/* ============================================================
   NAVBAR.CSS — Top navigation bar (transparent → solid on scroll)
   ============================================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  transition: background var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out),
              backdrop-filter var(--duration-base) var(--ease-out);
}

/* Transparent state — over hero */
.navbar--transparent {
  background: transparent;
}

/* Solid state — after scrolling */
.navbar--scrolled {
  background: var(--color-primary);
  box-shadow: 0 2px 24px rgba(8, 27, 51, 0.30);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-height);
  gap: var(--space-8);
}

/* ── Logo ── */
.navbar__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.navbar__logo-icon {
  width: 36px;
  height: 36px;
  color: var(--color-accent);
}

.navbar__logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.navbar__logo-name {
  font-family: var(--font-heading);
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-text-light);
  letter-spacing: 0.06em;
}

.navbar__logo-sub {
  font-size: 0.6rem;
  font-weight: var(--weight-medium);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-top: 2px;
}

/* ── Desktop Nav Links ── */
.navbar__links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
}

.navbar__link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: rgba(255, 255, 255, 0.82);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
  position: relative;
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  right: 50%;
  height: 2px;
  background: var(--color-accent);
  border-radius: var(--radius-pill);
  transition: left var(--duration-base) var(--ease-out),
              right var(--duration-base) var(--ease-out);
}

.navbar__link:hover,
.navbar__link.active {
  color: var(--color-text-light);
}

.navbar__link:hover::after,
.navbar__link.active::after {
  left: var(--space-3);
  right: var(--space-3);
}

/* ── Actions (CTA + hamburger) ── */
.navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}

/* ── Hamburger Button ── */
.navbar__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: var(--transition-fast);
}

.navbar__hamburger span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-text-light);
  border-radius: var(--radius-pill);
  transform-origin: center;
  transition: transform var(--duration-base) var(--ease-out),
              opacity var(--duration-base) var(--ease-out),
              width var(--duration-base) var(--ease-out);
}

.navbar__hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.navbar__hamburger.open span:nth-child(2) {
  opacity: 0;
  width: 0;
}

.navbar__hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Mobile Menu ── */
.navbar__mobile {
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-primary-dark);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  transform: translateX(100%);
  transition: transform var(--duration-slow) var(--ease-out);
  z-index: 999;
}

.navbar__mobile.open {
  transform: translateX(0);
}

.navbar__mobile-links {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
  width: 100%;
}

.navbar__mobile-link {
  font-family: var(--font-heading);
  font-size: var(--text-3xl);
  font-weight: var(--weight-bold);
  color: rgba(255, 255, 255, 0.80);
  padding: var(--space-3) var(--space-8);
  width: 100%;
  text-align: center;
  transition: var(--transition-fast);
}

.navbar__mobile-link:hover,
.navbar__mobile-link.active {
  color: var(--color-accent);
}

/* ── Responsive ── */
@media (max-width: 900px) {
  .navbar__links {
    display: none;
  }

  .navbar__hamburger {
    display: flex;
  }
}

@media (max-width: 640px) {
  .navbar__actions .btn {
    display: none;
  }
}