.concept-v4 {
  --surface: #f7f5ef;
  --soft: #eef3f2;
  --card: #fffdf9;
  --input: #fff;
  --ink: #08232e;
  --muted: #50666f;
  --dark: #06384a;
  --line: #c7d9de;
  --line-strong: #668793;
  --accent: #0f6b8d;
  --accent-strong: #07516e;
  --trust: #7e5a25;
  --trust-soft: #f4ead8;
  --card-radius: 1.1rem;
  --media-radius: 0.95rem;
  --button-radius: 0.65rem;
  --brief-red: #c9282d;
  --reading-measure: 66ch;
  --card-shadow: 0 10px 28px rgb(8 35 46 / 6%);
  line-height: 1.6;
}

html[lang="he"] .concept-v4 {
  font-family: "Noto Sans Hebrew", "Segoe UI", Arial, sans-serif;
}

.concept-v4 :is(h1, h2, h3, .brand-name) {
  font-family: Georgia, "Frank Ruhl Libre", David, "Times New Roman", serif;
  overflow-wrap: normal;
  text-wrap: balance;
  word-break: normal;
}

.concept-v4 :is(p, li, figcaption) {
  overflow-wrap: normal;
  text-wrap: pretty;
  word-break: normal;
}

.concept-v4 .button {
  min-width: 10.5rem;
  min-height: 50px;
  padding-inline: 1.25rem;
  border-radius: var(--button-radius);
}

.concept-v4 .button-row {
  max-width: 34rem;
  gap: 0.75rem;
}

html[data-version="4"] {
  --anchor-offset: 6.5rem;
}

html[data-version="4"] #preview-controls {
  position: relative;
}

html[data-version="4"] .preview-panel {
  min-height: 62px;
  padding-block: 0.45rem;
}

html[data-version="4"] .preview-message {
  display: none;
}

.concept-v4 .section {
  padding-block: clamp(4.25rem, 6vw, 5.75rem);
}

.v4-header {
  border-block-end: 1px solid var(--line);
  background: rgb(255 253 249 / 96%);
  color: var(--ink);
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 28px rgb(8 35 46 / 5%);
}

.v4-header .brand-role {
  color: var(--muted);
}

.v4-header .primary-nav a {
  position: relative;
}

.v4-header .primary-nav a::after {
  position: absolute;
  inset-inline: 0;
  inset-block-end: 0.28rem;
  height: 2px;
  background: var(--accent);
  content: "";
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 160ms ease;
}

.v4-header .primary-nav a:is(:hover, :focus-visible)::after {
  transform: scaleX(1);
}

.v4-header .nav-toggle-icon {
  position: relative;
  display: block;
  height: 0.9rem;
}

.v4-header .nav-toggle-icon i {
  position: absolute;
  inset-inline: 0;
  inset-block-start: 50%;
  transition: opacity 160ms ease, transform 160ms ease;
}

.v4-header .nav-toggle-icon i:first-child {
  transform: translateY(-0.32rem);
}

.v4-header .nav-toggle-icon i:last-child {
  transform: translateY(0.32rem);
}

.v4-header .nav-toggle[aria-expanded="true"] .nav-toggle-icon i:first-child {
  transform: rotate(45deg);
}

.v4-header .nav-toggle[aria-expanded="true"] .nav-toggle-icon i:nth-child(2) {
  opacity: 0;
}

.v4-header .nav-toggle[aria-expanded="true"] .nav-toggle-icon i:last-child {
  transform: rotate(-45deg);
}

.v4-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(4rem, 6.5vw, 6.5rem);
  border-block-end: 1px solid var(--line);
  background:
    radial-gradient(circle at 18% 22%, rgb(15 107 141 / 9%), transparent 28rem),
    linear-gradient(90deg, transparent 0 66%, rgb(15 107 141 / 5%) 66% 100%),
    var(--card);
}

[dir="rtl"] .v4-hero {
  background:
    radial-gradient(circle at 82% 22%, rgb(15 107 141 / 9%), transparent 28rem),
    linear-gradient(270deg, transparent 0 66%, rgb(15 107 141 / 5%) 66% 100%),
    var(--card);
}

.v4-hero::before {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgb(15 107 141 / 5%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(15 107 141 / 5%) 1px, transparent 1px);
  background-size: 3.5rem 3.5rem;
  content: "";
  mask-image: linear-gradient(90deg, transparent 4%, #000 42%, transparent 96%);
  pointer-events: none;
}

[dir="rtl"] .v4-hero::before {
  -webkit-mask-image: linear-gradient(270deg, transparent 4%, #000 42%, transparent 96%);
  mask-image: linear-gradient(270deg, transparent 4%, #000 42%, transparent 96%);
}

.v4-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.32fr) minmax(15.5rem, 0.68fr);
  gap: clamp(2.5rem, 5vw, 4.75rem);
  align-items: center;
}

.v4-hero-copy {
  min-width: 0;
}

.v4-hero .eyebrow {
  color: var(--accent-strong);
}

.v4-hero h1 {
  max-width: 18ch;
  margin-block: 0.35rem 0.75rem;
  font-size: clamp(3.35rem, 5.7vw, 5.65rem);
  font-weight: 780;
  letter-spacing: -0.04em;
  line-height: 1;
  text-wrap: balance;
}

[dir="rtl"] .v4-hero h1 {
  letter-spacing: 0;
}

html[lang="ru"] .v4-hero h1 {
  font-size: clamp(2.85rem, 5vw, 4.8rem);
}

html[lang="en"] .v4-hero h1 {
  font-size: clamp(3.05rem, 5.25vw, 5.1rem);
}

.v4-role,
.v4-credential,
.v4-audience {
  margin: 0;
}

.v4-role {
  max-width: 34ch;
  font-size: clamp(1.3rem, 2.2vw, 1.75rem);
  font-weight: 800;
  line-height: 1.3;
  text-wrap: balance;
}

.v4-credential {
  display: inline-flex;
  max-width: 100%;
  min-height: 2.3rem;
  align-items: center;
  margin-block-start: 0.65rem;
  padding: 0.38rem 0.75rem;
  border: 1px solid rgb(126 90 37 / 28%);
  border-radius: 999px;
  background: var(--trust-soft);
  color: var(--trust);
  font-size: clamp(0.95rem, 1.5vw, 1.12rem);
  font-weight: 750;
  line-height: 1.35;
  text-align: start;
  text-wrap: balance;
}

.v4-audience {
  max-width: 58ch;
  margin-block-start: 1.5rem;
  padding-block-start: 1rem;
  border-block-start: 1px solid var(--line-strong);
  color: var(--muted);
  font-size: clamp(1rem, 1.6vw, 1.16rem);
  font-weight: 650;
}

.v4-audience-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.v4-audience-list li {
  display: inline-flex;
  min-height: 2rem;
  align-items: center;
  padding-block: 0.3rem;
  padding-inline: 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgb(255 255 255 / 72%);
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 750;
  line-height: 1.25;
  white-space: nowrap;
}

.v4-hero .button {
  --button-bg: var(--accent);
  --button-ink: #fff;
}

.v4-hero .button-secondary {
  --button-bg: transparent;
  --button-ink: var(--ink);
}

.v4-profile {
  display: grid;
  gap: 1rem;
  justify-items: center;
}

.v4-portrait-placeholder {
  display: grid;
  width: min(100%, 17rem);
  aspect-ratio: 0.88;
  place-items: center;
  align-content: center;
  gap: 0.65rem;
  overflow: hidden;
  border: 1px solid rgb(255 255 255 / 55%);
  border-radius: 1.5rem;
  background:
    radial-gradient(circle at 30% 18%, rgb(255 255 255 / 18%), transparent 28%),
    linear-gradient(145deg, rgb(6 56 74 / 22%), rgb(7 81 110 / 48%)),
    url("../assets/media/v4-hero-material-768.webp") center / cover no-repeat,
    #0a4c66;
  color: #fff;
  box-shadow: 0 18px 42px rgb(7 62 82 / 18%);
}

[dir="rtl"] .v4-portrait-placeholder {
  box-shadow: 0 18px 42px rgb(7 62 82 / 18%);
}

.v4-portrait-placeholder strong {
  display: grid;
  width: 6.25rem;
  height: 6.25rem;
  place-items: center;
  border: 1px solid rgb(255 255 255 / 55%);
  border-radius: 50%;
  background: rgb(6 56 74 / 72%);
  font-size: 2.15rem;
  letter-spacing: 0.03em;
  box-shadow: 0 8px 24px rgb(0 0 0 / 16%);
}

.v4-profile-note {
  max-width: 17rem;
  margin: 0;
  padding: 0.72rem 0.85rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: rgb(255 255 255 / 86%);
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.55;
  text-align: start;
}

.v4-section-heading {
  display: grid;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  gap: 0.7rem;
  margin-block-end: clamp(2rem, 3.5vw, 3rem);
}

.v4-section-heading > * {
  min-width: 0;
  max-width: 100%;
}

.v4-section-heading :is(h2, p) {
  margin: 0;
}

.v4-section-heading h2 {
  max-width: 28ch;
  font-size: clamp(2.2rem, 3.45vw, 3.35rem);
  line-height: 1.1;
  text-wrap: balance;
}

html[lang="ru"] .v4-section-heading h2,
html[lang="en"] .v4-methods .v4-section-heading h2 {
  font-size: clamp(1.95rem, 3.1vw, 3rem);
}

.v4-section-heading > p:last-child:not(.eyebrow) {
  max-width: var(--reading-measure);
  color: var(--muted);
  font-size: clamp(1rem, 1.4vw, 1.12rem);
  line-height: 1.7;
}

.v4-services {
  background: var(--card);
}

.v4-service-grid {
  display: grid;
  width: 100%;
  min-width: 0;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 1rem;
  align-items: stretch;
}

.v4-service-card {
  position: relative;
  display: flex;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  min-height: 12.75rem;
  grid-column: span 2;
  flex-direction: column;
  padding: clamp(1.35rem, 2.5vw, 1.8rem);
  border: 1px solid var(--line);
  border-block-start: 3px solid var(--accent);
  border-radius: var(--card-radius);
  background: var(--card);
  color: var(--ink);
  text-decoration: none;
  box-shadow: var(--card-shadow);
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.v4-service-card:nth-child(n + 4) {
  grid-column: span 3;
}

.v4-service-card:focus-within {
  border-color: var(--accent);
  box-shadow: 0 14px 32px rgb(8 35 46 / 9%);
}

.v4-service-meta {
  position: absolute;
  inset-block-start: clamp(1.35rem, 2.5vw, 1.8rem);
  inset-inline-end: clamp(1.35rem, 2.5vw, 1.8rem);
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.v4-service-icon {
  width: 2.35rem;
  height: 2.35rem;
  padding: 0.38rem;
  border: 1px solid rgb(15 107 141 / 18%);
  border-radius: 0.7rem;
  background: rgb(15 107 141 / 7%);
  color: var(--accent);
}

.v4-service-card h3 {
  max-width: 24ch;
  margin-block: 0 0.45rem;
  margin-inline: 0;
  padding-inline-end: 3.15rem;
  font-size: clamp(1.25rem, 1.8vw, 1.6rem);
  line-height: 1.25;
}

.v4-service-card p {
  max-width: 40rem;
  margin: 0;
  color: var(--muted);
  line-height: 1.62;
}

.v4-service-action {
  display: inline-flex;
  gap: 0.45rem;
  align-items: center;
  align-self: flex-start;
  min-height: 2.75rem;
  margin-block-start: auto;
  padding: 1.1rem 0.15rem 0;
  color: var(--accent-strong);
  font-size: 0.84rem;
  font-weight: 850;
  line-height: 1.35;
  text-decoration: none;
  text-wrap: balance;
}

.v4-service-action:is(:hover, :focus-visible) {
  text-decoration: underline;
  text-underline-offset: 0.25rem;
}

[dir="rtl"] .v4-service-action i {
  transform: scaleX(-1);
}

.v4-specialization {
  margin-block-start: clamp(2.5rem, 5vw, 4rem);
  padding: clamp(1.7rem, 3.5vw, 2.5rem);
  border: 0;
  border-radius: var(--card-radius);
  background:
    radial-gradient(circle at 15% 20%, rgb(255 255 255 / 12%), transparent 18rem),
    linear-gradient(135deg, var(--dark), #0b5872);
  color: #fff;
  text-align: center;
  box-shadow: 0 14px 36px rgb(6 56 74 / 14%);
}

.v4-specialization p {
  margin: 0;
  font-family: Georgia, "Frank Ruhl Libre", David, serif;
  font-size: clamp(1.65rem, 3vw, 2.65rem);
  font-weight: 850;
  line-height: 1.2;
  text-wrap: balance;
}

.v4-next-steps {
  display: grid;
  gap: 1.35rem;
  margin-block-start: 1rem;
  padding: clamp(1.4rem, 3vw, 2rem);
  border: 1px solid rgb(126 90 37 / 22%);
  border-radius: var(--card-radius);
  background: linear-gradient(145deg, var(--card), var(--trust-soft));
}

.v4-next-steps h3 {
  max-width: 28ch;
  margin: 0;
  color: var(--trust);
  font-size: clamp(1.35rem, 2.1vw, 1.75rem);
  line-height: 1.25;
}

.v4-next-steps ol {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.v4-next-steps li {
  display: grid;
  min-width: 0;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.75rem;
  align-items: start;
}

.v4-next-steps li > span {
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border-radius: 50%;
  background: var(--trust);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 900;
}

.v4-next-steps p {
  margin: 0;
  padding-block-start: 0.18rem;
  color: var(--ink);
  font-size: 0.92rem;
  line-height: 1.55;
}

.v4-videos {
  border-block: 0;
  background: var(--soft);
}

.v4-videos .video-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
}

.v4-videos .info-card {
  min-height: 0;
  overflow: hidden;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--media-radius);
  background: var(--card);
  box-shadow: var(--card-shadow);
}

.v4-videos .info-card h3 {
  margin: 0;
  padding: 0.9rem 1rem 1rem;
  font-family: inherit;
  font-size: 0.92rem;
  line-height: 1.45;
  text-align: start;
}

.v4-videos .video-frame {
  display: block;
  height: auto;
  border-radius: 0;
}

.v4-videos .video-facade {
  position: relative;
  display: grid;
  aspect-ratio: 16 / 9;
  place-items: center;
  overflow: hidden;
  isolation: isolate;
  background:
    radial-gradient(circle at 22% 25%, rgb(142 213 236 / 28%), transparent 34%),
    linear-gradient(145deg, #052d3d, #0a5873);
  color: #fff;
}

.v4-videos .video-facade::before {
  position: absolute;
  z-index: -1;
  inset: 0;
  background-image:
    linear-gradient(rgb(255 255 255 / 7%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(255 255 255 / 7%) 1px, transparent 1px);
  background-size: 2.75rem 2.75rem;
  content: "";
  mask-image: linear-gradient(135deg, #000, transparent 78%);
}

.v4-videos .video-facade-index,
.v4-videos .video-facade-privacy {
  position: absolute;
  inset-block-start: 0.85rem;
  z-index: 1;
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.04em;
}

.v4-videos .video-facade-index {
  inset-inline-start: 0.9rem;
  display: grid;
  width: 2rem;
  height: 2rem;
  place-items: center;
  border: 1px solid rgb(255 255 255 / 34%);
  border-radius: 50%;
  background: rgb(0 0 0 / 12%);
}

.v4-videos .video-facade-privacy {
  inset-inline-end: 0.9rem;
  max-width: 72%;
  padding: 0.35rem 0.55rem;
  border-radius: 999px;
  background: rgb(0 0 0 / 18%);
  color: rgb(255 255 255 / 84%);
  line-height: 1.25;
  text-align: center;
}

.v4-videos .video-facade-button {
  display: inline-flex;
  min-width: 8.5rem;
  min-height: 3.25rem;
  gap: 0.7rem;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1rem;
  border: 1px solid rgb(255 255 255 / 68%);
  border-radius: 999px;
  background: rgb(255 253 249 / 94%);
  color: var(--dark);
  font: inherit;
  font-size: 0.82rem;
  font-weight: 850;
  cursor: pointer;
  box-shadow: 0 12px 28px rgb(0 0 0 / 18%);
  transition: background-color 160ms ease, border-color 160ms ease, color 160ms ease;
}

.v4-videos .video-facade-button:is(:hover, :focus-visible) {
  border-color: #fff;
  background: #fff;
  color: var(--accent-strong);
}

.v4-videos .video-facade-button:active {
  background: var(--trust-soft);
}

.v4-videos .video-facade-play {
  width: 0;
  height: 0;
  border-top: 0.38rem solid transparent;
  border-bottom: 0.38rem solid transparent;
  border-left: 0.62rem solid currentColor;
}

.v4-consultation {
  display: grid;
  width: 100%;
  min-width: 0;
  grid-template-columns: minmax(0, 1.1fr) minmax(18rem, 0.9fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
  margin-block-start: clamp(2.5rem, 4vw, 3.5rem);
  padding: clamp(1.5rem, 3vw, 2.25rem);
  border: 1px solid var(--line);
  border-radius: var(--card-radius);
  background: rgb(255 255 255 / 88%);
  box-shadow: var(--card-shadow);
}

.v4-consultation > * {
  min-width: 0;
}

.v4-consultation .lead {
  max-width: 54ch;
  margin: 0;
  color: var(--ink);
}

.v4-consultation .claim-callout {
  align-self: stretch;
  margin: 0;
  border: 1px solid rgb(126 90 37 / 34%);
  border-radius: 0.85rem;
  background: var(--trust-soft);
}

.v4-consultation .claim-callout p {
  color: var(--trust);
  font-size: clamp(1.2rem, 2.2vw, 1.55rem);
  font-weight: 900;
}

.v4-consultation-closing {
  grid-column: 1 / -1;
  max-width: 58rem;
  margin: 0;
  padding-block-start: 1.2rem;
  border-block-start: 1px solid var(--line);
  font-size: clamp(1.08rem, 1.7vw, 1.32rem);
  font-weight: 800;
  line-height: 1.55;
}

.v4-consultation-action {
  margin-block-start: 1.25rem;
}

.v4-consultation-action .button-secondary {
  --button-bg: #fff;
  --button-ink: var(--accent-strong);
  border-color: var(--line-strong);
}

.v4-when {
  background: var(--card);
}

.v4-reason-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  align-items: stretch;
}

.v4-reason-list li {
  position: relative;
  display: grid;
  min-height: 8.5rem;
  grid-template-columns: 2.15rem minmax(0, 1fr);
  gap: 0.9rem;
  align-items: start;
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: var(--card);
  font-size: clamp(1rem, 1.45vw, 1.12rem);
  line-height: 1.58;
  box-shadow: 0 4px 14px rgb(8 35 46 / 3%);
}

.v4-reason-list li > span {
  display: grid;
  width: 2.15rem;
  height: 2.15rem;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 900;
}

.v4-reason-list p {
  margin: 0;
}

.v4-when .narrow {
  width: min(calc(100% - 2.5rem), var(--page-max));
}

.v4-section-action {
  margin-block-start: 2rem;
}

.v4-health {
  background:
    radial-gradient(circle at 10% 20%, rgb(71 176 205 / 18%), transparent 28rem),
    linear-gradient(145deg, var(--dark), #052d3d);
  color: #fff;
}

.v4-health .eyebrow {
  color: #8ed5ec;
}

.v4-health .v4-section-heading > p:last-child:not(.eyebrow),
.v4-health .v4-prose {
  color: rgb(255 255 255 / 76%);
}

.v4-health-grid {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 1.3fr) minmax(17rem, 0.7fr);
  gap: clamp(2.5rem, 5vw, 4.5rem);
  align-items: start;
}

.v4-health-grid > * {
  min-width: 0;
}

.v4-prose {
  display: grid;
  max-width: 58ch;
  gap: 0;
  font-size: clamp(1rem, 1.35vw, 1.1rem);
  line-height: 1.82;
}

.v4-prose p {
  margin: 0;
}

.v4-health .v4-prose p:first-child {
  color: #fff;
  font-size: 1.05em;
  font-weight: 700;
}

.v4-health .v4-prose p + p {
  margin-block-start: 1rem;
  padding-block-start: 1rem;
  border-block-start: 1px solid rgb(255 255 255 / 18%);
}

.v4-health .button {
  --button-bg: #fff;
  --button-ink: var(--dark);
}

.v4-health-note {
  display: grid;
  gap: 1rem;
  padding: clamp(1.5rem, 3vw, 2.25rem);
  border: 1px solid rgb(142 213 236 / 35%);
  border-radius: var(--card-radius);
  background: linear-gradient(145deg, rgb(255 255 255 / 12%), rgb(255 255 255 / 5%));
  box-shadow: 0 12px 34px rgb(0 0 0 / 10%);
}

.v4-health-note strong {
  font-family: Georgia, "Frank Ruhl Libre", David, serif;
  font-size: clamp(1.45rem, 2.5vw, 2rem);
  line-height: 1.25;
}

.v4-health-note p {
  margin: 0;
  color: rgb(255 255 255 / 68%);
  font-size: 0.85rem;
  line-height: 1.6;
}

.v4-apartments {
  background: var(--surface);
}

.v4-apartment-copy {
  display: grid;
  width: 100%;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr) minmax(18rem, 0.72fr);
  gap: clamp(1.5rem, 4vw, 4rem);
  align-items: end;
  padding: clamp(1.5rem, 3.5vw, 2.5rem);
  border: 1px solid var(--line);
  border-radius: var(--card-radius);
  background: var(--card);
  box-shadow: var(--card-shadow);
}

.v4-apartment-copy .v4-section-heading {
  margin: 0;
}

.v4-apartment-summary {
  display: grid;
  gap: 0.9rem;
  align-content: end;
}

.v4-apartment-summary .lead {
  max-width: 42ch;
  margin: 0;
}

.v4-gallery-heading {
  margin-block: clamp(2.5rem, 4.5vw, 4rem) 1.2rem;
  padding-block-end: 0.75rem;
  border-block-end: 1px solid var(--line-strong);
}

.v4-gallery-heading h3 {
  margin: 0;
  font-size: clamp(1.5rem, 2.5vw, 2rem);
}

.v4-gallery-heading p,
.v4-gallery-note {
  max-width: 62ch;
  margin: 0.45rem 0 0;
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.55;
}

.v4-gallery-note {
  margin-block: 0 1rem;
}

.v4-gallery {
  display: grid;
  width: 100%;
  min-width: 0;
  max-width: 100%;
  grid-template-columns: repeat(auto-fit, minmax(min(17rem, 100%), 1fr));
  grid-auto-flow: row;
  gap: 1rem;
  align-items: stretch;
}

.v4-gallery-figure,
.v4-media-placeholder {
  width: 100%;
  min-width: 0;
  max-width: 100%;
  min-height: 0;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--media-radius);
  background: #e7f1f3;
  box-shadow: 0 8px 22px rgb(8 35 46 / 6%);
  contain: layout paint;
}

.v4-gallery-figure img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 0;
  object-fit: cover;
}

.v4-gallery-figure figcaption {
  font-size: 0.82rem;
  text-align: start;
}

.v4-media-placeholder {
  display: grid;
  place-items: center;
  align-content: center;
  gap: 0.75rem;
  padding: 1rem;
  border-color: rgb(15 107 141 / 36%);
  border-style: dashed;
  background:
    radial-gradient(circle at 30% 20%, rgb(255 255 255 / 65%), transparent 28%),
    repeating-linear-gradient(135deg, transparent 0 17px, rgb(15 107 141 / 4%) 17px 18px),
    #e7f1f3;
  color: var(--accent-strong);
  box-shadow: none;
  text-align: center;
}

.v4-media-placeholder > span {
  display: grid;
  width: 2.5rem;
  height: 2.5rem;
  place-items: center;
  border: 1px solid rgb(15 107 141 / 45%);
  border-radius: 50%;
}

.v4-media-placeholder > span::before,
.v4-media-placeholder > span::after {
  grid-area: 1 / 1;
  width: 0.9rem;
  height: 1px;
  background: currentColor;
  content: "";
}

.v4-media-placeholder > span::after {
  transform: rotate(90deg);
}

.v4-media-placeholder small {
  max-width: 16rem;
  font-size: 0.82rem;
  font-weight: 750;
  line-height: 1.4;
}

.v4-methods {
  position: relative;
  overflow: hidden;
  background: var(--card);
}

.v4-methods::before {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgb(15 107 141 / 4%) 1px, transparent 1px),
    linear-gradient(90deg, rgb(15 107 141 / 4%) 1px, transparent 1px);
  background-size: 4rem 4rem;
  content: "";
  mask-image: linear-gradient(180deg, transparent 2%, #000 24%, transparent 78%);
  pointer-events: none;
}

.v4-methods > .container {
  position: relative;
  z-index: 1;
}

.v4-method-list {
  display: grid;
  width: 100%;
  min-width: 0;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  grid-auto-rows: 1fr;
  gap: 0.8rem;
  margin: 0;
  padding: 0;
  border-block-start: 0;
  list-style: none;
}

.v4-method-list li {
  display: grid;
  min-width: 0;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0.75rem;
  align-items: start;
  padding: 1.2rem;
  border: 1px solid var(--line);
  border-radius: 0.85rem;
  background: rgb(255 253 249 / 92%);
}

.v4-method-list li:nth-child(odd) {
  border-inline-end: 1px solid var(--line);
}

.v4-method-list span {
  display: grid;
  width: 1.85rem;
  height: 1.85rem;
  place-items: center;
  border-radius: 50%;
  background: var(--card);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 900;
}

.v4-method-list p {
  margin: 0;
  line-height: 1.62;
}

.v4-standards {
  margin-block: clamp(2rem, 4vw, 3.5rem);
  padding: clamp(1.25rem, 3vw, 2rem);
  border-inline-start: 5px solid var(--trust);
  border-radius: 0.85rem;
  background: var(--trust-soft);
}

.v4-standards p {
  max-width: var(--reading-measure);
  margin: 0;
  font-weight: 700;
  line-height: 1.65;
}

.v4-distinction {
  max-width: 58rem;
  margin: clamp(3rem, 6vw, 5rem) auto;
  padding: clamp(1.7rem, 4vw, 2.75rem);
  border: 1px solid rgb(15 107 141 / 28%);
  border-radius: var(--card-radius);
  background: linear-gradient(145deg, #f7fbfc, #eaf4f6);
  text-align: center;
  box-shadow: 0 10px 28px rgb(8 35 46 / 5%);
}

.v4-distinction > p:first-child {
  margin-block-end: 0.4rem;
  color: var(--accent-strong);
  font-weight: 850;
}

.v4-distinction h3 {
  margin-block-end: 1rem;
  font-size: clamp(1.85rem, 3.4vw, 3.15rem);
  font-weight: 900;
  line-height: 1.05;
}

.v4-distinction > p:last-child {
  max-width: 58ch;
  margin: 0;
  margin-inline: auto;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.8vw, 1.25rem);
}

.v4-contact-section {
  border-block-start: 1px solid var(--line);
  background:
    radial-gradient(circle at 15% 20%, rgb(15 107 141 / 9%), transparent 24rem),
    var(--soft);
}

.v4-contact-section .contact-intro .section-title {
  font-size: clamp(2.2rem, 3.5vw, 3.5rem);
  line-height: 1.08;
}

.v4-contact-section .whatsapp-contact-card {
  border-color: rgb(102 135 147 / 45%);
  border-radius: 1.35rem;
  box-shadow: 0 16px 42px rgb(8 35 46 / 9%);
}

.concept-v4 .whatsapp-button {
  min-width: 0;
  border-radius: 0.65rem;
}

.concept-v4 .whatsapp-button--placeholder {
  border-color: #637b85;
  background: #637b85;
}

.concept-v4 .whatsapp-button--placeholder:hover {
  background: #526a74;
}

.concept-v4 .floating-whatsapp {
  background: #12815c;
  box-shadow: 0 12px 32px rgb(4 60 42 / 34%);
}

/* Supports the optional brief-derived FAQ section without introducing a new visual system. */
:is(.v4-faq, .v4-faq-section) {
  border-block: 1px solid var(--line);
  background: var(--soft);
}

:is(.v4-faq, .v4-faq-section) :is(.faq-list, .v4-faq-list) {
  width: min(100%, 58rem);
  border-block-start: 1px solid var(--line-strong);
}

:is(.v4-faq, .v4-faq-section) :is(.faq-list, .v4-faq-list) details {
  border-block-end: 1px solid var(--line);
}

:is(.v4-faq, .v4-faq-section) :is(.faq-list, .v4-faq-list) summary {
  min-height: 4rem;
  padding-block: 1.15rem;
  color: var(--ink);
  font-size: clamp(1rem, 1.4vw, 1.12rem);
  line-height: 1.45;
  text-wrap: pretty;
}

:is(.v4-faq, .v4-faq-section) :is(.faq-list, .v4-faq-list) summary:hover {
  color: var(--accent-strong);
}

:is(.v4-faq, .v4-faq-section) :is(.faq-list, .v4-faq-list) summary:focus-visible {
  border-radius: 0.25rem;
  outline: 2px solid var(--accent);
  outline-offset: 0.25rem;
}

:is(.v4-faq, .v4-faq-section) :is(.faq-list, .v4-faq-list) details[open] summary {
  color: var(--accent-strong);
}

:is(.v4-faq, .v4-faq-section) :is(.faq-list, .v4-faq-list) details > div {
  max-width: var(--reading-measure);
  color: var(--muted);
  line-height: 1.7;
}

.concept-v4 :is(a, button) {
  scroll-margin-block-end: 4rem;
}

.concept-v4 #main-content:focus-visible {
  outline: 0;
  box-shadow: none !important;
}

.concept-v4 main :is(h1, h2, h3)[tabindex="-1"]:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 0.35rem;
  box-shadow: none !important;
}

.v4-health h2[tabindex="-1"]:focus-visible {
  outline-color: #8ed5ec;
}

@media (hover: hover) and (pointer: fine) {
  .v4-service-card:hover {
    border-color: var(--accent);
    box-shadow: 0 14px 32px rgb(8 35 46 / 9%);
    transform: translateY(-2px);
  }
}

@media (min-width: 981px) {
  html[data-version="4"] {
    --anchor-offset: 6.5rem;
  }

  .v4-header {
    position: sticky;
    inset-block-start: 0;
    z-index: 90;
  }

  .v4-header .header-inner {
    display: flex;
    width: min(calc(100% - 2.5rem), 1360px);
    grid-template-columns: none;
    gap: clamp(0.65rem, 1.5vw, 1.25rem);
    min-height: 82px;
    padding-block: 0;
  }

  .v4-header .nav-toggle {
    display: none;
  }

  .v4-header .primary-nav {
    display: block;
    width: auto;
    grid-column: auto;
    grid-row: auto;
  }

  .v4-header .primary-nav ul {
    display: flex;
    width: auto;
    max-width: none;
    grid-template-columns: none;
    gap: 0.4rem clamp(0.65rem, 1.2vw, 1.15rem);
    justify-content: flex-end;
  }

  .v4-header .primary-nav a {
    width: auto;
    padding: 0.5rem 0;
    font-size: clamp(0.75rem, 0.9vw, 0.84rem);
  }

  .v4-header .site-language-shell {
    width: auto;
    grid-column: auto;
    grid-row: auto;
    justify-self: auto;
    padding-inline-start: 0.75rem;
    border-inline-start: 1px solid rgb(127 127 127 / 28%);
  }

  .concept-v4 .contact-layout {
    grid-template-columns: minmax(17rem, 0.72fr) minmax(0, 1.28fr);
  }

  .concept-v4 .contact-intro {
    position: sticky;
    inset-block-start: 10rem;
  }

  .v4-health-note {
    position: sticky;
    inset-block-start: 7.5rem;
  }
}

@media (max-width: 980px) {
  html[data-version="4"] {
    --anchor-offset: 1.5rem;
  }

  html[data-version="4"] .preview-panel {
    grid-template-columns: minmax(0, 1fr) auto;
    min-height: 60px;
    gap: 0.6rem;
    padding-block: 0.4rem;
  }

  html[data-version="4"] .preview-copy {
    display: block;
  }

  html[data-version="4"] .preview-switchers,
  html[data-version="4"] .switcher-row {
    width: auto;
  }

  html[data-version="4"] .switcher-row {
    grid-template-columns: repeat(5, var(--control-height));
  }

  .concept-v4 .container,
  .concept-v4 .narrow,
  .v4-header .header-inner {
    width: min(calc(100% - 1.5rem), var(--page-max));
  }

  .concept-v4 .section {
    padding-block: 3.75rem;
  }

  .v4-hero {
    padding-block: 3.5rem 3.75rem;
  }

  .v4-hero h1 {
    max-width: 18ch;
    font-size: clamp(2.7rem, 8vw, 4rem);
    line-height: 1.04;
  }

  html[lang="en"] .v4-hero h1 {
    font-size: clamp(2.55rem, 7.5vw, 3.8rem);
  }

  html[lang="ru"] .v4-hero h1 {
    font-size: clamp(2.35rem, 7vw, 3.5rem);
  }

  .concept-v4 .v4-section-heading h2 {
    max-width: 28ch;
    font-size: clamp(1.8rem, 5.1vw, 2.45rem);
    line-height: 1.12;
  }

  .concept-v4 .v4-apartment-copy .v4-section-heading h2 {
    font-size: clamp(1.72rem, 4.8vw, 2.25rem);
  }

  html[lang="ru"] .concept-v4 .v4-section-heading h2 {
    font-size: clamp(1.65rem, 4.6vw, 2.2rem);
  }

  html[lang="en"] .concept-v4 .v4-methods .v4-section-heading h2,
  html[lang="ru"] .concept-v4 .v4-methods .v4-section-heading h2 {
    font-size: clamp(1.55rem, 4.15vw, 2.05rem);
  }

  .v4-hero-grid,
  .v4-health-grid,
  .v4-apartment-copy,
  .v4-service-grid,
  .v4-consultation,
  .v4-reason-list,
  .v4-method-list,
  .v4-next-steps ol,
  .concept-v4 .contact-layout,
  .concept-v4 .whatsapp-contact-card,
  .concept-v4 .footer-grid,
  .v4-videos .video-grid {
    grid-template-columns: 1fr;
  }

  .v4-profile {
    width: 100%;
    grid-template-columns: 1fr;
    justify-content: center;
    justify-items: center;
  }

  .v4-audience-list {
    gap: 0.45rem;
  }

  .v4-audience-list li {
    font-size: 0.8rem;
  }

  [dir="rtl"] .v4-profile {
    justify-content: center;
    justify-items: center;
  }

  .v4-portrait-placeholder {
    width: min(72vw, 16rem);
    min-height: 0;
    max-height: none;
    aspect-ratio: 0.88;
    margin-inline: auto;
  }

  .v4-profile-note {
    display: none;
  }

  .v4-hero-grid {
    gap: 2.75rem;
  }

  .v4-hero-copy,
  .v4-health-grid > div,
  .v4-apartment-copy > * {
    width: 100%;
  }

  .v4-apartment-copy {
    align-items: start;
    padding: 1.35rem;
  }

  .v4-hero,
  [dir="rtl"] .v4-hero {
    background:
      radial-gradient(circle at 50% 18%, rgb(15 107 141 / 9%), transparent 28rem),
      var(--card);
  }

  .v4-service-card,
  .v4-service-card:nth-child(n + 4),
  .v4-service-card:last-child {
    min-height: 0;
    grid-column: 1;
    padding: 1.1rem 1.2rem;
  }

  .v4-service-card h3 {
    margin-block: 0 0.35rem;
  }

  .v4-service-meta {
    inset-block-start: 1.1rem;
    inset-inline-end: 1.2rem;
  }

  .v4-service-card p {
    line-height: 1.5;
  }

  .v4-service-action {
    min-height: 2.25rem;
    margin-block-start: 0.45rem;
    padding-block-start: 0.35rem;
  }

  .v4-videos .video-grid {
    width: min(100%, 42rem);
    margin-inline: auto;
  }

  .v4-consultation-closing {
    grid-column: 1;
  }

  .v4-reason-list li {
    min-height: 0;
    padding-block: 1.2rem;
  }

  .v4-method-list li:nth-child(odd) {
    border-inline-end: 0;
  }

  .v4-gallery {
    width: min(100%, 42rem);
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.65rem;
    margin-inline: auto;
  }

  .v4-gallery-figure,
  .v4-media-placeholder {
    min-height: 0;
    aspect-ratio: 4 / 3;
  }

  .v4-media-placeholder {
    gap: 0.45rem;
    padding: 0.65rem;
  }

  .v4-media-placeholder > span {
    width: 1.8rem;
    height: 1.8rem;
  }

  .v4-media-placeholder small,
  .v4-gallery-figure figcaption {
    font-size: 0.8rem;
    line-height: 1.35;
  }

  .v4-consultation,
  .v4-health-note,
  .v4-apartment-copy {
    box-shadow: 0 8px 24px rgb(8 35 46 / 6%);
  }

  .v4-health-note {
    position: static;
  }

  .v4-prose {
    max-width: 100%;
  }

  .v4-method-list {
    grid-auto-rows: auto;
  }

  :is(.v4-faq, .v4-faq-section) :is(.faq-list, .v4-faq-list) {
    width: 100%;
  }

  .concept-v4 .contact-intro {
    position: static;
  }

  .concept-v4 .contact-actions {
    padding-block-start: 1.5rem;
    padding-inline-start: 0;
    border-block-start: 1px solid var(--line);
    border-inline-start: 0;
  }

  .concept-v4 .footer-grid {
    gap: 1.5rem;
  }

  .v4-header .site-language-shell,
  .v4-header .site-language-switcher {
    width: 100%;
  }

  .v4-header .site-language-switcher {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .concept-v4 .button-row {
    width: min(100%, 32rem);
    align-items: stretch;
    flex-direction: column;
  }

  .concept-v4 .button-row .button {
    width: 100%;
  }

  .concept-v4 .floating-whatsapp {
    bottom: calc(var(--floating-whatsapp-bottom, 0.75rem) + env(safe-area-inset-bottom, 0px));
    left: calc(0.75rem + env(safe-area-inset-left, 0px));
    width: 3rem;
    height: 3rem;
    padding: 0.62rem;
    box-shadow: 0 9px 24px rgb(4 60 42 / 28%);
  }

  .v4-when .narrow {
    width: min(calc(100% - 1.5rem), var(--page-max));
  }

  .concept-v4 :is(
    .v4-section-heading,
    .v4-service-card,
    .v4-next-steps,
    .v4-consultation,
    .v4-health-grid,
    .v4-apartment-copy,
    .v4-method-list,
    .v4-gallery
  ) {
    max-width: 100%;
  }
}

@media (forced-colors: active) {
  .v4-hero::before,
  .v4-methods::before,
  .v4-videos .video-facade::before {
    display: none;
  }
}

@media print {
  .v4-hero::before,
  .v4-methods::before,
  .v4-videos .video-facade::before {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .v4-service-card,
  .v4-header .primary-nav a::after,
  .v4-header .nav-toggle-icon i,
  .v4-videos .video-facade-button {
    transition: none;
  }
}