/* ════════════════════════════════════════════
   LEARN — Courses + Lessons
   Glassmorphism với accent theo theme:
     • indigo-purple (WP101)
     • cyan-blue    (Crawl)
   ════════════════════════════════════════════ */

@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@400;500;600&display=swap');

:root {
  --bg-darkest: #050507;
  --bg-dark:    #0a0a0f;
  --bg-mid:     #14141c;
  --bg-elev:    #1c1c28;

  /* Default theme = indigo (WP101) */
  --accent:      #6366f1;
  --accent-soft: #818cf8;
  --accent-hot:  #a855f7;

  --success: #10b981;
  --warning: #f59e0b;
  --error:   #ef4444;
  --info:    #06b6d4;

  --code-bg: #0d0d14;
  --text-l:        #f8fafc;
  --text-l-muted:  rgba(248,250,252,0.65);
  --text-l-subtle: rgba(248,250,252,0.4);

  --glass-bg-l:        rgba(255,255,255,0.04);
  --glass-bg-hover:    rgba(255,255,255,0.07);
  --glass-border-l:    rgba(255,255,255,0.08);
  --glass-border-strong: rgba(255,255,255,0.15);
}

/* Cyan theme override (Crawl Data) */
body.theme-cyan {
  --accent:      #06b6d4;
  --accent-soft: #67e8f9;
  --accent-hot:  #2563eb;
}

body.learn {
  font-family: 'Be Vietnam Pro', -apple-system, sans-serif !important;
  background: var(--bg-darkest);
  color: var(--text-l);
  line-height: 1.6;
  cursor: auto !important;
  overflow-x: hidden;
}
body.learn::before { display: none; }
body.learn::after  { display: none; }
body.learn #cur-dot, body.learn #cur-ring { display: none !important; }

/* ── Animated background blobs ── */
.bg-blobs {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.25;
  animation: blobFloat 20s infinite ease-in-out;
}
.blob-1 { width: 600px; height: 600px; top: -200px; right: -100px; background: var(--accent); }
.blob-2 { width: 500px; height: 500px; bottom: -150px; left: -100px; background: var(--accent-hot); animation-delay: -7s; }
.blob-3 { width: 400px; height: 400px; top: 40%; left: 50%; background: var(--info); opacity: 0.15; animation-delay: -14s; }
@keyframes blobFloat {
  0%, 100% { transform: translate(0,0) scale(1); }
  33%      { transform: translate(50px,-30px) scale(1.05); }
  66%      { transform: translate(-30px,40px) scale(0.95); }
}

.lesson-wrapper {
  position: relative;
  z-index: 1;
  max-width: 920px;
  margin: 0 auto;
  padding: 40px 24px 100px;
}

/* ── Top nav (sticky pill) ── */
.lesson-nav {
  position: sticky;
  top: 16px;
  z-index: 100;
  background: rgba(10,10,15,0.7);
  backdrop-filter: blur(40px) saturate(180%);
  -webkit-backdrop-filter: blur(40px) saturate(180%);
  border: 1px solid var(--glass-border-l);
  border-radius: 100px;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 40px;
  box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}
.lesson-nav .nav-brand {
  display: flex; align-items: center; gap: 10px;
  font-weight: 700; font-size: 15px;
  color: var(--text-l); text-decoration: none;
}
.nav-logo {
  width: 32px; height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hot) 100%);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 800;
  color: white;
  box-shadow: 0 4px 12px rgba(99,102,241,0.4);
}
body.theme-cyan .nav-logo { box-shadow: 0 4px 12px rgba(6,182,212,0.45); }

.nav-progress {
  display: flex; align-items: center; gap: 12px;
  font-size: 13px; color: var(--text-l-muted);
}
.nav-progress-bar {
  width: 120px; height: 6px;
  background: rgba(255,255,255,0.08);
  border-radius: 100px; overflow: hidden;
}
.nav-progress-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-hot));
  width: 0%;
  transition: width 0.5s ease;
  border-radius: 100px;
}
.nav-back {
  font-size: 13px; color: var(--text-l-muted);
  text-decoration: none;
  display: inline-flex; align-items: center; gap: 6px;
}
.nav-back:hover { color: var(--text-l); }

/* ════════════════════════════════════
   COURSES INDEX (catalog + course detail)
══════════════════════════════════════ */
.catalog-hero {
  text-align: center;
  margin-bottom: 60px;
  padding: 40px 24px 0;
}
.catalog-eyebrow {
  display: inline-block;
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-soft);
  margin-bottom: 14px;
  padding: 6px 14px;
  background: rgba(99,102,241,0.1);
  border: 1px solid rgba(99,102,241,0.3);
  border-radius: 100px;
}
body.theme-cyan .catalog-eyebrow {
  color: var(--accent-soft);
  background: rgba(6,182,212,0.1);
  border-color: rgba(6,182,212,0.3);
}
.catalog-title {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 16px;
  background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,0.7) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.catalog-subtitle {
  font-size: 18px;
  color: var(--text-l-muted);
  max-width: 640px;
  margin: 0 auto;
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 56px;
}
@media (max-width: 1100px) {
  .courses-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 700px) {
  .courses-grid { grid-template-columns: 1fr; }
}
.course-card {
  background: var(--glass-bg-l);
  border: 1px solid var(--glass-border-strong);
  backdrop-filter: blur(40px);
  -webkit-backdrop-filter: blur(40px);
  border-radius: 24px;
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: transform 0.35s ease, border-color 0.35s ease;
  text-decoration: none;
  color: var(--text-l);
  display: flex;
  flex-direction: column;
}
.course-card:hover {
  transform: translateY(-6px);
  border-color: rgba(255,255,255,0.25);
}
.course-card::before {
  content:'';
  position: absolute; top:0; left:0; right:0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.25), transparent);
}
.course-card.theme-indigo {
  background: linear-gradient(160deg, rgba(99,102,241,0.10), rgba(168,85,247,0.05) 60%, transparent);
}
.course-card.theme-cyan {
  background: linear-gradient(160deg, rgba(6,182,212,0.12), rgba(37,99,235,0.06) 60%, transparent);
}
.course-card-head {
  display: flex; align-items: flex-start;
  gap: 14px; margin-bottom: 18px;
}
.course-card-icon {
  width: 56px; height: 56px;
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 24px; color: white;
  flex-shrink: 0;
}
.course-card.theme-indigo .course-card-icon {
  background: linear-gradient(135deg, #6366f1, #a855f7);
  box-shadow: 0 12px 28px rgba(99,102,241,0.4);
}
.course-card.theme-cyan .course-card-icon {
  background: linear-gradient(135deg, #06b6d4, #2563eb);
  box-shadow: 0 12px 28px rgba(6,182,212,0.4);
}
.course-card-meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--text-l-subtle);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.course-card-title {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-top: 4px;
}
.course-card-sub {
  color: var(--text-l-muted);
  font-size: 15px;
  margin-top: 4px;
  line-height: 1.55;
  flex: 1;
}
.course-card-tags {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-top: 20px;
}
.course-card-tag {
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 100px;
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.1);
  color: var(--text-l-muted);
  letter-spacing: 0.04em;
}
.course-card-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--glass-border-l);
}
.course-card-price {
  font-size: 26px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-soft), var(--accent-hot));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -0.02em;
}
.course-card-price small {
  font-size: 12px;
  font-weight: 500;
  color: var(--text-l-subtle);
  -webkit-text-fill-color: var(--text-l-subtle);
  margin-left: 6px;
}
.course-card-cta {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--accent-soft);
  text-transform: uppercase;
  font-weight: 600;
  display: inline-flex; gap: 6px; align-items: center;
}
.course-card:hover .course-card-cta { gap: 10px; }

/* ── Course detail (single course page) ── */
.course-detail {
  margin-bottom: 56px;
}
.course-hero {
  background: var(--glass-bg-l);
  border: 1px solid var(--glass-border-strong);
  backdrop-filter: blur(40px);
  border-radius: 28px;
  padding: 48px 40px;
  margin-bottom: 32px;
  position: relative;
  overflow: hidden;
}
.course-hero::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}
.course-hero-meta {
  display: flex; gap: 10px; flex-wrap: wrap;
  margin-bottom: 22px;
}
.tag-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px;
  background: var(--glass-bg-l);
  border: 1px solid var(--glass-border-strong);
  border-radius: 100px;
  font-size: 12px; font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text-l-muted);
  backdrop-filter: blur(20px);
}
.tag-pill.accent {
  color: var(--accent-soft);
  border-color: rgba(99,102,241,0.3);
}
body.theme-cyan .tag-pill.accent {
  border-color: rgba(6,182,212,0.35);
}
.course-hero-title {
  font-size: 56px;
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 18px;
  background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,0.7) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.course-hero-desc {
  font-size: 17px;
  color: var(--text-l-muted);
  line-height: 1.6;
  max-width: 720px;
  margin-bottom: 26px;
}
.course-hero-cta {
  display: flex; gap: 12px; flex-wrap: wrap;
  margin-top: 8px;
}
.btn-primary {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 24px;
  background: linear-gradient(135deg, var(--accent), var(--accent-hot));
  border: none;
  border-radius: 12px;
  color: white;
  font-size: 14px; font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: 0 8px 24px rgba(99,102,241,0.3);
}
body.theme-cyan .btn-primary { box-shadow: 0 8px 24px rgba(6,182,212,0.32); }
.btn-primary:hover { transform: translateY(-2px); }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 24px;
  background: var(--glass-bg-hover);
  border: 1px solid var(--glass-border-strong);
  border-radius: 12px;
  color: var(--text-l);
  font-size: 14px; font-weight: 600;
  text-decoration: none;
  transition: background 0.2s;
}
.btn-secondary:hover { background: rgba(255,255,255,0.1); }

/* ── Lesson list inside course detail ── */
.lessons-section-title {
  font-size: 13px; font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-l-subtle);
  margin: 14px 0 18px;
  display: flex; align-items: center; gap: 12px;
}
.lessons-section-title::before {
  content:''; flex: 0 0 30px;
  height: 1px; background: var(--text-l-subtle);
}

.lesson-list {
  display: flex; flex-direction: column;
  gap: 10px;
}
.lesson-row {
  display: grid;
  grid-template-columns: 50px 1fr auto auto;
  gap: 18px;
  align-items: center;
  padding: 18px 22px;
  background: var(--glass-bg-l);
  border: 1px solid var(--glass-border-l);
  border-radius: 16px;
  text-decoration: none;
  color: var(--text-l);
  transition: border-color 0.25s, background 0.25s, transform 0.25s;
}
.lesson-row:hover {
  background: var(--glass-bg-hover);
  border-color: var(--glass-border-strong);
  transform: translateX(4px);
}
.lesson-row.locked {
  opacity: 0.55;
  pointer-events: none;
}
.lesson-row .lr-num {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: rgba(99,102,241,0.15);
  border: 1px solid rgba(99,102,241,0.3);
  color: var(--accent-soft);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700;
}
body.theme-cyan .lesson-row .lr-num {
  background: rgba(6,182,212,0.15);
  border-color: rgba(6,182,212,0.35);
}
.lr-info {
  display: flex; flex-direction: column;
  gap: 4px;
  min-width: 0;
}
.lr-title {
  font-size: 16px; font-weight: 700;
  letter-spacing: -0.005em;
}
.lr-sub {
  font-size: 13px; color: var(--text-l-muted);
}
.lr-time {
  font-family: 'JetBrains Mono', monospace;
  font-size: 12px;
  color: var(--text-l-subtle);
  white-space: nowrap;
}
.lr-status {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.lr-status.open {
  color: var(--success);
  background: rgba(16,185,129,0.12);
  border: 1px solid rgba(16,185,129,0.3);
}
.lr-status.locked {
  color: var(--text-l-subtle);
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--glass-border-l);
}

/* ── Service block (Crawl) ── */
.service-block {
  margin-top: 32px;
  padding: 32px;
  background: linear-gradient(135deg, rgba(6,182,212,0.10), rgba(37,99,235,0.10));
  border: 1px solid rgba(6,182,212,0.3);
  border-radius: 24px;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 24px;
  align-items: center;
}
.service-block h3 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.service-block p {
  color: var(--text-l-muted);
  font-size: 15px;
  line-height: 1.55;
  max-width: 540px;
}

/* ════════════════════════════════════
   LESSON PAGE styles (header, TOC, sections, quiz)
══════════════════════════════════════ */
.lesson-header {
  margin-bottom: 56px;
}
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: 13px;
  color: var(--text-l-subtle);
  margin-bottom: 22px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  flex-wrap: wrap;
}
.breadcrumb a {
  color: inherit; text-decoration: none;
  transition: color 0.2s;
}
.breadcrumb a:hover { color: var(--text-l); }
.breadcrumb-arrow { opacity: 0.4; }

.lesson-meta-row {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  margin-bottom: 26px;
}
.tag-level { color: var(--accent-soft) !important; border-color: rgba(99,102,241,0.3) !important; }
.tag-time  { color: var(--success)     !important; border-color: rgba(16,185,129,0.3) !important; }
.tag-skill { color: var(--warning)     !important; border-color: rgba(245,158,11,0.3) !important; }

.lesson-title {
  font-size: 52px;
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 0%, rgba(255,255,255,0.7) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.lesson-subtitle {
  font-size: 19px;
  color: var(--text-l-muted);
  line-height: 1.6;
  max-width: 720px;
}
.author-row {
  display: flex; align-items: center; gap: 14px;
  margin-top: 32px; padding-top: 32px;
  border-top: 1px solid var(--glass-border-l);
}
.author-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #fbbf24, #ec4899, var(--accent));
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; color: white; font-size: 16px;
}
.author-info h4 { font-size: 14px; font-weight: 600; margin-bottom: 2px; }
.author-info p  { font-size: 12px; color: var(--text-l-subtle); }

/* ── TOC ── */
.toc {
  background: var(--glass-bg-l);
  border: 1px solid var(--glass-border-strong);
  backdrop-filter: blur(40px);
  border-radius: 24px;
  padding: 28px;
  margin-bottom: 48px;
  position: relative;
  overflow: hidden;
}
.toc::before {
  content:''; position:absolute; top:0; left:0; right:0; height:1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}
.toc-title {
  display: flex; align-items: center; gap: 10px;
  font-size: 13px; font-weight: 600;
  color: var(--text-l-subtle);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}
.toc-title::before {
  content:''; width: 24px; height: 1px; background: var(--text-l-subtle);
}
.toc-list { display: flex; flex-direction: column; gap: 4px; }
.toc-item {
  display: flex; align-items: center; gap: 16px;
  padding: 12px 14px;
  border-radius: 12px;
  text-decoration: none;
  color: var(--text-l);
  font-size: 15px;
  transition: all 0.2s;
  cursor: pointer;
  background: none; border: none; width: 100%; text-align: left;
  font-family: inherit;
}
.toc-item:hover {
  background: var(--glass-bg-hover);
  transform: translateX(4px);
}
.toc-num {
  width: 28px; height: 28px;
  border-radius: 8px;
  background: rgba(99,102,241,0.15);
  border: 1px solid rgba(99,102,241,0.3);
  color: var(--accent-soft);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700;
  flex-shrink: 0;
}
body.theme-cyan .toc-num {
  background: rgba(6,182,212,0.15);
  border-color: rgba(6,182,212,0.35);
}
.toc-text { flex: 1; font-weight: 500; }
.toc-time { font-size: 12px; color: var(--text-l-subtle); font-weight: 500; }

/* ── Section (lesson body) ── */
.section {
  background: var(--glass-bg-l);
  border: 1px solid var(--glass-border-strong);
  backdrop-filter: blur(40px);
  border-radius: 28px;
  padding: 44px 36px;
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
  scroll-margin-top: 100px;
}
.section::before {
  content:''; position:absolute; top:0; left:0; right:0; height:1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.15), transparent);
}
.section-header {
  display: flex; align-items: flex-start;
  gap: 18px;
  margin-bottom: 28px;
}
.section-num {
  width: 52px; height: 52px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--accent), var(--accent-hot));
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 20px; color: white;
  flex-shrink: 0;
  box-shadow: 0 12px 28px rgba(99,102,241,0.4);
}
body.theme-cyan .section-num { box-shadow: 0 12px 28px rgba(6,182,212,0.4); }
.section-title {
  font-size: 26px; font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}
.section-subtitle {
  font-size: 14px;
  color: var(--text-l-muted);
}
.section-body {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-l);
}
.section-body p { margin-bottom: 16px; }
.section-body p:last-child { margin-bottom: 0; }
.section-body strong {
  color: var(--accent-soft);
  font-weight: 700;
}
.section-body code {
  background: var(--code-bg);
  border: 1px solid var(--glass-border-strong);
  padding: 2px 8px;
  border-radius: 6px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 14px;
  color: #fbbf24;
}
.section-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 28px 0 14px;
}

/* ── Info boxes ── */
.info-box {
  display: flex; gap: 14px;
  padding: 18px 22px;
  border-radius: 14px;
  margin: 18px 0;
  border-left: 3px solid;
  font-size: 15px;
  line-height: 1.6;
}
.info-box-tip     { background: rgba(245,158,11,0.08); border-color: var(--warning); }
.info-box-warning { background: rgba(239,68,68,0.08);  border-color: var(--error); }
.info-box-success { background: rgba(16,185,129,0.08); border-color: var(--success); }
.info-box-note    { background: rgba(6,182,212,0.08);  border-color: var(--info); }
.info-box-icon    { font-size: 22px; flex-shrink: 0; }
.info-box strong {
  display: block;
  margin-bottom: 4px;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.info-box-tip strong     { color: var(--warning); }
.info-box-warning strong { color: var(--error); }
.info-box-success strong { color: var(--success); }
.info-box-note strong    { color: var(--info); }

/* ── Steps list ── */
.steps-list {
  display: flex; flex-direction: column;
  gap: 10px;
  margin: 22px 0;
}
.step-item {
  display: flex; gap: 14px;
  padding: 18px 20px;
  background: var(--glass-bg-hover);
  border: 1px solid var(--glass-border-strong);
  border-radius: 14px;
}
.step-number {
  width: 30px; height: 30px;
  border-radius: 9px;
  background: rgba(99,102,241,0.15);
  border: 1px solid rgba(99,102,241,0.3);
  color: var(--accent-soft);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
  flex-shrink: 0;
}
body.theme-cyan .step-number {
  background: rgba(6,182,212,0.15);
  border-color: rgba(6,182,212,0.35);
}
.step-content { flex: 1; }
.step-content h4 { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.step-content p  { font-size: 14px; color: var(--text-l-muted); line-height: 1.5; margin: 0; }

/* ── Feature grid ── */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin: 22px 0;
}
.feature-card {
  background: var(--glass-bg-hover);
  border: 1px solid var(--glass-border-strong);
  border-radius: 14px;
  padding: 22px;
  transition: all 0.2s;
}
.feature-card:hover {
  background: rgba(255,255,255,0.06);
  transform: translateY(-2px);
  border-color: rgba(255,255,255,0.2);
}
.feature-icon {
  width: 42px; height: 42px;
  border-radius: 12px;
  background: rgba(99,102,241,0.15);
  border: 1px solid rgba(99,102,241,0.3);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  margin-bottom: 12px;
}
body.theme-cyan .feature-icon {
  background: rgba(6,182,212,0.15);
  border-color: rgba(6,182,212,0.35);
}
.feature-card h4 { font-size: 16px; font-weight: 700; margin-bottom: 4px; }
.feature-card p  { font-size: 14px; color: var(--text-l-muted); line-height: 1.5; margin: 0; }

/* ── Code block ── */
.code-block {
  background: var(--code-bg);
  border: 1px solid var(--glass-border-strong);
  border-radius: 14px;
  margin: 22px 0;
  overflow: hidden;
}
.code-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 16px;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--glass-border-l);
}
.code-lang {
  font-size: 11px;
  font-family: 'JetBrains Mono', monospace;
  color: var(--text-l-subtle);
  font-weight: 600;
}
.code-copy-btn {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--glass-border-strong);
  color: var(--text-l-muted);
  padding: 5px 12px;
  border-radius: 7px;
  font-size: 11px; font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  display: inline-flex; align-items: center; gap: 6px;
}
.code-copy-btn:hover {
  background: rgba(255,255,255,0.1);
  color: var(--text-l);
}
.code-copy-btn.copied {
  background: rgba(16,185,129,0.15);
  border-color: rgba(16,185,129,0.4);
  color: var(--success);
}
.code-content {
  padding: 18px 20px;
  overflow-x: auto;
  font-family: 'JetBrains Mono', monospace;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text-l);
}
.code-content pre { margin: 0; white-space: pre; }
.code-comment  { color: #6b7280; font-style: italic; }
.code-keyword  { color: #c084fc; }
.code-string   { color: #fbbf24; }
.code-function { color: #60a5fa; }
.code-variable { color: #f472b6; }

/* ── Quiz ── */
.quiz-block {
  background: linear-gradient(135deg, rgba(99,102,241,0.08), rgba(168,85,247,0.08));
  border: 1px solid rgba(99,102,241,0.25);
  border-radius: 18px;
  padding: 28px;
  margin: 22px 0;
}
body.theme-cyan .quiz-block {
  background: linear-gradient(135deg, rgba(6,182,212,0.08), rgba(37,99,235,0.08));
  border-color: rgba(6,182,212,0.28);
}
.quiz-label {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12px; font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent-soft);
  margin-bottom: 14px;
}
.quiz-question {
  font-size: 17px; font-weight: 600;
  margin-bottom: 18px;
  line-height: 1.5;
}
.quiz-options {
  display: flex; flex-direction: column; gap: 10px;
}
.quiz-option {
  width: 100%;
  text-align: left;
  padding: 15px 18px;
  background: var(--glass-bg-hover);
  border: 1.5px solid var(--glass-border-strong);
  border-radius: 13px;
  color: var(--text-l);
  font-size: 14.5px;
  font-weight: 500;
  font-family: inherit;
  transition: all 0.2s;
  display: flex; align-items: center; gap: 12px;
  cursor: pointer;
}
.quiz-option:hover:not(:disabled) {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.25);
}
.quiz-option:disabled { cursor: not-allowed; }
.quiz-option.correct   { background: rgba(16,185,129,0.12); border-color: rgba(16,185,129,0.4); color: #6ee7b7; }
.quiz-option.incorrect { background: rgba(239,68,68,0.12); border-color: rgba(239,68,68,0.4); color: #fca5a5; }
.quiz-letter {
  width: 26px; height: 26px;
  border-radius: 8px;
  background: rgba(255,255,255,0.08);
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 700;
  flex-shrink: 0;
}
.correct .quiz-letter   { background: rgba(16,185,129,0.25); }
.incorrect .quiz-letter { background: rgba(239,68,68,0.25); }
.quiz-feedback {
  margin-top: 14px;
  padding: 14px 18px;
  border-radius: 12px;
  font-size: 13.5px;
  line-height: 1.55;
  display: none;
}
.quiz-feedback.show { display: block; animation: lf-fadeIn 0.3s; }
@keyframes lf-fadeIn { from {opacity:0;transform:translateY(-4px);} to {opacity:1;transform:translateY(0);} }

/* ── Next button ── */
.next-btn {
  display: inline-flex; align-items: center; gap: 10px;
  margin-top: 28px;
  padding: 13px 26px;
  background: linear-gradient(135deg, var(--accent), var(--accent-hot));
  border: none;
  border-radius: 12px;
  color: white;
  font-size: 14.5px; font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 8px 24px rgba(99,102,241,0.3);
}
body.theme-cyan .next-btn { box-shadow: 0 8px 24px rgba(6,182,212,0.32); }
.next-btn:hover { transform: translateY(-2px); }
.next-btn-arrow { transition: transform 0.2s; }
.next-btn:hover .next-btn-arrow { transform: translateX(4px); }

/* ── Completion card ── */
.completion-card {
  background: linear-gradient(135deg, rgba(99,102,241,0.12), rgba(168,85,247,0.12));
  border: 1.5px solid rgba(168,85,247,0.3);
  border-radius: 28px;
  padding: 44px 36px;
  text-align: center;
  margin-top: 32px;
  display: none;
  position: relative;
  overflow: hidden;
}
body.theme-cyan .completion-card {
  background: linear-gradient(135deg, rgba(6,182,212,0.12), rgba(37,99,235,0.12));
  border-color: rgba(37,99,235,0.32);
}
.completion-card.show { display: block; animation: lf-fadeIn 0.6s; }
.completion-card::before {
  content:''; position:absolute; top:0; left:0; right:0; height:1px;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
}
.completion-emoji { font-size: 56px; margin-bottom: 18px; }
.completion-title {
  font-size: 30px; font-weight: 800; margin-bottom: 10px;
}
.completion-text {
  font-size: 15.5px; color: var(--text-l-muted);
  margin-bottom: 28px;
  max-width: 500px;
  margin-left: auto; margin-right: auto;
  line-height: 1.6;
}
.completion-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  max-width: 460px;
  margin: 0 auto 28px;
}
.completion-stat {
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--glass-border-strong);
  border-radius: 13px;
  padding: 18px 12px;
}
.completion-stat-num {
  font-size: 26px; font-weight: 800;
  background: linear-gradient(135deg, var(--accent-soft), var(--accent-hot));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.completion-stat-label { font-size: 12px; color: var(--text-l-muted); margin-top: 4px; }
.completion-actions {
  display: flex; gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ── Locked-lesson notice ── */
.locked-notice {
  background: var(--glass-bg-l);
  border: 1px dashed var(--glass-border-strong);
  border-radius: 24px;
  padding: 56px 36px;
  text-align: center;
  margin: 32px 0;
}
.locked-notice .lock-icon {
  font-size: 48px; margin-bottom: 16px;
  opacity: 0.6;
}
.locked-notice h2 {
  font-size: 28px; font-weight: 800;
  margin-bottom: 10px;
  letter-spacing: -0.02em;
}
.locked-notice p {
  font-size: 15px;
  color: var(--text-l-muted);
  max-width: 460px;
  margin: 0 auto 22px;
  line-height: 1.6;
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .lesson-wrapper { padding: 24px 14px 80px; }
  .lesson-nav     { padding: 10px 14px; }
  .lesson-nav .nav-progress span:first-child { display: none; }
  .nav-progress-bar { width: 80px; }
  .lesson-title, .catalog-title, .course-hero-title { font-size: 36px; }
  .lesson-subtitle, .catalog-subtitle { font-size: 16px; }
  .section, .course-hero { padding: 28px 22px; }
  .section-title { font-size: 22px; }
  .section-num { width: 44px; height: 44px; font-size: 17px; }
  .feature-grid, .courses-grid, .completion-stats, .service-block {
    grid-template-columns: 1fr;
  }
  .completion-title { font-size: 22px; }
  .lesson-row {
    grid-template-columns: 38px 1fr;
    gap: 12px;
  }
  .lesson-row .lr-time, .lesson-row .lr-status { display: none; }
}

/* ════════════════════════════════════════════
   ADDITIONAL COURSE THEMES
   (orange/green/purple/amber/pink/red)
══════════════════════════════════════════════ */

/* ── Orange (n8n) ── */
body.theme-orange {
  --accent:      #f97316;
  --accent-soft: #fdba74;
  --accent-hot:  #ea580c;
}
.course-card.theme-orange {
  background: linear-gradient(160deg, rgba(249,115,22,0.10), rgba(234,88,12,0.05) 60%, transparent);
}
.course-card.theme-orange .course-card-icon {
  background: linear-gradient(135deg, #f97316, #ea580c);
  box-shadow: 0 12px 28px rgba(249,115,22,0.4);
}

/* ── Green (SEO) ── */
body.theme-green {
  --accent:      #10b981;
  --accent-soft: #6ee7b7;
  --accent-hot:  #047857;
}
.course-card.theme-green {
  background: linear-gradient(160deg, rgba(16,185,129,0.10), rgba(4,120,87,0.05) 60%, transparent);
}
.course-card.theme-green .course-card-icon {
  background: linear-gradient(135deg, #10b981, #047857);
  box-shadow: 0 12px 28px rgba(16,185,129,0.4);
}

/* ── Purple (Vibecoding) ── */
body.theme-purple {
  --accent:      #a855f7;
  --accent-soft: #c4b5fd;
  --accent-hot:  #7c3aed;
}
.course-card.theme-purple {
  background: linear-gradient(160deg, rgba(168,85,247,0.10), rgba(124,58,237,0.05) 60%, transparent);
}
.course-card.theme-purple .course-card-icon {
  background: linear-gradient(135deg, #a855f7, #7c3aed);
  box-shadow: 0 12px 28px rgba(168,85,247,0.4);
}

/* ── Amber (Soft Skills) ── */
body.theme-amber {
  --accent:      #f59e0b;
  --accent-soft: #fcd34d;
  --accent-hot:  #d97706;
}
.course-card.theme-amber {
  background: linear-gradient(160deg, rgba(245,158,11,0.10), rgba(217,119,6,0.05) 60%, transparent);
}
.course-card.theme-amber .course-card-icon {
  background: linear-gradient(135deg, #f59e0b, #d97706);
  box-shadow: 0 12px 28px rgba(245,158,11,0.4);
}

/* ── Pink (TikTok) ── */
body.theme-pink {
  --accent:      #ec4899;
  --accent-soft: #f9a8d4;
  --accent-hot:  #db2777;
}
.course-card.theme-pink {
  background: linear-gradient(160deg, rgba(236,72,153,0.10), rgba(219,39,119,0.05) 60%, transparent);
}
.course-card.theme-pink .course-card-icon {
  background: linear-gradient(135deg, #ec4899, #db2777);
  box-shadow: 0 12px 28px rgba(236,72,153,0.4);
}

/* ── Red (Freelancer) ── */
body.theme-red {
  --accent:      #ef4444;
  --accent-soft: #fca5a5;
  --accent-hot:  #b91c1c;
}
.course-card.theme-red {
  background: linear-gradient(160deg, rgba(239,68,68,0.10), rgba(185,28,28,0.05) 60%, transparent);
}
.course-card.theme-red .course-card-icon {
  background: linear-gradient(135deg, #ef4444, #b91c1c);
  box-shadow: 0 12px 28px rgba(239,68,68,0.4);
}

/* ═══════════════════════════════════════
   PAYMENT SECTION (AutoBanking)
═══════════════════════════════════════ */
.payment-section {
  background: var(--glass-bg-l);
  border: 1px solid var(--glass-border-strong);
  backdrop-filter: blur(40px);
  border-radius: 24px;
  overflow: hidden;
  margin-bottom: 32px;
}
.payment-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 18px 28px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--accent-soft);
  border-bottom: 1px solid var(--glass-border-l);
  background: rgba(255,255,255,0.02);
}
.payment-header svg { stroke: var(--accent-soft); }
.payment-body {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  padding: 28px;
  align-items: start;
}
.payment-info {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.payment-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
}
.payment-label {
  font-family: 'JetBrains Mono', monospace;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-l-subtle);
  flex-shrink: 0;
  min-width: 110px;
}
.payment-value {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-l);
}
.payment-note {
  margin-top: 8px;
  padding: 12px 16px;
  background: rgba(251,191,36,0.06);
  border: 1px solid rgba(251,191,36,0.2);
  border-radius: 12px;
  font-size: 13px;
  color: rgba(251,191,36,0.9);
  line-height: 1.5;
}
.payment-qr {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}
.qr-img {
  width: 200px;
  height: auto;
  border-radius: 12px;
  border: 1px solid var(--glass-border-strong);
}
.qr-caption {
  font-family: 'JetBrains Mono', monospace;
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-l-subtle);
  text-align: center;
}

@media (max-width: 700px) {
  .payment-body {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .payment-qr { align-items: center; }
  .payment-row { flex-direction: column; gap: 4px; }
  .payment-label { min-width: auto; }
}

/* ═══════════════════════════════════════
   STICKY MOBILE CTA BAR
═══════════════════════════════════════ */
.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  background: rgba(10,10,15,0.92);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-top: 1px solid var(--glass-border-strong);
  box-shadow: 0 -8px 32px rgba(0,0,0,0.5);
}
.sticky-cta-price {
  font-size: 22px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent-soft), var(--accent-hot));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.sticky-cta-price small {
  font-size: 11px;
  font-weight: 500;
  -webkit-text-fill-color: var(--text-l-subtle);
}
.sticky-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  background: linear-gradient(135deg, var(--accent), var(--accent-hot));
  border-radius: 10px;
  color: white;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
  box-shadow: 0 4px 16px rgba(99,102,241,0.3);
}

@media (max-width: 700px) {
  .sticky-cta { display: flex; }
  .lesson-wrapper { padding-bottom: 80px; }
}