/**
 * ---
 * Project      : Coding Campus Platform
 * Module       : Static / Css
 * File         : ai_course_detail.css
 *
 * Description  : Project css source for Ai Course Detail.
 *
 * Author       : Jihun Kang
 * Organization : Coding Campus / OrbiSync
 * Contact      : makers.dev.ci@gmail.com
 *
 * Copyright (c) 2026 Jihun Kang. All rights reserved.
 * ---
 */
:root {
  --cs-primary: #2563eb;
  --cs-primary-deep: #1d4ed8;
  --cs-accent: #ff654f;
  --cs-text: #111827;
  --cs-muted: #6b7280;
  --cs-radius: 18px;
  --ai-detail-section-gap: 40px;
  --ai-detail-container: 1180px;
}

.course-detail-page.course-sales.ai-course-detail {
  max-width: var(--ai-detail-container);
  margin: 0 auto;
  padding: 0 24px 96px;
  overflow-x: clip;
}

.ai-course-detail .cs-container {
  max-width: 100%;
  margin: 0 auto;
  padding: 0;
}

.ai-course-detail .cs-hero {
  padding: 108px 0 36px;
  background: linear-gradient(135deg, #f8fbff 0%, #eef6ff 100%);
  color: var(--cs-text);
  position: relative;
  overflow: hidden;
  border-radius: 24px;
  margin-top: 8px;
}

.ai-course-detail .cs-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 28px;
  align-items: center;
}

.ai-course-detail .cs-hero-left,
.ai-course-detail .cs-hero-right,
.ai-course-detail .cs-main-content {
  min-width: 0;
}

.ai-course-detail .cs-badge {
  display: inline-block;
  background: #dbeafe;
  color: #1e3a8a;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.ai-course-detail .cs-badge-soft {
  margin-left: 8px;
  background: #eff6ff;
  color: #2563eb;
}

.ai-course-detail .cs-hero-title {
  margin: 12px 0 8px;
  color: var(--cs-text);
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.15;
  font-weight: 900;
  letter-spacing: -0.03em;
}

.ai-course-detail .ai-course-subtitle {
  margin: 0 0 12px;
  color: #374151;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.45;
}

.ai-course-detail .cs-hero-desc {
  margin: 0;
  color: #4b5563;
  font-size: 16px;
  line-height: 1.65;
  max-width: 560px;
}

.ai-course-detail .cs-meta-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  width: 100%;
  max-width: 560px;
  margin-top: 20px;
  background: #fff;
  border: 1px solid #dbeafe;
  border-radius: 12px;
  overflow: hidden;
}

.ai-course-detail .cs-meta-row > div {
  padding: 9px 10px;
  min-width: 0;
  border-right: 1px solid #e5edff;
}

.ai-course-detail .cs-meta-row > div:last-child {
  border-right: 0;
}

.ai-course-detail .cs-meta-row span {
  display: block;
  margin-bottom: 2px;
  color: #64748b;
  font-size: 11px;
  font-weight: 700;
}

.ai-course-detail .cs-meta-row strong {
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
  color: #0f172a;
  font-size: 13px;
  font-weight: 800;
  line-height: 1.35;
  word-break: keep-all;
}

.ai-course-detail .cs-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 22px;
  border-radius: 12px;
  border: 0;
  font-size: 15px;
  font-weight: 800;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.ai-course-detail .cs-btn-primary {
  background: var(--cs-accent);
  color: #fff;
  box-shadow: 0 10px 18px rgba(255, 101, 79, 0.24);
}

.ai-course-detail .cs-btn-primary:hover {
  transform: translateY(-1px);
}

.ai-course-detail .cs-btn-ghost {
  background: #fff;
  color: #1e3a8a;
  border: 1px solid #cbd5e1;
}

.ai-course-detail .cs-btn-ghost:hover {
  background: #eff6ff;
}

.ai-course-detail .cs-btn-sample {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: #fff;
  border: 0;
  box-shadow: 0 10px 22px rgba(37, 99, 235, 0.28);
}

.ai-course-detail .cs-btn-sample:hover,
.ai-course-detail .cs-btn-sample:focus-visible {
  background: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
  color: #fff;
  transform: translateY(-1px);
}

.ai-course-detail .cs-hero-right {
  width: 100%;
  max-width: none;
}

.ai-course-detail .cs-hero-media-card {
  width: 100%;
  max-width: none;
  background: #fff;
  border: 1px solid #dbeafe;
  border-radius: 24px;
  padding: 0;
  overflow: hidden;
  box-shadow: 0 14px 36px rgba(37, 99, 235, 0.12);
}

.ai-course-detail .cs-ratio {
  position: relative;
  overflow: hidden;
  border-radius: inherit;
  background: #eff6ff;
  aspect-ratio: 16 / 9;
  max-height: 360px;
}

.ai-course-detail .course-hero-image-card {
  width: 100%;
  max-width: none;
  min-height: 340px;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: 24px;
  max-height: none;
}

.ai-course-detail .course-hero-image-card img,
.ai-course-detail .course-hero-image {
  width: 100%;
  height: 100%;
  max-height: none;
  object-fit: cover;
  object-position: center;
  display: block;
}

.ai-course-detail .course-hero-image-card[data-fit="contain"] .course-hero-image,
.ai-course-detail .course-hero-image[data-fit="contain"] {
  object-fit: contain;
}

.ai-course-detail .course-hero-image-card[data-fit="fill"] .course-hero-image,
.ai-course-detail .course-hero-image[data-fit="fill"] {
  object-fit: fill;
}

.ai-course-detail .cs-ratio img,
.ai-course-detail .cs-ratio video,
.ai-course-detail .cs-ratio iframe {
  display: block;
  width: 100%;
  height: 100%;
  max-height: 360px;
  border: 0;
}

.ai-course-detail .cs-ratio img:not(.course-hero-image),
.ai-course-detail .cs-ratio video {
  object-fit: cover;
}

.ai-course-detail .cs-empty-media {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 180px;
  color: #64748b;
  font-weight: 700;
}

.ai-course-detail .cs-section {
  padding: 32px 0 0;
  background: transparent;
}

.ai-course-detail .cs-section-title {
  margin: 0 0 12px;
  color: var(--cs-text);
  font-size: 26px;
  font-weight: 900;
  line-height: 1.25;
}

.ai-course-detail .cs-section-title.left {
  text-align: left;
}

.ai-course-detail .cs-main-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 300px);
  gap: 32px;
  align-items: start;
}

.ai-course-detail-section {
  margin-bottom: var(--ai-detail-section-gap);
}

.ai-course-detail-section:last-child {
  margin-bottom: 0;
}

.ai-course-detail .cs-learn-section {
  padding: 0;
}

.ai-course-detail .cs-learn-card {
  padding: 24px 26px;
  border: 1px solid #e5e7eb;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.06);
}

.ai-course-detail .cs-learn-description {
  color: #4b5563;
  line-height: 1.75;
  font-size: 15px;
}

.ai-course-detail .cs-curriculum-block {
  margin-top: 0;
  padding: 24px 26px;
  border: 1px solid #e5e7eb;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.05);
}

.ai-course-detail .cs-pay-sticky {
  position: sticky;
  top: 96px;
  align-self: start;
  width: 100%;
  padding: 22px 20px 20px;
  border: 1px solid #dbeafe;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 12px 28px rgba(37, 99, 235, 0.1);
}

.ai-course-detail .cs-pay-price-block {
  margin-bottom: 0;
}

.ai-course-detail .cs-pay-label {
  margin: 0 0 6px;
  color: #64748b;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.2;
}

.ai-course-detail .cs-pay-sale-price {
  margin: 0;
  color: #0f172a;
  font-size: 32px;
  font-weight: 900;
  line-height: 1.1;
}

.ai-course-detail .cs-pay-original {
  margin: 8px 0 0;
  color: #94a3b8;
  font-size: 15px;
  line-height: 1.2;
  text-decoration: line-through;
}

.ai-course-detail .cs-pay-discount-badge {
  display: inline-block;
  margin: 8px 0 0;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--cs-accent);
  color: #fff;
  font-size: 12px;
  font-weight: 800;
  line-height: 1.2;
}

.ai-course-detail .cs-pay-actions {
  margin-top: 22px;
}

.ai-course-detail .cs-pay-actions .cs-btn {
  width: 100%;
  min-height: 52px;
  height: 52px;
  margin: 0;
  border-radius: 13px;
  padding: 0 20px;
}

.ai-course-detail .cs-pay-actions .cs-btn--disabled {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

.ai-course-detail .cs-pay-sample-hint {
  margin: 14px 0 0;
  color: #64748b;
  font-size: 12px;
  line-height: 1.55;
  text-align: center;
}

.ai-course-detail .cs-pay-sample-link {
  color: #2563eb;
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.ai-course-detail .cs-pay-sample-link:hover,
.ai-course-detail .cs-pay-sample-link:focus-visible {
  color: #1d4ed8;
}

.ai-course-detail .cs-pay-benefits {
  margin: 16px 0 0;
  padding: 12px 14px 12px 28px;
  border-radius: 12px;
  background: #f8fafc;
  color: #475569;
  font-size: 12px;
  line-height: 1.55;
  list-style: disc;
}

.ai-course-detail .cs-pay-benefits li {
  margin-bottom: 6px;
}

.ai-course-detail .cs-pay-benefits li:last-child {
  margin-bottom: 0;
}

.course-detail-visual-sections {
  display: flex;
  flex-direction: column;
  gap: 48px;
  width: 100%;
  margin-bottom: var(--ai-detail-section-gap, 40px);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.course-detail-visual-block {
  display: flex;
  flex-direction: column;
  gap: 18px;
  width: 100%;
  padding: 28px 28px 24px;
  border: 1px solid #dbeafe;
  border-radius: 22px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fbff 100%);
  box-shadow: 0 14px 36px rgba(37, 99, 235, 0.08);
}

.course-detail-visual-copy {
  width: 100%;
  max-width: 680px;
  margin: 0 auto;
  text-align: center;
}

.course-detail-visual-eyebrow {
  margin: 0 0 10px;
  color: #2563eb;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.course-detail-visual-title {
  margin: 0 0 14px;
  color: #0f172a;
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -0.02em;
  word-break: keep-all;
}

.course-detail-visual-description {
  margin: 0;
  color: #4b5563;
  font-size: 16px;
  line-height: 1.7;
}

.course-detail-visual-description + .course-detail-visual-description {
  margin-top: 10px;
}

.course-detail-visual-media {
  width: 100%;
  margin: 0;
}

.course-detail-visual-media__image {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  margin: 0 auto;
  border-radius: 16px;
  border: 1px solid #e5eefb;
  background: #ffffff;
  box-shadow: 0 10px 28px rgba(15, 23, 42, 0.06);
  object-fit: contain;
  object-position: center;
}

.course-detail-visual-media__image[data-fit="contain"] {
  object-fit: contain;
  background: #ffffff;
}

.course-detail-visual-media__image[data-fit="fill"] {
  object-fit: fill;
}

.course-detail-visual-media__image[data-fit="cover"] {
  object-fit: cover;
}

.ai-course-info-section {
  margin-top: 0;
  margin-bottom: var(--ai-detail-section-gap);
}

.ai-course-info-section:last-child {
  margin-bottom: 0;
}

.ai-course-info-card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  align-items: stretch;
  width: 100%;
  max-width: 100%;
}

.ai-course-info-card-grid[data-card-count="2"] {
  max-width: 100%;
}

.ai-course-info-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  min-height: 132px;
  padding: 18px 20px 16px;
  border: 1px solid #e5e7eb;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
}

.ai-course-info-card__title {
  margin: 0 0 8px;
  color: #0f172a;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.45;
}

.ai-course-info-card__body {
  margin: 0;
  flex: 1;
  color: #4b5563;
  font-size: 14px;
  line-height: 1.65;
}

.ai-course-info-card--summary {
  min-height: auto;
  max-width: 100%;
}

.ai-course-info-section--summary .ai-course-info-card-grid {
  grid-template-columns: 1fr;
}

@media (max-width: 768px) {
  .ai-course-info-card-grid {
    grid-template-columns: 1fr;
  }

  .ai-course-info-card {
    min-height: 0;
    padding: 16px 18px 14px;
  }

  .ai-course-info-card__title {
    font-size: 15px;
  }

  .ai-course-info-card__body {
    font-size: 14px;
    line-height: 1.6;
  }
}

@media (min-width: 769px) {
  .ai-course-info-card-grid[data-card-count="2"],
  .ai-course-info-card-grid[data-card-count="4"] {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .ai-course-info-card-grid[data-card-count="4"] .ai-course-info-card {
    min-height: 140px;
  }
}

.ai-course-sales-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  align-items: stretch;
}

.ai-course-sales-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 22px 22px 20px;
  border: 1px solid #e5e7eb;
  border-radius: var(--cs-radius);
  background: #fff;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.04);
}

.ai-course-sales-card--wide {
  grid-column: 1 / -1;
}

.ai-course-sales-card .cs-section-title {
  margin-bottom: 12px;
  font-size: 20px;
}

.ai-course-sales-card p {
  margin: 0;
  color: #4b5563;
  line-height: 1.7;
}

.ai-course-sales-list {
  margin: 0;
  padding-left: 18px;
  color: #374151;
  line-height: 1.75;
}

.ai-course-sales-list li + li {
  margin-top: 8px;
}

.ai-course-detail .cs-pay-price-note {
  margin: 16px 0 0;
  padding: 10px 12px;
  border-radius: 12px;
  background: #fff7ed;
  border: 1px solid #fed7aa;
  color: #9a3412;
  font-size: 12px;
  line-height: 1.55;
  font-weight: 700;
}

.ai-course-detail .cs-catalog-notice {
  margin: 12px 0 0;
  padding: 14px 18px;
  border-radius: 12px;
  background: #fff7ed;
  border: 1px solid #fed7aa;
  color: #9a3412;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
}

.ai-course-detail .cs-catalog-notice p {
  margin: 0;
}

.ai-course-detail .cs-btn--disabled {
  opacity: 0.65;
  cursor: not-allowed;
  pointer-events: none;
}

.ai-course-detail .ai-course-result-preview {
  margin-bottom: 0;
}

.ai-course-detail .ai-course-result-preview-lead {
  margin: 0 0 16px;
  color: #475569;
  font-size: 15px;
  line-height: 1.65;
}

.ai-course-detail .ai-course-result-preview-placeholder {
  margin: 0;
  padding: 28px 20px;
  border-radius: 14px;
  background: #f8fafc;
  border: 1px dashed #cbd5e1;
  color: #64748b;
  text-align: center;
  font-size: 15px;
}

.ai-course-detail .ai-course-result-preview-player {
  position: relative;
  width: 100%;
  max-width: 100%;
  border-radius: 14px;
  overflow: hidden;
  background: #0f172a;
  aspect-ratio: 16 / 9;
}

.ai-course-detail .ai-course-result-preview-player iframe,
.ai-course-detail .ai-course-result-preview-player video,
.ai-course-detail .course-preview-video {
  display: block;
  width: 100%;
  max-width: 100%;
  height: 100%;
  border: 0;
  object-fit: contain;
}

@media (prefers-reduced-motion: reduce) {
  .ai-course-detail .course-preview-video[poster] {
    object-fit: cover;
  }
}

.ai-course-detail .cs-hero-poster-fallback {
  object-fit: cover;
}

.ai-game-practice-guide__list {
  margin: 0.75rem 0 1rem;
  padding-left: 1.25rem;
  line-height: 1.7;
}

.ai-game-practice-guide .cs-learn-text p,
.ai-game-sample-guide .cs-learn-text p {
  margin: 0;
  line-height: 1.75;
  color: #334155;
}

.ai-course-samples-intro {
  margin: 0 0 18px;
  color: #475569;
  font-size: 14px;
  line-height: 1.65;
}

.ai-course-sample-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.ai-course-sample-card,
.ai-course-empty {
  border: 1px solid #e5e7eb;
  border-radius: 18px;
  background: #fff;
  padding: 22px 24px;
  box-shadow: 0 12px 28px rgba(15, 23, 42, 0.08);
}

a.ai-course-sample-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-height: 180px;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, transform 0.15s ease;
}

a.ai-course-sample-card:hover,
a.ai-course-sample-card:focus-visible {
  border-color: #93c5fd;
  box-shadow: 0 16px 32px rgba(37, 99, 235, 0.14);
  transform: translateY(-1px);
}

.ai-course-sample-card__meta,
.ai-course-lesson-cta--sample {
  color: #2563eb;
  font-size: 12px;
  font-weight: 900;
}

.ai-course-lesson-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 900;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.ai-course-sample-card .ai-course-lesson-cta--sample {
  margin-top: auto;
  align-self: flex-start;
  border: 1px solid #bfdbfe;
  background: #eff6ff;
}

.ai-course-lesson-cta--play {
  border: 1px solid #bfdbfe;
  background: #eff6ff;
  color: #1d4ed8;
}

.ai-course-lesson-cta--play:hover,
.ai-course-lesson-cta--play:focus-visible {
  background: #dbeafe;
  color: #1e3a8a;
}

.ai-course-lesson-cta--locked {
  border: 1px solid #e5e7eb;
  background: #f8fafc;
  color: #64748b;
}

.ai-course-lesson-cta--locked:hover,
.ai-course-lesson-cta--locked:focus-visible {
  border-color: #cbd5e1;
  color: #334155;
}

.ai-course-sample-card h3 {
  margin: 0;
  color: #111827;
  font-size: 20px;
  font-weight: 850;
  line-height: 1.35;
}

.ai-course-sample-card p,
.ai-course-lesson-item p {
  margin: 0;
  color: #6b7280;
  line-height: 1.6;
}

.ai-course-curriculum {
  scroll-margin-top: 108px;
}

.ai-course-curriculum__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 4px;
}

.ai-course-curriculum__head .cs-section-title {
  margin-bottom: 0;
}

.ai-course-curriculum__toggle-all {
  flex-shrink: 0;
  padding: 8px 14px;
  border: 1px solid #dbeafe;
  border-radius: 999px;
  background: #fff;
  color: #2563eb;
  font-size: 13px;
  font-weight: 800;
  line-height: 1.2;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.ai-course-curriculum__toggle-all:hover,
.ai-course-curriculum__toggle-all:focus-visible {
  background: #eff6ff;
  border-color: #93c5fd;
  color: #1d4ed8;
  outline: none;
}

.ai-course-curriculum__summary {
  margin: 0 0 16px;
  color: #64748b;
  font-size: 14px;
  font-weight: 700;
  line-height: 1.5;
}

.ai-course-curriculum-accordion {
  display: grid;
  gap: 12px;
}

.ai-course-curriculum-section {
  border: 1px solid #e5e7eb;
  border-radius: 18px;
  background: #fff;
  box-shadow: 0 8px 22px rgba(15, 23, 42, 0.05);
  overflow: hidden;
}

.ai-course-curriculum-section__header {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 10px 14px;
  width: 100%;
  padding: 18px 20px;
  border: 0;
  background: #fff;
  text-align: left;
  cursor: pointer;
  transition: background 0.15s ease;
}

.ai-course-curriculum-section__header:hover,
.ai-course-curriculum-section__header:focus-visible {
  background: #f8fafc;
  outline: none;
}

.ai-course-curriculum-section.is-expanded .ai-course-curriculum-section__header {
  border-bottom: 1px solid #eef2f7;
}

.ai-course-curriculum-section__title {
  color: #111827;
  font-size: 18px;
  font-weight: 850;
  line-height: 1.4;
  word-break: keep-all;
}

.ai-course-curriculum-section__meta {
  color: #64748b;
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}

.ai-course-curriculum-section__icon {
  position: relative;
  width: 18px;
  height: 18px;
  flex-shrink: 0;
}

.ai-course-curriculum-section__icon::before,
.ai-course-curriculum-section__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  background: #64748b;
  border-radius: 1px;
  transform: translate(-50%, -50%);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.ai-course-curriculum-section__icon::before {
  width: 12px;
  height: 2px;
}

.ai-course-curriculum-section__icon::after {
  width: 2px;
  height: 12px;
}

.ai-course-curriculum-section.is-expanded .ai-course-curriculum-section__icon::after {
  transform: translate(-50%, -50%) scaleY(0);
  opacity: 0;
}

.ai-course-curriculum-section__panel {
  padding: 0 20px 4px;
}

.ai-course-curriculum-section__panel[hidden] {
  display: none;
}

.ai-course-samples {
  scroll-margin-top: 108px;
}

.ai-course-lesson-item {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 0;
  border-bottom: 1px solid #eef2f7;
}

.ai-course-lesson-item--last {
  border-bottom: 0;
}

.ai-course-lesson-item__content {
  min-width: 0;
  flex: 1;
}

.ai-course-lesson-item__content strong {
  display: block;
  color: #111827;
  font-size: 15px;
  font-weight: 800;
  line-height: 1.45;
}

.ai-course-lesson-meta {
  display: flex;
  flex-shrink: 0;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  color: #64748b;
  font-size: 13px;
  font-weight: 800;
}

.ai-course-package-upsell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-color: #bfdbfe;
  background: linear-gradient(135deg, #eff6ff 0%, #ffffff 58%, #ecfeff 100%);
}

.ai-course-package-upsell__eyebrow {
  margin: 0 0 8px;
  color: #2563eb;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ai-course-package-upsell h2 {
  margin: 0 0 8px;
  color: #111827;
  font-size: 24px;
  font-weight: 900;
}

.ai-course-package-upsell p {
  margin: 0;
  color: #4b5563;
  line-height: 1.65;
}

.ai-course-package-upsell__price {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.ai-course-package-upsell__price span,
.ai-course-package-upsell__price strong {
  padding: 7px 10px;
  border-radius: 999px;
  background: #fff;
  color: #1e3a8a;
  font-size: 12px;
  font-weight: 900;
}

.ai-course-package-upsell__price strong {
  background: #1d4ed8;
  color: #fff;
}

.ai-course-related-packages {
  border-color: #dbeafe;
  background: #f8fbff;
}

.ai-course-related-packages__head {
  margin-bottom: 16px;
}

.ai-course-related-packages__head h2 {
  margin: 0 0 8px;
  color: #111827;
  font-size: 24px;
  font-weight: 900;
}

.ai-course-related-package-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.ai-course-related-package-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px;
  border: 1px solid #dbeafe;
  border-radius: 18px;
  background: #fff;
}

.ai-course-related-package-card span {
  color: #2563eb;
  font-size: 12px;
  font-weight: 900;
}

.ai-course-related-package-card h3 {
  margin: 0;
  color: #111827;
  font-size: 19px;
  font-weight: 900;
}

.ai-course-related-package-card p {
  margin: 0;
  color: #4b5563;
  line-height: 1.6;
}

.ai-course-related-package-card .cs-btn {
  margin-top: auto;
}

@media (max-width: 1024px) {
  .ai-course-detail .cs-hero-grid,
  .ai-course-detail .cs-main-layout {
    grid-template-columns: 1fr;
  }

  .ai-course-detail .cs-main-layout {
    display: flex;
    flex-direction: column;
  }

  .ai-course-detail .cs-pay-sticky {
    position: static;
    order: -1;
    max-width: none;
    margin: 0 0 24px;
  }
}

@media (max-width: 768px) {
  .course-detail-page.course-sales.ai-course-detail {
    padding: 0 16px 88px;
  }

  .ai-course-detail .cs-hero {
    padding: 96px 0 28px;
    border-radius: 20px;
  }

  .ai-course-detail .cs-hero-grid {
    gap: 20px;
  }

  .ai-course-detail .cs-meta-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ai-course-detail .cs-meta-row > div:nth-child(2) {
    border-right: 0;
  }

  .ai-course-detail .cs-meta-row > div {
    border-bottom: 1px solid #e5edff;
  }

  .ai-course-detail .cs-meta-row > div:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .ai-course-detail .cs-pay-sticky {
    margin-bottom: 28px;
  }

  .ai-course-detail .cs-pay-sale-price {
    font-size: 28px;
  }

  .course-detail-visual-sections {
    gap: 28px;
  }

  .course-detail-visual-block {
    gap: 20px;
    padding: 24px 18px 20px;
    border-radius: 18px;
  }

  .course-detail-visual-title {
    font-size: 22px;
  }

  .course-detail-visual-description {
    font-size: 15px;
  }

  .course-detail-visual-media__frame {
    min-height: 200px;
    border-radius: 14px;
  }

  .ai-course-detail .course-hero-image-card {
    min-height: 0;
    border-radius: 20px;
  }

  .ai-course-detail .cs-hero-media-card {
    border-radius: 20px;
  }

  .ai-course-detail .cs-ratio:not(.course-hero-image-card),
  .ai-course-detail .cs-ratio:not(.course-hero-image-card) img {
    max-height: 240px;
  }

  .ai-course-detail .cs-section-title {
    font-size: 22px;
  }

  .ai-course-detail-section {
    margin-bottom: 32px;
  }

  .ai-course-package-upsell {
    align-items: stretch;
    flex-direction: column;
  }

  .ai-course-related-package-grid {
    grid-template-columns: 1fr;
  }

  .ai-course-curriculum__head {
    align-items: flex-start;
    flex-direction: column;
  }

  .ai-course-curriculum__toggle-all {
    align-self: flex-start;
  }

  .ai-course-curriculum-section__header {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "title icon"
      "meta icon";
    padding: 16px 16px;
  }

  .ai-course-curriculum-section__title {
    grid-area: title;
    font-size: 17px;
  }

  .ai-course-curriculum-section__meta {
    grid-area: meta;
    white-space: normal;
  }

  .ai-course-curriculum-section__icon {
    grid-area: icon;
    align-self: center;
  }

  .ai-course-curriculum-section__panel {
    padding: 0 16px 4px;
  }

  .ai-course-lesson-item {
    flex-direction: column;
    gap: 12px;
  }

  .ai-course-lesson-meta {
    align-items: flex-start;
    width: 100%;
  }
}