/* === Reset & Base === */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-bg: #ffffff;
  --color-surface: #f6f7f9;
  --color-surface-hover: #eceef2;
  --color-border: #e2e5ea;
  --color-text: #1a1d27;
  --color-text-muted: #6b7280;
  --color-accent: #c74634;
  --color-accent-hover: #e0553f;
  --color-subscribe: #c74634;
  --color-subscribe-hover: #e0553f;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

/* === Top Bar === */
.top-bar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.top-bar-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.logo-img {
  height: 40px;
  width: auto;
}

/* === Nav Playlists === */
.nav-playlists {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  overflow-x: auto;
  scrollbar-width: none;
}

.nav-playlists::-webkit-scrollbar {
  display: none;
}

.nav-playlists a {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  white-space: nowrap;
  transition: all 0.2s;
}

.nav-playlists a:hover {
  color: var(--color-text);
  background: var(--color-surface);
}

.nav-playlists a.active {
  color: var(--color-text);
  background: var(--color-surface);
}

/* === Course Nav Link === */
.nav-course-link {
  flex-shrink: 0;
  padding: 8px 16px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  white-space: nowrap;
  transition: all 0.2s;
}

.nav-course-link:hover {
  background: var(--color-accent);
  color: #fff;
}

.nav-mobile-course-link {
  margin-top: 8px;
  padding: 12px 0;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-accent);
}

/* === Hamburger (mobile) === */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  margin-left: auto;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s;
}

.hamburger.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.open span:nth-child(2) {
  opacity: 0;
}

.hamburger.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile nav */
.nav-mobile {
  display: none;
  flex-direction: column;
  padding: 8px 24px 16px;
  border-top: 1px solid var(--color-border);
}

.nav-mobile.open {
  display: flex;
}

.nav-mobile a {
  padding: 12px 0;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
  transition: color 0.2s;
}

.nav-mobile a:last-child {
  border-bottom: none;
}

.nav-mobile a:hover,
.nav-mobile a.active {
  color: var(--color-text);
}

/* === Subscribe Button === */
.btn-subscribe {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: var(--color-subscribe);
  color: #fff;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 600;
  white-space: nowrap;
  transition: all 0.2s;
  flex-shrink: 0;
}

.btn-subscribe:hover {
  background: var(--color-subscribe-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(199, 70, 52, 0.4);
}

/* === Hero === */
.hero {
  background: linear-gradient(135deg, var(--color-surface) 0%, var(--color-bg) 100%);
  border-bottom: 1px solid var(--color-border);
  padding: 60px 24px;
  text-align: center;
}

.hero-inner {
  max-width: 700px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.hero p {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.hero-tagline {
  font-size: 1rem;
  color: var(--color-accent) !important;
  font-weight: 600;
}

/* === SEO Content Section === */
.seo-content {
  padding: 56px 24px;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
  text-align: center;
}

.seo-content-inner {
  max-width: 1280px;
  margin: 0 auto;
}

.seo-content h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.seo-content > .seo-content-inner > p {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  line-height: 1.8;
  margin-bottom: 36px;
  max-width: 780px;
  margin-left: auto;
  margin-right: auto;
}

.seo-topics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.seo-topic {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
}

.seo-topic h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--color-accent);
  text-align: left;
}

.seo-topic p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.6;
  text-align: left;
}

/* === Course Promo Banner === */
.course-promo {
  background: linear-gradient(135deg, var(--color-accent) 0%, #a83a2b 100%);
  padding: 28px 24px;
}

.course-promo-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.course-promo-badge {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 8px;
}

.course-promo-text h2 {
  color: #fff;
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.course-promo-text p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 0.9rem;
}

.course-promo-cta {
  display: inline-block;
  flex-shrink: 0;
  background: #fff;
  color: var(--color-accent);
  padding: 12px 28px;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 700;
  white-space: nowrap;
  transition: all 0.2s;
}

.course-promo-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
}

/* === Training Section === */
.training-section {
  padding: 56px 24px;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.training-inner {
  max-width: 1280px;
  margin: 0 auto;
}

.training-section h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.training-subtitle {
  color: var(--color-text-muted);
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 640px;
  margin: 0 auto 36px;
}

.training-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.training-card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 28px;
  text-align: left;
  transition: border-color 0.25s;
}

.training-card:hover {
  border-color: var(--color-accent);
}

.training-card-icon {
  color: var(--color-accent);
  margin-bottom: 16px;
}

.training-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.training-card-desc {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 16px;
}

.training-card ul {
  list-style: none;
  margin-bottom: 24px;
}

.training-card ul li {
  position: relative;
  padding-left: 20px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.training-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
}

.training-cta {
  display: inline-block;
  align-self: flex-start;
  margin-top: auto;
  padding: 10px 28px;
  background: var(--color-accent);
  color: #fff;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.2s;
}

.training-cta:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(199, 70, 52, 0.4);
}

/* === Playlist Header === */
.playlist-header {
  padding: 40px 24px 0;
  scroll-margin-top: 80px;
}

.playlist-header-inner {
  max-width: 1280px;
  margin: 0 auto;
}

.playlist-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.playlist-header p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
}

/* === Video Grid === */
.video-grid-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 32px 24px 60px;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

/* === Video Card === */
.video-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.25s;
  cursor: pointer;
}

.video-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.video-card-thumbnail {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: var(--color-surface-hover);
  overflow: hidden;
}

.video-card-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s;
}

.video-card:hover .video-card-thumbnail img {
  transform: scale(1.05);
}

.video-card-thumbnail .play-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.3);
  opacity: 0;
  transition: opacity 0.25s;
}

.video-card:hover .play-overlay {
  opacity: 1;
}

.play-overlay svg {
  width: 56px;
  height: 56px;
  fill: #fff;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.5));
}

.video-card-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
}

.video-card-body {
  padding: 16px;
}

.video-card-title {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-card-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}

.video-card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.video-card-meta .playlist-tag {
  background: rgba(199, 70, 52, 0.15);
  color: var(--color-accent);
  padding: 2px 8px;
  border-radius: 4px;
  font-weight: 500;
}

/* === No Videos === */
.no-videos {
  text-align: center;
  padding: 60px 24px;
  color: var(--color-text-muted);
  font-size: 1.1rem;
}

/* === Footer === */
.footer {
  border-top: 1px solid var(--color-border);
  padding: 24px;
}

.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.footer-links a {
  color: var(--color-accent);
  font-weight: 500;
}

.footer-links a:hover {
  text-decoration: underline;
}


/* === Course Landing Page === */
.top-bar-course .top-bar-inner {
  justify-content: space-between;
}

.back-link {
  padding: 8px 12px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color 0.2s;
}

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

.course-hero-badge {
  display: inline-block;
  background: var(--color-accent);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.course-hero-facts {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin: 24px 0 28px;
}

.course-hero-fact {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px 16px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text);
}

.course-hero-cta {
  display: inline-block;
  padding: 14px 36px;
  background: var(--color-accent);
  color: #fff;
  border-radius: 8px;
  font-size: 1.05rem;
  font-weight: 700;
  transition: all 0.2s;
}

.course-hero-cta:hover {
  background: var(--color-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(199, 70, 52, 0.35);
}

.course-hero-note {
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

.course-highlights-grid {
  grid-template-columns: repeat(4, 1fr);
}

/* Curriculum */
.course-curriculum {
  padding: 56px 24px;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.course-curriculum-inner {
  max-width: 900px;
  margin: 0 auto;
}

.course-curriculum h2 {
  font-size: 1.75rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
}

.course-curriculum-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 1rem;
  margin-bottom: 36px;
}

.curriculum-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.curriculum-day {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px 28px;
  transition: border-color 0.25s;
}

.curriculum-day:hover {
  border-color: var(--color-accent);
}

.curriculum-day-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}

.curriculum-day-num {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 0.95rem;
}

.curriculum-day-header h3 {
  font-size: 1.1rem;
  font-weight: 700;
}

.curriculum-day-topics {
  list-style: none;
  margin: 0 0 14px 50px;
}

.curriculum-day-topics li {
  position: relative;
  padding-left: 18px;
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

.curriculum-day-topics li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

.curriculum-day-handson {
  margin-left: 50px;
  font-size: 0.85rem;
  color: var(--color-accent);
  font-weight: 600;
}

/* Pricing / Reserve card */
.course-pricing-section {
  padding: 56px 24px;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.course-pricing-card {
  max-width: 480px;
  margin: 0 auto;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px 32px;
}

.course-pricing-badge {
  display: inline-block;
  background: rgba(199, 70, 52, 0.12);
  color: var(--color-accent);
  font-size: 0.8rem;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: 16px;
  margin-bottom: 16px;
}

.course-price {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 4px;
}

.course-price span {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-muted);
}

.course-pricing-card p.course-price-desc {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-bottom: 24px;
}

/* Lead form */
.course-form-section {
  padding: 56px 24px;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  text-align: center;
}

.course-form-card {
  max-width: 560px;
  margin: 0 auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px 32px;
}

.course-form-card h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.course-form-card p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  margin-bottom: 24px;
}

.course-form-embed iframe {
  width: 100%;
  min-height: 600px;
  border: none;
}

/* FAQ */
.course-faq {
  padding: 56px 24px;
  background: var(--color-surface);
}

.course-faq-inner {
  max-width: 760px;
  margin: 0 auto;
}

.course-faq h2 {
  font-size: 1.75rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 36px;
}

.course-faq-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

.course-faq-item:last-child {
  border-bottom: none;
}

.course-faq-item h3 {
  font-size: 1.02rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.course-faq-item p {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

/* === Course Hub === */
.course-hub {
  padding: 56px 24px;
  background: var(--color-bg);
}

.course-hub-inner {
  max-width: 1000px;
  margin: 0 auto;
}

.course-hub-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.course-hub-card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: border-color 0.25s;
}

.course-hub-card:hover {
  border-color: var(--color-accent);
}

.course-hub-card h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.course-hub-desc {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  line-height: 1.6;
  margin-bottom: 18px;
}

.course-hub-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.course-hub-card .course-hero-cta {
  align-self: flex-start;
  margin-top: auto;
}

/* === Responsive === */
@media (max-width: 768px) {
  .nav-playlists {
    display: none;
  }

  .nav-course-link {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .course-promo-inner {
    justify-content: center;
    text-align: center;
  }

  .top-bar-inner {
    gap: 16px;
  }

  .hero {
    padding: 40px 20px;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .seo-topics {
    grid-template-columns: 1fr;
  }

  .training-cards {
    grid-template-columns: 1fr;
  }

  .video-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .footer-inner {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .course-promo-text h2 {
    font-size: 1.15rem;
  }

  .curriculum-day-topics,
  .curriculum-day-handson {
    margin-left: 0;
  }

  .course-pricing-card,
  .course-form-card {
    padding: 28px 20px;
  }

  .course-hub-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .btn-subscribe span {
    display: none;
  }
}