/* ============================================
   NAVBAR - Sticky Navigation with Active States
   ============================================ */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: var(--z-nav);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: all var(--duration-normal) var(--ease-out);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.96);
  border-bottom-color: var(--c-border);
  box-shadow: var(--shadow-sm);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 0.5rem;
}

/* ── Logo ── */
.navbar__logo {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--ff-heading);
  font-weight: var(--fw-extrabold);
  font-size: 1.35rem;
  color: var(--c-dark);
  flex-shrink: 0;
  z-index: 2;
}

.navbar__logo .logo-mark-img {
  width: 42px;
  height: 42px;
  display: block;
}

.navbar__logo .logo-text span {
  color: var(--c-primary);
}

/* ── Nav Links ── */
.navbar__links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.navbar__links a {
  font-family: var(--ff-heading);
  font-size: var(--fs-body-sm);
  font-weight: var(--fw-medium);
  color: var(--c-text-secondary);
  padding: 6px 8px;
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
  position: relative;
  display: block;
  white-space: nowrap;
}

.navbar__links a:hover,
.navbar__links a.active {
  color: var(--c-primary);
  background: var(--c-primary-50);
}

.navbar__links a::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--c-primary);
  border-radius: var(--radius-full);
  transition: all var(--duration-fast) var(--ease-out);
  transform: translateX(-50%);
}

.navbar__links a:hover::after,
.navbar__links a.active::after {
  width: 20px;
}

/* ── Actions ── */
.navbar__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  flex-shrink: 0;
}

/* ── Mobile Toggle ── */
.navbar__toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--sp-2);
  z-index: 2;
}

.navbar__toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-dark);
  border-radius: var(--radius-full);
  transition: all var(--duration-normal) var(--ease-out);
  transform-origin: center;
}

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

.navbar__toggle.active span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

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

/* ── Mobile Menu ── */
.navbar__mobile {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  height: 100dvh;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--sp-6);
  transition: right var(--duration-normal) var(--ease-out);
  z-index: 1;
}

.navbar__mobile.open {
  right: 0;
}

.navbar__mobile a {
  font-family: var(--ff-heading);
  font-size: 1.5rem;
  font-weight: var(--fw-semibold);
  color: var(--c-dark);
  padding: var(--sp-3) var(--sp-6);
  transition: color var(--duration-fast);
}

.navbar__mobile a:hover,
.navbar__mobile a.active {
  color: var(--c-primary);
}

.navbar__mobile .btn {
  margin-top: var(--sp-4);
}