/*
 * single-course.css — 無料コースのコース詳細 TOP (issue #72)
 *
 * Scoped entirely under `.course-detail`. The page body carries `zone-free`
 * (teal palette); we re-declare a blue (#2563EB) + gold token set directly on
 * the wrapper so it wins over the inherited zone-free tokens WITHOUT !important
 * (same technique .home-v2 uses in pages.css).
 *
 * Companion template: single-lp_course.php (BEM prefix course-detail__*).
 */

.course-detail{
  --color-primary:#1E40AF; --color-accent:#2563EB; --color-accent-light:#93C5FD;
  --color-accent-bg:#EFF6FF; --color-secondary:#FACC15; --color-secondary-bg:#FEF9C3;
  --color-bg:#F8FAFC; --color-surface:#FFFFFF; --color-border:#E2E8F0;
  --color-text-primary:#0F172A; --color-text-body:#334155; --color-text-secondary:#475569; --color-text-muted:#94A3B8;
  --zone-accent-primary:#2563EB; --zone-accent-secondary:#FACC15;
  --zone-radius-card:16px; --zone-radius-button:999px;
  --shadow-card:0 8px 24px rgba(37,99,235,0.10);
  --cd-gold:#F2A93B; --cd-gold-bg:#FEF6E3; --cd-gold-strong:#E08A1E; /* CTA gold/amber */

  background: var(--color-bg);
  color: var(--color-text-body);
  font-family: var(--font-family-base);
}

/* ---- shared primitives ---- */
.course-detail__container{
  max-width: var(--container-max, 1200px);
  margin: 0 auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

/* ===========================================================
 * Breadcrumb
 * =========================================================== */
.course-detail__breadcrumb{
  padding: var(--space-4) 0 0;
  font-size: var(--text-caption);
}
.course-detail__crumbs{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
  margin: 0;
  padding: 0;
}
.course-detail__crumbs a{
  color: var(--color-text-secondary);
  text-decoration: none;
}
.course-detail__crumbs a:hover{ color: var(--color-accent); text-decoration: underline; }
.course-detail__crumb-sep{ color: var(--color-text-muted); }
.course-detail__crumb-current{
  color: var(--color-text-primary);
  font-weight: var(--weight-semibold);
}

/* ===========================================================
 * 2-column layout
 * =========================================================== */
.course-detail__layout{
  display: grid;
  grid-template-columns: minmax(0, 62fr) minmax(0, 38fr);
  gap: clamp(24px, 3vw, 48px);
  align-items: start;
  padding-top: var(--space-8);
  padding-bottom: clamp(48px, 6vw, 88px);
}
.course-detail__main{ min-width: 0; }

/* ===========================================================
 * Hero (left)
 * =========================================================== */
.course-detail__roadmap-badge{
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  background: var(--color-accent-bg);
  color: var(--color-primary);
  font-size: var(--text-caption);
  font-weight: var(--weight-bold);
  padding: 6px 14px;
  border-radius: var(--radius-pill);
}
.course-detail__roadmap-step{
  font-size: var(--text-tiny);
  font-weight: var(--weight-semibold);
  color: var(--color-accent);
  background: #fff;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
}
.course-detail__title{
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: var(--weight-bold);
  line-height: 1.3;
  color: var(--color-text-primary);
  margin: var(--space-4) 0 var(--space-3);
}
.course-detail__subtitle{
  font-size: clamp(15px, 1.6vw, 18px);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
  margin: 0 0 var(--space-6);
}

/* meta row — 4 inline icon+label+value items */
.course-detail__meta-row{
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4) var(--space-8);
  list-style: none;
  margin: 0 0 var(--space-6);
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}
.course-detail__meta-item{
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.course-detail__meta-icon{
  font-size: 18px;
  line-height: 1;
}
.course-detail__meta-text{
  display: flex;
  flex-direction: column;
  line-height: 1.3;
}
.course-detail__meta-label{
  font-size: var(--text-tiny);
  color: var(--color-text-muted);
}
.course-detail__meta-value{
  font-size: var(--text-body);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
}

.course-detail__description{
  font-size: var(--text-body);
  line-height: var(--leading-relaxed);
  color: var(--color-text-body);
  margin-bottom: var(--space-7);
}
.course-detail__description p{ margin: 0; }

/* Gold free CTA banner under description */
.course-detail__cta-banner{
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  background: var(--cd-gold-bg);
  border: 1px solid #F4D9A5;
  border-radius: var(--zone-radius-card);
  padding: clamp(18px, 2.4vw, 28px);
}
.course-detail__cta-banner-copy{ min-width: 0; }
.course-detail__cta-banner-head{
  font-size: clamp(16px, 1.8vw, 19px);
  font-weight: var(--weight-bold);
  color: #7A4A12;
  margin: 0 0 var(--space-1);
}
.course-detail__cta-banner-sub{
  font-size: var(--text-caption);
  color: #8A5A20;
  margin: 0;
  line-height: var(--leading-normal);
}
.course-detail__cta-banner-action{
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-2);
}
.course-detail__cta-banner-login,
.course-detail__aside-cta-login{
  font-size: var(--text-small);
  color: var(--color-primary);
  text-decoration: underline;
}
.course-detail__cta-banner-login:hover,
.course-detail__aside-cta-login:hover{ color: var(--color-accent); }

/* ---- Gold CTA button (warm amber, dark text — NOT blue) ---- */
.course-detail__cta-gold{
  display: inline-block;
  background: var(--cd-gold);
  color: #1F2937;
  font-size: var(--text-body);
  font-weight: var(--weight-bold);
  padding: 13px 28px;
  border-radius: var(--zone-radius-button);
  border: none;
  text-decoration: none;
  text-align: center;
  line-height: 1.4;
  box-shadow: 0 6px 16px rgba(224, 138, 30, 0.28);
  transition: background 0.2s, transform 0.15s;
}
.course-detail__cta-gold:hover{
  background: var(--cd-gold-strong);
  color: #1F2937;
  transform: translateY(-1px);
}
.course-detail__cta-gold--block{
  display: block;
  width: 100%;
}

/* ===========================================================
 * Sections (shared)
 * =========================================================== */
.course-detail__section{
  margin-top: clamp(40px, 5vw, 64px);
}
.course-detail__section-title{
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  line-height: var(--leading-tight);
  margin: 0 0 var(--space-6);
}
.course-detail__section-title--center{
  text-align: center;
  padding-bottom: var(--space-3);
  position: relative;
}
.course-detail__section-title--center::after{
  content: "";
  display: block;
  width: 48px;
  height: 3px;
  border-radius: 2px;
  background: var(--color-accent);
  margin: var(--space-3) auto 0;
}

/* ===========================================================
 * 学べること — 4-col grid
 * =========================================================== */
.course-detail__learn-grid{
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
}
.course-detail__learn-card{
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.course-detail__learn-num{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-circle);
  background: var(--color-accent-bg);
  color: var(--color-accent);
  font-weight: var(--weight-bold);
  font-size: var(--text-body);
}
.course-detail__learn-card-title{
  font-size: var(--text-h3);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  line-height: var(--leading-tight);
  margin: 0;
}
.course-detail__learn-card-body{
  font-size: var(--text-caption);
  line-height: var(--leading-normal);
  color: var(--color-text-body);
  margin: 0;
}

/* ===========================================================
 * カリキュラム
 * =========================================================== */
.course-detail__curriculum-note{
  text-align: center;
  font-size: var(--text-caption);
  color: var(--color-text-muted);
  margin: calc(var(--space-4) * -1) 0 var(--space-6);
}
.course-detail__lessons{
  display: grid;
  gap: var(--space-3);
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: none;
}
.course-detail__lesson{
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: var(--space-4) var(--space-5);
}
.course-detail__lesson-num{
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-circle);
  background: var(--color-primary);
  color: #fff;
  font-weight: var(--weight-bold);
  font-size: var(--text-caption);
}
.course-detail__lesson-body{
  flex: 1 1 auto;
  min-width: 0;
}
.course-detail__lesson-title{
  font-size: var(--text-body);
  font-weight: var(--weight-semibold);
  color: var(--color-text-primary);
  margin: 0 0 2px;
  line-height: var(--leading-tight);
}
.course-detail__lesson-title a{
  color: inherit;
  text-decoration: none;
}
.course-detail__lesson-title a:hover{
  color: var(--color-accent);
  text-decoration: underline;
}
.course-detail__lesson-desc{
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
  margin: 0 0 var(--space-1);
}
.course-detail__lesson-dur{
  display: inline-block;
  font-size: var(--text-tiny);
  font-weight: var(--weight-semibold);
  color: var(--color-text-muted);
  font-variant-numeric: tabular-nums;
}
.course-detail__lesson-lock{
  flex: 0 0 auto;
  font-size: 18px;
  line-height: 1;
  color: var(--color-text-muted);
  text-decoration: none;
}
/* Open (member) rows: the ▶ affordance picks up the brand accent. */
a.course-detail__lesson-lock{
  color: var(--color-accent);
}
.course-detail__lesson--open:hover{
  border-color: var(--color-accent-light);
}
.course-detail__curriculum-more{
  text-align: center;
  margin-top: var(--space-6);
}
.course-detail__btn-outline{
  display: inline-block;
  background: #fff;
  color: var(--color-accent);
  font-size: var(--text-body);
  font-weight: var(--weight-semibold);
  padding: 11px 28px;
  border-radius: var(--zone-radius-button);
  border: 1.5px solid var(--color-accent);
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}
.course-detail__btn-outline:hover{
  background: var(--color-accent);
  color: #fff;
}

/* ===========================================================
 * Aside (sticky)
 * =========================================================== */
.course-detail__aside-inner{
  position: sticky;
  top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.course-detail__aside-card{
  padding: var(--space-5);
}
.course-detail__aside-title{
  font-size: var(--text-h3);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  margin: 0 0 var(--space-4);
}

/* コースの内容 meta list */
.course-detail__aside-meta{ margin: 0; }
.course-detail__aside-meta-row{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}
.course-detail__aside-meta-row:last-child{ border-bottom: none; }
.course-detail__aside-meta-label{
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-caption);
  color: var(--color-text-secondary);
  margin: 0;
}
.course-detail__aside-meta-icon{ font-size: 16px; line-height: 1; }
.course-detail__aside-meta-value{
  font-size: var(--text-body);
  font-weight: var(--weight-bold);
  color: var(--color-text-primary);
  text-align: right;
  margin: 0;
}

/* プレビュー */
.course-detail__preview-thumb{
  display: block;
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, #0D1B2A, #1a3a5c);
}
.course-detail__preview-img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.course-detail__preview-placeholder{
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 40px;
  color: rgba(255,255,255,0.7);
}
.course-detail__preview-play{
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-circle);
  background: rgba(255,255,255,0.92);
  color: var(--color-accent);
  font-size: 22px;
  padding-left: 4px;
  box-shadow: 0 4px 14px rgba(0,0,0,0.25);
}
.course-detail__preview-thumb:hover .course-detail__preview-play{
  background: #fff;
}
.course-detail__preview-caption{
  font-size: var(--text-small);
  color: var(--color-text-secondary);
  text-align: center;
  margin: var(--space-3) 0 0;
}

/* おすすめ */
.course-detail__recommend-list{
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.course-detail__recommend-item{
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: var(--text-caption);
  line-height: var(--leading-normal);
  color: var(--color-text-body);
}
.course-detail__recommend-check{
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: var(--radius-circle);
  background: var(--color-accent-bg);
  color: var(--color-accent);
  font-size: 12px;
  font-weight: var(--weight-bold);
  margin-top: 1px;
}

/* duplicate gold CTA card */
.course-detail__aside-cta{
  background: var(--cd-gold-bg);
  border: 1px solid #F4D9A5;
  border-radius: var(--zone-radius-card);
  padding: var(--space-5);
  text-align: center;
}
.course-detail__aside-cta-head{
  font-size: var(--text-h3);
  font-weight: var(--weight-bold);
  color: #7A4A12;
  margin: 0 0 var(--space-2);
}
.course-detail__aside-cta-sub{
  font-size: var(--text-caption);
  color: #8A5A20;
  line-height: var(--leading-normal);
  margin: 0 0 var(--space-4);
}
.course-detail__aside-cta-login{
  display: inline-block;
  margin-top: var(--space-3);
}

/* ===========================================================
 * Responsive
 * =========================================================== */
@media (max-width: 960px){
  .course-detail__layout{
    grid-template-columns: 1fr;
    padding-top: var(--space-6);
  }
  .course-detail__aside-inner{
    position: static;
    top: auto;
  }
  .course-detail__learn-grid{
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px){
  .course-detail__learn-grid{
    grid-template-columns: 1fr;
  }
  .course-detail__meta-row{
    gap: var(--space-4) var(--space-6);
  }
  .course-detail__cta-banner{
    flex-direction: column;
    align-items: stretch;
  }
  .course-detail__cta-banner-action{
    align-items: stretch;
  }
  .course-detail__cta-gold{ width: 100%; }
}