/* ========== Hero (首頁) ========== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, var(--background-primary) 0%, var(--background-secondary) 100%);
  padding: 2rem;
}
.hero-content {
  max-width: 800px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}
.hero-headline {
  font-size: clamp(2.2rem, 6vw, 3.8rem);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
}
.hero-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.3rem);
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 600px;
  text-wrap: balance;
}
.hero-stats {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
  justify-content: center;
  margin-top: 1rem;
}
.hero-stat-item { display: flex; flex-direction: column; align-items: center; gap: 0.2rem; }
.hero-stat-number { font-size: 1.5rem; font-weight: 700; color: var(--text-primary); }
.hero-stat-label { font-size: 0.85rem; color: var(--text-secondary); }
.hero-stat-divider { font-size: 1.2rem; color: var(--text-tertiary); margin: 0 0.5rem; }
.hero-cta {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.9rem 2.2rem;
  background-color: var(--accent-yellow);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 1.1rem;
  border-radius: var(--radius-medium);
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-light);
}
.hero-cta:hover {
  background-color: var(--accent-yellow-dark);
  box-shadow: var(--shadow-medium);
}
@media (max-width: 768px) {
  .hero { min-height: 85vh; padding: 2rem 1.5rem; }
  .hero-stats { gap: 0.3rem; }
  .hero-stat-divider { margin: 0 0.2rem; }
  .hero-stat-number { font-size: 1.3rem; }
}

/* ========== 課程頁共用 (Course Page) ========== */
.course-page {
  max-width: 960px;
  margin: 0 auto;
  padding: 3rem 1.5rem 5rem;
  color: var(--text-primary);
}
.course-back {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: 2rem;
}
.course-back:hover { color: var(--primary-blue); }

.course-header { margin-bottom: 3rem; }
.course-eyebrow {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-blue);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}
.course-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 0.75rem;
}
.course-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.75;
}
.course-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
  font-size: 0.9rem;
  color: var(--text-secondary);
}
.course-meta strong { color: var(--text-primary); margin-right: 0.4rem; }

.course-section { margin-bottom: 3rem; }
.course-section h2 {
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--accent-yellow);
  display: inline-block;
}
.course-section h3 {
  font-size: 1.15rem;
  margin: 1.5rem 0 0.75rem;
  color: var(--text-primary);
}
.course-section p { margin-bottom: 1rem; color: var(--text-secondary); }
.course-section ul, .course-section ol {
  padding-left: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-secondary);
}
.course-section li { margin-bottom: 0.4rem; }

/* schedule table style */
.schedule-block {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-medium);
  background: #fff;
  box-shadow: var(--shadow-light);
  padding: 1.25rem 1.5rem;
  margin-bottom: 1rem;
}
.schedule-time {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary-blue);
  margin-bottom: 0.35rem;
}
.schedule-title {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}
.schedule-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.callout {
  background: var(--background-secondary);
  border-left: 3px solid var(--primary-blue);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-small);
  margin: 1rem 0;
  font-size: 0.95rem;
  color: var(--text-secondary);
}
.callout.accent { border-color: var(--accent-yellow-dark); }

.tag-row { display: flex; flex-wrap: wrap; gap: 0.5rem; margin: 0.75rem 0; }
.tag {
  background: var(--background-secondary);
  color: var(--text-secondary);
  font-size: 0.8rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
}

/* Admin */
.admin-shell {
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
}
.admin-form {
  width: 100%;
  max-width: 20rem;
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-medium);
  padding: 1.5rem;
}
.admin-form h1 {
  text-align: center;
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 1rem;
}
.admin-input {
  width: 100%;
  box-sizing: border-box;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-small);
  padding: 0.625rem 1rem;
  text-align: center;
  font-size: 1.125rem;
  letter-spacing: 0.3em;
  outline: none;
  transition: border-color 0.15s;
}
.admin-input:focus { border-color: var(--primary-blue); }
.admin-input.error { border-color: #f87171; background: #fef2f2; }
.admin-error { margin-top: 0.5rem; text-align: center; font-size: 0.875rem; color: #ef4444; }
.admin-submit {
  margin-top: 1rem;
  width: 100%;
  background: var(--primary-blue);
  color: #fff;
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.625rem 1rem;
  border: none;
  border-radius: var(--radius-small);
  cursor: pointer;
  transition: opacity 0.15s;
}
.admin-submit:hover { opacity: 0.9; }

.admin-page { max-width: 48rem; margin: 0 auto; padding: 3rem 1.5rem; }
.admin-page-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 2rem;
}
.admin-page-header h1 { font-size: 1.5rem; font-weight: 700; }
.admin-back { color: var(--text-secondary); font-size: 0.875rem; text-decoration: none; }
.admin-back:hover { text-decoration: underline; }
.admin-group { margin-bottom: 1.5rem; }
.admin-group-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
}
.admin-list {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-large);
  box-shadow: var(--shadow-light);
  overflow: hidden;
}
.admin-list a {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.875rem 1.25rem;
  text-decoration: none;
  border-bottom: 1px solid var(--border-color);
  transition: background 0.15s;
}
.admin-list a:last-child { border-bottom: none; }
.admin-list a:hover { background: #fafafa; }
.admin-list-label { font-size: 0.875rem; font-weight: 500; color: var(--text-primary); }
.admin-list-href { font-size: 0.75rem; color: var(--text-secondary); }