/* ============================================
   PURFORM — Navigation
   ============================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 200;
  height: var(--nav-h);
  background: rgba(232, 229, 223, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--ink-12);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--sp-32);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-32);
}

/* Logo */
.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--sp-12);
  flex-shrink: 0;
}

.nav-logo-mark {
  width: 38px;
  height: 38px;
}

.nav-logo-text {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1;
}

.nav-logo-text .pur { color: var(--green-deep); }
.nav-logo-text .form { color: var(--green-lime); }

/* Links */
.nav-links {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  flex: 1;
  justify-content: center;
}

.nav-link {
  font-family: var(--font-head);
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  padding: 8px 14px;
  border-radius: var(--r-sm);
  transition: background 0.18s var(--ease), color 0.18s var(--ease);
}

.nav-link:hover,
.nav-link.active {
  background: var(--ink-06);
  color: var(--green-deep);
}

/* Actions */
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--sp-12);
  flex-shrink: 0;
}

.nav-cart-btn {
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: var(--r-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  transition: background 0.18s var(--ease);
}
.nav-cart-btn:hover { background: var(--ink-06); }

.cart-count {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--green-lime);
  color: var(--green-dark);
  font-size: 10px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
  display: none;
}
.cart-count.visible { display: flex; }

/* Mobile toggle */
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--r-sm);
  background: transparent;
  flex-direction: column;
  gap: 5px;
  transition: background 0.18s;
}
.nav-toggle:hover { background: var(--ink-06); }
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.25s var(--ease), opacity 0.25s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Mobile drawer */
.nav-drawer {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: var(--cream);
  border-bottom: 1px solid var(--ink-12);
  padding: var(--sp-20) var(--sp-20) var(--sp-32);
  z-index: 199;
  flex-direction: column;
  gap: var(--sp-4);
}
.nav-drawer.open { display: flex; }
.nav-drawer .nav-link {
  font-size: 16px;
  padding: 12px 16px;
}
.nav-drawer .btn { width: 100%; margin-top: var(--sp-12); }

@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-inner { padding: 0 var(--sp-20); }
}