/* Anviva marketing site — teal / deep slate, Russian-first */

:root {
  --ink: #1e2a3a;
  --ink-soft: #3a4a5c;
  --muted: #5c6b7a;
  --teal: #3d9b8f;
  --teal-deep: #2f7f75;
  --teal-soft: #9fd5cd;
  --mist: #e8f5f3;
  --paper: #f4f8f7;
  --line: #c5ddd9;
  --white: #ffffff;
  --max: 72rem;
  --radius: 6px;
  --font-display: "Unbounded", "Manrope", sans-serif;
  --font-body: "Manrope", "Segoe UI", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--teal-deep);
  text-underline-offset: 0.15em;
}

a:hover {
  color: var(--teal);
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 100;
  padding: 0.5rem 0.85rem;
  background: var(--ink);
  color: var(--white);
  text-decoration: none;
  border-radius: var(--radius);
}

.skip-link:focus {
  top: 1rem;
}

/* —— Atmosphere —— */
.atmosphere {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 80% 55% at 12% -10%, rgba(61, 155, 143, 0.22), transparent 55%),
    radial-gradient(ellipse 70% 50% at 100% 8%, rgba(30, 42, 58, 0.12), transparent 50%),
    radial-gradient(ellipse 60% 40% at 70% 100%, rgba(159, 213, 205, 0.35), transparent 55%),
    linear-gradient(165deg, #eef6f4 0%, #f4f8f7 42%, #e6f0ee 100%);
  animation: atmosphere-drift 18s ease-in-out infinite alternate;
}

.atmosphere::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(30, 42, 58, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 42, 58, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 70%);
}

@keyframes atmosphere-drift {
  from {
    filter: hue-rotate(0deg) saturate(1);
    transform: scale(1);
  }
  to {
    filter: hue-rotate(8deg) saturate(1.05);
    transform: scale(1.02);
  }
}

/* —— Shell —— */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.15rem 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--ink);
}

.brand__mark {
  width: 2.1rem;
  height: 2.1rem;
  flex-shrink: 0;
}

.brand__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.03em;
  line-height: 1;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.1rem;
  font-size: 0.95rem;
}

.nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-weight: 500;
}

.nav a:hover,
.nav a[aria-current="page"] {
  color: var(--teal-deep);
}

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* —— Hero (first viewport) —— */
.hero {
  min-height: calc(100svh - 4.5rem);
  display: grid;
  align-items: center;
  gap: 2rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 1.5rem 1.5rem 3rem;
}

@media (min-width: 900px) {
  .hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 2.5rem 3rem;
    padding-top: 0.5rem;
    padding-bottom: 2rem;
  }
}

.hero__copy {
  max-width: 34rem;
}

.hero__brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.2rem, 5.2vw, 3.6rem);
  letter-spacing: -0.04em;
  line-height: 1.05;
  margin: 0 0 1rem;
  color: var(--ink);
}

.hero__brand span {
  color: var(--teal);
}

.hero__headline {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.25rem, 2.4vw, 1.65rem);
  letter-spacing: -0.02em;
  line-height: 1.3;
  margin: 0 0 0.85rem;
  color: var(--ink);
}

.hero__lead {
  margin: 0 0 1.75rem;
  color: var(--muted);
  font-size: 1.05rem;
  max-width: 32rem;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.8rem 1.25rem;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.98rem;
  text-decoration: none;
  border: 1.5px solid transparent;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background: var(--teal);
  color: var(--white);
  border-color: var(--teal);
}

.btn--primary:hover {
  background: var(--teal-deep);
  border-color: var(--teal-deep);
  color: var(--white);
}

.btn--ghost {
  background: transparent;
  color: var(--ink-soft);
  border-color: var(--line);
}

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

/* Hero visual — full-bleed plane on its column */
.hero__visual {
  position: relative;
  min-height: 18rem;
  border-radius: 0;
  overflow: hidden;
  isolation: isolate;
}

@media (min-width: 900px) {
  .hero__visual {
    min-height: min(70vh, 28rem);
    margin-right: -1.5rem;
  }
}

.hero-stage {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(145deg, rgba(30, 42, 58, 0.92) 0%, rgba(47, 127, 117, 0.88) 55%, rgba(61, 155, 143, 0.75) 100%);
}

.hero-stage__grid {
  position: absolute;
  inset: 12% 8% 18% 12%;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background:
    linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 14% 18%;
  opacity: 0.9;
}

.hero-stage__sheet {
  position: absolute;
  background: rgba(244, 248, 247, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.35);
  box-shadow: 0 18px 40px rgba(16, 28, 38, 0.28);
}

.hero-stage__sheet--a {
  width: 58%;
  height: 62%;
  left: 18%;
  top: 16%;
  transform: rotate(-4deg);
  animation: sheet-float 7s ease-in-out infinite alternate;
}

.hero-stage__sheet--b {
  width: 52%;
  height: 56%;
  left: 34%;
  top: 28%;
  transform: rotate(5deg);
  background: rgba(232, 245, 243, 0.98);
  animation: sheet-float 8.5s ease-in-out infinite alternate-reverse;
}

.hero-stage__sheet-lines {
  position: absolute;
  left: 12%;
  right: 12%;
  top: 18%;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.hero-stage__sheet-lines i {
  display: block;
  height: 3px;
  background: rgba(30, 42, 58, 0.12);
  border-radius: 2px;
}

.hero-stage__sheet-lines i:nth-child(1) {
  width: 42%;
  background: var(--teal);
  opacity: 0.55;
}

.hero-stage__sheet-lines i:nth-child(2) {
  width: 88%;
}

.hero-stage__sheet-lines i:nth-child(3) {
  width: 76%;
}

.hero-stage__sheet-lines i:nth-child(4) {
  width: 92%;
}

.hero-stage__sheet-lines i:nth-child(5) {
  width: 64%;
}

@keyframes sheet-float {
  from {
    transform: translateY(0) rotate(var(--r, -4deg));
  }
  to {
    transform: translateY(-10px) rotate(calc(var(--r, -4deg) + 1.5deg));
  }
}

.hero-stage__sheet--a {
  --r: -4deg;
}

.hero-stage__sheet--b {
  --r: 5deg;
}

/* Reveal motion */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  animation: reveal-up 0.9s ease forwards;
}

.reveal--delay {
  animation-delay: 0.15s;
}

.reveal--delay-2 {
  animation-delay: 0.28s;
}

@keyframes reveal-up {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .atmosphere,
  .hero-stage__sheet--a,
  .hero-stage__sheet--b,
  .reveal {
    animation: none !important;
  }

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

/* —— Sections —— */
.section {
  padding: 4rem 0;
}

.section + .section {
  border-top: 1px solid rgba(197, 221, 217, 0.65);
}

.section__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.35rem, 2.5vw, 1.85rem);
  letter-spacing: -0.02em;
  margin: 0 0 0.65rem;
}

.section__lead {
  margin: 0 0 2rem;
  color: var(--muted);
  max-width: 36rem;
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.75rem;
}

@media (min-width: 800px) {
  .steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
  }
}

.steps li {
  position: relative;
  padding-top: 0.25rem;
}

.steps__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 0.45rem;
}

.steps h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  margin: 0 0 0.4rem;
  letter-spacing: -0.01em;
}

.steps p {
  margin: 0;
  color: var(--muted);
  font-size: 0.98rem;
}

.audience {
  display: grid;
  gap: 1rem;
  max-width: 40rem;
}

.audience p {
  margin: 0;
  color: var(--ink-soft);
}

.features {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1.25rem 2.5rem;
}

@media (min-width: 700px) {
  .features {
    grid-template-columns: 1fr 1fr;
  }
}

.features li {
  padding-left: 1rem;
  border-left: 3px solid var(--teal-soft);
}

.features strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  margin-bottom: 0.25rem;
  letter-spacing: -0.01em;
}

.features span {
  color: var(--muted);
  font-size: 0.95rem;
}

/* —— Inner pages —— */
.page-hero {
  padding: 2.5rem 0 1.5rem;
}

.page-hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.75rem, 3.5vw, 2.4rem);
  letter-spacing: -0.03em;
  margin: 0 0 0.5rem;
}

.page-hero p {
  margin: 0;
  color: var(--muted);
  max-width: 38rem;
}

.prose {
  padding: 0 0 4rem;
  max-width: 42rem;
}

.prose h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.2rem;
  letter-spacing: -0.015em;
  margin: 2rem 0 0.65rem;
}

.prose p,
.prose li {
  color: var(--ink-soft);
}

.prose ul {
  padding-left: 1.2rem;
}

.prose li + li {
  margin-top: 0.35rem;
}

.meta {
  font-size: 0.9rem;
  color: var(--muted);
}

.contact-block {
  margin: 1.5rem 0;
  padding: 1.25rem 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.contact-block a {
  font-weight: 600;
  font-size: 1.1rem;
  text-decoration: none;
}

.faq {
  margin: 0;
  padding: 0;
}

.faq dt {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.02rem;
  margin-top: 1.5rem;
  letter-spacing: -0.01em;
}

.faq dd {
  margin: 0.4rem 0 0;
  color: var(--muted);
}

/* —— Footer —— */
.site-footer {
  border-top: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.45);
  padding: 2rem 0 2.5rem;
  margin-top: 1rem;
}

.site-footer__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
  align-items: flex-start;
  justify-content: space-between;
}

.site-footer__brand {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.site-footer__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}

.site-footer__links a {
  text-decoration: none;
  color: var(--ink-soft);
  font-weight: 500;
}

.site-footer__links a:hover {
  color: var(--teal-deep);
}

.site-footer__note {
  width: 100%;
  margin: 0.5rem 0 0;
  font-size: 0.88rem;
  color: var(--muted);
}