:root {
  color-scheme: dark;
  --bg: #06100f;
  --bg-raised: #0d1d1a;
  --surface: #102622;
  --surface-soft: #16342f;
  --text: #f1fbf7;
  --muted: #9db3ad;
  --line: rgba(142, 204, 190, 0.22);
  --primary: #2de0cb;
  --primary-ink: #031a18;
  --signal: #ffb64c;
  --signal-deep: #9d651c;
  --shadow: rgba(0, 0, 0, 0.36);
  --max: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  min-width: 320px;
  margin: 0;
  background:
    linear-gradient(180deg, rgba(45, 224, 203, 0.08), transparent 26rem),
    repeating-linear-gradient(
      90deg,
      rgba(255, 255, 255, 0.025) 0,
      rgba(255, 255, 255, 0.025) 1px,
      transparent 1px,
      transparent 7.5rem
    ),
    var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  letter-spacing: 0;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 76px;
  margin: 0;
  padding: 12px max(20px, calc((100% - var(--max)) / 2));
  border-bottom: 1px solid rgba(142, 204, 190, 0.16);
  background:
    linear-gradient(180deg, rgba(241, 251, 247, 0.08), transparent),
    rgba(6, 16, 15, 0.76);
  box-shadow: 0 18px 42px rgba(0, 0, 0, 0.22);
  -webkit-backdrop-filter: blur(22px) saturate(1.25);
  backdrop-filter: blur(22px) saturate(1.25);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--text);
  font-size: 0.98rem;
  font-weight: 750;
}

.brand img {
  border-radius: 9px;
  box-shadow: 0 12px 28px var(--shadow);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 650;
}

.nav-links a {
  transition: color 160ms ease;
}

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

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(16, 38, 34, 0.86);
  color: var(--text);
}

.menu-button span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  border-radius: 999px;
  background: currentColor;
}

.mobile-nav {
  display: none;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(360px, 0.85fr);
  align-items: center;
  gap: 68px;
  width: min(var(--max), calc(100% - 40px));
  min-height: auto;
  margin: 0 auto;
  padding: 54px 0 34px;
}

.signal-grid {
  position: absolute;
  top: 14%;
  left: -18px;
  z-index: -1;
  display: grid;
  grid-template-columns: repeat(6, auto);
  gap: 14px;
  opacity: 0.42;
}

.signal-grid span,
.morse-line,
.floating-signal span {
  font-family: "SF Mono", "Roboto Mono", ui-monospace, monospace;
}

.signal-grid span {
  height: 7px;
  border-radius: 999px;
  background: var(--signal);
}

.signal-grid .dot {
  width: 7px;
}

.signal-grid .dash {
  width: 38px;
}

.hero-copy h1,
.section-heading h2,
.privacy-copy h2,
.download-section h2 {
  margin: 0;
  color: var(--text);
  font-weight: 840;
  line-height: 0.98;
}

.hero-copy h1 {
  max-width: 11ch;
  font-size: clamp(4.4rem, 9vw, 8.4rem);
}

.hero-copy p {
  max-width: 630px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: clamp(1.14rem, 1.8vw, 1.48rem);
  line-height: 1.5;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 20px;
  border-radius: 8px;
  font-size: 0.94rem;
  font-weight: 780;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--primary);
  color: var(--primary-ink);
  box-shadow: 0 20px 45px rgba(45, 224, 203, 0.2);
}

.button-secondary {
  border: 1px solid var(--line);
  background: rgba(16, 38, 34, 0.72);
  color: var(--text);
}

.proof-line {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 26px;
  color: var(--signal);
  font-size: 0.82rem;
  font-weight: 760;
  text-transform: uppercase;
}

.proof-line span + span::before {
  content: ".";
  margin-right: 16px;
  color: var(--muted);
}

.hero-product {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 650px;
}

.phone-shell {
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 34px;
  background: #030807;
  box-shadow:
    0 28px 70px rgba(0, 0, 0, 0.48),
    0 0 0 10px rgba(10, 25, 22, 0.86);
}

.phone-primary {
  width: min(72%, 320px);
  height: min(72vh, 660px);
  transform: rotate(1.5deg);
}

.phone-primary img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top;
}

.floating-signal {
  position: absolute;
  right: 0;
  bottom: 24%;
  width: min(240px, 48%);
  padding: 18px;
  border: 1px solid rgba(255, 182, 76, 0.42);
  border-radius: 8px;
  background: rgba(13, 29, 26, 0.88);
  box-shadow: 0 24px 54px rgba(0, 0, 0, 0.38);
}

.floating-signal span {
  display: block;
  color: var(--signal);
  font-size: 1.2rem;
  letter-spacing: 0.09em;
}

.floating-signal strong {
  display: block;
  margin-top: 8px;
  color: var(--text);
  font-size: 0.86rem;
}

.signal-meter {
  position: absolute;
  top: 16%;
  left: 0;
  display: flex;
  align-items: end;
  gap: 8px;
  height: 76px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(13, 29, 26, 0.78);
}

.signal-meter span {
  width: 9px;
  border-radius: 999px 999px 2px 2px;
  background: var(--primary);
  animation: pulse 1.45s ease-in-out infinite;
}

.signal-meter span:nth-child(1) {
  height: 22px;
}

.signal-meter span:nth-child(2) {
  height: 46px;
  animation-delay: 120ms;
}

.signal-meter span:nth-child(3) {
  height: 34px;
  animation-delay: 240ms;
}

.signal-meter span:nth-child(4) {
  height: 58px;
  animation-delay: 360ms;
}

.feature-strip,
.alphabets-section,
.privacy-section,
.download-section {
  border-top: 1px solid var(--line);
}

.feature-strip,
.alphabets-section {
  padding: 92px max(20px, calc((100% - var(--max)) / 2));
}

.section-heading {
  display: grid;
  grid-template-columns: 0.86fr 0.7fr;
  gap: 46px;
  align-items: end;
  margin-bottom: 42px;
}

.section-heading.compact {
  max-width: 830px;
}

.section-heading h2,
.privacy-copy h2,
.download-section h2 {
  font-size: clamp(2.15rem, 4.2vw, 4.7rem);
}

.section-heading p,
.privacy-copy p,
.download-section p,
.workflow-card p,
.rtl-callout p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.65;
}

.workflow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.workflow-card {
  min-height: 250px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(22, 52, 47, 0.84), rgba(13, 29, 26, 0.86));
}

.card-index {
  color: var(--signal);
  font-family: "SF Mono", "Roboto Mono", ui-monospace, monospace;
  font-size: 0.82rem;
  font-weight: 760;
}

.workflow-card h3,
.rtl-callout h3 {
  margin: 26px 0 12px;
  color: var(--text);
  font-size: 1.38rem;
}

.morse-line {
  margin-top: 28px;
  color: var(--primary);
  font-size: 1.05rem;
}

.tap-row,
.beam-row {
  display: flex;
  gap: 10px;
  margin-top: 28px;
}

.tap-row span {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--primary);
}

.tap-row span:nth-child(2) {
  width: 72px;
  border-radius: 999px;
  background: var(--signal);
}

.beam-row span {
  width: 42px;
  height: 12px;
  border-radius: 999px;
  background: var(--signal);
}

.screens-preview {
  display: grid;
  grid-template-columns: 0.86fr 1fr 0.86fr;
  gap: 18px;
  align-items: center;
  max-width: 940px;
  margin: 56px auto 0;
}

.screens-preview figure,
.rtl-callout figure {
  margin: 0;
}

.screens-preview figure {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 26px;
  background: #030807;
  box-shadow: 0 26px 58px rgba(0, 0, 0, 0.34);
}

.screens-preview figure:nth-child(2) {
  transform: translateY(26px);
}

.alphabets-section {
  background: linear-gradient(180deg, rgba(255, 182, 76, 0.06), transparent 42%);
}

.alphabet-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.alphabet-board article {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(16, 38, 34, 0.78);
}

.alphabet-card-featured {
  grid-column: 2;
}

.alphabet-card-featured + article {
  grid-column: 1;
}

.alphabet-board span {
  display: block;
  color: var(--muted);
  font-size: 0.88rem;
}

.alphabet-samples {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 14px;
  margin-top: 10px;
}

.alphabet-samples strong {
  color: var(--text);
  font-family: "SF Mono", "Roboto Mono", ui-monospace, monospace;
  font-size: 0.94rem;
  line-height: 1.35;
  white-space: nowrap;
}

.rtl-callout {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(260px, 0.44fr);
  gap: 40px;
  align-items: center;
  margin-top: 62px;
}

.rtl-callout > div {
  padding: 34px;
  border-left: 3px solid var(--signal);
  background: rgba(13, 29, 26, 0.5);
}

.rtl-callout h3 {
  margin-top: 0;
  font-size: clamp(1.8rem, 3vw, 3.1rem);
  line-height: 1.05;
}

.rtl-callout figure {
  overflow: hidden;
  max-width: 310px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background: #030807;
  box-shadow: 0 26px 58px rgba(0, 0, 0, 0.34);
}

.privacy-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(300px, 0.54fr);
  gap: 56px;
  align-items: center;
  padding: 96px max(20px, calc((100% - var(--max)) / 2));
  background: #081412;
}

.privacy-copy p {
  max-width: 720px;
  margin-top: 24px;
}

.privacy-stack {
  display: grid;
  gap: 12px;
}

.privacy-stack span {
  padding: 18px 20px;
  border: 1px solid rgba(45, 224, 203, 0.24);
  border-radius: 8px;
  background: rgba(16, 38, 34, 0.8);
  color: var(--text);
  font-weight: 720;
}

.section-link {
  display: inline-flex;
  margin-top: 24px;
  color: var(--primary);
  font-size: 0.94rem;
  font-weight: 780;
}

.policy-page {
  width: min(860px, calc(100% - 40px));
  margin: 0 auto;
  padding: 84px 0 104px;
}

.policy-hero {
  padding-bottom: 42px;
  border-bottom: 1px solid var(--line);
}

.policy-date {
  margin: 0 0 18px;
  color: var(--signal);
  font-size: 0.82rem;
  font-weight: 780;
  text-transform: uppercase;
}

.policy-hero h1 {
  margin: 0;
  color: var(--text);
  font-size: clamp(3.2rem, 8vw, 6.6rem);
  font-weight: 840;
  line-height: 0.98;
}

.policy-hero p {
  max-width: 760px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: clamp(1.08rem, 2vw, 1.28rem);
  line-height: 1.62;
}

.policy-content {
  display: grid;
  gap: 0;
}

.policy-content article {
  display: grid;
  grid-template-columns: minmax(170px, 0.35fr) minmax(0, 1fr);
  gap: 42px;
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.policy-content h2 {
  margin: 0;
  color: var(--text);
  font-size: 1.18rem;
  line-height: 1.2;
}

.policy-content p {
  margin: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.72;
}

.policy-content a,
.site-footer a {
  color: var(--primary);
}

.download-section {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: 74px max(20px, calc((100% - var(--max)) / 2));
}

.download-section p {
  margin-top: 16px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 28px 0 38px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.88rem;
}

@keyframes pulse {
  0%,
  100% {
    opacity: 0.42;
    transform: scaleY(0.72);
  }

  50% {
    opacity: 1;
    transform: scaleY(1);
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

@media (max-width: 940px) {
  .nav-links {
    display: none;
  }

  .menu-button {
    display: block;
  }

  .mobile-nav {
    position: fixed;
    inset: 76px 20px auto;
    z-index: 19;
    display: none;
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(6, 16, 15, 0.96);
    box-shadow: 0 22px 50px rgba(0, 0, 0, 0.42);
  }

  .mobile-nav.is-open {
    display: grid;
  }

  .mobile-nav a {
    padding: 12px;
    color: var(--text);
    font-weight: 720;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 36px;
    padding-top: 18px;
  }

  .hero-copy h1 {
    max-width: 9ch;
  }

  .hero-product {
    min-height: 560px;
  }

  .section-heading,
  .workflow,
  .alphabet-board,
  .rtl-callout,
  .privacy-section,
  .policy-content article {
    grid-template-columns: 1fr;
  }

  .alphabet-card-featured,
  .alphabet-samples {
    grid-column: auto;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .screens-preview {
    grid-template-columns: repeat(3, minmax(210px, 1fr));
    overflow-x: auto;
    padding-bottom: 18px;
  }

  .screens-preview figure:nth-child(2) {
    transform: none;
  }
}

@media (max-width: 640px) {
  body {
    background:
      linear-gradient(180deg, rgba(45, 224, 203, 0.08), transparent 22rem),
      var(--bg);
  }

  .hero,
  .site-footer {
    width: min(100% - 28px, var(--max));
  }

  .site-header {
    padding-right: 14px;
    padding-left: 14px;
  }

  .hero {
    min-height: auto;
    gap: 22px;
    padding-bottom: 28px;
  }

  .hero-copy h1 {
    max-width: 10ch;
    font-size: clamp(3rem, 13vw, 3.7rem);
  }

  .hero-copy p {
    margin-top: 18px;
    font-size: 1rem;
  }

  .hero-actions {
    gap: 10px;
    margin-top: 22px;
  }

  .button {
    min-height: 46px;
    padding: 0 14px;
    font-size: 0.84rem;
  }

  .proof-line {
    gap: 10px;
    margin-top: 18px;
    font-size: 0.76rem;
  }

  .proof-line span + span::before {
    margin-right: 10px;
  }

  .hero-product {
    min-height: 170px;
  }

  .phone-primary {
    width: min(38%, 150px);
    height: 170px;
    border-radius: 24px;
    box-shadow:
      0 22px 48px rgba(0, 0, 0, 0.44),
      0 0 0 7px rgba(10, 25, 22, 0.86);
  }

  .floating-signal {
    right: 4px;
    bottom: 2%;
    width: min(164px, 56%);
    padding: 14px;
  }

  .floating-signal span {
    font-size: 0.98rem;
  }

  .signal-meter {
    left: 2px;
    top: 8%;
    height: 62px;
    padding: 10px;
  }

  .feature-strip,
  .alphabets-section,
  .privacy-section,
  .download-section {
    padding-right: 14px;
    padding-left: 14px;
  }

  .feature-strip,
  .alphabets-section {
    padding-top: 68px;
    padding-bottom: 68px;
  }

  .section-heading {
    gap: 18px;
  }

  .section-heading h2,
  .privacy-copy h2,
  .download-section h2 {
    font-size: clamp(2.2rem, 11vw, 3.2rem);
  }

  .workflow-card {
    min-height: 220px;
  }

  .screens-preview {
    grid-template-columns: repeat(3, 74vw);
  }

  .rtl-callout > div {
    padding: 22px;
  }

  .rtl-callout figure {
    max-width: 260px;
    margin: 0 auto;
  }

  .privacy-section {
    gap: 30px;
  }

  .policy-page {
    width: min(100% - 28px, 860px);
    padding-top: 58px;
    padding-bottom: 76px;
  }

  .policy-content article {
    gap: 12px;
    padding: 26px 0;
  }

  .download-section,
  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}