.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  background: transparent;
  border-bottom: 1px solid transparent;
}

.header.scrolled {
  background: var(--surface);
  border-bottom-color: var(--border-light);
  box-shadow: 0 1px 20px rgba(15, 36, 24, 0.06);
}

.inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  gap: 32px;
}

/* === Logo === */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--green-800);
  transition: color var(--transition-fast);
}

/* When nav is on top of dark hero (not yet scrolled), logo should be light */
.header:not(.scrolled) .logo:not(:hover) {
  color: #FEFCF8;
}

.logo:hover {
  color: var(--green-600);
}

.logoIcon {
  display: flex;
  align-items: center;
  color: var(--green-700);
}

.header:not(.scrolled) .logoIcon {
  color: var(--green-400);
}

.logoText {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: inherit;
}

/* === Desktop nav === */
.desktopNav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
}

.navLink {
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.navLink:hover {
  color: var(--green-700);
  background: var(--green-50);
}

.header:not(.scrolled) .navLink {
  color: rgba(254, 252, 248, 0.75);
}

.header:not(.scrolled) .navLink:hover {
  color: #FEFCF8;
  background: rgba(255, 255, 255, 0.1);
}

/* === Actions === */
.actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.launchBtn {
  font-family: var(--font-ui);
  font-size: 14px;
  font-weight: 600;
  color: #FEFCF8;
  background: var(--green-700);
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  border: 1.5px solid var(--green-700);
  transition: background var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
}

.launchBtn:hover {
  background: var(--green-600);
  border-color: var(--green-600);
  color: #FEFCF8;
  transform: translateY(-1px);
}

/* === Hamburger === */
.mobileMenuBtn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--border);
  background: var(--surface-warm);
  cursor: pointer;
  padding: 0;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.mobileMenuBtn:hover {
  border-color: var(--green-600);
  background: var(--green-50);
}

.hamburger,
.hamburger::before,
.hamburger::after {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.22s ease, opacity 0.22s ease;
  position: relative;
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  left: 0;
}

.hamburger::before { top: -5px; }
.hamburger::after  { top: 5px; }

.hamburgerOpen {
  background: transparent;
}
.hamburgerOpen::before {
  transform: rotate(45deg) translate(3.5px, 3.5px);
}
.hamburgerOpen::after {
  transform: rotate(-45deg) translate(3.5px, -3.5px);
}

/* === Mobile overlay === */
.mobileOverlay {
  position: fixed;
  inset: 0;
  background: rgba(15, 36, 24, 0.4);
  backdrop-filter: blur(4px);
  z-index: 98;
  animation: fadeIn 0.2s ease;
}

/* === Mobile drawer === */
.mobileMenu {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 280px;
  max-width: 90vw;
  background: var(--surface);
  border-left: 1px solid var(--border);
  z-index: 99;
  transform: translateX(100%);
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: -4px 0 32px rgba(15, 36, 24, 0.12);
}

.mobileMenuOpen {
  transform: translateX(0);
}

.mobileMenuInner {
  display: flex;
  flex-direction: column;
  padding: 88px 24px 32px;
  gap: 4px;
}

.mobileNavLink {
  font-family: var(--font-ui);
  font-size: 16px;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 14px 16px;
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.mobileNavLink:hover {
  color: var(--green-700);
  background: var(--green-50);
}

.mobileLaunchBtn {
  display: block;
  margin-top: 16px;
  font-family: var(--font-ui);
  font-size: 15px;
  font-weight: 600;
  color: #FEFCF8;
  background: var(--green-700);
  padding: 13px 20px;
  border-radius: var(--radius-pill);
  text-align: center;
  transition: background var(--transition-fast);
}

.mobileLaunchBtn:hover {
  background: var(--green-600);
  color: #FEFCF8;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* === Responsive === */
@media (max-width: 768px) {
  .desktopNav,
  .launchBtn {
    display: none;
  }

  .mobileMenuBtn {
    display: flex;
  }

  .inner {
    gap: 16px;
  }
}

@media (max-width: 480px) {
  .inner {
    padding: 0 16px;
  }
}