html {
  font-size: 14px;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
  box-shadow: 0 0 0 0.1rem white, 0 0 0 0.25rem var(--primary);
}

html {
  position: relative;
  min-height: 100%;
}

body {
  margin: 0;
  padding: 0;
}

/* Keep the scenery anchored below the menu content at every screen size. */
.sidebar-explorer {
  background-color: #f8f9fb;
  background-image:
    linear-gradient(to bottom, rgba(248, 249, 251, 0.98), rgba(248, 249, 251, 0.9)),
    url('../images/menu-landscape.svg'),
    linear-gradient(165deg, #ffffff 0%, #f8f9fb 65%, #fff1f3 100%);
  background-position: center, center bottom, center;
  background-size: 100% 100%, 100% auto, 100% 100%;
  background-repeat: no-repeat;
  border-color: rgba(226, 232, 240, 0.9);
}

.sidebar-explorer .sidebar-tabs {
  background: rgba(255, 255, 255, 0.9);
  border-bottom-color: #e8ebef;
}

.sidebar-explorer .sidebar-tab-btn {
  color: #64748b;
}

.sidebar-explorer .sidebar-tab-btn:hover {
  color: var(--primary);
  background: #fff5f6;
}

.sidebar-explorer .sidebar-tab-btn.active {
  color: var(--primary-hover);
  background: #fff0f2;
}

.sidebar-explorer .sidebar-content-area {
  padding-bottom: 150px;
  scroll-padding-bottom: 20px;
}

.sidebar-explorer #about-list-container {
  background: rgba(255, 255, 255, 0.97);
}

.sidebar-explorer .mobile-sheet-drag-handle {
  background: transparent;
}

.sidebar-explorer .sheet-pill {
  background: #cbd5e1;
}

.brand-logo-img,
.about-logo-img,
.about-modal-logo {
  object-fit: contain;
  border-radius: 0;
  filter: none;
}

.viettel-sidebar-brand {
  text-align: center;
  margin-bottom: 20px;
}

.viettel-sidebar-brand h3 {
  color: var(--primary);
  font-size: 17px;
  font-weight: 800;
}

.viettel-sidebar-brand p {
  color: var(--text-muted);
  font-size: 12px;
}

#about-list-container .about-services-grid {
  grid-template-columns: 1fr;
}

#about-list-container .about-contact-banner {
  grid-template-columns: 1fr;
  gap: 10px;
}

#about-list-container > .about-highlight-box,
#about-list-container > .viettel-services-section,
#about-list-container > .about-contact-banner {
  margin-bottom: 18px;
}

.about-service-card .service-icon-wrap {
  background: var(--primary-light);
  color: var(--primary);
}

.viettel-services-section {
  display: grid;
  gap: 14px;
}

.viettel-services-section .about-section-heading-wrap {
  padding: 0 2px;
  gap: 12px;
}

.viettel-services-section .about-section-heading-wrap::after {
  content: '';
  flex: 1;
  height: 1px;
  background: #e8ebef;
}

.viettel-services-section .about-section-title {
  flex-shrink: 0;
  font-size: 13px;
  line-height: 1.5;
}

.viettel-services-section .about-services-grid {
  gap: 10px;
}

.viettel-services-section .about-service-card {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  align-items: start;
  gap: 12px;
  padding: 16px;
  border-color: #e8ebef;
  border-radius: 12px;
  background: #ffffff;
}

.viettel-services-section .service-icon-wrap {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  font-size: 17px;
}

.viettel-services-section .service-info h5 {
  margin-bottom: 5px;
  line-height: 1.5;
}

.viettel-services-section .service-info p {
  line-height: 1.65;
  text-align: left;
}

.viettel-about-source {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 700;
  text-decoration: none;
}

.viettel-about-source:hover {
  color: var(--primary-hover);
  text-decoration: underline;
}