/* ==========================================================================
   HEADER — ecosystem switcher, sticky header, search, nav, mobile menu,
   mobile app-style bottom navigation
   ========================================================================== */

/* --------------------------------------------------------------------
   1. Ecosystem switcher bar
   -------------------------------------------------------------------- */
.eco-switcher {
  background: var(--c-emerald-dark);
  color: rgba(255, 255, 255, 0.7);
  height: var(--switcher-height);
  font-size: var(--fs-small);
  font-weight: 600;
  letter-spacing: 0.02em;
  position: sticky;
  top: 0;
  z-index: 60;
  transition: margin-top var(--dur) var(--ease);
}

/* Hides upward on scroll-down, reappears on scroll-up (class toggled by main.js) */
body.is-scrolling-down .eco-switcher {
  margin-top: calc(-1 * var(--switcher-height));
}

.eco-switcher__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--sp-3);
}

.eco-switcher__link {
  color: inherit;
  text-decoration: none;
  padding: var(--sp-1) var(--sp-3);
  border-radius: var(--radius-pill);
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.eco-switcher__link:hover { color: var(--c-white); }

.eco-switcher__link--active {
  color: var(--c-emerald-dark);
  background: var(--c-gold);
  font-weight: 700;
}

.eco-switcher__sep {
  color: rgba(255, 255, 255, 0.3);
}

/* --------------------------------------------------------------------
   2. Main header
   -------------------------------------------------------------------- */
.site-header {
  background: var(--c-cream);
  border-bottom: 1px solid var(--c-border);
  position: sticky;
  top: var(--switcher-height);
  z-index: 50;
  transition: top var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
body.is-scrolling-down .site-header { top: 0; }
body.is-scrolled .site-header { box-shadow: 0 2px 12px rgba(14,63,51,0.06); }

.site-header__inner {
  display: grid;
  grid-template-columns: auto 1fr auto auto;
  align-items: center;
  gap: var(--sp-5);
  min-height: var(--header-height);
}

.site-header__logo img { max-height: 48px; width: auto; }
.site-header__site-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--c-emerald);
  white-space: nowrap;
}

/* --------------------------------------------------------------------
   3. Search (with live suggestions)
   -------------------------------------------------------------------- */
.site-header__search {
  position: relative;
  max-width: 560px;
  width: 100%;
}

.search-form {
  display: flex;
  align-items: center;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-pill);
  padding: var(--sp-1) var(--sp-1) var(--sp-1) var(--sp-4);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.search-form:focus-within {
  border-color: var(--c-emerald);
  box-shadow: 0 0 0 3px var(--c-emerald-tint);
}

.search-form__input {
  flex: 1;
  border: none;
  outline: none;
  background: transparent;
  font-family: var(--font-body);
  font-size: var(--fs-body);
  color: var(--c-charcoal);
  padding: 10px 0;
}
.search-form__input::placeholder { color: var(--c-muted); }

.search-form__submit {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: none;
  border-radius: 50%;
  background: var(--c-emerald);
  color: var(--c-white);
  cursor: pointer;
  flex-shrink: 0;
  transition: background var(--dur) var(--ease);
}
.search-form__submit:hover { background: var(--c-emerald-light); }

/* Live suggestion dropdown */
.search-suggestions {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card-hover);
  z-index: 70;
  max-height: 70vh;
  overflow-y: auto;
}

.search-suggestions__item {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding: var(--sp-2) var(--sp-3);
  text-decoration: none;
  color: var(--c-charcoal);
  border-bottom: 1px solid var(--c-border);
}
.search-suggestions__item:last-of-type { border-bottom: none; }
.search-suggestions__item:hover,
.search-suggestions__item.is-active {
  background: var(--c-emerald-tint);
}
.search-suggestions__item img {
  width: 48px;
  height: 32px;
  object-fit: cover;
  border-radius: 4px;
  flex-shrink: 0;
  background: var(--c-emerald-tint);
}
.search-suggestions__meta { flex: 1; min-width: 0; }
.search-suggestions__title {
  font-weight: 600;
  font-size: var(--fs-small);
  display: block;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.search-suggestions__author {
  font-size: 0.75rem;
  color: var(--c-muted);
}
.search-suggestions__price {
  font-size: var(--fs-small);
  font-weight: 700;
  color: var(--c-emerald);
  white-space: nowrap;
}
.search-suggestions__viewall {
  display: block;
  text-align: center;
  padding: var(--sp-2);
  font-weight: 700;
  font-size: var(--fs-small);
  color: var(--c-emerald);
  text-decoration: none;
}
.search-suggestions__empty {
  padding: var(--sp-3);
  text-align: center;
  color: var(--c-muted);
  font-size: var(--fs-small);
}

/* --------------------------------------------------------------------
   4. Primary nav
   -------------------------------------------------------------------- */
.primary-menu {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  list-style: none;
  margin: 0;
  padding: 0;
}

.primary-menu__item { position: relative; }

.primary-menu__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-weight: 600;
  font-size: var(--fs-small);
  color: var(--c-charcoal);
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--sp-2) 0;
  font-family: var(--font-body);
  white-space: nowrap;
  text-decoration: none;
}
.primary-menu a:hover,
.primary-menu__link:hover { color: var(--c-emerald); }

/* --------------------------------------------------------------------
   5. Header action icons + Apply Now button
   -------------------------------------------------------------------- */
.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--sp-2);
}

.header-icon {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: var(--c-emerald-dark);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.header-icon:hover { background: var(--c-emerald-tint); color: var(--c-emerald); }
.header-icon__label { display: none; }

.header-icon__badge {
  position: absolute;
  top: 0;
  right: 0;
  min-width: 18px;
  height: 18px;
  border-radius: 999px;
  background: var(--c-gold);
  color: var(--c-emerald-dark);
  font-size: 0.6875rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 4px;
  line-height: 1;
}
.header-icon__badge[hidden] { display: none; }

.site-header__apply { white-space: nowrap; }

/* --------------------------------------------------------------------
   6. Mobile menu toggle + drawer
   -------------------------------------------------------------------- */
.mobile-menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border: none;
  background: none;
  cursor: pointer;
  padding: 0;
}
.mobile-menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--c-emerald-dark);
  border-radius: 2px;
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
}
.mobile-menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.mobile-menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.mobile-menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  height: 100%;
  width: min(86vw, 360px);
  background: var(--c-white);
  z-index: 110;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform var(--dur) var(--ease);
  box-shadow: -8px 0 24px rgba(14,63,51,0.12);
}
.mobile-menu.is-open { transform: translateX(0); }
.mobile-menu[hidden] { display: flex; }

.mobile-menu__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--sp-4);
  border-bottom: 1px solid var(--c-border);
}
.mobile-menu__title { font-family: var(--font-display); font-size: 1.25rem; font-weight: 700; color: var(--c-emerald); }
.mobile-menu__close {
  border: none; background: none; font-size: 1.75rem; line-height: 1; cursor: pointer; color: var(--c-muted);
}

.mobile-menu__body {
  padding: var(--sp-4);
  overflow-y: auto;
  flex: 1;
}

.mobile-accordion summary {
  font-weight: 700;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  color: var(--c-emerald-dark);
  cursor: pointer;
  padding: var(--sp-2) 0;
}
.mobile-accordion__list { list-style: none; padding: 0 0 var(--sp-3) var(--sp-2); margin: 0; }
.mobile-accordion__list li { padding: var(--sp-1) 0; }
.mobile-accordion__list a { color: var(--c-charcoal); font-size: var(--fs-small); }

.mobile-menu__links { list-style: none; padding: var(--sp-3) 0 0; margin: 0; border-top: 1px solid var(--c-border); }
.mobile-menu__links li { padding: var(--sp-2) 0; }
.mobile-menu__links a { font-weight: 600; color: var(--c-charcoal); }

.mobile-menu-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(10, 46, 38, 0.4);
  z-index: 100;
}
.mobile-menu-backdrop[hidden] { display: none; }

/* --------------------------------------------------------------------
   7. Floating WhatsApp button
   -------------------------------------------------------------------- */
.whatsapp-float {
  position: fixed;
  bottom: calc(var(--sp-4) + var(--bottom-nav-height));
  right: var(--sp-4);
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: #25D366;
  color: var(--c-white);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 16px rgba(0,0,0,0.18);
  z-index: 90;
  transition: transform var(--dur) var(--ease);
}
.whatsapp-float:hover { transform: scale(1.06); }

@media (min-width: 769px) {
  .whatsapp-float { bottom: var(--sp-4); }
}

/* --------------------------------------------------------------------
   8. Mobile app-style bottom navigation
   -------------------------------------------------------------------- */
.app-bottom-nav {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: var(--bottom-nav-height);
  background: var(--c-white);
  border-top: 1px solid var(--c-border);
  z-index: 95;
  box-shadow: 0 -4px 16px rgba(14,63,51,0.06);
}
.app-bottom-nav__item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  color: var(--c-muted);
  font-size: 0.6875rem;
  font-weight: 600;
  border: none;
  background: none;
  cursor: pointer;
  text-decoration: none;
  padding: 0;
}
.app-bottom-nav__item.is-active { color: var(--c-emerald); }

@media (max-width: 768px) {
  .app-bottom-nav { display: flex; }
}

/* --------------------------------------------------------------------
   9. Responsive
   -------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .site-header__inner {
    grid-template-columns: auto 1fr auto;
    gap: var(--sp-3);
  }
  .site-header__nav { display: none; }
  .mobile-menu-toggle { display: flex; }
}

@media (max-width: 640px) {
  .site-header__inner {
    grid-template-columns: auto auto;
    grid-template-rows: auto auto;
    row-gap: var(--sp-2);
  }
  .site-header__logo { grid-column: 1; grid-row: 1; }
  .site-header__actions { grid-column: 2; grid-row: 1; justify-content: flex-end; }
  .site-header__search { grid-column: 1 / -1; grid-row: 2; }
  .site-header__apply { display: none; } /* Apply Now lives in the bottom CTA + bottom nav on mobile */
  :root { --header-height: auto; }
}