/* ============================================================
   NAVBAR
   Fixed top bar — transparent by default, frosted-glass on scroll.
   JS adds `.scrolled` class after 60px scroll (Step 12).
============================================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background-color var(--transition-normal),
              border-color var(--transition-normal),
              backdrop-filter var(--transition-normal);
  border-bottom: var(--border-width) solid transparent;
}

/* Frosted-glass state triggered by JS scroll */
.navbar.scrolled {
  background-color: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--color-border);
}

/* --- Inner layout --- */
.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin-inline: auto;
  padding: var(--space-5) var(--section-padding-x);
}

/* --- Logo --- */
.navbar__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.navbar__logo-img {
  height: 36px;
  width: auto;
  display: block;
}

.navbar__logo-name {
  font-size: var(--text-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-left: var(--space-2);
  letter-spacing: -0.01em;
}

.navbar__logo-accent {
  color: var(--color-accent);
}

/* --- Nav links --- */
.navbar__links {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
}

.navbar__links a {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.navbar__links a:hover {
  color: var(--color-text);
}

/* --- CTA button --- */
.navbar__cta {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-bg);
  background-color: var(--color-accent);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--border-radius-sm);
  text-decoration: none;
  transition: opacity var(--transition-fast);
}

.navbar__cta:hover {
  opacity: 0.85;
}

/* --- Hamburger (mobile) --- */
.navbar__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: var(--space-1);
  width: 28px;
  height: 28px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

.navbar__hamburger span {
  display: block;
  width: 100%;
  height: 1px;
  background-color: var(--color-text);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* --- Responsive --- */
@media (max-width: 768px) {
  .navbar__links {
    display: none;
  }

  /* Mobile menu open state */
  .navbar__links--open {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.97);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: var(--border-width) solid var(--color-border);
    padding: var(--space-6) var(--section-padding-x);
  }

  .navbar__links--open a {
    font-size: var(--text-base);
  }

  .navbar__cta {
    display: none;
  }

  .navbar__cta--mobile-open {
    display: inline-block;
    margin-top: var(--space-2);
  }

  .navbar__hamburger {
    display: flex;
  }
}