/* =============================================
   SMART LOAD ACADEMY — Lesson content system
   Editorial minimalist redesign of .lesson-content:
   typography-first, thin lines instead of color boxes,
   cyan/orange used sparingly (1-2 accents per lesson).
   Does not touch header, sidebar, or quiz styles.
   ============================================= */

.lesson-content {
  max-width: 720px;
  margin: 0 auto;
}

/* ---- Block 1: Text / paragraph ---- */
.lesson-content h2 {
  font-size: 1.5rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.01em;
  margin-top: 3.25rem;
  margin-bottom: 1.25rem;
}

.lesson-content section:first-of-type h2 {
  margin-top: 0;
}

.lesson-content p {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: #b8bac0;
  margin-bottom: 1.5rem;
}

.lesson-content strong,
.lesson-content b {
  color: #ffffff;
  font-weight: 700;
}

.lesson-content ul {
  list-style: none;
  margin: 0 0 1.5rem;
  padding-left: 0;
}

.lesson-content ul li {
  position: relative;
  padding-left: 1.1rem;
  margin-bottom: 0.65rem;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: #b8bac0;
}

.lesson-content ul li::before {
  content: '–';
  position: absolute;
  left: 0;
  color: #55575e;
}

.lesson-content ol {
  counter-reset: lesson-ol;
  list-style: none;
  margin: 0 0 1.5rem;
  padding-left: 0;
}

.lesson-content ol li {
  counter-increment: lesson-ol;
  position: relative;
  padding-left: 1.75rem;
  margin-bottom: 0.65rem;
  font-size: 1.0625rem;
  line-height: 1.7;
  color: #b8bac0;
}

.lesson-content ol li::before {
  content: counter(lesson-ol) '.';
  position: absolute;
  left: 0;
  color: #00D9FF;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

/* ---- Block 2: Formula ---- */
.formula {
  font-family: 'Courier New', monospace;
  font-size: 0.95rem;
  color: #00D9FF;
  border-left: 2px solid #00D9FF;
  padding: 0.2rem 0 0.2rem 1.25rem;
  margin: 1.75rem 0;
  line-height: 1.6;
}

/* ---- Block 3: Pull number ---- */
.pull-number {
  text-align: center;
  margin: 3rem auto;
  padding: 1.75rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.pull-number .value {
  font-size: clamp(2.75rem, 6vw, 3.5rem);
  font-weight: 900;
  color: #FF6B35;
  line-height: 1;
  letter-spacing: -0.02em;
}

.pull-number .context {
  margin: 0.75rem auto 0;
  max-width: 460px;
  font-size: 0.95rem;
  line-height: 1.55;
  color: #8a8f98;
}

/* ---- Block 4: Comparison ---- */
.compare-table {
  margin: 1.75rem 0;
}

.compare-title {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #8a8f98;
  margin-bottom: 0.75rem;
}

.compare-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 1rem;
  padding: 0.7rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.compare-row:last-child {
  border-bottom: none;
}

.compare-row .label {
  color: #8a8f98;
  font-size: 0.95rem;
}

.compare-row .value {
  color: #ffffff;
  font-weight: 600;
  font-size: 0.95rem;
  text-align: right;
  white-space: nowrap;
}

.compare-row .value.accent {
  color: #00D9FF;
}

.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem;
  margin: 1.75rem 0;
}

/* ---- Block 5: Note / warning ---- */
.note {
  border-left: 2px solid #8a8f98;
  padding: 0.1rem 0 0.1rem 1.25rem;
  margin: 1.75rem 0;
}

.note.warning {
  border-left-color: #FF6B35;
}

.note.tip {
  border-left-color: #00D9FF;
}

.note-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #8a8f98;
  margin-bottom: 0.6rem;
}

.note.warning .note-label {
  color: #FF6B35;
}

.note.tip .note-label {
  color: #00D9FF;
}

.note p:last-child,
.note ul:last-child {
  margin-bottom: 0;
}

/* ---- Block 6: Worksheet / practical exercise ---- */
.worksheet {
  margin: 1.75rem 0;
}

.worksheet-row {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 0.85rem 0;
}

.worksheet-row .label {
  color: #8a8f98;
  font-size: 0.95rem;
  white-space: nowrap;
}

.worksheet-row .line {
  flex: 1;
  min-width: 4rem;
  height: 1px;
  align-self: end;
  margin-bottom: 0.3rem;
  border-bottom: 1px dotted rgba(255, 255, 255, 0.35);
}

.worksheet-row.highlight {
  margin-top: 0.5rem;
  padding-top: 1.1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.worksheet-row.highlight .line {
  border-bottom: 1px solid #00D9FF;
}

.worksheet-row.highlight .label {
  color: #00D9FF;
  font-weight: 700;
}

/* ---- Block 7: Checklist ---- */
.checklist {
  margin: 1.75rem 0;
}

.checklist-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #8a8f98;
  margin-bottom: 1rem;
}

.checklist-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.55rem 0;
}

.checklist-item .box {
  flex-shrink: 0;
  width: 1.15rem;
  height: 1.15rem;
  margin-top: 0.2rem;
  border: 1.5px solid #55575e;
  border-radius: 0.25rem;
}

.checklist-item .text {
  font-size: 1.0625rem;
  line-height: 1.6;
  color: #b8bac0;
}

/* ---- Block 8: Conclusion ---- */
.conclusion {
  text-align: center;
  margin: 3.5rem 0 2rem;
  padding: 2.25rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.conclusion .lead {
  font-size: clamp(1.35rem, 3vw, 1.5rem);
  font-weight: 800;
  color: #ffffff;
  line-height: 1.4;
  max-width: 520px;
  margin: 0 auto 0.75rem;
}

.conclusion .sub {
  font-size: 0.95rem;
  color: #8a8f98;
  line-height: 1.6;
  max-width: 480px;
  margin: 0 auto;
}

.conclusion .accent {
  color: #00D9FF;
}

@media (max-width: 640px) {
  .compare-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .compare-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }

  .compare-row .value {
    text-align: left;
  }

  .worksheet-row {
    flex-wrap: wrap;
  }

  .worksheet-row .label {
    white-space: normal;
  }
}