/* =========================================================
   UNISOLV — Header & Navigation
   Extracted from style.css into its own file so header/nav
   issues (especially mobile nav) are easy to find and fix
   without digging through the whole design-system file.
   Loaded on every page via includes/header.php, right after
   style.css, so it can be edited independently.
   ========================================================= */

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(252,251,254,0.9);
  border-bottom: 1px solid var(--border-soft);
}

/* Frosted-glass blur via a pseudo-element instead of directly on
   .site-header. This matters: putting backdrop-filter (or filter,
   transform, perspective, will-change:transform) directly on an
   ancestor makes THAT ancestor the "containing block" for any
   position:fixed descendant. Since the mobile nav panel below is
   position:fixed and lives inside .site-header, having the blur
   directly on .site-header collapsed the panel down to the
   header's own ~72px height instead of the full screen — which is
   exactly why it looked hidden/cut off behind the page content.
   A ::before layer gives the identical visual blur without ever
   touching .site-header's own containing-block behavior. */
.site-header::before {
  content: '';
  position: absolute; inset: 0;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  pointer-events: none;
}

.header-inner { display: flex; align-items: center; justify-content: space-between; padding: 16px 24px; position: relative; }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--font-display); font-weight: 800; font-size: 1.3rem; color: var(--ink); }
.brand img,
.brand-logo {
  display: block;
  height: 40px;
  width: auto;
  max-width: 180px;
  object-fit: contain;
}
.brand .dot { color: var(--accent); }
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav > ul { display: flex; align-items: center; gap: 2px; }
.main-nav a.nav-link {
  display: block; padding: 10px 16px; font-weight: 500; font-size: 0.92rem;
  color: var(--ink); border-radius: 100px; transition: background 0.15s, color 0.15s;
  position: relative;
}
.main-nav a.nav-link:hover, .main-nav li.active a.nav-link { background: var(--bg-alt); color: var(--primary); }

/* ---------- Categories dropdown ---------- */
.has-dropdown { position: relative; }
.nav-link-dropdown { display: flex !important; align-items: center; gap: 6px; }
.nav-link-dropdown .caret { transition: transform 0.2s ease; flex-shrink: 0; }
.has-dropdown:hover .nav-link-dropdown .caret,
.has-dropdown:focus-within .nav-link-dropdown .caret { transform: rotate(180deg); }
.nav-dropdown {
  position: absolute; top: calc(100% + 8px); left: 0;
  min-width: 240px;
  background: var(--white);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 10px;
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
  z-index: 50;
}
.has-dropdown:hover .nav-dropdown,
.has-dropdown:focus-within .nav-dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.nav-dropdown-item {
  display: block; padding: 10px 14px; border-radius: 8px;
  font-size: 0.9rem; color: var(--ink); font-weight: 500;
  transition: background 0.15s, color 0.15s;
}
.nav-dropdown-item:hover { background: var(--bg-alt); color: var(--primary); }

/* ---------- Nav search bar ---------- */
.nav-search {
  display: flex; align-items: center;
  background: var(--bg-alt);
  border: 1px solid var(--border-soft);
  border-radius: 100px;
  padding: 4px 4px 4px 16px;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.nav-search:focus-within { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(1,180,210,0.14); }
.nav-search-input {
  border: none; background: transparent; outline: none;
  font-size: 0.85rem; font-family: var(--font-body); color: var(--ink);
  width: 168px; padding: 7px 0;
}
.nav-search-input::placeholder { color: var(--text); opacity: 0.75; }
.nav-search-btn {
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px; border-radius: 50%; border: none;
  background: var(--gradient-primary); color: var(--white); flex-shrink: 0;
  transition: transform 0.15s, box-shadow 0.15s;
}
.nav-search-btn:hover { transform: scale(1.06); box-shadow: 0 4px 12px rgba(83,50,155,0.3); }

@media (max-width: 1240px) and (min-width: 981px) {
  .main-nav a.nav-link { padding: 9px 10px; font-size: 0.85rem; }
  .nav-search-input { width: 100px; }
}

/* ---------- Cart icon ---------- */
.cart-link { position: relative; display: flex; align-items: center; justify-content: center; width: 38px; height: 38px; border-radius: 50%; color: var(--ink); flex-shrink: 0; transition: background 0.15s, color 0.15s; }
.cart-link:hover { background: var(--bg-alt); color: var(--primary); }
.cart-badge {
  position: absolute; top: -2px; right: -2px;
  background: var(--accent); color: var(--white);
  font-size: 0.65rem; font-weight: 700; line-height: 1;
  min-width: 17px; height: 17px; border-radius: 100px;
  display: flex; align-items: center; justify-content: center;
  padding: 0 4px; border: 2px solid var(--white);
}

.nav-cta { display: flex; align-items: center; gap: 14px; }
.nav-toggle { display: none; background: none; border: none; padding: 8px; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--ink); margin: 5px 0; border-radius: 2px; }

@media (max-width: 980px) {
  .nav-toggle { display: block; }
  .main-nav {
    position: fixed;
    top: 72px; left: 0; right: 0; bottom: 0;
    width: 100%;
    background: var(--white);
    flex-direction: column; align-items: stretch; justify-content: flex-start;
    padding: 20px 24px;
    transform: translateY(-110%);
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.25s ease, visibility 0s linear 0.25s;
    overflow-y: auto;
    z-index: 99;
    box-sizing: border-box;
  }
  .main-nav.open {
    transform: translateY(0);
    visibility: visible;
    pointer-events: auto;
    transition: transform 0.25s ease, visibility 0s linear 0s;
  }
  .main-nav > ul { width: 100%; flex-direction: column; align-items: stretch; gap: 4px; }
  .main-nav a.nav-link { width: 100%; box-sizing: border-box; }
  .nav-cta { width: 100%; flex-direction: column; align-items: stretch; margin-top: 18px; gap: 12px; }
  .nav-cta .btn { width: 100%; text-align: center; }
  .nav-cta .cart-link {
    width: 100%; height: auto; border-radius: 10px; justify-content: flex-start; gap: 10px;
    padding: 12px 14px; background: var(--bg-alt); order: -1;
  }
  .nav-cta .cart-link::after { content: "View Cart"; font-size: 0.9rem; font-weight: 600; }
  .nav-cta .cart-link .cart-badge { position: static; margin-left: auto; border: none; }

  /* Categories dropdown: hover doesn't exist on touch, so show it inline & expanded */
  .nav-dropdown {
    position: static; opacity: 1; visibility: visible; transform: none;
    box-shadow: none; border: none; background: var(--bg-alt);
    margin-top: 4px; padding: 6px;
  }
  .has-dropdown:hover .nav-link-dropdown .caret,
  .has-dropdown:focus-within .nav-link-dropdown .caret { transform: none; }

  /* Search bar: full width, stretched to match the rest of the mobile panel */
  .nav-search { width: 100%; box-sizing: border-box; padding: 4px 4px 4px 18px; }
  .nav-search-input { width: 100%; flex: 1; }
}