:root {
  --page: #f3f3f5;
  --surface: #ffffff;
  --surface-alt: #dad7f7;
  --text: #00012f;
  --muted: #4a4f6a;
  --accent: #8b60ff;
  --accent-deep: #15004f;
  --accent-warm: #c33b26;
  --line: rgba(0, 1, 47, 0.1);
  --line-strong: rgba(0, 1, 47, 0.18);
  --radius: 16px;
  --radius-pill: 52px;
  --rail-width: 248px;
  --content-max: 1480px;
  --section-space: clamp(3.5rem, 6vw, 5.5rem);
  --font-display: "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-body: "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono: ui-monospace, "Cascadia Mono", Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  margin: 0;
  min-width: 0;
  overflow-x: hidden;
  font-family: var(--font-body);
  line-height: 1.62;
  background: var(--page);
  color: var(--text);
}

body.donor-layout-stendpodveska-ru {
  background:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px),
    var(--page);
  background-size: 48px 48px, 48px 48px, auto;
}

body,
button,
input,
select,
textarea {
  font: inherit;
}

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

img,
svg,
video,
canvas,
iframe {
  display: block;
  max-width: 100%;
  height: auto;
}

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

h1,
h2,
h3 {
  font-family: var(--font-display);
  letter-spacing: -0.03em;
}

h1 {
  font-size: clamp(2.25rem, 4.8vw, 4.5rem);
  line-height: 1.02;
  margin-bottom: 1.25rem;
}

h2 {
  font-size: clamp(1.85rem, 3.2vw, 3rem);
  line-height: 1.08;
  margin-bottom: 0.85rem;
}

h3 {
  font-size: clamp(1.05rem, 1.6vw, 1.35rem);
  line-height: 1.25;
}

p {
  color: var(--muted);
}

.page-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  min-height: 100vh;
}

.site-rail {
  display: none;
}

.page-main {
  min-width: 0;
}

main {
  width: min(var(--content-max), calc(100% - clamp(1.25rem, 3vw, 2.5rem)));
  margin: 0 auto;
}

.section-inner {
  width: 100%;
  margin: 0 auto;
}

.hero-visual-seed {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
  pointer-events: none;
}

.eyebrow,
.section-kicker {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 600;
  margin-bottom: 0.85rem;
  color: var(--accent);
}

.lead {
  font-size: clamp(1.05rem, 1.6vw, 1.28rem);
  max-width: 54ch;
  color: var(--text);
}

.geo-line {
  font-size: 0.82rem;
  color: var(--muted);
  font-family: var(--font-mono);
}

.button,
.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.82rem 1.35rem;
  border-radius: var(--radius-pill);
  font-weight: 700;
  border: 1px solid transparent;
  transition: transform 0.25s ease, background 0.25s ease, border-color 0.25s ease, color 0.25s ease;
}

.button-primary,
.header-cta {
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: #fff;
  border-color: var(--accent-deep);
}

.button-primary:hover,
.header-cta:hover {
  transform: translateY(-2px);
}

.button-secondary {
  background: var(--surface);
  color: var(--text);
  border-color: var(--line-strong);
}

.button-secondary:hover {
  border-color: var(--accent);
  color: var(--accent-deep);
}

.hero {
  padding: var(--section-space) 0 calc(var(--section-space) * 0.85);
}

.hero-grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: center;
}

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

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin: 1.75rem 0 1rem;
}

.hero-visual {
  position: relative;
  overflow: hidden;
  width: 100%;
  min-height: clamp(260px, 42vw, 520px);
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
  background:
    radial-gradient(circle at 18% 22%, rgba(139, 96, 255, 0.14), transparent 42%),
    linear-gradient(145deg, #ececf2, var(--surface));
}

.section {
  padding: var(--section-space) 0;
  border-top: 1px solid var(--line);
}

.section-heading {
  max-width: 72ch;
  margin-bottom: clamp(1.5rem, 3vw, 2.75rem);
}

.section-heading > p {
  font-size: 1.05rem;
}

.cards-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: 1rem;
}

.card {
  min-width: 0;
  padding: 1.35rem 1.4rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line-strong);
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--accent) 35%, transparent);
  box-shadow: 0 18px 40px rgba(0, 1, 47, 0.08);
}

.card:nth-child(1),
.card:nth-child(2) {
  grid-column: span 6;
}

.card:nth-child(3),
.card:nth-child(4) {
  grid-column: span 6;
}

.card:nth-child(5) {
  grid-column: span 12;
}

.component-services .card:nth-child(1) {
  grid-column: span 7;
}

.component-services .card:nth-child(2) {
  grid-column: span 5;
}

.component-services .card:nth-child(3) {
  grid-column: span 5;
}

.component-services .card:nth-child(4) {
  grid-column: span 7;
}

.card p {
  margin-bottom: 0;
}

.card-icon,
.step-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 1rem;
  color: var(--accent);
  border: 1px solid color-mix(in srgb, var(--accent) 28%, transparent);
  background: color-mix(in srgb, var(--accent) 8%, transparent);
  border-radius: 12px;
}

.card-icon svg,
.step-icon svg {
  width: 28px;
  height: 28px;
}

.card-label {
  display: block;
  color: var(--accent-deep);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.65rem;
}

.card-value {
  display: block;
  margin-top: 1rem;
  color: var(--accent);
  font-size: 1.08rem;
}

.card small {
  display: block;
  color: var(--muted);
  margin-top: 0.4rem;
}

.process-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--surface);
}

.process-list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  padding: 1.35rem 1.4rem;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.process-list li:last-child {
  border-bottom: 0;
}

.process-list li:nth-child(even) {
  background: color-mix(in srgb, var(--surface-alt) 35%, var(--surface));
}

.step-icon {
  margin-bottom: 0;
}

.geo-chips {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.geo-chip {
  padding: 1.25rem 1.35rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line-strong);
}

.geo-chip strong,
.geo-chip span {
  display: block;
}

.geo-chip strong {
  margin-bottom: 0.55rem;
  color: var(--text);
}

.geo-chip span {
  color: var(--muted);
  font-size: 0.92rem;
}

.component-guide {
  background: color-mix(in srgb, var(--surface-alt) 42%, var(--page));
  border-top-color: color-mix(in srgb, var(--accent) 18%, transparent);
}

.guide-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.chapter {
  padding: 1.25rem 1.35rem;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
}

.chapter li {
  color: var(--muted);
  margin: 0.5rem 0;
}

.faq-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  max-width: none;
}

.faq-list details {
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  background: var(--surface);
}

.faq-list summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--text);
}

.faq-list p {
  padding-right: 0;
  margin-bottom: 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.95fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

.contact-form {
  display: grid;
  gap: 1rem;
  background: var(--surface);
  padding: 1.5rem;
  border-radius: var(--radius);
  border: 1px solid var(--line-strong);
}

.contact-form label {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.82rem;
}

input,
select,
textarea {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--line-strong);
  background: var(--page);
  color: var(--text);
  padding: 0.85rem;
  border-radius: 10px;
}

textarea {
  min-height: 120px;
  resize: vertical;
}

.form-message {
  color: var(--accent-deep);
  margin: 0;
}

.site-footer {
  padding: calc(var(--section-space) * 0.85) 0 var(--section-space);
  background: var(--text);
  color: #fff;
  border-top: 0;
}

.site-footer p,
.site-footer a {
  color: rgba(255, 255, 255, 0.72);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 0.8fr 1fr;
  gap: 2rem;
}

.footer-brand {
  font-size: 1.45rem;
  color: #fff;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  font-size: 1.05rem;
  min-width: 0;
}

.brand-logo {
  display: block;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  overflow: hidden;
  flex: 0 0 auto;
}

.brand-logo svg {
  width: 100%;
  height: 100%;
}

.brand small {
  display: block;
  font-size: 0.68rem;
  font-weight: 500;
  color: var(--muted);
}

@media (min-width: 1100px) {
  .page-shell {
    grid-template-columns: var(--rail-width) minmax(0, 1fr);
    gap: 0;
  }

  .site-rail {
    display: flex;
    flex-direction: column;
    position: sticky;
    top: 0;
    height: 100vh;
    padding: 1.35rem 1.1rem 1.5rem;
    border-right: 1px solid var(--line-strong);
    background: color-mix(in srgb, var(--surface) 88%, var(--page));
    backdrop-filter: blur(10px);
    z-index: 40;
  }

  .rail-brand-row {
    display: flex;
    align-items: center;
    margin-bottom: 1.75rem;
  }

  .site-rail .brand-logo {
    width: 56px;
    height: 56px;
    max-width: 64px;
    max-height: 64px;
  }

  .rail-nav {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    flex: 1 1 auto;
    min-height: 0;
    overflow: auto;
  }

  .rail-nav a {
    display: flex;
    align-items: center;
    min-height: 2.5rem;
    padding: 0.55rem 0.75rem;
    border-radius: 10px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--muted);
    border: 1px solid transparent;
  }

  .rail-nav a:hover {
    color: var(--text);
    background: color-mix(in srgb, var(--accent) 8%, var(--surface));
    border-color: color-mix(in srgb, var(--accent) 16%, transparent);
  }

  .rail-cta {
    margin-top: auto;
    width: 100%;
    white-space: nowrap;
  }

  .page-main {
    padding: 0 clamp(1rem, 2.5vw, 2rem);
  }

  main {
    width: min(var(--content-max), 100%);
    margin: 0 auto;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
    gap: clamp(2rem, 4vw, 4rem);
  }

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

  .component-scenarios .cards-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .component-scenarios .card {
    grid-column: span 2;
  }

  .component-scenarios .card:nth-child(4),
  .component-scenarios .card:nth-child(5) {
    grid-column: span 3;
  }

  .component-benefits .cards-grid {
    grid-template-columns: repeat(10, minmax(0, 1fr));
  }

  .component-benefits .card {
    grid-column: span 2;
  }

  .component-benefits .card:nth-child(5) {
    grid-column: span 2;
  }
}

@media (min-width: 1440px) {
  :root {
    --rail-width: 264px;
    --content-max: 1560px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(420px, 0.88fr);
  }

  .cards-grid {
    gap: 1.15rem;
  }
}

@media (min-width: 1800px) {
  :root {
    --content-max: 1680px;
  }

  main {
    width: min(var(--content-max), calc(100% - 1rem));
  }
}

@media (max-width: 1099px) {
  .page-shell {
    display: block;
  }

  .site-rail {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.65rem 1rem;
    position: sticky;
    top: 0;
    z-index: 50;
    padding: 0.75rem clamp(1rem, 3vw, 1.5rem);
    background: color-mix(in srgb, var(--surface) 92%, var(--page));
    border-bottom: 1px solid var(--line-strong);
    backdrop-filter: blur(12px);
  }

  .rail-brand-row {
    flex: 0 0 auto;
  }

  .site-rail .brand-logo {
    width: 44px;
    height: 44px;
  }

  .rail-nav {
    display: flex;
    flex: 1 1 auto;
    flex-wrap: wrap;
    gap: 0.35rem;
    min-width: 0;
  }

  .rail-nav a {
    font-size: 0.76rem;
    padding: 0.45rem 0.65rem;
    border: 1px solid var(--line);
    border-radius: 999px;
    color: var(--muted);
    white-space: nowrap;
  }

  .rail-cta {
    flex: 0 0 auto;
    padding: 0.62rem 0.95rem;
    font-size: 0.82rem;
  }

  .page-main {
    padding-top: 0;
  }

  main {
    width: min(100% - 2rem, var(--content-max));
  }
}

@media (max-width: 900px) {
  .hero-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .cards-grid,
  .component-services .card,
  .component-scenarios .card,
  .component-benefits .card {
    grid-column: span 12 !important;
  }

  .geo-chips,
  .faq-list,
  .footer-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  main {
    width: min(100% - 1.35rem, var(--content-max));
  }

  .site-rail {
    padding-inline: 0.85rem;
  }

  .rail-nav {
    order: 3;
    width: 100%;
  }

  .rail-cta {
    margin-left: auto;
  }

  .hero-visual {
    min-height: 220px;
  }

  .card,
  .chapter,
  .contact-form {
    padding: 1.1rem;
  }
}

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

  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  .card:hover,
  .button-primary:hover,
  .header-cta:hover {
    transform: none;
  }
}