* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  overflow-x: clip;
  max-width: 100%;
}

.skip-to-main {
  position: absolute;
  inset-inline-start: 1rem;
  top: -6rem;
  z-index: 100;
  padding: 0.75rem 1.25rem;
  border-radius: 999px;
  background: var(--blue);
  color: #fff;
  font-weight: 700;
  text-decoration: none;
}

.skip-to-main:focus {
  top: 1rem;
  outline: 2px solid #fff;
  outline-offset: 3px;
}

:focus:not(:focus-visible) {
  outline: none;
}

:focus-visible {
  outline: 2px solid var(--blue-light);
  outline-offset: 2px;
}

body {
  margin: 0;
  min-height: 100vh;
  max-width: 100%;
  overflow-x: hidden;
  overflow-x: clip;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}

body.rtl {
  direction: rtl;
}

a {
  color: var(--blue-light);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

.page-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  overflow: hidden;
}

.page-bg__image {
  position: absolute;
  inset: -8%;
  background: url('/images/photos/concrete-foundation.jpg') center / cover no-repeat;
  filter: blur(8px) saturate(0.85);
  opacity: 0.28;
  will-change: transform;
}

.page-bg__overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 0%, rgb(37 99 235 / 0.08), transparent 55%),
    linear-gradient(180deg, rgb(1 4 9 / 0.4) 0%, rgb(1 4 9 / 0.92) 45%, var(--bg) 100%);
}

.grid-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.06;
  background-image: radial-gradient(rgb(148 163 184 / 0.35) 1px, transparent 1px);
  background-size: 32px 32px;
  mask-image: linear-gradient(180deg, black 0%, transparent 70%);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
  transition: background 0.35s ease, border-color 0.35s ease, backdrop-filter 0.35s ease;
}

.site-header:not(.is-scrolled) {
  backdrop-filter: none;
  background: transparent;
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  backdrop-filter: blur(18px) saturate(1.2);
  background: rgb(1 4 9 / 0.88);
  border-bottom: 1px solid var(--border-subtle);
}

header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px) saturate(1.2);
  background: rgb(1 4 9 / 0.82);
  border-bottom: 1px solid var(--border-subtle);
}

body[data-layout='home'] header.site-header {
  position: fixed;
  width: 100%;
}

body[data-layout='home'] main {
  padding-top: var(--header-h);
}

.nav {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0.85rem 1.5rem;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
  flex-shrink: 0;
}

.brand:hover {
  text-decoration: none;
}

.brand-icon {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.6rem;
  overflow: hidden;
  display: block;
  flex-shrink: 0;
}

.brand-icon img {
  width: 100%;
  height: 100%;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex: 1;
  justify-content: center;
}

.nav-link {
  padding: 0.5rem 0.85rem;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s, background 0.2s;
}

.nav-link:hover {
  color: var(--text);
  background: rgb(255 255 255 / 0.05);
  text-decoration: none;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.nav-cta {
  padding: 5px;
  font-size: 0.72rem;
}

.nav-mobile {
  display: none;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 1.5rem 0.75rem;
  gap: 0.35rem;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.nav-mobile::-webkit-scrollbar {
  display: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  width: max-content;
  max-width: 100%;
  flex: 0 0 auto;
  padding: 5px;
  box-sizing: border-box;
  border-radius: 999px;
  font-weight: 700;
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.2s, background 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: rgb(148 163 184 / 0.4);
}

.btn-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 12px 32px rgb(37 99 235 / 0.35);
}

.btn-primary:hover {
  background: #1d4ed8;
  box-shadow: 0 16px 40px rgb(37 99 235 / 0.45);
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0;
  background: none;
  border: none;
  color: var(--blue-light);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
  text-decoration: none;
}

.btn-link::after {
  content: '→';
  transition: transform 0.2s;
}

body.rtl .btn-link::after {
  content: '←';
}

.btn-link:hover {
  text-decoration: none;
  color: var(--text);
}

.btn-link:hover::after {
  transform: translateX(4px);
}

body.rtl .btn-link:hover::after {
  transform: translateX(-4px);
}

main {
  position: relative;
  z-index: 1;
  max-width: 100%;
  min-width: 0;
  overflow-x: clip;
}

main img {
  max-width: 100%;
}

.section-label {
  display: block;
  margin: 0 0 1rem;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: var(--label-tracking);
  text-transform: uppercase;
  color: var(--blue-light);
}

.section {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: var(--section-pad) 1.5rem;
}

.section--full {
  max-width: none;
  padding-inline: 0;
}

.section--alt {
  background: linear-gradient(
    180deg,
    rgb(12 21 36 / 0.55) 0%,
    rgb(12 21 36 / 0.2) 50%,
    transparent 100%
  );
  border-block: 1px solid var(--border-subtle);
}

.section__header {
  text-align: center;
  margin-bottom: clamp(2rem, 5vw, 3.5rem);
  max-width: 42rem;
  margin-inline: auto;
}

.section-title {
  margin: 0 0 1rem;
  font-size: var(--display-lg);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.08;
  color: var(--text);
}

.section-title em,
.section-title .accent-italic {
  font-style: italic;
  font-weight: 700;
  color: var(--accent-italic);
}

.section-lead {
  text-align: center;
  max-width: 36rem;
  margin: 0 auto;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.125rem);
  line-height: 1.65;
}

.reveal {
  opacity: 0;
  transform: translateY(2rem);
  transition: opacity 0.8s cubic-bezier(0.22, 1, 0.36, 1), transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.reveal-delay-1 { transition-delay: 0.12s; }
.reveal-delay-2 { transition-delay: 0.24s; }
.reveal-delay-3 { transition-delay: 0.36s; }

.media-scale {
  overflow: hidden;
}

.media-scale img {
  transition: transform 1.2s cubic-bezier(0.22, 1, 0.36, 1);
}

.media-scale.is-visible img,
.reveal.is-visible .media-scale img {
  transform: scale(1);
}

.media-scale img {
  transform: scale(1.04);
}

.chapter {
  position: relative;
}

.chapter--dark {
  background: var(--bg);
}

.chapter--elevated {
  background: linear-gradient(180deg, var(--bg-elevated) 0%, var(--bg) 100%);
}

.chapter--mid {
  background: var(--bg-mid);
}

.chapter--panel {
  background: linear-gradient(180deg, var(--surface-panel) 0%, var(--bg-elevated) 100%);
  border-block: 1px solid var(--border-subtle);
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}