:root {
  color-scheme: dark;
  --ink: #111418;
  --panel: #171c22;
  --text: #f6f7f8;
  --body: #e7eaed;
  --muted: #a3acb5;
  --muted-bright: #c2c8ce;
  --accent: #42cdbd;
  --accent-bright: #a9ece5;
  --blue: #7db9f8;
  --red: #ff8f8f;
  --line: rgba(184, 231, 225, 0.14);
  --line-strong: rgba(184, 231, 225, 0.3);
  --font: "Avenir Next", Avenir, "Segoe UI", Helvetica, Arial, sans-serif;
  --shell: min(1280px, calc(100vw - 48px));
  --shadow: 0 40px 100px rgba(0, 0, 0, 0.5), inset 0 0 0 1px rgba(255, 255, 255, 0.02);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  position: relative;
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  background: var(--ink);
  color: var(--body);
  font-family: var(--font);
  font-synthesis: none;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* The field: a quiet vertical gradient with warm and green light in the four corners */

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(circle at 0% 0%, rgba(240, 138, 75, 0.2), transparent 40%),
    radial-gradient(circle at 100% 0%, rgba(40, 179, 154, 0.22), transparent 42%),
    radial-gradient(circle at 0% 100%, rgba(40, 179, 154, 0.15), transparent 40%),
    radial-gradient(circle at 100% 100%, rgba(240, 138, 75, 0.15), transparent 42%),
    linear-gradient(180deg, #0a0e13 0%, var(--ink) 45%, #10161c 100%);
  content: "";
  pointer-events: none;
}

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

a {
  color: inherit;
}

::selection {
  background: var(--accent);
  color: var(--ink);
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--text);
  outline-offset: 4px;
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 9px;
  background: var(--text);
  color: var(--ink);
  font-weight: 600;
  text-decoration: none;
  transform: translateY(-180%);
}

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

/* Type */

h1,
h2,
h3 {
  margin: 0;
  color: var(--text);
  font-weight: 600;
  letter-spacing: -0.045em;
  line-height: 0.96;
  text-wrap: balance;
}

h1 {
  max-width: 11ch;
  font-size: clamp(3.4rem, 6.4vw, 6.4rem);
}

h2 {
  max-width: 14ch;
  font-size: clamp(2.5rem, 4.4vw, 4.2rem);
}

h3 {
  font-size: clamp(1.35rem, 1.7vw, 1.7rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.accent {
  background: linear-gradient(100deg, var(--accent-bright), var(--accent) 48%, var(--blue));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

p {
  margin: 0;
}

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

.lede {
  max-width: 36rem;
  margin: 26px 0 0;
  color: var(--muted-bright);
  font-size: clamp(1.2rem, 1.6vw, 1.5rem);
  line-height: 1.4;
}

.note {
  max-width: 46rem;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.55;
}

.text-link {
  display: inline-block;
  margin-top: 18px;
  color: var(--accent-bright);
  font-weight: 600;
  text-decoration: none;
  border-bottom: 1px solid rgba(169, 236, 229, 0.4);
  padding-bottom: 2px;
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--text);
  border-color: var(--text);
}

/* Buttons */

.button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 13px 24px;
  border: 1px solid transparent;
  border-radius: 14px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.98rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease, border-color 160ms ease, color 160ms ease, opacity 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
}

.button.primary {
  background: linear-gradient(135deg, var(--accent-bright), var(--accent) 42%, var(--blue));
  color: #07211d;
  box-shadow: 0 14px 40px rgba(66, 205, 189, 0.22);
}

.button.primary:hover,
.button.primary:focus-visible {
  box-shadow: 0 18px 48px rgba(66, 205, 189, 0.32);
}

.button.secondary {
  background:
    linear-gradient(rgba(24, 29, 35, 0.78), rgba(17, 20, 24, 0.72)) padding-box,
    linear-gradient(135deg, rgba(125, 185, 248, 0.88), rgba(66, 205, 189, 0.8)) border-box;
  box-shadow:
    inset 0 1px 0 rgba(255, 255, 255, 0.14),
    0 12px 32px rgba(0, 0, 0, 0.25);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  backdrop-filter: blur(18px) saturate(140%);
}

.button.secondary:hover,
.button.secondary:focus-visible {
  background:
    linear-gradient(rgba(66, 205, 189, 0.15), rgba(17, 20, 24, 0.72)) padding-box,
    linear-gradient(135deg, var(--blue), var(--accent)) border-box;
}

.button:disabled {
  opacity: 0.6;
  transform: none;
  cursor: progress;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

/* Hero */

.hero {
  position: relative;
  display: grid;
  align-items: center;
  padding: clamp(48px, 7vh, 80px) 0 clamp(40px, 5vw, 64px);
  overflow: clip;
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
  align-items: center;
  gap: clamp(36px, 5vw, 72px);
}

.hero-copy {
  min-width: 0;
}

.aside {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 1rem;
}

.aside a {
  color: var(--accent-bright);
  font-weight: 600;
  text-underline-offset: 0.2em;
}

.tools {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 0;
  margin-top: 26px;
  color: var(--muted);
  font-size: 0.95rem;
}

.tools li + li::before {
  margin: 0 12px;
  color: var(--line-strong);
  content: "·";
}

/* Real captures */

.phone {
  width: 100%;
  margin: 0;
  padding: 9px;
  overflow: hidden;
  border: 1px solid rgba(160, 172, 184, 0.28);
  border-radius: 36px;
  background: #0b0f14;
  box-shadow: var(--shadow);
}

.phone img {
  width: 100%;
  border-radius: 27px;
}

.stage {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: start;
  gap: 22px;
}

.stage::before {
  position: absolute;
  inset: 10% -8% -8%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(66, 205, 189, 0.12), transparent 62%);
  filter: blur(30px);
  content: "";
  pointer-events: none;
}

.stage .phone {
  position: relative;
}

.phone-second {
  margin-top: 56px;
}

/* Bands: one sentence and its action */

.band {
  padding: clamp(36px, 4vw, 48px) 0;
  border-top: 1px solid var(--line);
}

.band-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  align-items: center;
  gap: clamp(32px, 5vw, 72px);
}

.band h2 {
  max-width: 18ch;
  font-size: clamp(1.9rem, 3vw, 2.8rem);
}

.band-copy {
  display: grid;
  justify-items: start;
  gap: 18px;
  color: var(--body);
  font-size: clamp(1.05rem, 1.25vw, 1.2rem);
  line-height: 1.5;
}

.band-copy .button {
  margin-top: 4px;
}

/* Chapters */

.chapter {
  padding: clamp(48px, 5vw, 64px) 0;
  border-top: 1px solid var(--line);
}

.chapter-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: end;
  gap: clamp(24px, 4vw, 64px);
  margin-bottom: clamp(36px, 5vw, 60px);
}

.chapter-head p {
  max-width: 34rem;
  color: var(--body);
  font-size: clamp(1.05rem, 1.25vw, 1.25rem);
  line-height: 1.55;
}

.chapter-head blockquote {
  max-width: 34rem;
  margin: 0;
  padding-left: 20px;
  border-left: 3px solid var(--accent);
  color: var(--text);
  font-size: clamp(1.1rem, 1.35vw, 1.35rem);
  line-height: 1.45;
}

.cells {
  display: grid;
  border-top: 1px solid var(--line);
}

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

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

.cells article {
  display: grid;
  align-content: start;
  gap: 14px;
  padding: 28px 28px 32px 0;
  border-right: 1px solid var(--line);
  margin-right: 28px;
}

.cells article:last-child {
  border-right: 0;
  margin-right: 0;
}

.cells p {
  color: var(--body);
  font-size: 1rem;
  line-height: 1.55;
}

.cells ul {
  display: grid;
  gap: 8px;
  color: var(--muted-bright);
  font-size: 0.95rem;
}

.cells li {
  position: relative;
  padding-left: 22px;
}

.cells li::before {
  position: absolute;
  top: 0.68em;
  left: 0;
  width: 11px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  content: "";
}

/* Metrics */

.facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--line);
}

.facts article {
  display: grid;
  align-content: start;
  gap: 8px;
  padding: 26px 26px 28px;
  background: rgba(17, 20, 24, 0.86);
}

.facts strong {
  color: var(--text);
  font-size: clamp(1.5rem, 2.2vw, 2.1rem);
  font-weight: 600;
  letter-spacing: -0.04em;
  line-height: 1;
}

.facts p {
  color: var(--muted-bright);
  font-size: 0.98rem;
}

.evidence {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin: 26px 0 0;
  color: var(--muted-bright);
  font-size: 1rem;
}

.evidence a {
  color: var(--accent-bright);
  font-weight: 600;
  text-underline-offset: 0.2em;
}

.evidence b {
  color: var(--text);
  font-weight: 600;
}

/* Proof */

.proof-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 320px);
  align-items: center;
  gap: clamp(32px, 6vw, 96px);
  padding: clamp(36px, 5vw, 56px) 0;
  border-top: 1px solid var(--line);
}

.proof-row-flip {
  grid-template-columns: minmax(0, 320px) minmax(0, 1fr);
}

.proof-row-flip .proof-copy {
  order: 2;
}

.proof-copy {
  display: grid;
  gap: 16px;
  max-width: 34rem;
}

.proof-copy p {
  color: var(--body);
  font-size: clamp(1.05rem, 1.25vw, 1.25rem);
  line-height: 1.55;
}

.proof-row .pair {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: start;
  gap: 18px;
}

.proof-row:has(.pair) {
  grid-template-columns: minmax(0, 1fr) minmax(0, 520px);
}

/* Deployment footprints */

.modes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.mode {
  display: grid;
  align-content: start;
  gap: 16px;
  padding: clamp(26px, 3vw, 36px);
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(23, 28, 34, 0.55);
}

.mode h3 {
  font-size: clamp(1.7rem, 2.4vw, 2.2rem);
}

.mode-lead {
  color: var(--text);
  font-size: clamp(1.1rem, 1.3vw, 1.3rem);
}

.mode p {
  color: var(--body);
  line-height: 1.55;
}

.mode ul {
  display: grid;
  gap: 8px;
  color: var(--muted-bright);
}

.mode li {
  position: relative;
  padding-left: 22px;
}

.mode li::before {
  position: absolute;
  top: 0.68em;
  left: 0;
  width: 11px;
  height: 2px;
  border-radius: 2px;
  background: var(--accent);
  content: "";
}

.measure {
  padding-top: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted-bright);
}

.measure b {
  margin-right: 8px;
  color: var(--accent-bright);
  font-weight: 600;
}

/* Local path */

.flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 18px;
  margin-bottom: clamp(32px, 4vw, 48px);
}

.flow > div {
  display: grid;
  gap: 4px;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: rgba(23, 28, 34, 0.55);
}

.flow strong {
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.flow span {
  color: var(--muted-bright);
}

.flow i {
  color: var(--accent);
  font-size: 1.6rem;
  font-style: normal;
}

/* Closing card and calls */

.closing-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 32px;
  margin-top: clamp(36px, 5vw, 60px);
  padding: clamp(28px, 4vw, 48px);
  border: 1px solid transparent;
  border-radius: 28px;
  background:
    linear-gradient(#141920, #10141a) padding-box,
    linear-gradient(135deg, rgba(125, 185, 248, 0.55), rgba(66, 205, 189, 0.55)) border-box;
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.45);
}

.closing-card p {
  max-width: 40rem;
  color: var(--body);
  font-size: clamp(1.1rem, 1.4vw, 1.35rem);
  line-height: 1.5;
}

.use-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.use {
  display: grid;
  align-content: start;
  justify-items: start;
  gap: 16px;
  padding: clamp(26px, 3vw, 36px);
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(23, 28, 34, 0.55);
}

.use .lead {
  color: var(--muted-bright);
  font-size: 1.05rem;
}

.use h2 {
  font-size: clamp(1.9rem, 2.8vw, 2.6rem);
}

.use p {
  color: var(--body);
  line-height: 1.5;
}

.use .button {
  margin-top: 6px;
}

/* Inquiry */

.inquiry {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 520px);
  align-items: start;
  gap: clamp(32px, 6vw, 96px);
}

.inquiry-copy {
  display: grid;
  gap: 22px;
}

.inquiry-copy p {
  max-width: 32rem;
  color: var(--body);
  font-size: clamp(1.05rem, 1.25vw, 1.25rem);
  line-height: 1.55;
}

.inquiry-form {
  display: grid;
  gap: 8px;
  padding: clamp(24px, 3vw, 36px);
  border: 1px solid transparent;
  border-radius: 24px;
  background:
    linear-gradient(#141920, #10141a) padding-box,
    linear-gradient(135deg, rgba(125, 185, 248, 0.55), rgba(66, 205, 189, 0.55)) border-box;
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.45);
}

.inquiry-form label {
  margin-top: 8px;
  color: var(--text);
  font-size: 0.95rem;
  font-weight: 600;
}

.inquiry-form input,
.inquiry-form textarea {
  width: 100%;
  min-height: 50px;
  padding: 12px 14px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  background: rgba(13, 17, 23, 0.7);
  color: var(--text);
  font: inherit;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.inquiry-form textarea {
  resize: vertical;
}

.inquiry-form input:focus,
.inquiry-form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(66, 205, 189, 0.16);
}

.inquiry-form .button {
  width: 100%;
  margin-top: 16px;
}

.hp {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.form-note {
  min-height: 1.4em;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.form-note.ok {
  color: var(--accent-bright);
}

.form-note.bad {
  color: var(--red);
}

/* Footer */

.site-footer {
  padding: 34px 0 44px;
  border-top: 1px solid var(--line);
}

.footer-layout {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 32px;
}

.footer-layout p {
  color: var(--muted);
  font-size: 0.88rem;
}

.footer-layout p a {
  color: var(--muted-bright);
  text-underline-offset: 0.18em;
}

.footer-layout nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 0.86rem;
}

.footer-layout nav a {
  color: var(--muted-bright);
  text-decoration: none;
}

.footer-layout nav a:hover,
.footer-layout nav a:focus-visible {
  color: var(--text);
}

/* Reveal on scroll (only when script is running) */

html[data-js] [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 700ms ease, transform 700ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

html[data-js] [data-reveal][data-inview] {
  opacity: 1;
  transform: none;
}

/* Responsive */

@media (max-width: 1000px) {
  .hero {
    min-height: auto;
    padding: 72px 0 64px;
  }

  .hero-layout,
  .band-layout,
  .chapter-head,
  .modes,
  .use-grid,
  .inquiry,
  .closing-card {
    grid-template-columns: 1fr;
  }

  .stage {
    max-width: 560px;
  }

  .cells-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cells-4 article:nth-child(2n) {
    border-right: 0;
    margin-right: 0;
  }

  .cells-4 article:nth-child(-n+2) {
    border-bottom: 1px solid var(--line);
  }

  .cells-3 {
    grid-template-columns: 1fr;
  }

  .cells-3 article {
    margin-right: 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .cells-3 article:last-child {
    border-bottom: 0;
  }

  .facts {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .proof-row,
  .proof-row-flip,
  .proof-row:has(.pair) {
    grid-template-columns: 1fr;
  }

  .proof-row-flip .proof-copy {
    order: 0;
  }

  .proof-row .phone {
    max-width: 320px;
  }

  .proof-row .pair {
    max-width: 560px;
  }

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

  .flow i {
    text-align: center;
  }
}

@media (max-width: 560px) {
  :root {
    --shell: calc(100vw - 32px);
  }

  h1 {
    font-size: clamp(2.7rem, 12.5vw, 3.6rem);
  }

  h2 {
    font-size: clamp(2.1rem, 10vw, 2.9rem);
  }

  .button {
    width: 100%;
  }

  .cells-4 {
    grid-template-columns: 1fr;
  }

  .cells article {
    margin-right: 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding-right: 0;
  }

  .cells article:last-child {
    border-bottom: 0;
  }

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

  .stage {
    gap: 12px;
  }

  .phone {
    padding: 6px;
    border-radius: 24px;
  }

  .phone img {
    border-radius: 18px;
  }

  .phone-second {
    margin-top: 32px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }

  html[data-js] [data-reveal] {
    opacity: 1;
    transform: none;
  }
}