.scert-section-nav,
.scert-section-nav * {
  box-sizing: border-box;
}

.scert-section-nav {
  --scert-accent: #c7232f;
  --scert-text: #161d27;
  --scert-border: #e4e7eb;
  --scert-shadow: 0 8px 20px rgba(15, 19, 26, 0.13);
  position: relative;
  width: 100%;
  z-index: 250;
  color: var(--scert-text);
  background: #fff;
  font-family: Arial, Helvetica, sans-serif;
}

.scert-section-nav button,
.scert-section-nav a {
  font: inherit;
}

.scert-section-bar {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
  min-height: 60px;
  padding: 0 20px;
  border-top: 1px solid var(--scert-border);
  border-bottom: 1px solid var(--scert-border);
  background: #fff;
  box-shadow: 0 4px 12px rgba(15, 19, 26, 0.08);
}

.scert-section-brand-row {
  display: flex;
  flex: 0 0 auto;
  align-items: center;
}

.scert-section-brand {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--scert-text);
  text-decoration: none;
}

.scert-section-brand img {
  display: block;
  width: 135px;
  height: auto;
}

.scert-section-brand strong {
  padding-left: 9px;
  border-left: 1px solid var(--scert-border);
  color: var(--scert-accent);
  font-size: 15px;
  letter-spacing: 0.04em;
}

.scert-section-burger {
  display: none;
  width: 42px;
  height: 42px;
  margin: 0 10px 0 0;
  padding: 10px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
}

.scert-section-burger span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 4px 0;
  border-radius: 2px;
  background: var(--scert-text);
}

.scert-section-menu {
  flex: 1 1 auto;
  min-width: 0;
}

.scert-section-mobile-head {
  display: none;
}

.scert-section-items {
  display: flex;
  align-items: stretch;
  justify-content: flex-end;
  margin: 0;
  padding: 0;
  list-style: none;
}

.scert-section-item {
  position: static;
  margin: 0;
  padding: 0;
  list-style: none;
}

.scert-section-link {
  display: flex;
  align-items: center;
  min-height: 59px;
  padding: 0 12px;
  border: 0;
  background: transparent;
  color: var(--scert-text);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
}

.scert-section-dropdown > .scert-section-link::after {
  content: "";
  width: 7px;
  height: 7px;
  margin-left: 8px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
}

.scert-section-item:hover > .scert-section-link,
.scert-section-item:focus-within > .scert-section-link {
  color: var(--scert-accent);
}

.scert-section-submenu {
  position: absolute;
  top: calc(100% - 1px);
  right: 16px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  width: min(1000px, calc(100% - 32px));
  max-height: 70vh;
  padding: 14px;
  border-top: 3px solid var(--scert-accent);
  border-radius: 0 0 6px 6px;
  background: #fff;
  box-shadow: var(--scert-shadow);
  opacity: 0;
  overflow-y: auto;
  pointer-events: none;
  transform: translateY(8px);
  visibility: hidden;
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s ease;
}

.scert-section-dropdown:hover > .scert-section-submenu,
.scert-section-dropdown:focus-within > .scert-section-submenu {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
  visibility: visible;
}

.scert-section-submenu section {
  min-width: 0;
  padding: 4px 12px 10px;
}

.scert-section-submenu h2,
.scert-section-submenu h3 {
  margin: 0 0 8px;
  padding: 0;
  text-align: left;
  text-transform: none;
}

.scert-section-submenu h2 {
  color: var(--scert-accent);
  font-size: 14px;
  font-weight: 700;
}

.scert-section-submenu h3 {
  color: #4c5561;
  font-size: 12px;
  font-weight: 700;
}

.scert-section-submenu ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.scert-section-submenu li {
  position: relative;
  margin: 0;
  padding: 5px 0 5px 13px;
  color: #9aa3ad;
  font-size: 13px;
  line-height: 1.35;
  list-style: none;
}

.scert-section-submenu li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--scert-accent);
  font-weight: 700;
}

/* ASCII-only override for legacy ISO-8859-1 SCERT pages. */
.scert-section-submenu li::before {
  content: ">";
}

.scert-section-submenu a {
  color: #1b4f91;
  text-decoration: none;
}

.scert-section-submenu a:hover,
.scert-section-submenu a:focus {
  color: var(--scert-accent);
  text-decoration: underline;
}

.scert-section-overlay {
  display: none;
}

.scert-section-promo {
  padding: 6px 20px;
  text-align: center;
  background: #f6f8fa;
  border-bottom: 1px solid var(--scert-border);
}

.scert-section-promo a {
  color: #174599;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

.scert-section-promo span {
  margin-left: 4px;
  color: var(--scert-accent);
}

.scert-section-ad {
  width: 100%;
  overflow: hidden;
  text-align: center;
  background: #fff;
}

.scert-section-ad:empty {
  display: none;
}

@media (max-width: 900px) {
  .scert-section-nav[data-scert-menu-open="true"] {
    z-index: 390;
  }

  .scert-section-bar {
    min-height: 58px;
    padding: 0 12px;
  }

  .scert-section-burger {
    display: block;
  }

  .scert-section-brand strong {
    display: none;
  }

  .scert-section-overlay {
    position: fixed;
    inset: 0;
    z-index: 400;
    display: block;
    background: rgba(15, 19, 26, 0.68);
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
  }

  .scert-section-menu {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 410;
    width: min(330px, 88vw);
    height: 100vh;
    background: #fff;
    box-shadow: var(--scert-shadow);
    overflow: hidden;
    transform: translateX(-105%);
    transition: transform 0.24s ease;
  }

  .scert-section-nav[data-scert-menu-open="true"] .scert-section-overlay {
    opacity: 1;
    pointer-events: auto;
    visibility: visible;
  }

  .scert-section-nav[data-scert-menu-open="true"] .scert-section-menu {
    transform: translateX(0);
  }

  .scert-section-mobile-head {
    display: grid;
    grid-template-columns: 44px 1fr 44px;
    align-items: center;
    min-height: 58px;
    border-bottom: 1px solid var(--scert-border);
  }

  .scert-section-mobile-head button {
    width: 44px;
    height: 44px;
    padding: 0;
    border: 0;
    background: transparent;
    color: var(--scert-text);
    font-size: 30px;
    cursor: pointer;
  }

  .scert-section-mobile-head [data-scert-submenu-back] {
    opacity: 0;
    pointer-events: none;
  }

  .scert-section-menu[data-scert-submenu-open="true"] .scert-section-mobile-head [data-scert-submenu-back] {
    opacity: 1;
    pointer-events: auto;
  }

  .scert-section-mobile-head strong {
    overflow: hidden;
    font-size: 15px;
    text-align: center;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .scert-section-items {
    display: block;
    height: calc(100vh - 58px);
    padding: 8px 0 24px;
    overflow-x: hidden;
    overflow-y: auto;
  }

  .scert-section-link {
    justify-content: space-between;
    width: 100%;
    min-height: 48px;
    padding: 0 18px;
    border-bottom: 1px solid #f0f1f3;
    text-align: left;
  }

  .scert-section-dropdown > .scert-section-link::after {
    transform: rotate(-45deg);
  }

  .scert-section-submenu {
    position: absolute;
    inset: 58px 0 0;
    z-index: 2;
    display: none;
    grid-template-columns: 1fr;
    width: 100%;
    max-height: none;
    padding: 8px 10px 24px;
    border: 0;
    border-radius: 0;
    box-shadow: none;
    opacity: 1;
    overflow-y: auto;
    pointer-events: auto;
    transform: none;
    visibility: visible;
  }

  .scert-section-dropdown:hover > .scert-section-submenu,
  .scert-section-dropdown:focus-within > .scert-section-submenu {
    transform: none;
  }

  .scert-section-dropdown.is-active > .scert-section-submenu {
    display: grid;
  }

  .scert-section-submenu section {
    padding: 10px 8px 12px;
    border-bottom: 1px solid var(--scert-border);
  }

  .scert-section-submenu li {
    padding-top: 7px;
    padding-bottom: 7px;
    font-size: 14px;
  }

  .scert-section-promo {
    padding: 5px 12px;
  }
}

@media (max-width: 380px) {
  .scert-section-brand img {
    width: 118px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .scert-section-nav .scert-section-menu,
  .scert-section-nav .scert-section-overlay,
  .scert-section-nav .scert-section-submenu {
    transition: none;
  }
}