/* ================= ROOT ================= */
:root {
  --china-blue: #0a2a66;
  --gold: #FFD700;
  --red: #D32F2F;
  --white: #ffffff;
}

/* ================= NAVBAR BASE ================= */
.navbar {
  width: 100%;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  backdrop-filter: blur(12px);
  background: rgba(10, 42, 102, 0.88);
  box-shadow: 0 8px 20px rgba(0,0,0,0.25);
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.navbar .container.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
}

/* ================= LOGO ================= */
.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  color: var(--white);
  transition: transform 0.3s ease;
}

.logo:hover {
  transform: scale(1.05);
}

.logo-img {
  width: 80px;
  height: auto;
  margin-right: 8px;
  border-radius: 6px;
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-main {
  font-size: 1.8rem;
  font-weight: 800;
  line-height: 1;
  color: var(--white);
}

.logo-sub {
  font-size: 1rem;
  color: var(--gold);
  letter-spacing: 1px;
}

/* ================= NAV LINKS ================= */
.nav-menu {
  display: flex;
  gap: 28px;
}

.nav-menu a {
  color: var(--white);
  text-decoration: none;
  font-size: 1.05rem;
  font-weight: 500;
  position: relative;
  padding: 4px 0;
  transition: color 0.3s ease;
}

/* language toggle */
.nav-actions .lang-toggle {
  margin-right: 16px;
  padding: 6px 12px;
  background: var(--gold);
  color: var(--china-blue);
  border: none;
  border-radius: 4px;
  cursor: pointer;
  font-weight: 600;
  transition: background 0.3s ease;
}

.nav-actions .lang-toggle:hover {
  background: var(--red);
  color: var(--white);

  transition: width 0.3s ease;
}

.nav-menu a:hover {
  color: var(--gold);
}

.nav-menu a:hover::after {
  width: 100%;
}

/* ================= HAMBURGER ================= */
.menu-toggle {
  display: none;
  width: 32px;
  height: 22px;
  background: none;
  border: none;
  cursor: pointer;
  position: relative;
  z-index: 1100;
}

.menu-toggle .hamburger,
.menu-toggle .hamburger::before,
.menu-toggle .hamburger::after {
  position: absolute;
  width: 100%;
  height: 3px;
  background: var(--white);
  border-radius: 3px;
  transition: all 0.3s ease;
}

.menu-toggle .hamburger {
  top: 50%;
  transform: translateY(-50%);
}

.menu-toggle .hamburger::before {
  content: "";
  top: -9px;
}

.menu-toggle .hamburger::after {
  content: "";
  top: 9px;
}

/* OPEN STATE */
.menu-toggle.open .hamburger {
  background: var(--gold);
  transform: rotate(45deg);
}

.menu-toggle.open .hamburger::before {
  top: 0;
  background: var(--red);
}

.menu-toggle.open .hamburger::after {
  top: 0;
  transform: rotate(-90deg);
  background: var(--gold);
}

/* ================= MOBILE MENU ================= */
@media (max-width: 992px) {

  .menu-toggle {
    display: block;
  }

  .nav-menu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(10, 42, 102, 0.97);
    flex-direction: column;
    gap: 18px;
    padding: 24px 0;
    text-align: center;

    /* animation setup */
    transform: translateY(-20px);
    opacity: 0;
    pointer-events: none;
    transition: all 0.35s ease;
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-menu a {
    font-size: 1.2rem;
  }
}

/* ================= OVERLAY ================= */
.nav-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 900;
}

.nav-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

/* ================= BODY OFFSET ================= */
body {
  padding-top: 110px;
}

body.menu-open {
  overflow: hidden;
}