:root {
  color-scheme: light;
  --ink: #0b1d44;
  --muted: #5c6a83;
  --line: rgba(25, 94, 210, 0.16);
  --accent: #1764e8;
  --accent-soft: #8db5ff;
  --panel: rgba(255, 255, 255, 0.82);
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
  background: #f5f8ff;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at 12% 14%, rgba(141, 181, 255, 0.42), transparent 30rem),
    radial-gradient(circle at 88% 80%, rgba(23, 100, 232, 0.19), transparent 35rem),
    #f5f8ff;
}

body::before {
  position: fixed;
  inset: 0;
  pointer-events: none;
  content: "";
  opacity: 0.34;
  background-image: linear-gradient(rgba(23, 100, 232, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 100, 232, 0.055) 1px, transparent 1px);
  background-size: 42px 42px;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 20;
  padding: 0.75rem 1rem;
  color: #fff;
  text-decoration: none;
  border-radius: 0.65rem;
  background: var(--accent);
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: relative;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(72rem, calc(100% - 3rem));
  margin: 0 auto;
  padding: 1.2rem 0 0;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.site-brand img {
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 0.8rem;
  box-shadow: 0 0.65rem 1.5rem rgba(25, 74, 164, 0.16);
}

.site-header nav {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.site-header nav a {
  color: #33466a;
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
}

.site-header nav .nav-cta {
  padding: 0.65rem 0.9rem;
  color: #fff;
  border-radius: 0.75rem;
  background: var(--accent);
}

.shell {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(20rem, 0.92fr);
  align-items: center;
  gap: clamp(2rem, 6vw, 6.5rem);
  width: min(72rem, calc(100% - 3rem));
  min-height: calc(100vh - 6rem);
  margin: 0 auto;
  padding: 4rem 0 2rem;
}

.hero {
  scroll-margin-top: 2rem;
}

.card {
  min-width: 0;
}

.brand-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: clamp(2.75rem, 7vh, 5rem);
}

.app-icon {
  width: 4.25rem;
  height: 4.25rem;
  border: 1px solid rgba(23, 100, 232, 0.14);
  border-radius: 1.15rem;
  box-shadow: 0 1.15rem 3rem rgba(25, 74, 164, 0.2);
}

.maker,
.eyebrow,
.paper-label {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.17em;
}

.maker {
  color: var(--muted);
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--accent);
}

h1 {
  max-width: 12ch;
  margin: 0;
  font-size: clamp(3.35rem, 7vw, 6.8rem);
  font-weight: 600;
  line-height: 0.91;
  letter-spacing: -0.07em;
}

h1 span {
  color: var(--accent);
}

.intro {
  max-width: 34rem;
  margin: 1.7rem 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.7vw, 1.25rem);
  line-height: 1.65;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
  margin-top: 2.2rem;
}

.store-button {
  display: grid;
  min-width: 11.5rem;
  min-height: 4rem;
  align-content: center;
  padding: 0.65rem 1.15rem;
  color: var(--ink);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.72);
  transition: transform 160ms ease, border-color 160ms ease, background 160ms ease;
}

.store-button--primary {
  color: #fff;
  border-color: var(--accent);
  background: var(--accent);
}

.store-button:hover {
  transform: translateY(-2px);
  border-color: rgba(23, 100, 232, 0.38);
  background: #fff;
}

.store-button--primary:hover {
  border-color: #347cf1;
  background: #347cf1;
}

.store-button:focus-visible,
footer a:focus-visible,
.site-header a:focus-visible,
.faq-list summary:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 3px;
}

.store-kicker {
  font-size: 0.7rem;
  line-height: 1;
}

.store-button strong {
  margin-top: 0.2rem;
  font-size: 1.12rem;
}

.features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1.7rem 0 0;
  padding: 0;
  list-style: none;
}

.features li {
  padding: 0.55rem 0.8rem;
  color: #33466a;
  font-size: 0.88rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.62);
}

.sample {
  position: relative;
  padding: clamp(1.2rem, 3vw, 2.2rem);
}

.sample::before {
  position: absolute;
  inset: 8% -5% -8% 5%;
  z-index: -1;
  content: "";
  border-radius: 2.5rem;
  background: linear-gradient(145deg, rgba(141, 181, 255, 0.72), rgba(23, 100, 232, 0.26));
  filter: blur(2.4rem);
}

.paper {
  position: relative;
  min-height: 28rem;
  padding: 2.2rem;
  overflow: hidden;
  color: #0e2a61;
  border-radius: 1.5rem;
  background:
    linear-gradient(rgba(23, 100, 232, 0.09) 1px, transparent 1px),
    #fff;
  background-size: 100% 2.2rem;
  box-shadow: 0 2rem 5rem rgba(22, 68, 151, 0.24);
  transform: rotate(2.5deg);
}

.paper::after {
  position: absolute;
  right: -4rem;
  bottom: -5rem;
  width: 13rem;
  height: 13rem;
  content: "";
  border: 2.2rem solid rgba(23, 100, 232, 0.11);
  border-radius: 50%;
}

.paper-label {
  color: #667aa0;
}

.paper p {
  margin: 5.8rem 0 0;
  font-family: "Segoe Print", "Bradley Hand", "Comic Sans MS", cursive;
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  line-height: 1.08;
  transform: rotate(-3deg);
}

.underline {
  display: block;
  width: 75%;
  height: 0.55rem;
  margin: 0.25rem 0 0 1.2rem;
  border-radius: 50%;
  background: var(--accent);
  transform: rotate(-5deg) skewX(-25deg);
}

footer {
  position: relative;
  display: flex;
  justify-content: space-between;
  width: min(72rem, calc(100% - 3rem));
  margin: 0 auto;
  padding: 0 0 2rem;
  color: #6f7d94;
  font-size: 0.82rem;
}

footer a {
  color: #315da8;
  text-decoration: none;
}

.content-section,
.download-panel {
  position: relative;
  width: min(72rem, calc(100% - 3rem));
  margin: 0 auto;
}

.content-section {
  padding: clamp(4.5rem, 9vw, 7.5rem) 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 1rem;
}

.section-heading {
  max-width: 47rem;
}

.section-heading h2,
.download-panel h2 {
  margin: 0;
  font-size: clamp(2.15rem, 4.5vw, 4.2rem);
  line-height: 1;
  letter-spacing: -0.045em;
}

.section-heading > p:last-child,
.download-panel > div > p:last-child {
  max-width: 42rem;
  margin: 1.2rem 0 0;
  color: var(--muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

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

.feature-grid article,
.use-case-grid article {
  padding: 1.7rem;
  border: 1px solid var(--line);
  border-radius: 1.25rem;
  background: var(--panel);
  box-shadow: 0 1.1rem 3rem rgba(25, 74, 164, 0.07);
}

.feature-number {
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 850;
  letter-spacing: 0.12em;
}

.feature-grid h3,
.use-case-grid h3 {
  margin: 1rem 0 0.65rem;
  font-size: 1.15rem;
}

.feature-grid p,
.use-case-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
}

.steps-section {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(20rem, 1.2fr);
  gap: clamp(3rem, 8vw, 7rem);
  align-items: start;
}

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

.steps li {
  position: relative;
  display: grid;
  gap: 0.45rem;
  padding: 0 0 2.1rem 4.5rem;
  counter-increment: steps;
}

.steps li::before {
  position: absolute;
  top: -0.45rem;
  left: 0;
  display: grid;
  width: 3rem;
  height: 3rem;
  place-items: center;
  color: var(--accent);
  font-weight: 850;
  content: counter(steps, decimal-leading-zero);
  border: 1px solid var(--line);
  border-radius: 50%;
  background: #fff;
}

.steps strong {
  font-size: 1.2rem;
}

.steps span {
  color: var(--muted);
  line-height: 1.65;
}

.use-case-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 3rem;
}

.faq-list {
  display: grid;
  gap: 0.75rem;
  margin-top: 2.5rem;
}

.faq-list details {
  padding: 0 1.3rem;
  border: 1px solid var(--line);
  border-radius: 1rem;
  background: rgba(255, 255, 255, 0.72);
}

.faq-list summary {
  padding: 1.25rem 2.5rem 1.25rem 0;
  font-size: 1.05rem;
  font-weight: 800;
  cursor: pointer;
}

.faq-list p {
  max-width: 54rem;
  margin: 0;
  padding: 0 0 1.3rem;
  color: var(--muted);
  line-height: 1.65;
}

.download-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 2rem;
  align-items: center;
  margin-bottom: 5rem;
  padding: clamp(2rem, 5vw, 4rem);
  color: var(--ink);
  border: 1px solid rgba(23, 100, 232, 0.22);
  border-radius: 2rem;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(141, 181, 255, 0.24));
  box-shadow: 0 2rem 5rem rgba(22, 68, 151, 0.13);
}

.download-panel .actions {
  margin-top: 0;
}

footer > a:first-child {
  font-weight: 800;
}

@media (max-width: 780px) {
  .site-header {
    width: min(34rem, calc(100% - 2rem));
  }

  .site-header nav a:not(.nav-cta) {
    display: none;
  }

  .shell {
    grid-template-columns: 1fr;
    width: min(34rem, calc(100% - 2rem));
    padding-top: 1.5rem;
  }

  .brand-row {
    margin-bottom: 2.8rem;
  }

  h1 {
    font-size: clamp(3.2rem, 14vw, 5rem);
  }

  .actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .store-button {
    min-width: 0;
  }

  .sample {
    padding: 1rem 0 2rem;
  }

  .paper {
    min-height: 22rem;
    padding: 1.6rem;
    transform: rotate(1deg);
  }

  .paper p {
    margin-top: 4rem;
  }

  footer {
    width: min(34rem, calc(100% - 2rem));
    flex-wrap: wrap;
    gap: 1rem;
  }

  .content-section,
  .download-panel {
    width: min(34rem, calc(100% - 2rem));
  }

  .feature-grid,
  .use-case-grid {
    grid-template-columns: 1fr;
  }

  .steps-section,
  .download-panel {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 430px) {
  h1 {
    font-size: clamp(3rem, 15vw, 4rem);
  }

  .actions {
    grid-template-columns: 1fr;
  }

  .store-button {
    min-height: 4.3rem;
  }
}

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