:root {
  color-scheme: dark;
  --background: #030407;
  --surface: rgba(10, 15, 22, 0.66);
  --surface-hover: rgba(14, 22, 32, 0.8);
  --line: rgba(159, 211, 238, 0.14);
  --line-strong: rgba(125, 211, 252, 0.3);
  --text: #f4f8fb;
  --muted: #9caeba;
  --accent: #7dd3fc;
  --accent-strong: #38bdf8;
  --max-width: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--background);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background:
    radial-gradient(circle at 74% 19%, rgba(56, 189, 248, 0.07), transparent 26rem),
    linear-gradient(rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    var(--background);
  background-size: auto, 64px 64px, 64px 64px, auto;
  font-family:
    Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

.skip-link {
  position: fixed;
  z-index: 10;
  top: 1rem;
  left: 1rem;
  padding: 0.75rem 1rem;
  color: var(--background);
  background: var(--accent);
  border-radius: 0.25rem;
  transform: translateY(-180%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.page-shell {
  width: min(calc(100% - 3rem), var(--max-width));
  margin: 0 auto;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 6rem;
  border-bottom: 1px solid var(--line);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 760;
  letter-spacing: 0.2em;
}

.brand img {
  display: block;
}

.header-contact {
  color: var(--muted);
  font-size: 0.875rem;
  text-decoration-color: rgba(125, 211, 252, 0.45);
  text-underline-offset: 0.35rem;
  transition: color 160ms ease;
}

.header-contact:hover,
.header-contact:focus-visible {
  color: var(--accent);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(18rem, 0.7fr);
  gap: clamp(3rem, 8vw, 8rem);
  align-items: center;
  min-height: min(47rem, calc(100vh - 6rem));
  padding: clamp(5rem, 10vw, 9rem) 0;
}

.hero-copy {
  max-width: 52rem;
}

.eyebrow,
.section-index,
.feature-number,
.signal-label {
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  margin: 0 0 2rem;
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 650;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow span {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: var(--accent-strong);
  box-shadow: 0 0 1rem rgba(56, 189, 248, 0.8);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 1.8rem;
  font-size: clamp(3.25rem, 7.2vw, 6.75rem);
  font-weight: 590;
  letter-spacing: -0.065em;
  line-height: 0.94;
  text-wrap: balance;
}

h1 span {
  display: block;
  color: var(--muted);
}

.hero-summary {
  max-width: 43rem;
  margin-bottom: 2.25rem;
  color: #b5c3cd;
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
  line-height: 1.65;
}

.primary-link {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  padding: 0.95rem 1.15rem;
  border: 1px solid var(--line-strong);
  border-radius: 0.35rem;
  color: var(--text);
  background: rgba(56, 189, 248, 0.06);
  font-size: 0.9rem;
  font-weight: 620;
  text-decoration: none;
  transition:
    background 160ms ease,
    border-color 160ms ease,
    transform 160ms ease;
}

.primary-link span:last-child {
  color: var(--accent);
}

.primary-link:hover,
.primary-link:focus-visible {
  border-color: var(--accent);
  background: rgba(56, 189, 248, 0.12);
  transform: translateY(-2px);
}

.signal {
  position: relative;
  width: min(100%, 25rem);
  aspect-ratio: 1;
  justify-self: end;
}

.signal-halo,
.signal-orbit,
.signal-core {
  position: absolute;
  inset: 50% auto auto 50%;
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.signal-halo {
  border: 1px solid var(--line);
}

.signal-halo-outer {
  width: 100%;
  height: 100%;
  opacity: 0.65;
}

.signal-halo-inner {
  width: 67%;
  height: 67%;
  border-color: var(--line-strong);
  box-shadow:
    inset 0 0 4rem rgba(56, 189, 248, 0.05),
    0 0 5rem rgba(56, 189, 248, 0.06);
}

.signal-orbit {
  width: 35%;
  height: 35%;
  border: 1px solid rgba(125, 211, 252, 0.42);
}

.signal-core {
  width: 0.7rem;
  height: 0.7rem;
  background: #dff7ff;
  box-shadow:
    0 0 1rem rgba(125, 211, 252, 0.95),
    0 0 4rem rgba(56, 189, 248, 0.65);
  animation: signal-pulse 3.4s ease-in-out infinite;
}

.signal-orbit::after {
  position: absolute;
  top: 11%;
  right: 2%;
  width: 0.42rem;
  height: 0.42rem;
  border-radius: 50%;
  background: var(--accent-strong);
  box-shadow: 0 0 1.25rem var(--accent-strong);
  content: "";
}

.signal-label {
  position: absolute;
  color: #77909e;
  font-size: 0.65rem;
  letter-spacing: 0.18em;
}

.signal-label-top {
  top: 16%;
  right: 4%;
}

.signal-label-bottom {
  bottom: 14%;
  left: 3%;
}

@keyframes signal-pulse {
  0%,
  100% {
    transform: translate(-50%, -50%) scale(0.92);
    opacity: 0.8;
  }
  50% {
    transform: translate(-50%, -50%) scale(1.12);
    opacity: 1;
  }
}

.features {
  padding: clamp(5rem, 10vw, 9rem) 0;
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 2rem;
  align-items: end;
  margin-bottom: 4rem;
}

.section-index {
  margin-bottom: 0.5rem;
  color: #6f8794;
  font-size: 0.7rem;
  letter-spacing: 0.13em;
}

.section-heading h2 {
  max-width: 37rem;
  margin: 0;
  font-size: clamp(2.25rem, 4vw, 4rem);
  font-weight: 550;
  letter-spacing: -0.05em;
  line-height: 1.02;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.feature-card {
  min-height: 18rem;
  padding: clamp(1.75rem, 4vw, 3rem);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
  transition: background 180ms ease;
}

.feature-card:hover {
  background: var(--surface-hover);
}

.feature-number {
  margin-bottom: 4rem;
  color: var(--accent);
  font-size: 0.72rem;
}

.feature-card h3 {
  margin-bottom: 1rem;
  font-size: clamp(1.35rem, 2vw, 1.7rem);
  font-weight: 570;
  letter-spacing: -0.025em;
}

.feature-card p:last-child {
  max-width: 29rem;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.65;
}

.feature-card strong {
  color: #cdeefe;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.88em;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.principle {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: clamp(3rem, 9vw, 8rem);
  align-items: start;
  padding: clamp(5rem, 10vw, 9rem) 0;
  border-top: 1px solid var(--line);
}

.principle h2 {
  margin: 1.6rem 0 0;
  font-size: clamp(2.8rem, 5vw, 5.25rem);
  font-weight: 590;
  letter-spacing: -0.065em;
  line-height: 0.95;
}

.principle h2 span {
  color: var(--accent);
  font-weight: 350;
}

.principle > p {
  margin: 3.1rem 0 0;
  color: #c4d0d7;
  font-size: clamp(1.25rem, 2.1vw, 1.75rem);
  line-height: 1.55;
  text-wrap: balance;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 2rem;
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--line);
  color: #738894;
  font-size: 0.8rem;
}

.site-footer p {
  margin: 0;
}

.site-footer div {
  display: flex;
  gap: 2rem;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

@media (max-width: 820px) {
  .page-shell {
    width: min(calc(100% - 2rem), var(--max-width));
  }

  .site-header {
    min-height: 5rem;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 5rem 0 4rem;
  }

  .signal {
    width: min(76vw, 20rem);
    margin: 1rem auto 0;
    justify-self: center;
  }

  .section-heading,
  .principle {
    grid-template-columns: 1fr;
  }

  .section-heading {
    gap: 1.5rem;
    margin-bottom: 2.5rem;
  }

  .principle {
    gap: 1rem;
  }

  .principle > p {
    margin-top: 1.75rem;
  }
}

@media (max-width: 620px) {
  h1 {
    font-size: clamp(2.8rem, 14vw, 4.25rem);
  }

  .hero-summary {
    font-size: 1rem;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .feature-card {
    min-height: 15rem;
  }

  .feature-number {
    margin-bottom: 3rem;
  }

  .site-footer {
    flex-direction: column;
  }
}

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

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

/* --- NEW SECTIONS --- */

.product-preview {
  display: flex;
  justify-content: center;
  padding: 0 0 clamp(3.5rem, 7vw, 5.5rem);
}

.screenshot-wrapper {
  max-width: 1140px;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.screenshot-container {
  width: 100%;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
  border: 1px solid var(--line);
}

.screenshot-container img {
  width: 100%;
  height: auto;
  display: block;
}

.screenshot-caption {
  margin-top: 1.25rem;
  font-size: 0.85rem;
  color: var(--muted);
  text-align: center;
}

.audience, .how-it-works, .status {
  padding: clamp(4rem, 8vw, 6.5rem) 0;
  border-top: 1px solid var(--line);
}

.audience > p, .status > p {
  color: #c4d0d7;
  font-size: clamp(1.25rem, 2.1vw, 1.75rem);
  line-height: 1.55;
  text-wrap: balance;
  max-width: 52rem;
  margin-top: 1.5rem;
}

.process-steps {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
}

.process-steps li {
  background: var(--surface);
  padding: 2rem;
  border: 1px solid var(--line);
  transition: background 180ms ease;
  color: var(--muted);
  font-size: 1rem;
  line-height: 1.65;
}

.process-steps li:hover {
  background: var(--surface-hover);
}

.process-steps strong {
  display: block;
  margin-bottom: 1rem;
  color: #cdeefe;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.88em;
  font-weight: 600;
  letter-spacing: 0.04em;
}

@media (max-width: 820px) {
  .process-steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 620px) {
  .process-steps {
    grid-template-columns: 1fr;
  }
}