/* =============================================================================
   IMTREX INC. — Layout
   Nav, Footer, Container, Grid, Section patterns
   ============================================================================= */

/* =============================================================================
   A11Y — Touch target minimums
   FINDING-005: WCAG 2.5.5 — primary interactive elements should be ≥ 44px.
   Nav and mega-menu links computed as 26-34px tall in earlier audit.
   This rule enforces the floor without forcing larger visual heights —
   a small link with extra padding still passes.
   ============================================================================= */

.nav__link,
.mega-menu__link,
.footer__link,
.mobile-nav__link,
.mobile-nav__sub-link,
.nav__contact-link,
.nav__cta-link {
  min-block-size: 44px;
  display: inline-flex;
  align-items: center;
}

/* =============================================================================
   CONTAINER
   ============================================================================= */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.container--narrow {
  max-width: 760px;
}

.container--wide {
  max-width: 1400px;
}

/* =============================================================================
   SECTION BASE
   ============================================================================= */

.section {
  padding-block: var(--section-pad-y);
}

.section--sm {
  padding-block: var(--section-pad-y-sm);
}

.section--cream { background-color: var(--background-cream); }
.section--paper { background-color: var(--background-paper); }
.section--white { background-color: var(--background-white); }
.section--olive { background-color: var(--brand-olive); }
.section--terracotta { background-color: var(--brand-terracotta); }

.section__header {
  margin-block-end: clamp(2.5rem, 5vw, 4rem);
}

.section__header--centered {
  text-align: center;
}

.section__header--centered p {
  margin-inline: auto;
}

.section__eyebrow {
  display: block;
  margin-block-end: var(--space-3);
}

.section__title {
  margin-block-end: var(--space-4);
}

.section__subtitle {
  font-size: var(--type-lg);
  line-height: var(--leading-relaxed);
  color: var(--text-secondary);
  max-width: 56ch;
}

/* =============================================================================
   NAVIGATION
   ============================================================================= */

.nav-wrapper {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: var(--z-sticky);
  transition: background-color var(--duration-med) var(--ease-out),
              box-shadow var(--duration-med) var(--ease-out),
              backdrop-filter var(--duration-med) var(--ease-out);
}

.nav-wrapper--transparent {
  background-color: transparent;
}

.nav-wrapper--scrolled {
  background-color: rgba(248, 243, 237, 0.97);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--divider), var(--shadow-sm);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: var(--space-6);
}

.nav__logo {
  display: flex;
  align-items: center;
  text-decoration: none;
  flex-shrink: 0;
}

.nav__logo-img {
  height: 36px;
  width: auto;
}

.nav__logo-text {
  font-family: var(--font-serif);
  font-size: 1.375rem;
  font-weight: var(--weight-black);
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1;
}

.nav__logo-text span {
  color: var(--brand-terracotta);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  list-style: none;
}

.nav__link {
  font-size: var(--type-sm);
  font-weight: var(--weight-medium);
  color: var(--text-primary);
  text-decoration: none;
  padding-block: var(--space-1);
  position: relative;
  white-space: nowrap;
  transition: color var(--duration-fast) var(--ease-out);
}

.nav__link::after {
  content: '';
  position: absolute;
  inset-inline: 0;
  inset-block-end: -2px;
  height: 1.5px;
  background-color: var(--brand-gold);
  transform: scaleX(0);
  transform-origin: start;
  transition: transform var(--duration-fast) var(--ease-out);
}

.nav__link:hover { color: var(--brand-terracotta); }
.nav__link:hover::after { transform: scaleX(1); }
.nav__link.active { color: var(--brand-terracotta); }
.nav__link.active::after { transform: scaleX(1); }

/* Mega Menu */
.nav__item { position: relative; }

.nav__item:hover .mega-menu,
.nav__item:focus-within .mega-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.mega-menu {
  position: absolute;
  inset-block-start: calc(100% + 12px);
  inset-inline-start: 50%;
  transform: translateX(-50%) translateY(-8px);
  background-color: var(--background-white);
  border: 1px solid var(--divider);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-fast) var(--ease-out),
              transform var(--duration-fast) var(--ease-out);
  min-width: 480px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  z-index: var(--z-dropdown);
}

.mega-menu__col-title {
  font-size: var(--type-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--text-muted);
  margin-block-end: var(--space-3);
  padding-block-end: var(--space-2);
  border-block-end: 1px solid var(--divider);
}

.mega-menu__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.mega-menu__link {
  font-size: var(--type-sm);
  color: var(--text-primary);
  text-decoration: none;
  padding-block: var(--space-1);
  padding-inline: var(--space-2);
  border-radius: var(--radius-sm);
  display: block;
  transition: background-color var(--duration-fast),
              color var(--duration-fast);
}

.mega-menu__link:hover {
  background-color: var(--brand-terracotta-light);
  color: var(--brand-terracotta);
}

.mega-menu__footer {
  grid-column: 1 / -1;
  border-block-start: 1px solid var(--divider);
  padding-block-start: var(--space-3);
}

.mega-menu__cta-link {
  font-size: var(--type-sm);
  font-weight: var(--weight-semibold);
  color: var(--brand-terracotta);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}

.mega-menu__cta-link svg {
  transition: transform var(--duration-fast) var(--ease-out);
}

.mega-menu__cta-link:hover svg {
  transform: translateX(3px);
}

/* Nav actions */
.nav__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-shrink: 0;
}

.nav__contact-link {
  font-size: var(--type-sm);
  font-weight: var(--weight-medium);
  color: var(--text-secondary);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.nav__contact-link:hover { color: var(--brand-terracotta); }

/* Hamburger */
.nav__hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-1);
  border-radius: var(--radius-sm);
  transition: background-color var(--duration-fast);
}

.nav__hamburger:hover { background-color: var(--brand-terracotta-light); }

.nav__hamburger-line {
  display: block;
  height: 2px;
  width: 22px;
  background-color: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--duration-fast) var(--ease-out),
              opacity var(--duration-fast) var(--ease-out),
              width var(--duration-fast) var(--ease-out);
  transform-origin: center;
}

.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.nav__hamburger[aria-expanded="true"] .nav__hamburger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile menu overlay */
.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  background-color: var(--background-cream);
  z-index: calc(var(--z-sticky) - 1);
  padding: calc(68px + var(--space-6)) var(--container-pad) var(--space-9);
  overflow-y: auto;
  transform: translateX(100%);
  visibility: hidden;
  transition: transform var(--duration-med) var(--ease-out),
              visibility 0s var(--duration-med);
}

.mobile-menu-overlay.open {
  transform: translateX(0);
  visibility: visible;
  transition: transform var(--duration-med) var(--ease-out),
              visibility 0s;
}

/* inert attribute fallback for old browsers */
.mobile-menu-overlay[inert] {
  visibility: hidden;
  pointer-events: none;
}

.mobile-nav__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
  margin-block-end: var(--space-7);
}

.mobile-nav__link {
  display: block;
  font-size: var(--type-xl);
  font-family: var(--font-serif);
  font-weight: var(--weight-bold);
  color: var(--text-primary);
  text-decoration: none;
  padding-block: var(--space-3);
  border-block-end: 1px solid var(--divider);
  transition: color var(--duration-fast);
}

.mobile-nav__link:hover { color: var(--brand-terracotta); }

.mobile-nav__sub {
  list-style: none;
  padding-inline-start: var(--space-5);
  padding-block: var(--space-3);
  display: none;
}

.mobile-nav__sub.open { display: flex; flex-direction: column; gap: var(--space-2); }

.mobile-nav__sub-link {
  font-family: var(--font-sans);
  font-size: var(--type-base);
  color: var(--text-secondary);
  text-decoration: none;
  padding-block: var(--space-1);
  display: block;
}

.mobile-nav__sub-link:hover { color: var(--brand-terracotta); }

.mobile-nav__accordion-btn {
  background: none;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  font-size: var(--type-xl);
  font-family: var(--font-serif);
  font-weight: var(--weight-bold);
  color: var(--text-primary);
  padding-block: var(--space-3);
  border-block-end: 1px solid var(--divider);
  text-align: start;
}

.mobile-nav__accordion-btn svg {
  transition: transform var(--duration-fast) var(--ease-out);
  flex-shrink: 0;
}

.mobile-nav__accordion-btn[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

.mobile-nav__cta {
  margin-block-start: var(--space-6);
}

/* =============================================================================
   FOOTER
   ============================================================================= */

.site-footer {
  background-color: var(--brand-olive);
  color: var(--text-on-dark);
  padding-block-start: clamp(3.5rem, 7vw, 6rem);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr 1.2fr;
  gap: var(--space-8);
  padding-block-end: clamp(2.5rem, 5vw, 4rem);
  border-block-end: 1px solid rgba(248, 243, 237, 0.15);
}

.footer__col-title {
  font-size: var(--type-xs);
  font-weight: var(--weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--brand-gold);
  margin-block-end: var(--space-5);
}

.footer__brand-logo {
  margin-block-end: var(--space-4);
}

.footer__brand-logo-img {
  height: 32px;
  width: auto;
  filter: brightness(0) invert(1) opacity(0.9);
}

.footer__tagline {
  font-size: var(--type-sm);
  color: rgba(248, 243, 237, 0.7);
  line-height: var(--leading-relaxed);
  margin-block-end: var(--space-5);
  max-width: 26ch;
}

.footer__contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__contact-item {
  font-size: var(--type-sm);
  color: rgba(248, 243, 237, 0.8);
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  line-height: var(--leading-normal);
}

.footer__contact-item svg {
  flex-shrink: 0;
  margin-block-start: 2px;
  opacity: 0.6;
}

.footer__contact-link {
  color: rgba(248, 243, 237, 0.8);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.footer__contact-link:hover {
  color: var(--brand-gold);
}

.footer__fda-note {
  font-size: var(--type-xs);
  color: rgba(248, 243, 237, 0.45);
  margin-block-start: var(--space-4);
  font-family: var(--font-mono);
}

.footer__links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.footer__link {
  font-size: var(--type-sm);
  color: rgba(248, 243, 237, 0.75);
  text-decoration: none;
  transition: color var(--duration-fast);
  display: block;
  padding-block: 2px;
}

.footer__link:hover {
  color: var(--brand-gold);
}

.footer__social {
  display: flex;
  gap: var(--space-3);
  margin-block-start: var(--space-4);
}

.footer__social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background-color: rgba(248, 243, 237, 0.08);
  color: rgba(248, 243, 237, 0.7);
  text-decoration: none;
  transition: background-color var(--duration-fast),
              color var(--duration-fast);
}

.footer__social-link:hover {
  background-color: var(--brand-terracotta);
  color: var(--text-on-terracotta);
}

/* =============================================================================
   FOOTER NEWSLETTER — role-segmented subscription
   Sits above .footer__bottom. Responsive 1-col mobile, 2-col ≥900px.
   Animated success/error overlay on submit — no page reload.
   ============================================================================= */

.footer__newsletter {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  padding-block: var(--space-7);
  border-block-start: 1px solid rgba(248, 243, 237, 0.1);
  border-block-end: 1px solid rgba(248, 243, 237, 0.1);
  margin-block-end: var(--space-5);
}
@media (min-width: 900px) {
  .footer__newsletter {
    grid-template-columns: 1fr 1.1fr;
    gap: var(--space-8);
    align-items: center;
  }
}

.footer__newsletter-title {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 0.9rem + 1.1vw, 1.625rem);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text-on-dark);
  margin-block-end: var(--space-3);
}

.footer__newsletter-desc {
  font-size: var(--type-sm);
  color: rgba(248, 243, 237, 0.65);
  line-height: 1.6;
  max-width: 44ch;
}

.footer__newsletter-form {
  position: relative;
}

.footer__newsletter-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}
@media (min-width: 560px) {
  .footer__newsletter-row {
    grid-template-columns: 1.3fr 1fr auto;
  }
}

.footer__newsletter-input,
.footer__newsletter-select {
  background: rgba(248, 243, 237, 0.06);
  border: 1px solid rgba(248, 243, 237, 0.15);
  color: var(--text-on-dark);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: var(--type-sm);
  font-family: inherit;
  min-block-size: 44px;
  transition: border-color var(--duration-fast), background-color var(--duration-fast);
}

.footer__newsletter-input::placeholder {
  color: rgba(248, 243, 237, 0.4);
}

.footer__newsletter-input:focus,
.footer__newsletter-select:focus {
  outline: none;
  border-color: var(--brand-gold);
  background: rgba(248, 243, 237, 0.1);
}

.footer__newsletter-select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1.5L6 6.5L11 1.5' stroke='%23D4A853' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-inline-end: 2.25rem;
}

.footer__newsletter-btn {
  background: var(--brand-terracotta);
  color: var(--text-on-terracotta);
  border: 1px solid var(--brand-terracotta);
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-md);
  font-size: var(--type-sm);
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background-color var(--duration-fast), transform var(--duration-fast);
  white-space: nowrap;
  min-block-size: 44px;
}

.footer__newsletter-btn:hover:not(:disabled) {
  background: var(--brand-terracotta-dark);
  transform: translateY(-1px);
}

.footer__newsletter-btn:disabled {
  opacity: 0.65;
  cursor: wait;
}

.footer__newsletter-status {
  opacity: 0;
  pointer-events: none;
  font-size: var(--type-sm);
  font-weight: 600;
  margin-block-start: var(--space-3);
  padding: 0.5rem 0;
  transition: opacity var(--duration-med) var(--ease-out);
}

.footer__newsletter-status.visible {
  opacity: 1;
}

.footer__newsletter-status--success {
  color: #7ED4A0;
}

.footer__newsletter-status--error {
  color: #E8998A;
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-4);
  padding-block: var(--space-5);
}

.footer__copyright {
  font-size: var(--type-xs);
  color: rgba(248, 243, 237, 0.5);
}

.footer__bottom-links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
  flex-wrap: wrap;
}

.footer__bottom-link {
  font-size: var(--type-xs);
  color: rgba(248, 243, 237, 0.5);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.footer__bottom-link:hover { color: var(--brand-gold); }

.footer__consumer-note {
  font-size: var(--type-xs);
  color: rgba(248, 243, 237, 0.4);
}

.footer__consumer-note a {
  color: rgba(248, 243, 237, 0.5);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.footer__consumer-note a:hover { color: var(--brand-gold); }

/* =============================================================================
   RESPONSIVE — LAYOUT
   ============================================================================= */

@media (max-width: 1024px) {
  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-7);
  }

  .footer__grid > :first-child {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }
}

@media (max-width: 768px) {
  .nav__links,
  .nav__actions {
    display: none;
  }

  .nav__hamburger {
    display: flex;
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .footer__grid > :first-child {
    grid-column: auto;
    display: block;
  }

  .footer__bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-3);
  }
}