:root {
  --ink: #102018;
  --ink-soft: #2a3d32;
  --fog: #e8efe9;
  --paper: #f4f7f4;
  --mist: #d5e0d7;
  --signal: #1f8f6a;
  --signal-deep: #0f5c44;
  --amber: #c9842a;
  --line: rgba(16, 32, 24, 0.12);
  --shadow: 0 24px 60px rgba(16, 32, 24, 0.12);
  --font-display: "Syne", sans-serif;
  --font-body: "Manrope", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;
  --font-arabic: "IBM Plex Sans Arabic", "Manrope", sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.65;
  background:
    radial-gradient(1200px 700px at 85% -10%, rgba(31, 143, 106, 0.18), transparent 55%),
    radial-gradient(900px 600px at -10% 20%, rgba(201, 132, 42, 0.12), transparent 50%),
    linear-gradient(165deg, #eef4ef 0%, var(--paper) 42%, #e3ebe5 100%);
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(16, 32, 24, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(16, 32, 24, 0.04) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 80%);
  z-index: 0;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
svg {
  display: block;
  max-width: 100%;
}

.wrap {
  width: min(1120px, calc(100% - 2.5rem));
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(244, 247, 244, 0.78);
  border-bottom: 1px solid var(--line);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
  line-height: 1.1;
}

.brand-mark {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.45rem;
  letter-spacing: -0.04em;
}

.brand-mark span {
  color: var(--signal-deep);
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.35rem;
  list-style: none;
  font-size: 0.95rem;
}

.nav-links a {
  position: relative;
  color: var(--ink-soft);
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--ink);
}

.nav-links a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.35rem;
  height: 2px;
  background: var(--signal);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.85rem 1.25rem;
  border-radius: 0.55rem;
  border: 1px solid transparent;
  font-family: var(--font-body);
  font-weight: 650;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
}

.btn-primary:hover {
  background: var(--signal-deep);
}

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

.btn-ghost:hover {
  border-color: var(--ink-soft);
}

.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.5rem;
  align-items: end;
  padding: 4.5rem 0 3.5rem;
  min-height: calc(100vh - 5rem);
}

.hero-copy {
  max-width: 36rem;
  animation: rise 700ms ease both;
}

.hero-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(3.4rem, 8vw, 5.6rem);
  letter-spacing: -0.06em;
  line-height: 0.92;
  margin-bottom: 1.4rem;
}

.hero-brand em {
  font-style: normal;
  color: var(--signal-deep);
}

.hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.55rem, 3vw, 2.05rem);
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 0.9rem;
}

.hero p {
  color: var(--ink-soft);
  max-width: 32rem;
  margin-bottom: 1.75rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.hero-visual {
  position: relative;
  animation: rise 900ms ease both;
  animation-delay: 120ms;
}

.mesh-panel {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, 0.72), rgba(232, 239, 233, 0.55));
  box-shadow: var(--shadow);
  overflow: hidden;
  min-height: 420px;
  padding: 1.5rem;
}

.mesh-panel::after {
  content: "";
  position: absolute;
  inset: auto -20% -35% 20%;
  height: 70%;
  background: radial-gradient(circle, rgba(31, 143, 106, 0.28), transparent 65%);
  filter: blur(8px);
  animation: pulse 5.5s ease-in-out infinite;
}

.mesh-svg {
  position: relative;
  z-index: 1;
  width: 100%;
  height: auto;
}

.mesh-label {
  position: absolute;
  z-index: 2;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  background: rgba(244, 247, 244, 0.88);
  border: 1px solid var(--line);
  border-radius: 0.4rem;
  padding: 0.35rem 0.55rem;
}

.mesh-label.origin {
  top: 1.4rem;
  left: 1.4rem;
}

.mesh-label.edge {
  bottom: 1.4rem;
  right: 1.4rem;
}

.node-pulse {
  transform-origin: center;
  animation: nodePulse 2.8s ease-in-out infinite;
}

.flow-line {
  stroke-dasharray: 6 10;
  animation: dash 18s linear infinite;
}

.section {
  padding: 4rem 0;
}

.section-head {
  max-width: 40rem;
  margin-bottom: 2rem;
}

.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  letter-spacing: -0.04em;
  margin-bottom: 0.6rem;
}

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

.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.55);
  padding: 1.4rem 1.5rem;
}

.panel h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.45rem;
}

.panel p,
.panel li {
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.panel ul {
  margin-top: 0.75rem;
  padding-left: 1.1rem;
}

.panel li + li {
  margin-top: 0.35rem;
}

.code-block {
  margin-top: 1rem;
  border-radius: 0.75rem;
  background: var(--ink);
  color: #d7e7dc;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.55;
  padding: 1rem 1.1rem;
  overflow-x: auto;
}

.code-block .c {
  color: #8fb9a4;
}

.code-block .k {
  color: #f0c27a;
}

.endpoint-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

.endpoint-table th,
.endpoint-table td {
  text-align: left;
  padding: 0.85rem 0.6rem;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.endpoint-table th {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.method {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--signal-deep);
  background: rgba(31, 143, 106, 0.12);
  border-radius: 0.3rem;
  padding: 0.2rem 0.45rem;
}

.path {
  font-family: var(--font-mono);
  font-size: 0.86rem;
}

.page-hero {
  padding: 3.5rem 0 1.5rem;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  letter-spacing: -0.05em;
  margin-bottom: 0.75rem;
}

.page-hero p {
  max-width: 38rem;
  color: var(--ink-soft);
}

.prose {
  max-width: 46rem;
}

.prose p + p,
.prose ul {
  margin-top: 1rem;
}

.prose ul {
  padding-left: 1.2rem;
  color: var(--ink-soft);
}

.prose h2 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  letter-spacing: -0.03em;
  margin: 2rem 0 0.7rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.25rem;
}

.form {
  display: grid;
  gap: 0.9rem;
}

.form label {
  display: grid;
  gap: 0.35rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.form input,
.form textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  background: rgba(255, 255, 255, 0.75);
  padding: 0.8rem 0.9rem;
  font: inherit;
  color: var(--ink);
}

.form input:focus,
.form textarea:focus {
  outline: 2px solid rgba(31, 143, 106, 0.35);
  border-color: var(--signal);
}

.form textarea {
  min-height: 140px;
  resize: vertical;
}

.note {
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.site-footer {
  border-top: 1px solid var(--line);
  margin-top: 3rem;
  padding: 2rem 0 2.5rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

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

@keyframes dash {
  to {
    stroke-dashoffset: -320;
  }
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.55;
    transform: scale(1);
  }
  50% {
    opacity: 0.9;
    transform: scale(1.05);
  }
}

@keyframes nodePulse {
  0%,
  100% {
    opacity: 0.45;
    transform: scale(1);
  }
  50% {
    opacity: 0.9;
    transform: scale(1.35);
  }
}

@media (max-width: 900px) {
  .hero,
  .split,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
    padding-top: 2.5rem;
  }

  .nav-links {
    gap: 0.9rem;
  }

  .nav-links .hide-sm {
    display: none;
  }
}

@media (max-width: 640px) {
  .wrap {
    width: min(100% - 1.5rem, 1120px);
  }

  .nav-links a:not(.btn) {
    display: none;
  }

  .lang-label {
    display: none;
  }
}

/* —— locale / RTL / richer layout —— */
html[dir="rtl"] body {
  font-family: var(--font-arabic);
}

html[dir="rtl"] .brand-mark,
html[dir="rtl"] .hero-brand,
html[dir="rtl"] .hero h1,
html[dir="rtl"] .section-head h2,
html[dir="rtl"] .page-hero h1,
html[dir="rtl"] .panel h3 {
  font-family: var(--font-arabic);
  letter-spacing: 0;
}

html[dir="rtl"] .code-block,
html[dir="rtl"] .path,
html[dir="rtl"] .method,
html[dir="rtl"] .brand-sub,
html[dir="rtl"] .mesh-label {
  direction: ltr;
  text-align: left;
  font-family: var(--font-mono);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.lang-wrap {
  display: flex;
  align-items: center;
  gap: 0.55rem;
}

.lang-label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.lang-switch {
  display: inline-flex;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.65);
}

.lang-switch button {
  border: 0;
  background: transparent;
  color: var(--ink-soft);
  font-family: var(--font-body);
  font-size: 0.82rem;
  font-weight: 650;
  padding: 0.45rem 0.65rem;
  cursor: pointer;
}

.lang-switch button + button {
  border-inline-start: 1px solid var(--line);
}

.lang-switch button.is-active,
.lang-switch button[aria-pressed="true"] {
  background: var(--ink);
  color: var(--paper);
}

.region-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-bottom: 1.1rem;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.55);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.02em;
  color: var(--ink-soft);
}

.region-dot {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--signal);
  box-shadow: 0 0 0 4px rgba(31, 143, 106, 0.15);
}

.triple {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.catalog-list {
  list-style: none;
  display: grid;
  gap: 0.75rem;
}

.catalog-list li {
  display: grid;
  grid-template-columns: minmax(11rem, 0.4fr) 1fr;
  gap: 1rem;
  align-items: baseline;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--line);
}

.catalog-list code {
  font-family: var(--font-mono);
  font-size: 0.86rem;
  color: var(--signal-deep);
}

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-item {
  display: grid;
  grid-template-columns: 7.5rem 1fr;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--line);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--ink-soft);
}

.state-pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--signal-deep);
  background: rgba(31, 143, 106, 0.12);
  border-radius: 0.3rem;
  padding: 0.2rem 0.45rem;
}

@media (max-width: 900px) {
  .triple {
    grid-template-columns: 1fr;
  }

  .catalog-list li,
  .timeline-item {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
}