/* === Lesson layout === */
.lesson {
  padding-bottom: var(--space-16);
}

.lesson__header {
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
}

/* Decorative dot grid behind lesson header */
.lesson__header::before {
  content: '';
  position: absolute;
  top: -20px;
  right: -20px;
  width: 120px;
  height: 120px;
  background-image: radial-gradient(circle, rgba(240, 180, 41, 0.08) 1px, transparent 1px);
  background-size: 12px 12px;
  opacity: 0.6;
  pointer-events: none;
}

.lesson__breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--text-dim);
  flex-wrap: wrap;
}

.lesson__breadcrumb-link {
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--duration-fast) var(--ease-out);
}

.lesson__breadcrumb-link:hover {
  color: var(--accent-primary);
}

.lesson__breadcrumb-sep {
  opacity: 0.4;
}

.lesson__title {
  font-size: var(--text-4xl);
  margin-bottom: var(--space-3);
  line-height: 1.15;
  animation: textUnblur 0.8s var(--ease-out) forwards;
}

.lesson__meta {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--text-secondary);
}

/* === Lesson diagram === */
.lesson__diagram {
  margin-bottom: var(--space-8);
  padding: var(--space-8);
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  min-height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  position: relative;
}

/* Dot pattern behind diagram */
.lesson__diagram::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(240, 180, 41, 0.03) 1px, transparent 1px);
  background-size: 20px 20px;
  pointer-events: none;
}

.lesson__diagram-loading {
  display: flex;
  align-items: center;
  justify-content: center;
}

.lesson__diagram svg {
  max-width: 100%;
  height: auto;
  position: relative;
  z-index: 1;
}

/* === Lesson content === */
.lesson__content {
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--text-primary);
}

.lesson__content h2 {
  margin-top: var(--space-10);
  margin-bottom: var(--space-4);
  padding-top: var(--space-6);
  border-top: 1px solid var(--border-subtle);
  color: var(--accent-primary);
  position: relative;
}

/* Accent marker on h2 */
.lesson__content h2::before {
  content: '';
  position: absolute;
  top: -1px;
  left: 0;
  width: 60px;
  height: 2px;
  background: var(--accent-primary);
}

.lesson__content h3 {
  margin-top: var(--space-8);
  margin-bottom: var(--space-3);
  color: var(--text-primary);
}

.lesson__content h4 {
  margin-top: var(--space-6);
  margin-bottom: var(--space-2);
  color: var(--accent-blue);
}

.lesson__content p {
  margin-bottom: var(--space-4);
}

.lesson__content ul,
.lesson__content ol {
  margin-bottom: var(--space-6);
  padding-left: var(--space-8);
}

.lesson__content li {
  margin-bottom: var(--space-3);
}

.lesson__content li::marker {
  color: var(--accent-primary);
}

.lesson__content img {
  border-radius: var(--radius-md);
  margin: var(--space-6) 0;
}

/* === Callout boxes - distinctive left-border + background treatment === */

/* Key concept callout */
.lesson__content .key-concept {
  background: linear-gradient(135deg, rgba(240, 180, 41, 0.06) 0%, rgba(28, 25, 23, 0.8) 100%);
  border: 1px solid rgba(240, 180, 41, 0.12);
  border-left: 4px solid var(--accent-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-5) var(--space-6);
  margin: var(--space-6) 0;
  position: relative;
}

.lesson__content .key-concept::before {
  content: '';
  position: absolute;
  top: 0;
  left: 4px;
  bottom: 0;
  width: 40px;
  background: linear-gradient(90deg, rgba(240, 180, 41, 0.04), transparent);
  pointer-events: none;
}

.lesson__content .key-concept strong:first-child {
  color: var(--accent-primary);
  font-family: var(--font-heading);
  display: block;
  margin-bottom: var(--space-2);
}

.lesson__content .key-concept strong:not(:first-child) {
  color: var(--accent-primary);
}

/* Warning callout */
.lesson__content .warning {
  background: linear-gradient(135deg, rgba(232, 85, 58, 0.06) 0%, rgba(28, 25, 23, 0.8) 100%);
  border: 1px solid rgba(232, 85, 58, 0.12);
  border-left: 4px solid var(--accent-warm);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-5) var(--space-6);
  margin: var(--space-6) 0;
}

.lesson__content .warning strong {
  color: var(--accent-warm);
  font-family: var(--font-heading);
}

/* Pro tip callout */
.lesson__content .pro-tip {
  background: linear-gradient(135deg, rgba(196, 167, 231, 0.06) 0%, rgba(28, 25, 23, 0.8) 100%);
  border: 1px solid rgba(196, 167, 231, 0.12);
  border-left: 4px solid var(--accent-purple);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: var(--space-5) var(--space-6);
  margin: var(--space-6) 0;
}

.lesson__content .pro-tip strong {
  color: var(--accent-purple);
  font-family: var(--font-heading);
}

/* Example box */
.lesson__content .example-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: var(--space-5) var(--space-6);
  margin: var(--space-6) 0;
  position: relative;
  overflow: hidden;
}

/* Top accent on example box */
.lesson__content .example-box::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple), transparent);
}

.lesson__content .example-box h4 {
  margin-top: 0;
  color: var(--accent-blue);
  font-size: var(--text-base);
}

/* === Comparison table - with hover glow === */
.lesson__content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-6) 0;
  font-size: var(--text-sm);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.lesson__content thead th {
  background: var(--bg-elevated);
  font-family: var(--font-heading);
  font-weight: 600;
  text-align: left;
  padding: var(--space-3) var(--space-4);
  border-bottom: 2px solid var(--accent-primary);
  color: var(--accent-primary);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.lesson__content tbody td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}

.lesson__content tbody tr:hover td {
  background: rgba(240, 180, 41, 0.03);
  color: var(--text-primary);
}

/* === Interactive modules === */
.lesson__content .interactive {
  margin: var(--space-6) 0;
  min-height: 100px;
}

/* === Lesson navigation === */
.lesson__nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: var(--space-12);
  padding-top: var(--space-8);
  border-top: 1px solid var(--border-subtle);
  gap: var(--space-4);
}

.lesson__nav .btn {
  max-width: 45%;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ============================================
   DASHBOARD STYLES
   ============================================ */

/* Hero with scanning line effect */
.dashboard__hero {
  position: relative;
  padding: var(--space-16) var(--space-8) var(--space-12);
  margin: calc(-1 * var(--space-10)) calc(-1 * var(--space-8)) var(--space-10);
  background: var(--gradient-hero);
  border-bottom: 1px solid rgba(240, 180, 41, 0.08);
  overflow: hidden;
}

.dashboard__hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 60%, rgba(240, 180, 41, 0.07) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(126, 184, 218, 0.05) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 90%, rgba(196, 167, 231, 0.04) 0%, transparent 50%);
  pointer-events: none;
}

/* Horizontal scan line */
.dashboard__hero-bg::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(240, 180, 41, 0.3), transparent);
  animation: scanLine 6s ease-in-out infinite;
  animation-delay: 1s;
}

/* Dot grid behind hero */
.dashboard__hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(240, 180, 41, 0.04) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: radial-gradient(ellipse at 30% 50%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 30% 50%, black 20%, transparent 70%);
  pointer-events: none;
}

.dashboard__hero-content {
  position: relative;
  max-width: var(--content-max-width);
  margin: 0 auto;
}

.dashboard__overline {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--accent-primary);
  margin-bottom: var(--space-4);
  opacity: 0;
  animation: revealLeft 0.6s var(--ease-out) 0.1s forwards;
}

.dashboard__title {
  font-size: var(--text-5xl);
  font-weight: 800;
  margin-bottom: var(--space-4);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0;
  animation: textUnblur 1s var(--ease-out) 0.2s forwards;
}

.dashboard__subtitle {
  color: var(--text-secondary);
  font-size: var(--text-lg);
  max-width: 600px;
  margin-bottom: var(--space-8);
  opacity: 0;
  animation: revealUp 0.7s var(--ease-out) 0.4s forwards;
}

.dashboard__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  max-width: 520px;
  opacity: 0;
  animation: revealUp 0.7s var(--ease-out) 0.6s forwards;
}

.dashboard__stats .stat {
  background: rgba(28, 25, 23, 0.5);
  border: 1px solid rgba(240, 180, 41, 0.06);
  border-radius: var(--radius-md);
  backdrop-filter: blur(8px);
  padding: var(--space-3) var(--space-2);
}

.dashboard__progress-bar {
  margin-top: var(--space-6);
  max-width: 400px;
  opacity: 0;
  animation: revealUp 0.7s var(--ease-out) 0.8s forwards;
}

.dashboard__section-title {
  margin-bottom: var(--space-2);
}

.dashboard__section-desc {
  color: var(--text-secondary);
  font-size: var(--text-sm);
  margin-bottom: var(--space-6);
}

/* Module grid - two-column with last card spanning full width */
.dashboard__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}

.dashboard__grid .card--module:last-child:nth-child(odd) {
  grid-column: 1 / -1;
}

.dashboard__grid .card--module {
  text-decoration: none;
  color: inherit;
}

.dashboard__modules {
  margin-bottom: var(--space-10);
}


/* === Responsive === */
@media (max-width: 768px) {
  .dashboard__grid {
    grid-template-columns: 1fr;
  }

  .dashboard__grid .card--module:last-child:nth-child(odd) {
    grid-column: 1;
  }
}

@media (max-width: 640px) {
  .dashboard__hero {
    padding: var(--space-8) var(--space-4);
  }

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

  .dashboard__title {
    font-size: var(--text-3xl);
  }

  .lesson__title {
    font-size: var(--text-2xl);
  }

  .lesson__nav {
    flex-direction: column;
  }

  .lesson__nav .btn {
    max-width: 100%;
    width: 100%;
    justify-content: center;
  }
}