.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 1.2rem 0;
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
}

.header.scrolled {
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  padding: 0.8rem 0;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 0.6em;
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--color-white);
  transition: color var(--transition);
}

.header.scrolled .header__logo {
  color: var(--color-primary-dark);
}

.header__logo svg {
  width: 32px; height: 32px;
  flex-shrink: 0;
}

.header__logo .logo-en {
  font-size: 0.6em;
  font-weight: 400;
  letter-spacing: 0.1em;
  opacity: 0.75;
  display: block;
  line-height: 1;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.header__nav a {
  font-size: var(--size-sm);
  font-weight: 500;
  color: rgba(255,255,255,0.9);
  transition: color var(--transition);
  position: relative;
}
.header__nav a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 2px;
  background: var(--color-accent);
  transform: scaleX(0);
  transition: transform var(--transition);
}
.header__nav a:hover::after { transform: scaleX(1); }
.header__nav a:hover { color: var(--color-white); }

.header.scrolled .header__nav a { color: var(--color-text-mid); }
.header.scrolled .header__nav a:hover { color: var(--color-primary); }

.header__cta {
  font-size: var(--size-sm);
  padding: 0.6em 1.4em;
  background: var(--color-accent);
  color: var(--color-white);
  border-radius: var(--radius-full);
  font-weight: 700;
  transition: all var(--transition);
  box-shadow: 0 2px 10px rgba(139,195,74,0.4);
}
.header__cta:hover {
  background: #7cb342;
  transform: translateY(-1px);
}

.header__menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.header__menu-toggle span {
  display: block;
  width: 24px; height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: all var(--transition);
}
.header.scrolled .header__menu-toggle span { background: var(--color-primary-dark); }