:root {
  --bg: #0b0b0f;
  --bg-elevated: #12121a;
  --text: #f5f5f7;
  --muted: #9da3ae;
  --primary: #3461fd;
  --accent: #539df3;
  --border: rgba(83, 157, 243, 0.18);
  --glow: rgba(52, 97, 253, 0.35);
  --font-display: "Unbounded", system-ui, sans-serif;
  --font-body: "Manrope", system-ui, sans-serif;
  --max: 72rem;
  --pad: clamp(1.25rem, 4vw, 2.5rem);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 15% -10%, rgba(52, 97, 253, 0.28), transparent 55%),
    radial-gradient(ellipse 60% 40% at 90% 10%, rgba(83, 157, 243, 0.16), transparent 50%),
    radial-gradient(ellipse 50% 35% at 50% 100%, rgba(52, 97, 253, 0.12), transparent 55%),
    linear-gradient(180deg, #0d1018 0%, var(--bg) 40%, #08080c 100%);
  animation: atmosphere-shift 18s ease-in-out infinite alternate;
}

@keyframes atmosphere-shift {
  from {
    filter: hue-rotate(0deg) saturate(1);
    transform: scale(1);
  }
  to {
    filter: hue-rotate(8deg) saturate(1.08);
    transform: scale(1.03);
  }
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.25rem var(--pad);
}

.brand img {
  width: 140px;
  height: auto;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 0.35rem 1.25rem;
  font-size: 0.9375rem;
  font-weight: 500;
}

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

.nav a:hover {
  color: var(--text);
}

.nav-contact {
  color: var(--text) !important;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.03);
}

.nav-contact:hover {
  border-color: var(--accent);
  text-decoration: none;
}

.hero {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(3.5rem, 14vh, 7rem) var(--pad) clamp(4rem, 12vh, 6.5rem);
  min-height: min(88vh, 52rem);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-brand {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(2.75rem, 9vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1;
  background: linear-gradient(120deg, #fff 10%, var(--accent) 55%, var(--primary) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero h1 {
  margin: 0 0 1.25rem;
  max-width: 16ch;
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 4.2vw, 2.65rem);
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.hero-lead {
  margin: 0 0 2rem;
  max-width: 36rem;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.2rem);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1rem;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.35rem;
  border-radius: 0.65rem;
  font-family: var(--font-body);
  font-size: 0.975rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  text-decoration: none;
  transform: translateY(-1px);
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--primary), #1f46d6);
  box-shadow: 0 10px 28px var(--glow);
}

.btn-primary:hover {
  box-shadow: 0 14px 34px var(--glow);
}

.btn-ghost {
  color: var(--text);
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.03);
}

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

.hero-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(3.5rem, 8vh, 5.5rem) var(--pad);
}

.section h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.section-lead {
  margin: 0 0 2.5rem;
  color: var(--muted);
  max-width: 32rem;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem 2rem;
  counter-reset: none;
}

.steps li {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--border);
  padding-top: 1.25rem;
}

.step-num {
  display: block;
  margin-bottom: 0.85rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.steps h3 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
}

.steps p {
  margin: 0;
  color: var(--muted);
  font-size: 0.975rem;
}

.section-audience {
  position: relative;
}

.section-audience::before {
  content: "";
  position: absolute;
  left: var(--pad);
  right: var(--pad);
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

.audience-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2.5rem 3rem;
}

.audience-block h3 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
}

.audience-block p {
  margin: 0;
  color: var(--muted);
}

.requisites {
  border: 1px solid var(--border);
  border-radius: 1rem;
  background:
    linear-gradient(160deg, rgba(52, 97, 253, 0.08), transparent 40%),
    var(--bg-elevated);
  padding: clamp(1.25rem, 3vw, 2rem);
}

.requisites dl {
  margin: 0;
  display: grid;
  gap: 1rem 1.5rem;
}

.requisites dl > div {
  display: grid;
  grid-template-columns: minmax(10rem, 14rem) 1fr;
  gap: 0.35rem 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.requisites dl > div:last-child {
  padding-bottom: 0;
  border-bottom: none;
}

.requisites dt {
  margin: 0;
  color: var(--muted);
  font-size: 0.875rem;
  font-weight: 500;
}

.requisites dd {
  margin: 0;
  font-weight: 600;
  word-break: break-word;
}

.requisites a {
  color: var(--accent);
}

.footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 2.5rem var(--pad) 3rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: grid;
  gap: 1.25rem;
}

.footer-brand p {
  margin: 0.65rem 0 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-brand img {
  width: 110px;
}

.footer-contacts {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.5rem;
  font-weight: 500;
}

.footer-copy {
  margin: 0;
  color: var(--muted);
  font-size: 0.875rem;
}

.reveal {
  opacity: 0;
  transform: translateY(1.1rem);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.delay-1 { transition-delay: 0.08s; }
.reveal.delay-2 { transition-delay: 0.16s; }
.reveal.delay-3 { transition-delay: 0.24s; }
.reveal.delay-4 { transition-delay: 0.32s; }

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

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

  .audience-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .requisites dl > div {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .nav a:not(.nav-contact) {
    display: none;
  }

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

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

  .atmosphere {
    animation: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}