.custom-navbar {
  background: rgba(255, 255, 255, 0.92) !important;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  padding: 10px 0;
}

/* Final bright theme overrides */
body {
  background:
    radial-gradient(circle at top left, rgba(246, 183, 60, 0.18), transparent 34rem),
    linear-gradient(180deg, #f7fcfb 0%, #eef8f5 50%, #ffffff 100%) !important;
  color: var(--hoi-text) !important;
}

.custom-navbar {
  background: rgba(255, 255, 255, 0.94) !important;
  border-bottom: 1px solid rgba(15, 139, 141, 0.12);
  box-shadow: 0 6px 22px rgba(15, 95, 104, 0.08) !important;
}

.custom-navbar .nav-link:hover {
  color: var(--hoi-primary) !important;
}

.banner-img {
  filter: brightness(0.9) saturate(1.16) !important;
}

.banner-overlay {
  background: rgba(15, 139, 141, 0.18) !important;
  border: 1px solid rgba(255, 255, 255, 0.38);
  box-shadow: 0 18px 42px rgba(11, 95, 104, 0.24) !important;
}

.outline-section {
  background: transparent !important;
}

.outline-header h2,
.outline-title {
  color: var(--hoi-primary-dark) !important;
}

.outline-sidebar,
.outline-viewer,
.outline-page-card {
  border: 1px solid var(--hoi-border) !important;
  background: rgba(255, 255, 255, 0.95) !important;
  box-shadow: var(--hoi-shadow) !important;
}

.outline-menu-item {
  background: var(--hoi-mint) !important;
  color: var(--hoi-primary-dark) !important;
}

.outline-menu-item:hover {
  background: var(--hoi-sand) !important;
}

.outline-menu-item.active {
  background: linear-gradient(135deg, var(--hoi-secondary), #ffd766) !important;
  color: #432818 !important;
}

footer {
  background: linear-gradient(135deg, #e8f7f3, #fff1c2) !important;
  border-top: 1px solid var(--hoi-border);
}

footer h5 {
  color: var(--hoi-primary-dark) !important;
}

/* Hoi An bright theme */
:root {
  --hoi-bg: #f7fcfb;
  --hoi-surface: #ffffff;
  --hoi-primary: #0f8b8d;
  --hoi-primary-dark: #0b5f68;
  --hoi-secondary: #f6b73c;
  --hoi-accent: #e94f37;
  --hoi-mint: #e8f7f3;
  --hoi-sand: #fff7df;
  --hoi-border: #d9ece8;
  --hoi-text: #1f2933;
  --hoi-shadow: 0 10px 28px rgba(15, 139, 141, 0.12);
}

body {
  background:
    radial-gradient(circle at top left, rgba(246, 183, 60, 0.18), transparent 34rem),
    linear-gradient(180deg, #f7fcfb 0%, #eef8f5 50%, #ffffff 100%);
  color: var(--hoi-text);
}

.custom-navbar {
  background: rgba(255, 255, 255, 0.94) !important;
  border-bottom: 1px solid rgba(15, 139, 141, 0.12);
  box-shadow: 0 6px 22px rgba(15, 95, 104, 0.08);
}

.custom-navbar .nav-link:hover {
  color: var(--hoi-primary) !important;
}

.banner-img {
  filter: brightness(0.9) saturate(1.16);
}

.banner-overlay {
  background: rgba(15, 139, 141, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.38);
  box-shadow: 0 18px 42px rgba(11, 95, 104, 0.24);
}

.banner-overlay h1,
.banner-overlay p {
  text-shadow: 0 3px 12px rgba(0, 0, 0, 0.28);
}

.outline-section {
  background: transparent;
}

.outline-header h2,
.outline-title {
  color: var(--hoi-primary-dark);
}

.outline-sidebar,
.outline-viewer,
.outline-page-card {
  border: 1px solid var(--hoi-border);
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--hoi-shadow);
}

.outline-menu-item {
  background: var(--hoi-mint);
  color: var(--hoi-primary-dark);
}

.outline-menu-item:hover {
  background: var(--hoi-sand);
}

.outline-menu-item.active {
  background: linear-gradient(135deg, var(--hoi-secondary), #ffd766);
  color: #432818;
}

.outline-page-card:hover {
  box-shadow: 0 12px 26px rgba(15, 139, 141, 0.16);
}

.pdf-wrapper {
  border-color: var(--hoi-border);
  background: var(--hoi-mint);
}

footer {
  background: linear-gradient(135deg, #e8f7f3, #fff1c2);
  border-top: 1px solid var(--hoi-border);
  color: var(--hoi-text);
}

footer h5 {
  color: var(--hoi-primary-dark);
}

.custom-navbar .navbar-brand img {
  max-height: 42px;
}

.custom-navbar .nav-link {
  color: #333 !important;
  font-weight: 600;
  padding: 10px 14px;
}

.custom-navbar .nav-link:hover {
  color: #1976d2 !important;
}

.custom-toggler {
  border: 0;
  box-shadow: none !important;
}

.custom-toggler:focus {
  box-shadow: none !important;
}

.navbar-toggler-icon {
  filter: invert(1);
}

.banner-img {
  height: 500px;
  object-fit: cover;
  filter: brightness(0.75);
}

.banner-overlay {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  max-width: min(760px, 88vw);
  padding: 20px 30px;
  border-radius: 12px;
  background: rgba(245, 190, 190, 0.45);
  color: #fff;
  text-align: center;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
}

.banner-overlay h1 {
  font-size: 48px;
  font-weight: 800;
}

.banner-overlay p {
  font-size: 20px;
  opacity: 0.9;
}

.carousel-item {
  transition: opacity 1s ease-in-out;
}

.carousel-item img {
  transform: scale(1);
  transition: transform 6s linear;
}

.carousel-item.active img {
  transform: scale(1.05);
}

.outline-section {
  background: #f5f6fa;
  padding: 50px 0;
  user-select: none;
}

.outline-header {
  text-align: center;
  margin-bottom: 30px;
}

.outline-header h2 {
  font-weight: 700;
  color: #222;
}

.outline-header p {
  color: #666;
  margin: 0;
}

.outline-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  align-items: flex-start;
}

.outline-sidebar {
  background: #fff;
  border-radius: 14px;
  padding: 15px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  position: sticky;
  top: 90px;
}

.outline-menu-item {
  padding: 12px 14px;
  border-radius: 10px;
  cursor: pointer;
  margin-bottom: 8px;
  font-weight: 500;
  background: #f8f9fa;
  transition: 0.2s;
}

.outline-menu-item:hover {
  background: #ffe8a3;
}

.outline-menu-item.active {
  background: #ffc107;
  color: #222;
  font-weight: 700;
}

.outline-viewer {
  background: #fff;
  border-radius: 14px;
  padding: 20px;
  min-height: 400px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.outline-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid #eee;
}

.outline-content {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 18px;
}

.outline-page-card {
  background: #f8f9fa;
  border-radius: 12px;
  padding: 8px;
  cursor: pointer;
  transition: 0.2s;
  border: 1px solid #eee;
}

.outline-page-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.outline-page-card img {
  width: 100%;
  height: 230px;
  object-fit: cover;
  border-radius: 8px;
  pointer-events: none;
  user-select: none;
}

.page-label {
  text-align: center;
  font-size: 13px;
  margin-top: 8px;
  color: #555;
  font-weight: 600;
}

.pdf-wrapper {
  width: 100%;
  height: 850px;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid #ddd;
  background: #eee;
}

.pdf-wrapper iframe {
  width: 100%;
  height: 100%;
  border: none;
}

.pdf-note {
  margin-bottom: 12px;
  color: #666;
  font-size: 14px;
}

.modal-preview-img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  user-select: none;
  pointer-events: none;
}

footer {
  background: linear-gradient(135deg, #f8d898, #eca10b);
  color: #333;
}

footer p {
  margin: 4px 0;
  color: #000;
}

footer img {
  filter: brightness(0.9);
}

footer h5 {
  color: #000;
}

footer iframe {
  border-radius: 8px;
}

@media (max-width: 768px) {
  .custom-navbar .container {
    padding-left: 15px;
    padding-right: 15px;
  }

  .custom-navbar .navbar-brand img {
    max-height: 36px;
  }

  .navbar-collapse {
    margin-top: 10px;
    padding: 12px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
  }

  .navbar-nav {
    gap: 6px;
  }

  .custom-navbar .nav-link {
    display: block;
    width: 100%;
    padding: 12px;
    border-radius: 10px;
    color: #222 !important;
  }

  .custom-navbar .nav-link:hover {
    background: #e3f2fd;
  }

  .banner-img {
    height: 300px;
  }

  .banner-overlay {
    width: 88%;
    padding: 16px;
  }

  .banner-overlay h1 {
    font-size: 28px;
  }

  .banner-overlay p {
    font-size: 16px;
  }

  .outline-layout {
    grid-template-columns: 1fr;
  }

  .outline-sidebar {
    position: static;
  }

  .pdf-wrapper {
    height: 650px;
  }
}

/* End of file theme lock */
body {
  background:
    radial-gradient(circle at top left, rgba(246, 183, 60, 0.18), transparent 34rem),
    linear-gradient(180deg, #f7fcfb 0%, #eef8f5 50%, #ffffff 100%) !important;
  color: var(--hoi-text) !important;
}

.custom-navbar {
  background: rgba(255, 255, 255, 0.94) !important;
  border-bottom: 1px solid rgba(15, 139, 141, 0.12);
  box-shadow: 0 6px 22px rgba(15, 95, 104, 0.08) !important;
}

.custom-navbar .nav-link:hover {
  color: var(--hoi-primary) !important;
}

.banner-img {
  filter: brightness(0.9) saturate(1.16) !important;
}

.banner-overlay {
  background: rgba(15, 139, 141, 0.18) !important;
  border: 1px solid rgba(255, 255, 255, 0.38);
  box-shadow: 0 18px 42px rgba(11, 95, 104, 0.24) !important;
}

.outline-section {
  background: transparent !important;
}

.outline-header h2,
.outline-title {
  color: var(--hoi-primary-dark) !important;
}

.outline-sidebar,
.outline-viewer,
.outline-page-card {
  border: 1px solid var(--hoi-border) !important;
  background: rgba(255, 255, 255, 0.95) !important;
  box-shadow: var(--hoi-shadow) !important;
}

.outline-menu-item {
  background: var(--hoi-mint) !important;
  color: var(--hoi-primary-dark) !important;
}

.outline-menu-item:hover {
  background: var(--hoi-sand) !important;
}

.outline-menu-item.active {
  background: linear-gradient(135deg, var(--hoi-secondary), #ffd766) !important;
  color: #432818 !important;
}

footer {
  background: linear-gradient(135deg, #e8f7f3, #fff1c2) !important;
  border-top: 1px solid var(--hoi-border);
}

footer h5 {
  color: var(--hoi-primary-dark) !important;
}