/* Meru International School — header */
:root {
  --meru-navy: #0a1f44;
  --meru-gold: #c9a227;
  --header-bg: #ffffff;
  --text-nav: #111111;
  --submenu-bg: #ffffff;
  --submenu-border: #e8e8e8;
}

html,
body {
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}

.site-header {
  background: var(--header-bg);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.site-header__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

/* Logo */
.site-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--meru-navy);
}

.site-logo__img {
  display: block;
  width: auto;
  height: 52px;
  max-height: 52px;
}

.site-logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.site-logo__meru {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

.site-logo__sub {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
  font-weight: 600;
  font-size: 0.55rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-top: 2px;
}

/* Nav */
.main-nav {
  font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
}

.main-nav__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.15rem 1.25rem;
  justify-content: flex-end;
}

.main-nav__item {
  position: relative;
}

.main-nav__link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0;
  color: var(--text-nav);
  text-decoration: none;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  white-space: nowrap;
}

.main-nav__link:hover,
.main-nav__link:focus-visible {
  color: var(--meru-navy);
  outline: none;
}

.main-nav__caret {
  font-size: 0.55rem;
  line-height: 1;
  opacity: 0.85;
}

/* Submenu */
.main-nav__sub {
  list-style: none;
  margin: 0;
  padding: 0.4rem 0;
  min-width: 200px;
  position: absolute;
  left: 0;
  top: 100%;
  background: var(--submenu-bg);
  border: 1px solid var(--submenu-border);
  border-radius: 6px;
  box-shadow: 0 8px 24px rgba(10, 31, 68, 0.12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(4px);
  transition: opacity 0.15s ease, transform 0.15s ease, visibility 0.15s;
}

.main-nav__item--has-sub:hover .main-nav__sub,
.main-nav__item--has-sub:focus-within .main-nav__sub {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.main-nav__sub-link {
  display: block;
  padding: 0.55rem 1rem;
  color: var(--text-nav);
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: none;
}

.main-nav__sub-link:hover,
.main-nav__sub-link:focus-visible {
  background: rgba(10, 31, 68, 0.06);
  color: var(--meru-navy);
  outline: none;
}

@media (max-width: 900px) {
  .site-header__inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .main-nav__list {
    justify-content: flex-start;
  }
}

/* Banner */
.hero-banner {
  width: 100%;
  background: #000;
}

.hero-banner__img {
  width: 100%;
  object-fit: cover;
  display: block;
}