/* ── PAGE BANNER ── */
#booking-banner {
  background: url('/asset/pages/booking/img/banner_teacher.png') center/cover no-repeat;
  min-height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  position: relative;
}
#booking-banner::before { content:''; position:absolute; inset:0; background:rgba(0,0,0,0.65); }
#booking-banner > * { position: relative; z-index: 1; }
#booking-banner h1 { font-family:var(--font-serif); font-size:clamp(26px,4vw,48px); font-weight:400; color:#fff; margin:0 0 12px; }
#booking-banner p  { color:var(--text-secondary); font-size: 16px; margin:0; letter-spacing:.1em; }

@media (max-width: 768px) {
  #booking-banner p { padding: 0 var(--container-pad); }
}

/* ── TEACHER GRID SECTIONS ── */
.teacher-section { padding: var(--space-xl) 0; }
.teacher-section + .teacher-section { padding-top: 0; }

.teacher-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}
@media (max-width: 900px) { .teacher-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 640px) { .teacher-grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-sm); } }

/* ── TEACHER CARD ── */
.teacher-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  cursor: pointer;
}
.teacher-card:hover {
  border-color: var(--border-gold);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}
.teacher-card .tc-img {
  width: 100%;
  aspect-ratio: 17 / 10;
  object-fit: contain;
  display: block;
  background: var(--bg-primary);
  transition: transform .4s ease;
}
.teacher-card:hover .tc-img { transform: none; }
.teacher-card .tc-img-wrap { overflow: hidden; }

.teacher-card .tc-body {
  padding: 14px 14px 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.teacher-card .tc-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  line-height: 1.3;
}
.teacher-card .tc-school {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0;
}
.teacher-card .tc-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 10px;
}
.teacher-card .tc-detail-btn {
  font-size: 14px;
  padding: 5px 14px;
}

/* ── VIDEO PREVIEW STRIP ── */
.video-preview { padding: var(--space-xl) 0; background: var(--bg-secondary); }
.video-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-md); }
@media (max-width: 768px) { .video-strip { grid-template-columns: 1fr; } }

.video-preview-card { background: var(--bg-card); border-radius: var(--radius-md); overflow: hidden; border: 1px solid var(--border-subtle); }
.video-preview-card video { width:100%; aspect-ratio:16/9; object-fit:cover; display:block; background:#000; }
.video-preview-card .vp-body { padding: 12px 14px; }
.video-preview-card .vp-teacher { font-size: 14px; color:var(--text-muted); margin:0 0 4px; }
.video-preview-card .vp-title { font-size: 14px; color:var(--accent-gold); margin:0; line-height:1.4; }
.video-preview-cta { text-align:center; margin-top: var(--space-lg); }

/* ── COLUMN COURSES ── */
.column-section { padding: var(--space-xl) 0; }
.column-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--space-sm); }
@media (max-width: 900px) { .column-grid { grid-template-columns: repeat(4, 1fr); } }
@media (max-width: 600px) { .column-grid { grid-template-columns: repeat(3, 1fr); } }
.column-card img { width:100%; aspect-ratio:9/16; object-fit:cover; border-radius: var(--radius-sm); display:block; transition:transform .3s; }
.column-card:hover img { transform: scale(1.03); }

/* ── BOOKING GUIDE ── */
.booking-guide { padding: var(--space-xl) 0; background: var(--bg-secondary); }
.booking-steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-lg); text-align: center; }
@media (max-width: 600px) { .booking-steps { grid-template-columns: 1fr; } }
.booking-step .step-num { font-family: var(--font-serif); font-size: 48px; color: var(--accent-gold); opacity:.3; line-height:1; }
.booking-step h3 { font-size: 17px; color:var(--text-primary); margin:8px 0 6px; }
.booking-step p { font-size: 14px; color:var(--text-muted); margin:0; }