:root {
  --bg: #f3f4ef;
  --surface: rgba(255, 255, 255, 0.88);
  --line: rgba(16, 35, 60, 0.12);
  --ink: #10233c;
  --ink-soft: #506079;
  --brand: #1d5cf2;
  --brand-strong: #0f43c9;
  --brand-soft: rgba(29, 92, 242, 0.12);
  --success: #18725a;
  --warning: #a46312;
  --shadow: 0 24px 60px rgba(16, 35, 60, 0.12);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --shell: min(1180px, calc(100vw - 32px));
  --headline: "Space Grotesk", "Segoe UI", sans-serif;
  --body: "Instrument Sans", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(29, 92, 242, 0.16), transparent 28rem),
    radial-gradient(circle at bottom right, rgba(24, 114, 90, 0.14), transparent 24rem),
    linear-gradient(180deg, #fbfbf7 0%, var(--bg) 100%);
  font-family: var(--body);
  line-height: 1.5;
}

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

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

.shell {
  width: var(--shell);
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(251, 251, 247, 0.86);
  border-bottom: 1px solid var(--line);
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 78px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-kicker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(145deg, var(--brand), var(--brand-strong));
  color: #ffffff;
  font-family: var(--headline);
  font-weight: 700;
  letter-spacing: 0.04em;
  box-shadow: 0 12px 28px rgba(29, 92, 242, 0.22);
}

.brand-copy {
  display: grid;
  gap: 2px;
}

.brand-copy strong {
  font-family: var(--headline);
  font-size: 1rem;
}

.brand-copy span {
  color: var(--ink-soft);
  font-size: 0.85rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.site-nav a {
  color: var(--ink-soft);
  font-size: 0.96rem;
  transition: color 160ms ease;
}

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

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #ffffff;
  padding: 10px 16px;
  color: var(--ink);
}

.hero {
  padding: 56px 0 42px;
}

.hero-grid,
.split-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 28px;
}

.hero-copy,
.hero-stage,
.split-copy,
.preview-stack,
.section-head,
.panel-card,
.preview-card {
  opacity: 1;
  transform: none;
  transition:
    opacity 420ms ease,
    transform 420ms ease;
}

.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--brand-strong);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1,
h2,
h3,
strong {
  font-family: var(--headline);
}

h1 {
  margin: 0;
  font-size: clamp(2.9rem, 6vw, 5.2rem);
  line-height: 0.95;
  letter-spacing: -0.05em;
}

.lede {
  max-width: 44rem;
  margin: 22px 0 0;
  color: var(--ink-soft);
  font-size: 1.12rem;
  line-height: 1.75;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 22px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease,
    border-color 160ms ease;
}

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

.button-primary {
  background: linear-gradient(145deg, var(--brand), var(--brand-strong));
  color: #ffffff;
  box-shadow: 0 18px 32px rgba(29, 92, 242, 0.24);
}

.button-secondary {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.72);
}

.signal-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.signal-chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.66);
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.signal-dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
}

.signal-dot-green {
  background: var(--success);
}

.signal-dot-blue {
  background: var(--brand);
}

.signal-dot-amber {
  background: var(--warning);
}

.hero-stage,
.preview-stack,
.doc-card,
.faq-card,
.panel-card,
.preview-card {
  border: 1px solid var(--line);
  background: var(--surface);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow);
}

.hero-stage,
.split-copy,
.preview-stack,
.doc-card {
  border-radius: var(--radius-xl);
}

.hero-stage {
  padding: 24px;
  position: relative;
  overflow: hidden;
}

.hero-stage::after,
.doc-hero::after {
  content: "";
  position: absolute;
  inset: auto -6rem -7rem auto;
  width: 16rem;
  height: 16rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(29, 92, 242, 0.18), transparent 68%);
  pointer-events: none;
}

.stage-card,
.panel-card,
.preview-card {
  border-radius: var(--radius-lg);
}

.stage-card {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.72);
  padding: 22px;
}

.stage-card-wide {
  margin-bottom: 18px;
}

.stage-head,
.preview-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.stage-label,
.preview-label,
.panel-index {
  color: var(--ink-soft);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.stage-badge {
  padding: 7px 10px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-strong);
  font-size: 0.78rem;
  font-weight: 700;
}

.stage-card h2,
.section-head h2,
.split-copy h2,
.doc-card h1 {
  margin: 12px 0 0;
  font-size: clamp(1.8rem, 3vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

.stage-list {
  margin: 18px 0 0;
  padding-left: 18px;
  color: var(--ink-soft);
}

.stage-list li + li,
.doc-list li + li {
  margin-top: 10px;
}

.stage-panel-grid,
.panel-grid,
.faq-grid,
.support-card-grid {
  display: grid;
  gap: 18px;
}

.stage-panel-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.panel-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 24px;
}

.panel-card {
  display: grid;
  gap: 12px;
  padding: 22px;
}

.panel-card h3,
.preview-card strong,
.faq-card h3 {
  margin: 0;
  font-size: 1.35rem;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.panel-card p,
.section-head p,
.split-copy p,
.preview-card p,
.doc-card p,
.faq-card p,
.doc-list,
.doc-card li {
  margin: 0;
  color: var(--ink-soft);
}

.panel-link-card {
  transition:
    transform 160ms ease,
    border-color 160ms ease;
}

.panel-link-card:hover,
.panel-link-card:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(29, 92, 242, 0.28);
}

.text-link {
  color: var(--brand-strong);
  font-weight: 700;
}

.section {
  padding: 42px 0;
}

.section-alt {
  background: linear-gradient(180deg, rgba(16, 35, 60, 0.02), rgba(16, 35, 60, 0.06));
}

.section-head {
  max-width: 52rem;
}

.split-copy {
  padding: 28px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
}

.preview-stack {
  padding: 18px;
  display: grid;
  gap: 18px;
}

.preview-card {
  padding: 20px;
}

.doc-page {
  padding: 48px 0 56px;
}

.doc-shell {
  display: grid;
  gap: 20px;
}

.doc-card {
  position: relative;
  overflow: hidden;
  padding: 30px;
}

.doc-hero {
  min-height: 15rem;
}

.doc-meta {
  margin-top: 14px;
  color: var(--ink-soft);
  font-size: 0.95rem;
}

.doc-section + .doc-section {
  margin-top: 28px;
}

.doc-section h2 {
  margin: 0 0 10px;
  font-size: 1.55rem;
  letter-spacing: -0.03em;
}

.doc-list {
  padding-left: 18px;
}

.support-card-grid,
.faq-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.faq-card,
.support-card {
  border-radius: var(--radius-lg);
  padding: 22px;
}

.support-card {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
}

.support-card strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.15rem;
}

.support-link-list {
  display: grid;
  gap: 10px;
}

.support-link-list a {
  color: var(--brand-strong);
  font-weight: 600;
}

.contribute-card {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 32px;
  align-items: center;
  padding: 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at top left, rgba(29, 92, 242, 0.18), transparent 58%),
    radial-gradient(circle at bottom right, rgba(24, 114, 90, 0.16), transparent 62%),
    rgba(255, 255, 255, 0.78);
  box-shadow: var(--shadow);
}

.contribute-copy h2 {
  margin: 12px 0 14px;
  font-family: var(--headline);
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.contribute-copy p {
  margin: 0;
  color: var(--ink-soft);
  line-height: 1.7;
}

.store-badges {
  display: grid;
  gap: 14px;
  justify-items: stretch;
}

.store-badge {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 14px 22px;
  border-radius: 18px;
  background: var(--ink);
  color: #ffffff;
  transition:
    transform 160ms ease,
    box-shadow 160ms ease;
  box-shadow: 0 14px 28px rgba(16, 35, 60, 0.22);
}

.store-badge:hover,
.store-badge:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 18px 34px rgba(16, 35, 60, 0.28);
}

.store-badge-icon {
  color: #ffffff;
  flex-shrink: 0;
}

.store-badge-copy {
  display: grid;
  line-height: 1.1;
}

.store-badge-tag {
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: rgba(255, 255, 255, 0.78);
  text-transform: uppercase;
}

.store-badge-store {
  font-family: var(--headline);
  font-weight: 700;
  font-size: 1.18rem;
  letter-spacing: -0.01em;
}

.footer {
  padding: 28px 0 40px;
  border-top: 1px solid var(--line);
}

.footer-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.brand-mark-footer .brand-copy span,
.footer-meta {
  color: var(--ink-soft);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-links a {
  color: var(--ink-soft);
}

@media (max-width: 980px) {
  .hero-grid,
  .split-grid,
  .stage-panel-grid,
  .panel-grid,
  .support-card-grid,
  .faq-grid,
  .contribute-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .topbar-inner {
    min-height: 70px;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% - 1px);
    right: 16px;
    left: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
    padding: 16px;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .hero-grid,
  .split-grid,
  .stage-panel-grid,
  .panel-grid,
  .support-card-grid,
  .faq-grid,
  .contribute-card {
    grid-template-columns: 1fr;
  }

  .contribute-card {
    padding: 28px;
  }

  .cta-row .button {
    width: 100%;
  }

  .store-badges {
    justify-items: stretch;
  }

  .store-badge {
    justify-content: center;
  }
}