/* ============================================
   Mobile Navigation — Hamburger + Slide Drawer
   ============================================ */

.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-100);
  padding: var(--space-3) var(--container-padding);
}

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
}

.nav__brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav__logo {
  width: 32px;
  height: 32px;
}

.nav__name {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.nav__name span {
  color: var(--color-accent);
}

/* Hamburger Button */
.nav__toggle {
  width: 40px;
  height: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  z-index: calc(var(--z-modal) + 1);
}

.nav__toggle-bar {
  width: 22px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

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

.nav__toggle.active .nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

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

/* Search */
.nav__search {
  flex: 1;
  position: relative;
}

.nav__search-input {
  width: 100%;
  padding: 8px 12px 8px 36px;
  font-size: var(--font-size-sm);
  border: 1.5px solid var(--color-gray-200);
  border-radius: var(--radius-full);
  background: var(--color-gray-50);
  transition: border-color var(--transition-fast);
}

.nav__search-input:focus {
  border-color: var(--color-primary);
  background: var(--color-white);
}

.nav__search-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  font-size: 14px;
}

/* Slide Drawer Overlay */
.nav__overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: var(--z-overlay);
}

.nav__overlay.active {
  opacity: 1;
  visibility: visible;
}

/* Slide Drawer */
.nav__drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 320px;
  height: 100%;
  background: var(--color-white);
  z-index: var(--z-modal);
  transition: right var(--transition-base);
  padding: var(--space-16) var(--space-6) var(--space-6);
  overflow-y: auto;
  box-shadow: var(--shadow-xl);
}

.nav__drawer.active {
  right: 0;
}

.nav__drawer-header {
  margin-bottom: var(--space-8);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-gray-100);
}

.nav__drawer-brand {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

.nav__drawer-brand span {
  color: var(--color-accent);
}

.nav__links {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.nav__link {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--text-primary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav__link:hover,
.nav__link.active {
  background: var(--color-primary-bg);
  color: var(--color-primary);
}

.nav__link-icon {
  width: 20px;
  text-align: center;
  font-size: 16px;
}

.nav__drawer-cta {
  margin-top: var(--space-8);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-gray-100);
}