:root {
  --ink: #0b1c2c;
  --ink-soft: #243b4a;
  --mist: #d9e4ec;
  --paper: #f3f6f8;
  --foam: #fbfcfd;
  --teal: #0f6b63;
  --teal-deep: #0a4f4a;
  --sand: #c4a574;
  --line: rgba(11, 28, 44, 0.12);
  --shadow: 0 24px 60px rgba(11, 28, 44, 0.12);
  --font-display: "Syne", sans-serif;
  --font-brand: "Fraunces", serif;
  --font-body: "IBM Plex Sans", sans-serif;
  --max: 1120px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.55;
  background: var(--paper);
  overflow-x: hidden;
}

a {
  color: var(--teal-deep);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--teal);
}

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(900px 500px at 12% -10%, rgba(15, 107, 99, 0.18), transparent 55%),
    radial-gradient(700px 480px at 90% 8%, rgba(196, 165, 116, 0.22), transparent 50%),
    linear-gradient(165deg, #e7eef3 0%, #f3f6f8 42%, #eef3f1 100%);
  animation: drift 18s ease-in-out infinite alternate;
}

@keyframes drift {
  from {
    filter: hue-rotate(0deg);
    transform: scale(1);
  }
  to {
    filter: hue-rotate(8deg);
    transform: scale(1.03);
  }
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 0.85rem 1.25rem;
  background: transparent;
  border-bottom: 1px solid transparent;
}

/* Blur on a pseudo so fixed drawer is not clipped to header height */
.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: rgba(243, 246, 248, 0.78);
  backdrop-filter: blur(10px);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
}

.brand {
  font-family: var(--font-brand);
  font-weight: 700;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
  color: var(--ink);
  text-decoration: none;
  z-index: 2;
  min-width: 0;
}

.nav-toggle {
  appearance: none;
  position: relative;
  z-index: 32;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  background: rgba(251, 252, 253, 0.9);
  color: var(--ink);
  cursor: pointer;
  flex-shrink: 0;
}

.nav-toggle:hover {
  background: rgba(11, 28, 44, 0.06);
}

.nav-toggle-bars,
.nav-toggle-bars::before,
.nav-toggle-bars::after {
  display: block;
  width: 1.05rem;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 0.22s ease, opacity 0.22s ease;
}

.nav-toggle-bars {
  position: relative;
}

.nav-toggle-bars::before,
.nav-toggle-bars::after {
  content: "";
  position: absolute;
  left: 0;
}

.nav-toggle-bars::before {
  top: -6px;
}

.nav-toggle-bars::after {
  top: 6px;
}

body.nav-open .nav-toggle-bars {
  background: transparent;
}

body.nav-open .nav-toggle-bars::before {
  top: 0;
  transform: rotate(45deg);
}

body.nav-open .nav-toggle-bars::after {
  top: 0;
  transform: rotate(-45deg);
}

.nav-backdrop {
  position: fixed;
  inset: 0;
  z-index: 28;
  background: rgba(11, 28, 44, 0.38);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.22s ease;
}

body.nav-open .nav-backdrop {
  opacity: 1;
  pointer-events: auto;
}

.site-menu {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 29;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  width: min(19.5rem, 86vw);
  height: 100vh;
  height: 100dvh;
  padding: 4.75rem 1.35rem 1.75rem;
  background: rgba(251, 252, 253, 0.98);
  border-right: 1px solid var(--line);
  box-shadow: var(--shadow);
  transform: translateX(-105%);
  transition: transform 0.24s ease;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
}

html[dir="rtl"] .site-menu {
  left: auto;
  right: 0;
  border-right: 0;
  border-left: 1px solid var(--line);
  transform: translateX(105%);
}

body.nav-open .site-menu {
  transform: translateX(0);
}

body.nav-open {
  overflow: hidden;
}

.nav {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin: 0;
}

.nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 1.05rem;
  font-weight: 500;
  padding: 0.55rem 0.35rem;
  border-radius: 0.4rem;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--ink);
  background: rgba(15, 107, 99, 0.08);
}

.header-actions {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  margin-top: auto;
}

.header-actions .btn-sm {
  margin: 0;
  width: 100%;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.35rem;
  border-radius: 999px;
  background: var(--ink);
  color: var(--foam);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid var(--ink);
  transition: transform 0.2s ease, background 0.2s ease;
}

.btn:hover {
  background: var(--teal-deep);
  border-color: var(--teal-deep);
  color: var(--foam);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
}

.btn-ghost:hover {
  background: rgba(11, 28, 44, 0.06);
  color: var(--ink);
}

.btn-sm {
  padding: 0.55rem 1rem;
  font-size: 0.88rem;
}

.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
  display: grid;
  gap: 2.5rem;
  align-items: center;
  min-height: calc(100vh - 4.5rem);
}

.brand-hero {
  margin: 0 0 0.75rem;
  font-family: var(--font-brand);
  font-weight: 700;
  font-size: clamp(3.2rem, 10vw, 6.5rem);
  line-height: 0.95;
  letter-spacing: -0.04em;
  color: var(--ink);
  animation: rise 0.9s ease both;
}

.brand-hero.sm {
  font-size: clamp(2.4rem, 6vw, 3.5rem);
}

.hero h1 {
  margin: 0 0 1rem;
  max-width: 16ch;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.55rem, 3.4vw, 2.35rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
  animation: rise 0.9s ease 0.08s both;
}

.lede {
  margin: 0 0 1rem;
  max-width: 40rem;
  color: var(--ink-soft);
  font-size: 1.08rem;
  animation: rise 0.9s ease 0.16s both;
}

.lede.soft {
  margin-bottom: 1.75rem;
  font-size: 1.02rem;
  opacity: 0.95;
  animation-delay: 0.2s;
}

.prose {
  margin: 0 0 1rem;
  max-width: 46rem;
  color: var(--ink-soft);
  font-size: 1.02rem;
}

.section-note {
  margin: 1.5rem 0 0;
  max-width: 46rem;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.lang-switch {
  display: inline-flex;
  flex-shrink: 0;
  border: 1px solid var(--line);
  border-radius: 999px;
  overflow: hidden;
  background: rgba(251, 252, 253, 0.8);
  z-index: 2;
}

.lang-switch-bar {
  margin-left: auto;
}

html[dir="rtl"] .lang-switch-bar {
  margin-left: 0;
  margin-right: auto;
}

.lang-switch-drawer {
  display: none;
  align-self: flex-start;
}

.lang-switch button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--ink-soft);
  font: inherit;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.45rem 0.65rem;
  cursor: pointer;
}

.lang-switch button.is-active {
  background: var(--ink);
  color: var(--foam);
}

html[dir="rtl"] body,
body.is-rtl {
  font-family: "IBM Plex Sans Arabic", var(--font-body);
}

html[dir="rtl"] .brand-hero,
html[dir="rtl"] .hero h1,
html[dir="rtl"] .section-head h2,
html[dir="rtl"] .band h2,
html[dir="rtl"] .cta-final h2 {
  letter-spacing: 0;
}

html[dir="rtl"] .actions div {
  border-left: 0;
  border-right: 3px solid var(--teal);
}

.os-row,
.file-icons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem 1.1rem;
  margin-top: 1.75rem;
}

.badge-icon {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.55rem 0.85rem;
  border-radius: 999px;
  background: rgba(251, 252, 253, 0.85);
  border: 1px solid var(--line);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink-soft);
}

.badge-icon svg {
  width: 1.25rem;
  height: 1.25rem;
  display: block;
}

.surface-top {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin-bottom: 0.55rem;
}

.logo-mark {
  width: 2.6rem;
  height: 2.6rem;
  flex: 0 0 auto;
  display: block;
}

.logo-mark svg {
  width: 100%;
  height: 100%;
  display: block;
  border-radius: 0.65rem;
}

.file-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  min-width: 4.5rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--ink-soft);
}

.file-badge svg {
  width: 3rem;
  height: auto;
  filter: drop-shadow(0 8px 16px rgba(11, 28, 44, 0.12));
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  animation: rise 0.9s ease 0.24s both;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-visual {
  display: grid;
  place-items: center;
  min-height: 280px;
}

.radar {
  position: relative;
  width: min(100%, 380px);
  aspect-ratio: 1;
  border-radius: 50%;
  background:
    radial-gradient(circle at 50% 50%, rgba(15, 107, 99, 0.16), transparent 55%),
    rgba(251, 252, 253, 0.55);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  animation: float 7s ease-in-out infinite;
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.ring {
  position: absolute;
  inset: 12%;
  border: 1px solid rgba(15, 107, 99, 0.28);
  border-radius: 50%;
}

.r2 {
  inset: 24%;
  border-color: rgba(15, 107, 99, 0.2);
}

.r3 {
  inset: 36%;
  border-color: rgba(15, 107, 99, 0.14);
}

.beam {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 48%;
  height: 2px;
  background: linear-gradient(90deg, var(--teal), transparent);
  transform-origin: left center;
  animation: sweep 4.5s linear infinite;
}

@keyframes sweep {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

.core {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: lowercase;
  color: var(--teal-deep);
  background: var(--foam);
  border: 1px solid var(--line);
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
}

.node {
  position: absolute;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: rgba(251, 252, 253, 0.9);
  border: 1px solid var(--line);
  padding: 0.35rem 0.55rem;
  border-radius: 999px;
}

.n1 {
  top: 14%;
  left: 58%;
}

.n2 {
  bottom: 18%;
  left: 12%;
}

.n3 {
  bottom: 22%;
  right: 10%;
}

.band {
  max-width: var(--max);
  margin: 0 auto 2rem;
  padding: 2.5rem 1.5rem;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.band h2,
.section-head h2,
.cta-final h2 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  letter-spacing: -0.03em;
}

.band-text {
  margin: 0;
  max-width: 48rem;
  font-size: 1.2rem;
  color: var(--ink-soft);
}

.band-text strong {
  color: var(--ink);
  font-weight: 600;
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: 3.5rem 1.5rem;
}

.section-head {
  margin-bottom: 2rem;
  max-width: 36rem;
}

.section-head p {
  margin: 0;
  color: var(--ink-soft);
}

.surface-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.surface-list li {
  display: grid;
  gap: 0.35rem;
  padding: 1.25rem 1.35rem;
  background: rgba(251, 252, 253, 0.78);
}

.surface-list .label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal);
}

.surface-list strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.25rem;
}

.surface-list > li > span:last-of-type {
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
}

.flow li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem 1.25rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--line);
}

.flow h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.2rem;
}

.flow p {
  margin: 0;
  color: var(--ink-soft);
}

.step {
  font-family: var(--font-brand);
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--teal);
  line-height: 1;
}

.actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.actions div {
  padding: 1.1rem 1.2rem;
  border-left: 3px solid var(--teal);
  background: rgba(251, 252, 253, 0.65);
}

.actions strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin-bottom: 0.2rem;
}

.actions span {
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.muted {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.scan-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.5rem;
}

.scan-grid h3 {
  margin: 0 0 0.4rem;
  font-family: var(--font-display);
}

.scan-grid p {
  margin: 0;
  color: var(--ink-soft);
}

.accent {
  background: linear-gradient(135deg, rgba(15, 107, 99, 0.1), rgba(196, 165, 116, 0.12));
  border-block: 1px solid var(--line);
  max-width: none;
  padding-inline: max(1.5rem, calc((100% - var(--max)) / 2 + 1.5rem));
}

.principles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem;
}

.principles li {
  max-width: 40rem;
  color: var(--ink-soft);
}

.principles strong {
  display: block;
  color: var(--ink);
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin-bottom: 0.25rem;
}

.video-embed {
  position: relative;
  width: 100%;
  max-width: 880px;
  margin: 0 auto;
  aspect-ratio: 16 / 9;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  background: #0b1c2c;
}

.video-embed iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.arch-page {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
}

.arch-head {
  max-width: 42rem;
  margin-bottom: 2rem;
}

.arch-head h1 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.75rem);
  letter-spacing: -0.03em;
  margin: 0 0 0.75rem;
}

.arch-head p {
  color: var(--ink-soft);
  margin: 0;
}

.arch-figure {
  margin: 0;
}

.arch-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: var(--shadow);
  background: #fff;
}

.arch-figure figcaption {
  margin-top: 0.85rem;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.arch-back {
  margin: 2rem 0 0;
}

.arch-back a {
  font-weight: 600;
  text-decoration: none;
}

.cta-final {
  text-align: center;
  padding-bottom: 5rem;
}

.cta-final p {
  margin: 0 auto 1.5rem;
  max-width: 34rem;
  color: var(--ink-soft);
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.25rem 1.5rem 2rem;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.site-footer a {
  text-decoration: none;
  font-weight: 500;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (min-width: 900px) {
  .site-header {
    gap: 1.25rem;
    padding: 1rem 1.5rem;
  }

  .nav-toggle,
  .nav-backdrop,
  .lang-switch-bar {
    display: none !important;
  }

  .lang-switch-drawer {
    display: inline-flex;
    align-self: center;
  }

  .site-menu {
    position: static;
    inset: auto;
    width: auto;
    height: auto;
    flex: 1;
    flex-direction: row;
    align-items: center;
    gap: 1rem;
    padding: 0;
    background: transparent;
    border: 0;
    box-shadow: none;
    transform: none;
    overflow: visible;
  }

  html[dir="rtl"] .site-menu {
    transform: none;
    border: 0;
  }

  body.nav-open {
    overflow: auto;
  }

  .nav {
    flex-direction: row;
    align-items: center;
    gap: 1.25rem;
    margin-left: auto;
    margin-right: 0.25rem;
  }

  html[dir="rtl"] .nav {
    margin-left: 0.25rem;
    margin-right: auto;
  }

  .nav a {
    font-size: 0.95rem;
    padding: 0;
    border-radius: 0;
  }

  .nav a:hover,
  .nav a[aria-current="page"] {
    background: transparent;
  }

  .header-actions {
    flex-direction: row;
    align-items: center;
    gap: 0.35rem;
    margin-top: 0;
    width: auto;
  }

  .header-actions .btn-sm {
    width: auto;
    margin-left: 0.35rem;
  }

  html[dir="rtl"] .header-actions .btn-sm {
    margin-left: 0;
    margin-right: 0.35rem;
  }

}

@media (min-width: 720px) {
  .hero {
    grid-template-columns: 1.15fr 0.85fr;
    padding-top: 3rem;
  }

  .surface-list {
    grid-template-columns: 1fr 1fr;
  }

  .actions {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .scan-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .file-icons {
    margin-bottom: 1.75rem;
  }
}

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

  .atmosphere,
  .radar,
  .beam,
  .brand-hero,
  .hero h1,
  .lede,
  .cta-row,
  .reveal {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    transform: none !important;
    filter: none !important;
  }
}