rem 0;
  background: var(--t-bg-subtle);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem 0.4rem;
}

.tcp-learn-theta-chart__curve svg {
  width: 100%;
  height: 70px;
}

.tcp-learn-theta-chart__labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.7rem;
  color: var(--t-text-muted);
  font-family: 'DM Mono', monospace;
  margin-top: 0.25rem;
}

/* ── IV table ───────────────────────────────────────────────────────────── */
.tcp-learn-iv-table {
  border: 1px solid var(--t-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin: 1.25rem 0 1.5rem;
}

.tcp-learn-iv-row {
  display: grid;
  grid-template-columns: 140px 1fr 1fr;
  gap: 0;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--t-border);
  font-size: 0.83rem;
  line-height: 1.5;
  align-items: start;
}

.tcp-learn-iv-row:last-child { border-bottom: none; }

.tcp-learn-iv-row--header {
  background: var(--t-bg-alt);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--t-text-muted);
}

.tcp-learn-iv-row > span {
  padding: 0 0.5rem;
  color: var(--t-text);
}

.tcp-learn-iv-formula {
  font-family: 'DM Mono', monospace;
  font-size: 0.76rem;
  color: var(--t-text-muted) !important;
}

@media (max-width: 640px) {
  .tcp-learn-iv-row {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }
}

/* ── Spread example ─────────────────────────────────────────────────────── */
.tcp-learn-spread-example {
  background: var(--t-bg-alt);
  border: 1px solid var(--t-border);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin: 1.25rem 0 1.5rem;
}

.tcp-learn-spread-example__title {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--t-text-muted);
  margin-bottom: 1rem;
}

.tcp-learn-spread-example__grid {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.tcp-learn-spread-example__leg {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  background: var(--t-bg-surface);
  border: 1px solid var(--t-border-med);
  border-radius: var(--radius-md);
  padding: 0.75rem 1.25rem;
  min-width: 110px;
}

.tcp-learn-spread-example__leg--sell { border-top: 3px solid var(--t-green); }
.tcp-learn-spread-example__leg--buy  { border-top: 3px solid var(--t-red); }

.tcp-learn-spread-example__leg-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--t-text-muted);
}

.tcp-learn-spread-example__leg-strike {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--t-text-strong);
  font-family: 'DM Mono', monospace;
}

.tcp-learn-spread-example__leg-collect {
  font-size: 0.75rem;
  color: var(--t-text-muted);
  font-family: 'DM Mono', monospace;
}

.tcp-learn-spread-example__plus,
.tcp-learn-spread-example__eq {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--t-text-muted);
}

.tcp-learn-spread-example__result {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.2rem;
  background: var(--t-green-bg);
  border: 1px solid var(--t-green);
  border-radius: var(--radius-md);
  padding: 0.75rem 1.25rem;
  min-width: 140px;
}

.tcp-learn-spread-example__result-label {
  font-size: 0.65rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--t-green);
}

.tcp-learn-spread-example__result-value {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--t-green);
  font-family: 'DM Mono', monospace;
}

/* ── CTA block within a section ─────────────────────────────────────────── */
.tcp-learn-cta-block {
  background: var(--t-bg-alt);
  border: 1px solid var(--t-border-med);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin-top: 2rem;
}

.tcp-learn-cta-block__title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--t-text-strong);
  margin-bottom: 0.5rem;
}

.tcp-learn-cta-block__body {
  font-size: 0.9rem;
  color: var(--t-text);
  margin-bottom: 1.125rem;
}

.tcp-learn-cta-block__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
}

/* ── Glossary ───────────────────────────────────────────────────────────── */
.tcp-learn-glossary {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border: 1px solid var(--t-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

@media (max-width: 640px) {
  .tcp-learn-glossary { grid-template-columns: 1fr; }
}

.tcp-learn-glossary__entry {
  padding: 0.875rem 1rem;
  border-bottom: 1px solid var(--t-border);
  scroll-margin-top: 80px;
}

.tcp-learn-glossary__entry:nth-child(odd) {
  border-right: 1px solid var(--t-border);
}

@media (max-width: 640px) {
  .tcp-learn-glossary__entry:nth-child(odd) { border-right: none; }
}

.tcp-learn-glossary__entry dt {
  font-size: 0.83rem;
  font-weight: 700;
  color: var(--t-text-strong);
  margin-bottom: 0.25rem;
}

.tcp-learn-glossary__entry dd {
  font-size: 0.8rem;
  color: var(--t-text-muted);
  margin: 0;
  line-height: 1.5;
}

/* ── Bottom CTA ─────────────────────────────────────────────────────────── */
.tcp-learn-bottom-cta {
  background: linear-gradient(135deg, rgba(253, 137, 23, 0.06) 0%, rgba(6, 139, 234, 0.06) 100%);
  border: 1px solid var(--t-border-med);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  text-align: center;
  margin-top: 2.5rem;
}

.tcp-learn-bottom-cta__title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--t-text-strong);
  margin-bottom: 0.625rem;
}

.tcp-learn-bottom-cta__body {
  font-size: 0.95rem;
  color: var(--t-text);
  max-width: 480px;
  margin: 0 auto 1.375rem;
  line-height: 1.65;
}

.tcp-learn-bottom-cta__actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.625rem;
  margin-bottom: 1.25rem;
}

.tcp-learn-bottom-cta__disclaimer {
  font-size: 0.72rem;
  color: var(--t-text-faint);
  margin: 0;
}

/* ── Dark mode overrides ────────────────────────────────────────────────── */
html[data-theme="dark"] .tcp-learn-hero {
  background: var(--t-bg-alt);
}

html[data-theme="dark"] .tcp-learn-card,
html[data-theme="dark"] .tcp-learn-greek,
html[data-theme="dark"] .tcp-learn-compare__col,
html[data-theme="dark"] .tcp-learn-spread-example__leg {
  background: var(--t-bg-surface);
  border-color: var(--t-border);
}

html[data-theme="dark"] .tcp-learn-formula {
  background: var(--t-bg-alt);
}

html[data-theme="dark"] .tcp-learn-toc__cta {
  background: var(--t-bg-alt);
  border-color: var(--t-border);
}

html[data-theme="dark"] .tcp-learn-spread-example {
  background: var(--t-bg-alt);
}

html[data-theme="dark"] .tcp-learn-cta-block {
  background: var(--t-bg-surface);
}

html[data-theme="dark"] .tcp-learn-iv-row--header {
  background: var(--t-bg-alt);
}

html[data-theme="dark"] .tcp-learn-theta-chart {
  background: var(--t-bg-subtle);
}

html[data-theme="dark"] .tcp-learn-bottom-cta {
  background: linear-gradient(135deg, rgba(253, 137, 23, 0.05) 0%, rgba(6, 139, 234, 0.05) 100%);
}