:root {
  --bg: #070908;
  --bg-soft: #0d1210;
  --surface: #121816;
  --surface-strong: #18211d;
  --text: #f5f1e8;
  --muted: #bcc3bb;
  --subtle: #87928b;
  --line: rgba(245, 241, 232, 0.16);
  --line-strong: rgba(245, 241, 232, 0.28);
  --accent: #d8a33e;
  --accent-dark: #9a6a1e;
  --green: #77a985;
  --steel: #8fa4ad;
  --shadow: rgba(0, 0, 0, 0.42);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

#system,
#capabilities,
#process,
#contact {
  scroll-margin-top: 96px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
  line-height: 1.6;
}

body::selection {
  background: var(--accent);
  color: #10100c;
}

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

button,
input,
textarea {
  font: inherit;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  right: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
  padding: 16px 44px;
  border-bottom: 1px solid rgba(245, 241, 232, 0.1);
  background: rgba(7, 9, 8, 0.58);
  backdrop-filter: blur(18px);
}

.brand,
.site-nav,
.hero-actions,
.signal-strip,
.site-footer {
  display: flex;
  align-items: center;
}

.brand {
  gap: 10px;
  font-weight: 700;
}

.brand-mark {
  display: block;
  width: 40px;
  height: 40px;
  object-fit: contain;
}

.brand-name {
  font-size: 1.15rem;
}

.site-nav {
  gap: 22px;
  color: var(--muted);
  font-size: 0.95rem;
}

.site-nav a,
.nav-cta,
.contact-mail {
  transition:
    color 160ms ease,
    border-color 160ms ease,
    background 160ms ease,
    transform 160ms ease;
}

.site-nav a:hover,
.contact-mail:hover {
  color: var(--text);
}

.nav-cta {
  min-height: 42px;
  padding: 9px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  color: var(--text);
  font-size: 0.94rem;
}

.nav-cta:hover {
  border-color: rgba(216, 163, 62, 0.62);
  background: rgba(216, 163, 62, 0.1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.lang-switch {
  display: inline-flex;
  overflow: hidden;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
}

.lang-option {
  min-height: 42px;
  padding: 8px 12px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition:
    color 160ms ease,
    background 160ms ease;
}

.lang-option + .lang-option {
  border-left: 1px solid var(--line);
}

.lang-option:hover {
  color: var(--text);
}

.lang-option[aria-pressed="true"] {
  background: rgba(216, 163, 62, 0.14);
  color: var(--accent);
}

.hero {
  position: relative;
  display: flex;
  min-height: 84svh;
  align-items: center;
  overflow: hidden;
  padding: 118px 44px 74px;
}

.hero-media,
.hero-poster,
.hero-video,
.hero-overlay {
  position: absolute;
  inset: 0;
}

.hero-media {
  z-index: 0;
  background: #0b0d0c;
}

.hero-poster {
  background: #0b0d0c;
}

.hero-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.74;
}

.hero-video.is-unavailable {
  opacity: 0;
}

.hero-overlay {
  background:
    radial-gradient(circle at 70% 32%, rgba(216, 163, 62, 0.16), transparent 28%),
    linear-gradient(180deg, rgba(7, 9, 8, 0.18), rgba(7, 9, 8, 0.92));
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(720px, 100%);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 18px;
  font-size: 6rem;
  line-height: 0.96;
}

h2 {
  margin-bottom: 0;
  font-size: 2.55rem;
  line-height: 1.12;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.16rem;
  line-height: 1.25;
}

.hero-copy {
  width: min(640px, 100%);
  margin-bottom: 28px;
  color: rgba(245, 241, 232, 0.88);
  font-size: 1.18rem;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 700;
  transition:
    transform 160ms ease,
    border-color 160ms ease,
    background 160ms ease,
    color 160ms ease;
}

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

.button-primary {
  padding: 12px 20px;
  background: var(--accent);
  color: #17120a;
}

.button-primary:hover {
  background: #e7b95b;
}

.button-secondary {
  padding: 12px 18px;
  border-color: var(--line-strong);
  background: rgba(245, 241, 232, 0.06);
  color: var(--text);
}

.button-secondary:hover {
  border-color: rgba(245, 241, 232, 0.46);
  background: rgba(245, 241, 232, 0.1);
}

.signal-strip {
  position: relative;
  z-index: 2;
  justify-content: center;
  gap: 1px;
  padding: 0 44px 42px;
  background: linear-gradient(180deg, rgba(7, 9, 8, 0.94), var(--bg));
}

.signal-strip div {
  width: min(390px, 33.33%);
  min-height: 104px;
  padding: 22px;
  border-top: 1px solid var(--line);
  background: rgba(245, 241, 232, 0.04);
}

.signal-strip span {
  display: block;
  margin-bottom: 6px;
  color: var(--subtle);
  font-size: 0.88rem;
}

.signal-strip strong {
  display: block;
  color: var(--text);
  font-size: 1rem;
}

.section {
  padding: 94px 44px;
}

.section-heading,
.intro-grid,
.feature-grid,
.process-list,
.contact-section,
.site-footer {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) minmax(0, 3fr);
  gap: 44px;
  margin-bottom: 42px;
}

.section-heading .eyebrow {
  align-self: center;
  margin: 0;
  font-size: 1rem;
  text-align: center;
}

.intro {
  background: var(--bg);
}

.intro-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 34px;
  color: var(--muted);
  font-size: 1.08rem;
}

.feature-band {
  background:
    linear-gradient(180deg, rgba(13, 18, 16, 0.96), rgba(7, 9, 8, 1)),
    var(--bg-soft);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.feature-card {
  min-height: 292px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(245, 241, 232, 0.045);
}

.feature-number {
  display: inline-block;
  margin-bottom: 46px;
  color: var(--green);
  font-weight: 800;
}

.feature-card p,
.process-list p,
.contact-copy p {
  color: var(--muted);
}

.process {
  background: #090c0b;
}

.process-list {
  border-top: 1px solid var(--line);
}

.process-list article {
  display: grid;
  grid-template-columns: 72px minmax(170px, 0.34fr) minmax(0, 1fr);
  gap: 28px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
}

.process-list span {
  color: var(--accent);
  font-weight: 800;
}

.process-list h3,
.process-list p {
  margin-bottom: 0;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(360px, 0.7fr);
  gap: 64px;
  padding: 96px 44px;
}

.contact-copy h2 {
  margin-bottom: 22px;
}

.contact-copy p {
  max-width: 620px;
  margin-bottom: 28px;
}

.contact-mail {
  display: inline-flex;
  padding-bottom: 4px;
  border-bottom: 1px solid rgba(216, 163, 62, 0.55);
  color: var(--accent);
  font-weight: 700;
}

.contact-form {
  display: grid;
  gap: 16px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 24px 70px var(--shadow);
}

.contact-form label,
.contact-form .field {
  display: grid;
  gap: 7px;
}

.contact-form .field[hidden] {
  display: none;
}

.contact-form span {
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 700;
}

.method-toggle {
  display: inline-flex;
  justify-self: start;
  overflow: hidden;
  border: 1px solid rgba(245, 241, 232, 0.2);
  border-radius: 8px;
}

.method-option {
  padding: 10px 20px;
  border: 0;
  background: #090d0b;
  color: var(--muted);
  font-weight: 700;
  cursor: pointer;
  transition:
    color 160ms ease,
    background 160ms ease;
}

.method-option + .method-option {
  border-left: 1px solid rgba(245, 241, 232, 0.14);
}

.method-option:hover {
  color: var(--text);
}

.method-option[aria-pressed="true"] {
  background: rgba(216, 163, 62, 0.16);
  color: var(--accent);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  border: 1px solid rgba(245, 241, 232, 0.2);
  border-radius: 8px;
  background: #090d0b;
  color: var(--text);
  outline: none;
  padding: 12px 13px;
  resize: vertical;
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    background 160ms ease;
}

.contact-form input:focus,
.contact-form textarea:focus {
  border-color: rgba(216, 163, 62, 0.72);
  box-shadow: 0 0 0 3px rgba(216, 163, 62, 0.14);
  background: #0c120f;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: rgba(188, 195, 187, 0.54);
}

.contact-form input[aria-invalid="true"],
.contact-form textarea[aria-invalid="true"] {
  border-color: rgba(232, 122, 96, 0.75);
}

.contact-form input[aria-invalid="true"]:focus,
.contact-form textarea[aria-invalid="true"]:focus {
  border-color: rgba(232, 122, 96, 0.9);
  box-shadow: 0 0 0 3px rgba(232, 122, 96, 0.16);
}

.field-error {
  margin: 0;
  color: #ef8a72;
  font-size: 0.85rem;
  font-weight: 600;
}

.form-status {
  min-height: 24px;
  margin: 0;
  color: var(--green);
  font-size: 0.94rem;
}

.form-status.is-error {
  color: #ef8a72;
}

/* Honeypot: приховане від людей поле-пастка для ботів. */
.hp-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.site-footer {
  justify-content: space-between;
  gap: 20px;
  padding: 20px 44px;
  border-top: 1px solid var(--line);
  color: var(--subtle);
  font-size: 0.9rem;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  color: var(--text);
  font-weight: 700;
  font-size: 1rem;
}

.footer-logo img {
  width: 28px;
  height: 28px;
  object-fit: contain;
}

.footer-tagline {
  margin: 0;
  color: var(--subtle);
}

.social-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

.social-links a {
  display: inline-flex;
  color: var(--subtle);
  transition:
    color 160ms ease,
    transform 160ms ease;
}

.social-links a:hover {
  color: var(--accent);
  transform: translateY(-2px);
}

.social-links svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

@media (max-width: 980px) {
  .site-header {
    padding: 14px 22px;
  }

  .site-nav {
    display: none;
  }

  .hero {
    min-height: 82svh;
    padding: 104px 22px 58px;
  }

  h1 {
    font-size: 4.6rem;
  }

  h2 {
    font-size: 2.1rem;
  }

  .signal-strip {
    flex-direction: column;
    padding: 0 22px 34px;
  }

  .signal-strip div {
    width: 100%;
  }

  .section {
    padding: 74px 22px;
  }

  .section-heading,
  .intro-grid,
  .contact-section {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

  .process-list article {
    grid-template-columns: 58px minmax(0, 1fr);
  }

  .process-list p {
    grid-column: 2;
  }

  .contact-section {
    padding: 74px 22px;
  }
}

@media (max-width: 620px) {
  .nav-cta {
    display: none;
  }

  .brand-name {
    font-size: 1rem;
  }

  .hero {
    min-height: 80svh;
  }

  h1 {
    font-size: 3.28rem;
  }

  h2 {
    font-size: 1.72rem;
  }

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

  .button {
    width: 100%;
  }

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

  .feature-card {
    min-height: auto;
  }

  .feature-number {
    margin-bottom: 22px;
  }

  .process-list article {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .process-list p {
    grid-column: auto;
  }

  .contact-section {
    grid-template-columns: 1fr;
  }

  .contact-form {
    padding: 18px;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
    padding: 26px 22px 34px;
  }
}

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

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