/* ===== Universal Navigation Styles from zarstech-home.html ===== */
:root {
  --ink: #1d1d1f;
  --ink-2: #6e6e73;
  --ink-3: #86868b;
  --bg: #ffffff;
  --bg-2: #f5f5f7;
  --line: #d2d2d7;
  --accent: #0071e3;
  --accent-h: #0077ed;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", Inter, "Helvetica Neue", Arial, sans-serif;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  width: 100%;
  box-sizing: border-box;
  font-family: var(--font);
}
.nav * {
  box-sizing: border-box;
}
.nav .wide {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 22px;
}
.nav-in {
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.nav .logo {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--ink);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: -0.01em;
  text-decoration: none;
}
.nav .logo:hover {
  text-decoration: none;
}
.nav .logo-mark {
  width: 26px;
  height: 18px;
  color: #1d1f26;
  display: block;
  transition: transform 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.nav .logo-mark svg {
  width: 100%;
  height: 100%;
  display: block;
}
.nav .logo:hover .logo-mark {
  transform: scale(1.08);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  font-size: 13px;
}
.nav-links a {
  color: var(--ink);
  opacity: 0.8;
  text-decoration: none;
  transition: opacity 0.15s;
}
.nav-links a:hover {
  opacity: 1;
  text-decoration: none;
}
.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-radius: 980px;
  font-weight: 500;
  white-space: nowrap;
  transition: background 0.2s, transform 0.2s;
  text-decoration: none;
}
.nav .btn-primary {
  background: var(--accent);
  color: #fff;
}
.nav .btn-primary:hover {
  background: var(--accent-h);
  text-decoration: none;
}
.nav .btn-sm {
  font-size: 13px;
  padding: 7px 15px;
}
.nav .btn-lg {
  font-size: 17px;
  padding: 13px 26px;
  min-height: 48px;
}
.nav .menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  border: 0;
  background: none;
  cursor: pointer;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
}
.nav .menu-btn span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  position: relative;
  transition: 0.25s;
}
.nav .menu-btn span::before,
.nav .menu-btn span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 1.5px;
  background: var(--ink);
  transition: 0.25s;
}
.nav .menu-btn span::before {
  top: -6px;
}
.nav .menu-btn span::after {
  top: 6px;
}
.nav.open .menu-btn span {
  background: transparent;
}
.nav.open .menu-btn span::before {
  top: 0;
  transform: rotate(45deg);
}
.nav.open .menu-btn span::after {
  top: 0;
  transform: rotate(-45deg);
}
.nav .mobile-menu {
  display: none;
}

/* Products dropdown */
.nav .dd-trigger {
  font: inherit;
  font-size: 13px;
  color: var(--ink);
  opacity: 0.8;
  background: none;
  border: 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 0;
  transition: opacity 0.15s;
}
.nav .dd-trigger svg {
  transition: transform 0.25s;
}
.nav .dd-trigger:hover,
.nav.dd-open .dd-trigger {
  opacity: 1;
}
.nav.dd-open .dd-trigger svg {
  transform: rotate(180deg);
}
.nav .dd {
  position: absolute;
  left: 0;
  right: 0;
  top: 100%;
  background: rgba(255, 255, 255, 0.985);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.08);
  box-shadow: 0 30px 60px -30px rgba(0, 0, 0, 0.18);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-6px);
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  z-index: 1001;
}
.nav.dd-open .dd {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: none;
}

/* Modern CSS hover fallback for desktop */
@media (hover: hover) {
  .nav:has(#prodBtn:hover) .dd,
  .nav:has(#prodMenu:hover) .dd {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: none;
  }
  .nav:has(#prodBtn:hover) .dd-trigger svg,
  .nav:has(#prodMenu:hover) .dd-trigger svg {
    transform: rotate(180deg);
  }
  .nav:has(#prodBtn:hover) .dd-trigger {
    opacity: 1;
  }
}

.nav .dd-in {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 22px 22px 6px;
}
.nav .dd-all {
  text-align: center;
  padding: 4px 0 20px;
  font-size: 13px;
}
.nav .chip {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  min-width: 104px;
  padding: 12px 10px;
  border-radius: 14px;
  color: var(--ink);
  font-size: 12px;
  text-decoration: none;
  transition: background 0.2s;
}
.nav .chip:hover {
  background: var(--bg-2);
  text-decoration: none;
}
.nav .chip svg {
  width: 34px;
  height: 34px;
}
.nav .link-arrow {
  color: var(--accent);
  text-decoration: none;
  font-size: 13px;
}
.nav .link-arrow::after {
  content: " ›";
}
.nav .link-arrow:hover {
  text-decoration: underline;
}
.nav .m-prod {
  display: none;
}
.nav .m-chips {
  display: none;
}

@media (max-width: 820px) {
  .nav .nav-links,
  .nav .nav-right .btn {
    display: none;
  }
  .nav .menu-btn {
    display: flex;
  }
  .nav .mobile-menu {
    display: block;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
    background: rgba(255, 255, 255, 0.98);
  }
  .nav.open .mobile-menu {
    max-height: 720px;
  }
  .nav .mobile-menu a {
    display: block;
    padding: 14px 22px;
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    text-decoration: none;
  }
  .nav .mobile-menu a.btn {
    margin: 14px 22px 22px;
    display: flex;
    font-size: 16px;
    color: #fff;
  }
  .nav .dd {
    display: none;
  }
  .nav .m-prod {
    display: flex;
    width: 100%;
    justify-content: space-between;
    align-items: center;
    padding: 14px 22px;
    font: inherit;
    font-size: 18px;
    font-weight: 600;
    color: var(--ink);
    background: none;
    border: 0;
    border-top: 1px solid rgba(0, 0, 0, 0.06);
    cursor: pointer;
    text-align: left;
  }
  .nav .m-prod svg {
    transition: transform 0.25s;
  }
  .nav .m-prod[aria-expanded="true"] svg {
    transform: rotate(180deg);
  }
  .nav .m-chips {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
    padding: 0 14px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s;
  }
  .nav .m-chips.open {
    max-height: 260px;
    padding: 4px 14px 14px;
  }
  .nav .mobile-menu .m-chips a.chip {
    display: flex;
    border: 0;
    padding: 12px 6px;
    font-size: 13px;
    font-weight: 500;
  }
}