/* ==========================================================================
   Palmyra: Layout: container, section shell, header, footer
   ========================================================================== */

.container {
  width: min(100% - 2 * var(--container-gutter), var(--container-max));
  margin-inline: auto;
}

.section {
  padding-block: var(--space-section);
  position: relative;
  overflow-x: clip; /* slide-in reveals never create sideways scroll */
}

.section--alt {
  background: var(--color-surface-alt);
}

.section__header {
  max-width: 44rem;
  margin-block-end: var(--space-8);
}

.section__header--center {
  margin-inline: auto;
  text-align: center;
}

.section__title {
  font-size: var(--text-3xl);
  margin-block: var(--space-3) var(--space-4);
}

.section__lead {
  font-size: var(--text-lg);
  color: var(--color-ink-soft);
}

/* ---------- Scroll progress ---------- */

.scroll-progress {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  height: 3px;
  z-index: var(--z-progress);
  background: linear-gradient(90deg, var(--color-primary), var(--color-sky));
  transform: scaleX(var(--scroll-progress, 0));
  transform-origin: left center;
  pointer-events: none;
}

[dir="rtl"] .scroll-progress {
  transform-origin: right center;
}

/* ---------- Header ---------- */

.site-header {
  position: fixed;
  inset-block-start: 0;
  inset-inline: 0;
  z-index: var(--z-header);
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition:
    background-color var(--duration-base) var(--ease-out),
    box-shadow var(--duration-base) var(--ease-out),
    height var(--duration-base) var(--ease-out);
}

.site-header--scrolled {
  height: 4rem;
  background: rgb(251 248 242 / 0.88);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  backdrop-filter: blur(14px) saturate(1.4);
  box-shadow: 0 1px 0 var(--color-border), var(--shadow-sm);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.brand {
  flex: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  min-height: 44px;
  transition: opacity var(--duration-fast) var(--ease-out);
}

.brand:hover {
  opacity: 0.82;
}

.brand__logo {
  width: auto;
  height: 3.25rem;
  transition: height var(--duration-base) var(--ease-out);
}

.site-header--scrolled .brand__logo {
  height: 2.75rem;
}

.brand__logo--full {
  height: 7rem;
}

/* ---------- Primary navigation ---------- */

.site-nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding-inline: var(--space-4);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ink-soft);
  transition: color var(--duration-fast) var(--ease-out);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  inset-inline: var(--space-4);
  inset-block-end: 0.5rem;
  height: 2px;
  border-radius: 2px;
  background: var(--color-sky);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform var(--duration-base) var(--ease-out);
}

[dir="rtl"] .site-nav__link::after {
  transform-origin: right center;
}

.site-nav__link:hover,
.site-nav__link--active {
  color: var(--color-ink);
}

.site-nav__link:hover::after,
.site-nav__link--active::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-pill);
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  background: var(--color-surface);
}

.nav-toggle__bars,
.nav-toggle__bars::before,
.nav-toggle__bars::after {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-ink);
  transition: transform var(--duration-base) var(--ease-out), opacity var(--duration-fast);
}

.nav-toggle__bars {
  position: relative;
}

.nav-toggle__bars::before,
.nav-toggle__bars::after {
  content: "";
  position: absolute;
  inset-inline-start: 0;
}

.nav-toggle__bars::before {
  inset-block-start: -6px;
}

.nav-toggle__bars::after {
  inset-block-start: 6px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
  transform: translateY(-6px) rotate(-45deg);
}

@media (max-width: 60rem) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: fixed;
    inset-block-start: var(--header-height);
    inset-inline: var(--container-gutter);
    padding: var(--space-4);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-0.75rem);
    transition:
      opacity var(--duration-base) var(--ease-out),
      transform var(--duration-base) var(--ease-out),
      visibility 0s linear var(--duration-base);
  }

  .site-nav--open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition-delay: 0s;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .site-nav__link {
    min-height: 52px;
    font-size: var(--text-base);
  }

  .site-nav__link::after {
    display: none;
  }

  .site-header .site-header__cta {
    display: none;
  }
}

/* ---------- Footer ---------- */

.site-footer {
  background: var(--color-ink);
  color: rgb(255 255 255 / 0.78);
  padding-block: var(--space-8) var(--space-6);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.2fr;
  gap: var(--space-7);
  padding-block-end: var(--space-7);
  border-block-end: 1px solid rgb(255 255 255 / 0.14);
}

.site-footer .brand {
  color: #ffffff;
}

.site-footer__about {
  margin-block-start: var(--space-4);
  max-width: 26rem;
  font-size: var(--text-sm);
}

.site-footer__heading {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgb(255 255 255 / 0.6);
  margin-block-end: var(--space-4);
}

html[lang="ar"] .site-footer__heading {
  letter-spacing: 0;
  font-size: var(--text-sm);
}

.site-footer__list {
  display: grid;
  gap: var(--space-1);
}

.site-footer__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  min-height: 40px;
  color: rgb(255 255 255 / 0.86);
  transition: color var(--duration-fast) var(--ease-out);
}

.site-footer__link:hover {
  color: var(--color-sky);
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-3);
  padding-block-start: var(--space-5);
  font-size: var(--text-xs);
  color: rgb(255 255 255 / 0.62);
}

@media (max-width: 48rem) {
  .site-footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}