/* ====== School Nav – Glass/Pastel look ====== */
:root {
  --nav-bg: rgba(255, 255, 255, 0.72);
  --nav-border: rgba(255, 255, 255, 0.55);
  --nav-shadow: 0 8px 24px rgba(31, 63, 167, 0.08);
  --nav-text: #1746d1; /* xanh dương đậm */
  --nav-text-dim: #3559d6;
  --nav-hover-bg: rgba(23, 70, 209, 0.08);
  --nav-active: #1e3a8a; /* xanh đậm hơn cho active/underline */
}

/* Khối bao – làm nổi trên nền */
.school-nav {
  position: sticky;
  top: 0;
  z-index: 999;
  padding: 10px 14px; /* nệm để bo góc không đụng cạnh trên */
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.school-nav::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(255, 255, 255, 0.55),
    rgba(255, 255, 255, 0.35)
  );
  z-index: -2;
}

/* Hộp chứa menu (bo góc + viền + bóng) */
#school-nav-list {
  display: flex;
  flex-wrap: nowrap;
  gap: 8px;
  list-style: none;
  margin: 0 auto;
  padding: 6px;
  max-width: 1100px;
  background: var(--nav-bg);
  border: 1px solid var(--nav-border);
  border-radius: 16px;
  box-shadow: var(--nav-shadow);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: none; /* Firefox */
}
#school-nav-list::-webkit-scrollbar {
  display: none;
} /* Chrome */

#school-nav-list .nav-item {
  margin: 0;
}

/* Link – chữ đậm, pill nhẹ, underline animation */
.school-nav-item {
  position: relative !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  padding: 10px 16px !important;
  border-radius: 12px !important;
  font-weight: 600 !important;
  font-size: 24px !important;
  line-height: 1 !important;
  color: var(--nav-text) !important;
  text-decoration: none !important;
  transition: background 0.2s ease, color 0.2s ease, transform 0.08s ease !important;
  white-space: nowrap !important;
}
.school-nav-item:hover {
  background: var(--nav-hover-bg);
  color: var(--nav-text-dim);
}
.school-nav-item:active {
  transform: translateY(1px);
}

/* Gạch chân chạy khi hover */
.school-nav-item::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 6px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(
    90deg,
    transparent,
    var(--nav-active),
    transparent
  );
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.25s ease;
}
.school-nav-item:hover::after {
  transform: scaleX(1);
}

/* Trạng thái active */
.nav-pills .nav-link.active,
.school-nav-item.is-active,
.school-nav-item[aria-current="page"] {
  background: rgba(23, 70, 209, 0.12);
  color: var(--nav-active);
  box-shadow: inset 0 0 0 1px rgba(23, 70, 209, 0.18);
}
.school-nav-item.is-active::after {
  transform: scaleX(1);
}

/* Mobile – dễ bấm, kéo ngang dạng chip */
@media (max-width: 768px) {
  .school-nav {
    padding: 8px 10px;
  }
  #school-nav-list {
    gap: 6px;
    padding: 6px;
  }
  .school-nav-item {
    padding: 10px 14px;
    font-size: 15px;
  }
}

/* Dark section compatibility (nếu dùng [section dark="true"]) */
.section.dark .school-nav #school-nav-list {
  background: rgba(24, 24, 27, 0.6);
  border-color: rgba(255, 255, 255, 0.1);
}
.section.dark .school-nav .school-nav-item {
  color: #e5e7eb;
}
.section.dark .school-nav .school-nav-item:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #ffffff;
}
.section.dark .school-nav .school-nav-item.is-active {
  background: rgba(255, 255, 255, 0.12);
  color: #ffffff;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.18);
}