/* ============================================
   iAgentMart — Navigation
   ============================================ */

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  z-index: 1000;
  background: rgba(250, 251, 253, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: all var(--duration-normal) var(--ease-out);
}

.nav--scrolled {
  border-bottom-color: var(--color-border-light);
  box-shadow: var(--shadow-sm);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

/* --- Logo --- */
.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-icon {
  width: 36px;
  height: 36px;
}

.nav__logo-text {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.nav__logo-text span {
  color: var(--color-primary);
}

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

.nav__link {
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-text-secondary);
  padding: 8px 14px;
  border-radius: var(--radius-md);
  transition: all var(--duration-fast) var(--ease-out);
  text-decoration: none;
}

.nav__link:hover {
  color: var(--color-text);
  background: var(--color-surface-raised);
}

.nav__link--active {
  color: var(--color-primary);
  background: var(--color-primary-light);
}

/* --- Actions --- */
.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.nav__github {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: all var(--duration-fast) var(--ease-out);
}

.nav__github:hover {
  background: var(--color-surface-raised);
  color: var(--color-text);
}

.nav__github svg {
  width: 20px;
  height: 20px;
}

/* --- Mobile Toggle --- */
.nav__toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  cursor: pointer;
}

.nav__toggle-bar {
  position: relative;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: all var(--duration-normal) var(--ease-out);
}

.nav__toggle-bar::before,
.nav__toggle-bar::after {
  content: '';
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: all var(--duration-normal) var(--ease-out);
}

.nav__toggle-bar::before { top: -7px; }
.nav__toggle-bar::after  { top: 7px; }

/* Open state */
.nav__toggle--open .nav__toggle-bar {
  background: transparent;
}

.nav__toggle--open .nav__toggle-bar::before {
  top: 0;
  transform: rotate(45deg);
}

.nav__toggle--open .nav__toggle-bar::after {
  top: 0;
  transform: rotate(-45deg);
}

/* --- Mobile Menu --- */
.nav__mobile {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-surface);
  padding: var(--space-6);
  flex-direction: column;
  gap: var(--space-2);
  z-index: 999;
  opacity: 0;
  transform: translateY(-10px);
  transition: all var(--duration-normal) var(--ease-out);
}

.nav__mobile--open {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}

.nav__mobile .nav__link {
  font-size: var(--text-lg);
  padding: var(--space-4) var(--space-4);
}

.nav__mobile .nav__actions {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-border-light);
}

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

  .nav__toggle {
    display: flex;
  }

  .nav__mobile .nav__actions {
    display: flex;
    width: 100%;
  }

  .nav__mobile .btn {
    width: 100%;
  }
}