/* ── LESSON LAYOUT ── */
.lesson-page { max-width: 780px; margin: 0 auto; padding: 100px 24px 80px; }

.lesson-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 14px;
  text-decoration: none;
  margin-bottom: 40px;
  transition: color 0.2s;
}
.lesson-back:hover { color: var(--cyan); }

/* ── PROGRESS BAR ── */
.progress-bar { display: flex; gap: 6px; margin-bottom: 48px; }
.progress-step { flex: 1; height: 4px; border-radius: 2px; background: var(--border); }
.progress-step.done { background: var(--cyan); }
.progress-step.active { background: rgba(0,212,255,0.5); }

/* ── LESSON HEADER ── */
.lesson-header { margin-bottom: 48px; }
.lesson-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.lesson-tag { font-size: 12px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; color: var(--cyan); }
.lesson-tag-sep { color: var(--muted); }
.lesson-free-badge {
  padding: 4px 12px;
  border-radius: 100px;
  background: rgba(0,212,255,0.1);
  border: 1px solid rgba(0,212,255,0.25);
  color: var(--cyan);
  font-size: 12px;
  font-weight: 700;
}
.lesson-title { font-size: clamp(32px, 5vw, 52px); font-weight: 900; line-height: 1.1; margin-bottom: 16px; }
.lesson-desc { font-size: 18px; color: var(--muted); line-height: 1.7; }

/* ── IMAGES ── */
.lesson-img-wrap { position: relative; margin: 40px 0; }
.lesson-img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: 16px;
  margin: 0;
  border: 1px solid var(--border);
  display: block;
}
.lesson-img-caption { text-align: center; font-size: 13px; color: var(--muted); margin-top: 10px; }

/* ── BODY TYPOGRAPHY ── */
.lesson-body h2 { font-size: 26px; font-weight: 800; margin: 44px 0 16px; color: var(--text); }
.lesson-body h3 { font-size: 19px; font-weight: 700; margin: 32px 0 12px; color: var(--text); }
.lesson-body p { font-size: 16px; color: #a8b8d8; line-height: 1.85; margin-bottom: 16px; }
.lesson-body strong { color: var(--text); font-weight: 700; }

/* ── HIGHLIGHT BOX ── */
.highlight-box {
  background: rgba(0,212,255,0.05);
  border: 1px solid rgba(0,212,255,0.2);
  border-left: 3px solid var(--cyan);
  border-radius: 0 12px 12px 0;
  padding: 20px 24px;
  margin: 28px 0;
}
.highlight-box p { margin: 0; color: var(--text); }

/* ── CONCEPT CARDS ── */
.concept-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin: 28px 0;
}
.concept-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  transition: border-color 0.2s;
}
.concept-card:hover { border-color: rgba(0,212,255,0.25); }
.concept-icon { font-size: 24px; margin-bottom: 10px; }
.concept-title { font-size: 14px; font-weight: 700; margin-bottom: 6px; color: var(--text); }
.concept-desc { font-size: 13px; color: var(--muted); line-height: 1.5; }

/* ── CTA BANNER ── */
.cta-banner {
  background: linear-gradient(135deg, rgba(0,212,255,0.08), rgba(26,107,255,0.08));
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 16px;
  padding: 32px;
  text-align: center;
  margin: 48px 0;
}
.cta-banner h3 { font-size: 20px; font-weight: 800; margin-bottom: 8px; }
.cta-banner p { color: var(--muted); font-size: 15px; margin-bottom: 20px; }

/* ── LESSON NAV ── */
.lesson-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
  gap: 16px;
  flex-wrap: wrap;
}
.lesson-nav a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 12px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.2s;
}
.nav-prev { border: 1px solid var(--border); color: var(--muted); }
.nav-prev:hover { border-color: rgba(0,212,255,0.3); color: var(--text); }
.nav-next { background: linear-gradient(135deg, var(--cyan), var(--blue)); color: #000; font-weight: 700; }
.nav-next:hover { transform: translateY(-2px); box-shadow: 0 0 30px rgba(0,212,255,0.3); }

/* ── CANDLE DIAGRAM (lesson 2) ── */
.candle-demo {
  display: flex;
  gap: 32px;
  align-items: flex-end;
  justify-content: center;
  padding: 40px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  margin: 28px 0;
  flex-wrap: wrap;
}
.candle-wrap { display: flex; flex-direction: column; align-items: center; gap: 8px; }
.candle-label { font-size: 13px; font-weight: 700; }
.candle-diagram { display: flex; flex-direction: column; align-items: center; }
.candle-wick { width: 2px; background: var(--muted); }
.candle-body { width: 28px; border-radius: 3px; }
.candle-green .candle-body { background: #22c55e; }
.candle-red .candle-body { background: #ef4444; }
.candle-green .candle-label { color: #22c55e; }
.candle-red .candle-label { color: #ef4444; }
.candle-annotation { font-size: 11px; color: var(--muted); text-align: center; max-width: 90px; }

/* ── STEPS LIST (lesson 3) ── */
.steps-list { margin: 28px 0; display: flex; flex-direction: column; gap: 16px; }
.step-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 22px 24px;
  transition: border-color 0.2s;
}
.step-item:hover { border-color: rgba(0,212,255,0.25); }
.step-num-circle {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 15px;
  color: #000;
  flex-shrink: 0;
}
.step-content-title { font-weight: 700; font-size: 15px; margin-bottom: 4px; color: var(--text); }
.step-content-desc { font-size: 14px; color: var(--muted); line-height: 1.5; }

/* ── DO / DON'T (lesson 3) ── */
.do-dont { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 28px 0; }
.do-card {
  background: rgba(34,197,94,0.05);
  border: 1px solid rgba(34,197,94,0.2);
  border-radius: 12px;
  padding: 20px;
}
.dont-card {
  background: rgba(239,68,68,0.05);
  border: 1px solid rgba(239,68,68,0.2);
  border-radius: 12px;
  padding: 20px;
}
.do-card .card-head { color: #22c55e; font-weight: 700; font-size: 14px; margin-bottom: 12px; }
.dont-card .card-head { color: #ef4444; font-weight: 700; font-size: 14px; margin-bottom: 12px; }
.do-card li, .dont-card li {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
  list-style: none;
  padding-left: 16px;
  position: relative;
  line-height: 1.5;
}
.do-card li::before { content: '✓'; position: absolute; left: 0; color: #22c55e; }
.dont-card li::before { content: '✗'; position: absolute; left: 0; color: #ef4444; }

/* ── RESPONSIVE ── */
@media (max-width: 500px) {
  .do-dont { grid-template-columns: 1fr; }
  .candle-demo { gap: 20px; padding: 24px; }
  .lesson-nav { flex-direction: column; }
  .lesson-nav a { width: 100%; justify-content: center; }
}

/* ── ДОБАВИТЬ В КОНЕЦ lessons.css ── */

/* Новая обёртка с сайдбаром */
.lesson-wrapper {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 48px;
  max-width: 1140px;
  margin: 0 auto;
  padding: 100px 24px 80px;
  align-items: start;
}

/* Страница урока внутри обёртки — убираем старые отступы */
.lesson-wrapper .lesson-page {
  padding: 0;
  max-width: 100%;
  margin: 0;
}

/* ── SIDEBAR ── */
.lesson-sidebar {
  position: sticky;
  top: 90px;
}

.sidebar-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 14px;
}

.sidebar-steps {
  display: flex;
  flex-direction: column;
}

.sidebar-step {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 10px;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s;
  text-decoration: none;
}

.sidebar-step:hover {
  background: rgba(255,255,255,0.04);
}

.sidebar-step.active {
  background: rgba(0,212,255,0.08);
}

.sidebar-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--muted);
  flex-shrink: 0;
  transition: all 0.2s;
}

.sidebar-step.active .sidebar-dot {
  background: var(--cyan);
  box-shadow: 0 0 6px rgba(0,212,255,0.5);
}

.sidebar-step-text {
  font-size: 13px;
  color: var(--muted);
  transition: color 0.2s;
  line-height: 1.3;
}

.sidebar-step.active .sidebar-step-text {
  color: var(--text);
}

.sidebar-progress-line {
  width: 1px;
  background: var(--border);
  margin: 3px 0 3px 13px;
  height: 14px;
}

/* ── SIDEBAR LESSONS LIST ── */
.sidebar-lessons {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-lesson-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 8px;
  text-decoration: none;
  font-size: 13px;
  color: var(--muted);
  transition: all 0.2s;
}

.sidebar-lesson-link:hover {
  background: rgba(255,255,255,0.04);
  color: var(--text);
}

.sidebar-lesson-link.active-lesson {
  color: var(--cyan);
}

.sidebar-lesson-num {
  font-size: 11px;
  font-weight: 700;
  color: var(--muted);
  min-width: 20px;
}

.sidebar-lesson-link.active-lesson .sidebar-lesson-num {
  color: var(--cyan);
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .lesson-wrapper {
    grid-template-columns: 1fr;
    padding: 80px 20px 60px;
    gap: 0;
  }
  .lesson-sidebar {
    display: none;
  }
}