/* ============================================
   Finance Forest - Lesson Experience
   Shared lesson page styling (v2)
   ============================================ */

.lesson-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--color-border);
  background:
    radial-gradient(circle at 14% 18%, rgb(255 255 255 / 0.86), transparent 42%),
    radial-gradient(circle at 85% 8%, rgb(34 197 94 / 0.2), transparent 32%),
    linear-gradient(124deg, #f0fdf4 0%, #e0f2fe 42%, #f8fafc 100%);
}

.lesson-hero::before {
  content: "";
  position: absolute;
  inset: auto 14% -28% auto;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgb(34 197 94 / 0.14) 0%, transparent 72%);
  pointer-events: none;
}

.lesson-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(110deg, rgb(255 255 255 / 0.56) 0%, transparent 40%),
    repeating-linear-gradient(
      -35deg,
      rgb(255 255 255 / 0.18) 0,
      rgb(255 255 255 / 0.18) 1px,
      transparent 1px,
      transparent 18px
    );
  mix-blend-mode: soft-light;
  pointer-events: none;
}

.lesson-hero .container {
  position: relative;
  z-index: 1;
}

.lesson-hero .text-3xl {
  font-size: clamp(2rem, 4.6vw, 2.95rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  max-width: 21ch;
}

.lesson-content {
  --lesson-font-scale: 1;
  max-width: 760px;
}

.lesson-content h2 {
  margin-top: var(--space-10);
  margin-bottom: var(--space-5);
  padding-top: var(--space-3);
  border-top: 1px solid var(--color-border-light);
  font-size: clamp(1.5rem, 2.4vw, 1.9rem);
  letter-spacing: -0.01em;
}

.lesson-content h3 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
  font-size: clamp(1.15rem, 2vw, 1.4rem);
}

.lesson-content p,
.lesson-content li {
  font-size: calc(1.04rem * var(--lesson-font-scale));
  line-height: 1.78;
}

.lesson-content .text-lg {
  font-size: calc(1.2rem * var(--lesson-font-scale));
  line-height: 1.75;
}

.lesson-content .text-sm,
.lesson-content .callout-content {
  font-size: calc(0.92rem * var(--lesson-font-scale));
  line-height: 1.7;
}

.lesson-content ul li::marker,
.lesson-content ol li::marker {
  color: var(--color-primary-dark);
}

.callout {
  position: relative;
  border-left-width: 5px;
  border-radius: var(--radius-xl);
  box-shadow: 0 8px 30px rgb(15 23 42 / 0.05);
}

.callout-title {
  font-size: var(--text-base);
  letter-spacing: 0.01em;
}

.callout-success {
  background-color: rgb(34 197 94 / 0.14);
  border-color: var(--color-success);
}

.card {
  border: 1px solid var(--color-border-light);
  box-shadow: 0 16px 38px rgb(15 23 42 / 0.06);
}

/* Dense lesson tables (common in Modules 7-8) */
.lesson-content table {
  width: 100% !important;
  border-collapse: collapse;
  margin-top: var(--space-2);
  margin-bottom: var(--space-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: rgb(255 255 255 / 0.82);
}

.lesson-content thead tr {
  background: linear-gradient(135deg, rgb(34 197 94 / 0.1), rgb(59 130 246 / 0.08));
}

.lesson-content th,
.lesson-content td {
  text-align: left;
  vertical-align: top;
  padding: 0.62rem 0.7rem !important;
}

.lesson-content th {
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-light);
  font-weight: var(--font-bold);
}

.lesson-content tbody tr {
  border-bottom: 1px solid var(--color-border-light) !important;
}

.lesson-content tbody tr:last-child {
  border-bottom: 0 !important;
}

.lesson-content tbody tr:nth-child(even) {
  background: rgb(148 163 184 / 0.06);
}

.lesson-content tbody tr:hover {
  background: rgb(59 130 246 / 0.08);
}

.lesson-navigation {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  gap: var(--space-3);
  margin-top: var(--space-16);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.lesson-navigation.mt-12 {
  margin-top: var(--space-16);
}

.lesson-navigation > .flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  width: 100%;
}

.lesson-paycheck {
  font-family: var(--font-mono);
}

.lesson-card-gradient {
  background: linear-gradient(135deg, #ecfdf5 0%, #dbeafe 100%);
  border: 1px solid #bfdbfe;
}

.lesson-resource-link {
  justify-content: flex-start;
  text-align: left;
}

.lesson-explore {
  width: 100%;
  max-width: 760px;
  margin-left: auto;
  margin-right: auto;
  margin-top: var(--space-8);
  border: 1px solid #bfd9f6;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 88% 10%, rgb(59 130 246 / 0.18), transparent 40%),
    linear-gradient(140deg, rgb(236 253 245 / 0.86), rgb(219 234 254 / 0.88));
  box-shadow: 0 14px 30px rgb(15 23 42 / 0.08);
  overflow: hidden;
}

.lesson-explore-body {
  padding: var(--space-5);
}

.lesson-explore-label {
  display: inline-flex;
  font-size: 0.66rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: var(--font-bold);
  color: var(--color-primary-dark);
  padding: 0.2rem 0.55rem;
  border-radius: var(--radius-full);
  border: 1px solid rgb(34 197 94 / 0.28);
  background: rgb(34 197 94 / 0.12);
  margin-bottom: var(--space-3);
}

.lesson-explore-title {
  margin: 0;
  font-size: 1.15rem;
}

.lesson-explore-subtitle {
  margin: var(--space-2) 0 var(--space-4);
  color: var(--color-text-light);
  font-size: var(--text-sm);
}

.lesson-explore-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 0.6rem;
}

.lesson-explore-link {
  display: block;
  text-decoration: none;
  color: var(--color-text);
  border: 1px solid rgb(148 163 184 / 0.3);
  border-radius: var(--radius-md);
  padding: 0.68rem 0.8rem;
  background: rgb(255 255 255 / 0.76);
  font-weight: var(--font-medium);
  transition: border-color var(--transition-fast), transform var(--transition-fast), background-color var(--transition-fast);
}

.lesson-explore-link:hover {
  border-color: var(--color-primary);
  background: rgb(255 255 255 / 0.95);
  transform: translateY(-1px);
}

.contact-grid {
  align-items: stretch;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.contact-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  height: 100%;
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  background: rgb(255 255 255 / 0.72);
}

.contact-card p {
  margin: 0;
  overflow-wrap: anywhere;
  word-break: break-word;
  line-height: 1.6;
}

.contact-card-row {
  display: grid;
  grid-template-columns: minmax(120px, 170px) 1fr;
  align-items: start;
  gap: var(--space-3);
}

.contact-card-row h5 {
  margin: 0;
  line-height: 1.4;
}

.lesson-settings {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.45rem;
  margin-top: var(--space-4);
  padding: 0.4rem;
  border-radius: var(--radius-xl);
  background: rgb(255 255 255 / 0.72);
  border: 1px solid rgb(148 163 184 / 0.26);
  backdrop-filter: blur(8px);
}

.lesson-settings-label {
  font-size: var(--text-xs);
  color: var(--color-text-light);
  margin-right: 0.2rem;
  padding: 0 0.35rem;
  font-weight: var(--font-semibold);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.lesson-setting-btn {
  border: 1px solid var(--color-border);
  background: rgb(255 255 255 / 0.9);
  color: var(--color-text);
  padding: 0.34rem 0.65rem;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--font-semibold);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lesson-setting-btn:hover {
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

.lesson-setting-btn.active {
  color: white;
  border-color: var(--color-primary-dark);
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
}

.lesson-setting-btn:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

/* Font size modes */
body.lesson-font-sm .lesson-content { --lesson-font-scale: 0.92; }
body.lesson-font-md .lesson-content { --lesson-font-scale: 1; }
body.lesson-font-lg .lesson-content { --lesson-font-scale: 1.12; }

/* Dark mode for lessons */
html.theme-dark {
  --color-background: #0b1220;
  --color-surface: #131d30;
  --color-text: #e5edf6;
  --color-text-light: #9db0c7;
  --color-text-muted: #7f93ac;
  --color-border: #25334a;
  --color-border-light: #1b2a42;
  --color-primary-bg: #123225;
  --color-secondary-bg: #162a47;
  --color-accent-bg: #3a2b12;
  background-color: #0b1220;
  color: #e5edf6;
}

html.theme-dark .navbar {
  background-color: rgb(11 18 32 / 0.86);
  border-bottom-color: #23344f;
}

html.theme-dark .navbar-logo,
html.theme-dark .navbar-link.active,
html.theme-dark .navbar-link:hover {
  color: #f8fafc;
}

html.theme-dark .navbar-link {
  color: #b7c6db;
}

html.theme-dark .lesson-hero {
  background:
    radial-gradient(circle at 16% 16%, rgb(59 130 246 / 0.2), transparent 45%),
    radial-gradient(circle at 82% 12%, rgb(34 197 94 / 0.18), transparent 38%),
    linear-gradient(125deg, #0f1b2f 0%, #152640 52%, #0d1727 100%);
  border-bottom-color: #1d2b42;
}

html.theme-dark .lesson-settings {
  background: rgb(8 15 29 / 0.62);
  border-color: #2a3f5c;
}

html.theme-dark .lesson-setting-btn {
  background: #102038;
  border-color: #2d4361;
  color: #dce7f5;
}

html.theme-dark .lesson-setting-btn.active {
  color: #05121f;
  border-color: #60a5fa;
  background: linear-gradient(135deg, #86efac, #60a5fa);
}

html.theme-dark .card {
  background-color: #101b2d;
  border-color: #243851;
  box-shadow: 0 18px 40px rgb(2 7 18 / 0.35);
}

html.theme-dark .callout-info {
  background-color: rgb(59 130 246 / 0.16);
}

html.theme-dark .callout-tip {
  background-color: rgb(34 197 94 / 0.16);
}

html.theme-dark .callout-warning {
  background-color: rgb(245 158 11 / 0.16);
}

html.theme-dark .callout-success {
  background-color: rgb(34 197 94 / 0.2);
}

html.theme-dark .lesson-card-gradient {
  background: linear-gradient(135deg, rgb(34 197 94 / 0.18) 0%, rgb(59 130 246 / 0.18) 100%);
  border-color: #325172;
}

html.theme-dark .lesson-explore {
  border-color: #36557a;
  background:
    radial-gradient(circle at 84% 10%, rgb(59 130 246 / 0.2), transparent 42%),
    linear-gradient(140deg, rgb(18 39 63 / 0.9), rgb(18 33 55 / 0.9));
  box-shadow: 0 14px 34px rgb(2 7 18 / 0.28);
}

html.theme-dark .lesson-explore-label {
  color: #bbf7d0;
  border-color: rgb(34 197 94 / 0.42);
  background: rgb(34 197 94 / 0.18);
}

html.theme-dark .lesson-explore-subtitle {
  color: #c6d5e9;
}

html.theme-dark .lesson-explore-link {
  color: #e5edf6;
  border-color: #3a5478;
  background: rgb(19 36 59 / 0.9);
}

html.theme-dark .lesson-explore-link:hover {
  border-color: #60a5fa;
  background: rgb(25 46 74 / 0.94);
}

html.theme-dark .contact-card {
  background: rgb(16 32 56 / 0.64);
  border-color: #2f4563;
}

html.theme-dark .lesson-content table {
  background-color: rgb(19 29 48 / 0.86);
  border-color: #324964;
}

html.theme-dark .lesson-content thead tr {
  background: linear-gradient(135deg, rgb(34 197 94 / 0.2), rgb(59 130 246 / 0.18));
}

html.theme-dark .lesson-content th {
  color: #c6d5e8;
}

html.theme-dark .lesson-content tbody tr {
  border-bottom-color: #273a53 !important;
}

html.theme-dark .lesson-content tbody tr:nth-child(even) {
  background: rgb(148 163 184 / 0.09);
}

html.theme-dark .lesson-content tbody tr:hover {
  background: rgb(59 130 246 / 0.14);
}

/* Ensure highlighted inline terms remain readable in dark mode. */
html.theme-dark .key-term {
  color: #1f2937;
  background: linear-gradient(135deg, #fde68a 0%, #fcd34d 100%);
  border: 1px solid #f59e0b;
}

html.theme-dark .text-primary {
  color: #86efac;
}

html.theme-dark .text-secondary {
  color: #93c5fd;
}

html.theme-dark .text-accent {
  color: #fcd34d;
}

html.theme-dark .badge-primary {
  color: #dcfce7;
  background-color: rgb(34 197 94 / 0.22);
  border: 1px solid rgb(34 197 94 / 0.45);
}

html.theme-dark .lesson-card-gradient .text-light {
  color: #c3d3e8;
}

html.theme-dark .footer {
  background-color: #060c17;
  color: #e5edf6;
  border-top: 1px solid #1c2b43;
}

html.theme-dark .footer-logo {
  color: #f8fafc;
}

html.theme-dark .footer-description,
html.theme-dark .footer-links a,
html.theme-dark .footer-bottom {
  color: #9eb1c9;
}

html.theme-dark .footer-links a:hover {
  color: #f8fafc;
}

html.theme-dark .footer-bottom {
  border-top-color: rgb(255 255 255 / 0.12);
}

/* Utility classes used heavily in lesson markup */
.space-y-1 > * + * { margin-top: var(--space-1); }
.space-y-2 > * + * { margin-top: var(--space-2); }
.space-y-3 > * + * { margin-top: var(--space-3); }
.space-y-4 > * + * { margin-top: var(--space-4); }

.mt-12 { margin-top: var(--space-12); }
.pt-8 { padding-top: var(--space-8); }
.border-t { border-top: 1px solid var(--color-border); }

@media (max-width: 767px) {
  .lesson-navigation {
    flex-direction: column;
    align-items: stretch;
  }

  .lesson-navigation .btn {
    width: 100%;
  }

  .lesson-navigation > .flex {
    flex-direction: column;
    align-items: stretch;
  }

  .lesson-settings {
    width: 100%;
  }

  .lesson-content table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    white-space: nowrap;
  }

  .lesson-content th,
  .lesson-content td {
    min-width: 120px;
  }

  .contact-card-row {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }
}