/**
 * AVENZA FIBER LLP - Header & Navigation Styles
 * Strict 3-zone Top Bar Contract:
 * [Brand Wordmark / Logo] — [Nav Links: Home, About, Product, Applications, Contact] — [Catalog PDF & Quote CTA]
 */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  width: 100%;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.6);
  box-shadow: 0 4px 20px -2px rgba(42, 48, 60, 0.05);
  transition: all var(--transition-normal);
}

.site-header--scrolled {
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 10px 32px -8px rgba(42, 48, 60, 0.12);
  border-bottom-color: rgba(42, 48, 60, 0.1);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 82px;
  gap: 1rem;
}

@media (max-width: 768px) {
  .header__inner {
    height: 68px;
  }
}

/* Zone 1: Brand Logo / Wordmark */
.header__brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  text-decoration: none;
  min-height: 44px;
}

.header__logo {
  height: 48px;
  width: auto;
  max-width: 220px;
  object-fit: contain;
  transition: transform var(--transition-fast);
}

@media (max-width: 768px) {
  .header__logo {
    height: 40px;
    max-width: 170px;
  }
}

@media (max-width: 375px) {
  .header__logo {
    height: 36px;
    max-width: 145px;
  }
}

.header__brand:hover .header__logo {
  transform: scale(1.02);
}

/* Zone 2: Navigation Links */
.header__nav {
  display: none;
}

@media (min-width: 992px) {
  .header__nav {
    display: flex;
    align-items: center;
    gap: clamp(1.25rem, 2vw, 2.25rem);
  }
}

.nav__link {
  font-family: var(--font-body);
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--color-primary-800);
  text-decoration: none;
  padding: 0.5rem 0.25rem;
  position: relative;
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.nav__link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2.5px;
  background-color: var(--color-secondary);
  border-radius: var(--radius-full);
  transition: width var(--transition-fast);
}

.nav__link:hover {
  color: var(--color-primary-950);
}

.nav__link:hover::after {
  width: 100%;
}

.nav__link--active {
  color: var(--color-primary-950);
  font-weight: 600;
}

.nav__link--active::after {
  width: 100%;
  background-color: var(--color-secondary);
}

/* Zone 3: Actions (Phone Pill & Get a Quote Button) */
.header__actions {
  display: none;
}

@media (min-width: 768px) {
  .header__actions {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    flex-shrink: 0;
  }
}

.header__btn-phone {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.55rem 1.15rem;
  background: #ffffff;
  border: 1px solid rgba(203, 213, 225, 0.9);
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: var(--font-size-xs);
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
  transition: all var(--transition-fast);
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04);
}

.header__btn-phone:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary-accessible);
  transform: translateY(-1px);
}

.header__btn-phone svg {
  color: var(--color-secondary-accessible);
}

/* Header Catalog Download Button */
.header__btn-download {
  font-size: var(--font-size-xs);
  padding: 0.6rem 1rem;
}

.header__btn-quote {
  font-size: 0.9rem;
  font-weight: 700;
  padding: 0.65rem 1.4rem;
  min-height: 42px;
  border-radius: 10px;
}

/* Orange Pill CTA Button (Exact Mockup Match) */
.btn--orange-pill {
  background: #ea9a3e;
  background: linear-gradient(135deg, #f2994a 0%, #ea9a3e 100%);
  color: #ffffff !important;
  font-weight: 700;
  border-radius: var(--radius-full);
  border: none;
  box-shadow: 0 4px 16px rgba(234, 154, 62, 0.35);
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.6rem 1.35rem;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn--orange-pill:hover {
  background: linear-gradient(135deg, #f5a65b 0%, #d97706 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(234, 154, 62, 0.45);
  color: #ffffff !important;
}

.btn--orange-pill:active {
  transform: translateY(0);
}

/* Mobile Menu Toggle Button */
.header__toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  background: var(--color-surface-muted);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0;
  z-index: 1005;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

@media (min-width: 992px) {
  .header__toggle {
    display: none;
  }
}

.header__toggle:hover {
  background-color: var(--color-secondary-50);
  border-color: var(--color-secondary);
}

.header__toggle-bar {
  width: 22px;
  height: 2.5px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast), background-color var(--transition-fast);
}

.header__toggle-bar:not(:last-child) {
  margin-bottom: 5px;
}

/* Active Hamburger to X */
.header__toggle[aria-expanded="true"] {
  background-color: var(--color-primary);
  border-color: var(--color-secondary);
}

.header__toggle[aria-expanded="true"] .header__toggle-bar {
  background-color: var(--color-secondary);
}

.header__toggle[aria-expanded="true"] .header__toggle-bar:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.header__toggle[aria-expanded="true"] .header__toggle-bar:nth-child(2) {
  opacity: 0;
}

.header__toggle[aria-expanded="true"] .header__toggle-bar:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* Mobile Navigation Drawer */
.mobile-nav {
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  max-width: min(88vw, 380px);
  height: 100vh;
  height: 100dvh;
  background: var(--color-bg-white);
  box-shadow: -10px 0 35px rgba(42, 48, 60, 0.25);
  z-index: 1002;
  padding: 1.25rem 1.25rem 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  transition: right var(--transition-normal);
}

.mobile-nav--open {
  right: 0;
}

/* Dedicated Mobile Drawer Header with High-Contrast Close Button */
.mobile-nav__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 1rem;
  margin-bottom: 1.25rem;
  border-bottom: 1px solid var(--color-border-light);
}

.mobile-nav__close {
  display: inline-flex !important;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  min-width: 44px;
  min-height: 44px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-950);
  border: 1.5px solid var(--color-primary-800);
  color: #ffffff;
  cursor: pointer;
  padding: 0;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.mobile-nav__close svg {
  display: block;
  width: 22px;
  height: 22px;
  stroke: #ffffff;
  stroke-width: 2.5;
  transition: stroke var(--transition-fast), transform var(--transition-fast);
}

.mobile-nav__close:hover,
.mobile-nav__close:focus-visible {
  background: var(--color-secondary);
  border-color: var(--color-secondary);
  color: var(--color-primary-950);
  transform: scale(1.05);
}

.mobile-nav__close:hover svg,
.mobile-nav__close:focus-visible svg {
  stroke: var(--color-primary-950);
}

.mobile-nav__backdrop {
  position: fixed;
  inset: 0;
  background: rgba(18, 21, 27, 0.55);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 1001;
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--transition-normal), visibility var(--transition-normal);
}

.mobile-nav__backdrop--open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav__list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.mobile-nav__link {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-primary);
  display: block;
  padding: 0.45rem 0;
  border-bottom: 1px solid var(--color-border-light);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.mobile-nav__link:hover,
.mobile-nav__link--active {
  color: var(--color-secondary-accessible);
  padding-left: 0.5rem;
  border-bottom-color: var(--color-secondary);
}

.mobile-nav__actions {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border-light);
}

.mobile-nav__contact {
  margin-top: 1.5rem;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}
.mobile-nav__contact p {
  margin-bottom: 0.35rem;
}
.mobile-nav__contact a {
  color: var(--color-primary);
  font-weight: 600;
}

/* Adjust page padding for fixed header */
body {
  padding-top: 82px;
}

@media (max-width: 768px) {
  body {
    padding-top: 68px;
  }
}