:root {
  color-scheme: light;
  --ink: oklch(18% 0.035 265);
  --text: oklch(27% 0.03 260);
  --muted: oklch(43% 0.035 260);
  --line: oklch(88% 0.025 260);
  --surface: oklch(100% 0 0);
  --surface-2: oklch(97% 0.012 255);
  --surface-3: oklch(93% 0.028 255);
  --primary: oklch(55% 0.22 276);
  --primary-dark: oklch(42% 0.2 276);
  --cyan: oklch(72% 0.16 215);
  --green: oklch(67% 0.15 158);
  --warning: oklch(74% 0.16 78);
  --radius: 12px;
  --shadow: 0 8px 18px oklch(18% 0.035 265 / 0.08);
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    linear-gradient(135deg, oklch(97% 0.025 276) 0 32%, transparent 32% 100%),
    var(--surface);
  color: var(--text);
  font-family: ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px clamp(18px, 4vw, 32px);
  background: oklch(100% 0 0 / 0.9);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand img,
.footer img {
  display: block;
  width: 188px;
  height: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 30px);
  color: var(--muted);
  font-size: 0.95rem;
}

.nav a,
.header-cta {
  text-decoration: none;
}

.nav a:hover,
.nav a:focus-visible {
  color: var(--primary-dark);
}

.header-cta {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border-radius: 999px;
  background: var(--ink);
  color: white;
  font-weight: 700;
}

.hero,
.intro,
.section,
.footer {
  max-width: var(--max);
  margin: 0 auto;
  padding-inline: clamp(18px, 4vw, 32px);
}

.hero {
  min-height: calc(100vh - 78px);
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(320px, 0.96fr);
  gap: clamp(34px, 6vw, 84px);
  align-items: center;
  padding-block: clamp(52px, 9vw, 110px);
}

.signal {
  margin: 0 0 18px;
  color: var(--primary-dark);
  font-weight: 800;
}

h1,
h2,
h3,
p {
  text-wrap: pretty;
}

h1,
h2,
h3 {
  color: var(--ink);
  line-height: 1.02;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

h1 {
  max-width: 11ch;
  margin: 0;
  font-size: clamp(3.25rem, 8vw, 5.8rem);
}

h2 {
  margin: 0;
  font-size: clamp(2.1rem, 4.5vw, 4rem);
}

h3 {
  margin: 0 0 14px;
  font-size: clamp(1.35rem, 2vw, 1.75rem);
}

.hero-lead {
  max-width: 62ch;
  margin: 26px 0 0;
  font-size: clamp(1.1rem, 1.8vw, 1.35rem);
  color: var(--text);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0 22px;
  font-weight: 800;
  text-decoration: none;
}

.button.primary {
  background: var(--primary);
  color: white;
}

.button.secondary {
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--ink);
}

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

.button:focus-visible,
.header-cta:focus-visible,
summary:focus-visible {
  outline: 3px solid oklch(72% 0.16 215 / 0.65);
  outline-offset: 3px;
}

.system-map {
  position: relative;
  display: grid;
  gap: 18px;
  padding: clamp(18px, 3vw, 28px);
  background: var(--ink);
  color: white;
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.map-node,
.map-branch > div {
  border: 1px solid oklch(100% 0 0 / 0.18);
  border-radius: var(--radius);
  padding: 18px;
  background: oklch(100% 0 0 / 0.06);
}

.map-node span,
.map-branch span {
  display: block;
  margin-bottom: 5px;
  color: oklch(84% 0.08 245);
  font-size: 0.85rem;
  font-weight: 700;
}

.map-node strong,
.map-branch b {
  display: block;
  color: white;
  font-size: clamp(1.1rem, 2vw, 1.45rem);
  line-height: 1.2;
}

.map-line {
  height: 56px;
  width: 2px;
  margin-left: 28px;
  background: linear-gradient(var(--primary), var(--cyan));
}

.map-branch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.intro {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(24px, 6vw, 84px);
  align-items: start;
  padding-block: clamp(56px, 8vw, 94px);
  border-top: 1px solid var(--line);
}

.intro p {
  margin: 8px 0 0;
  max-width: 68ch;
  font-size: clamp(1.05rem, 1.6vw, 1.25rem);
}

.section {
  padding-block: clamp(66px, 9vw, 120px);
}

.section-heading {
  max-width: 760px;
  margin-bottom: clamp(28px, 5vw, 54px);
}

.capability-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 16px;
}

.capability,
.price {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(20px, 3vw, 30px);
}

.capability.large {
  grid-row: span 2;
  min-height: 330px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  background:
    linear-gradient(140deg, oklch(55% 0.22 276 / 0.16), transparent 55%),
    var(--surface-2);
}

.capability.wide {
  grid-column: 1 / -1;
}

.skill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  margin: 18px 0 0;
  list-style: none;
}

.skill-list li {
  padding: 8px 12px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--ink);
  font-weight: 700;
}

.safety {
  background: var(--ink);
  color: oklch(93% 0.02 260);
  max-width: none;
  padding-inline: max(clamp(18px, 4vw, 32px), calc((100vw - var(--max)) / 2 + 32px));
}

.safety h2,
.safety .signal {
  color: white;
}

.safety-grid {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: clamp(24px, 6vw, 72px);
}

.safety-grid p {
  margin: 0;
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  line-height: 1.45;
}

.safety-grid ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.safety-grid li {
  padding: 14px 16px;
  border: 1px solid oklch(100% 0 0 / 0.14);
  border-radius: var(--radius);
  background: oklch(100% 0 0 / 0.055);
}

.stripe-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.7fr);
  gap: clamp(30px, 6vw, 70px);
  align-items: start;
}

.stripe-flow .section-heading {
  grid-column: 1 / -1;
  margin-bottom: 0;
}

.flow-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.flow-list li {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 16px;
  align-items: start;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.flow-list span {
  color: var(--primary-dark);
  font-weight: 900;
}

.flow-list p {
  margin: 0;
}

.code-panel {
  position: sticky;
  top: 96px;
  border-radius: var(--radius);
  background: oklch(14% 0.035 265);
  color: oklch(94% 0.025 250);
  overflow: hidden;
}

.code-panel pre {
  margin: 0;
  padding: 24px;
  overflow-x: auto;
  font-size: 0.95rem;
  line-height: 1.65;
}

.price-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.price {
  display: flex;
  min-height: 300px;
  flex-direction: column;
  align-items: flex-start;
}

.price.featured {
  background: oklch(96% 0.04 276);
  border-color: oklch(78% 0.1 276);
}

.sites {
  margin: 0 0 16px;
  color: var(--primary-dark);
  font-size: 1.25rem;
  font-weight: 900;
}

.price p:not(.sites) {
  margin: 0 0 24px;
}

.price .button {
  margin-top: auto;
}

.faq-list {
  display: grid;
  gap: 10px;
  max-width: 860px;
}

details {
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}

summary {
  cursor: pointer;
  color: var(--ink);
  font-size: 1.15rem;
  font-weight: 800;
}

details p {
  max-width: 68ch;
  margin: 12px 0 0;
}

.footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding-block: 34px;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.footer p {
  max-width: 520px;
  margin: 0;
}

@media (max-width: 860px) {
  .site-header {
    position: static;
    flex-wrap: wrap;
  }

  .nav {
    order: 3;
    width: 100%;
    justify-content: space-between;
    overflow-x: auto;
  }

  .hero,
  .intro,
  .stripe-flow,
  .safety-grid {
    grid-template-columns: 1fr;
  }

  h1 {
    max-width: 12ch;
    font-size: clamp(3rem, 15vw, 4.6rem);
  }

  .capability-layout,
  .price-grid,
  .safety-grid ul {
    grid-template-columns: 1fr;
  }

  .capability.large,
  .capability.wide {
    grid-row: auto;
    grid-column: auto;
    min-height: auto;
  }

  .map-branch {
    grid-template-columns: 1fr;
  }

  .code-panel {
    position: static;
  }

  .footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }

  .button:hover {
    transform: none;
  }
}