:root {
  color-scheme: light dark;
  --surface: #f4f7ff;
  --surface-raised: #ffffff;
  --surface-tint: #e8effd;
  --surface-strong: #17213b;
  --text: #17213b;
  --text-soft: #53617d;
  --line: #ced8ec;
  --accent: #2f6fce;
  --accent-hover: #245da9;
  --on-accent: #f8fbff;
  --shadow: 0 24px 70px rgb(43 72 124 / 0.16);
  --radius: 20px;
  --content: 1180px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface: #111522;
    --surface-raised: #181e2e;
    --surface-tint: #202a42;
    --surface-strong: #e9efff;
    --text: #edf2ff;
    --text-soft: #abb8d3;
    --line: #33415f;
    --accent: #76a8ef;
    --accent-hover: #9bbff2;
    --on-accent: #10182b;
    --shadow: 0 28px 80px rgb(0 0 0 / 0.34);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--surface);
  color: var(--text);
  font-family: "Aptos", "Segoe UI Variable", "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: 16px;
  z-index: 100;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--accent);
  color: var(--on-accent);
  transform: translateY(-180%);
}

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

.section-shell,
.nav-shell {
  width: min(calc(100% - 48px), var(--content));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
  background: color-mix(in srgb, var(--surface) 88%, transparent);
  backdrop-filter: blur(18px) saturate(130%);
  -webkit-backdrop-filter: blur(18px) saturate(130%);
}

.nav-shell {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 760;
  text-decoration: none;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: var(--on-accent);
  font-size: 15px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  color: var(--text-soft);
  font-size: 14px;
  font-weight: 650;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--text);
}

.hero {
  display: grid;
  min-height: calc(100dvh - 72px);
  grid-template-columns: minmax(0, 1.05fr) minmax(360px, 0.95fr);
  align-items: center;
  gap: clamp(48px, 7vw, 100px);
  padding-block: clamp(56px, 8vw, 92px);
}

.hero-copy {
  max-width: 660px;
}

.hero-label {
  width: fit-content;
  margin: 0 0 20px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 760;
  letter-spacing: 0.08em;
}

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

h1 {
  max-width: 10ch;
  margin: 0;
  font-family: "Aptos Display", "Segoe UI Variable Display", "Segoe UI", system-ui, sans-serif;
  font-size: clamp(48px, 6.6vw, 82px);
  font-weight: 780;
  letter-spacing: -0.06em;
  line-height: 0.98;
}

.hero-text {
  max-width: 30ch;
  margin: 26px 0 0;
  color: var(--text-soft);
  font-size: clamp(18px, 2vw, 22px);
  line-height: 1.55;
}

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

/* Shape system: 20px surfaces and pill controls. */
.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 720;
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 180ms ease, background-color 180ms ease, border-color 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button:active {
  transform: translateY(1px) scale(0.98);
}

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

.button-primary:hover {
  background: var(--accent-hover);
}

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

.hero-visual {
  display: grid;
  justify-items: center;
  gap: 18px;
}

.pet-stage {
  position: relative;
  display: grid;
  width: min(100%, 440px);
  aspect-ratio: 1;
  place-items: center;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 50% 42%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 46%),
    var(--surface-raised);
  box-shadow: var(--shadow);
}

.pet-stage::before {
  content: "";
  position: absolute;
  inset: 8%;
  border: 1px solid color-mix(in srgb, var(--accent) 22%, transparent);
  border-radius: 50%;
}

.pet-stage img {
  position: relative;
  width: min(64%, 260px);
  height: auto;
  image-rendering: auto;
}

.pet-caption {
  margin: 0;
  color: var(--text-soft);
  font-size: 14px;
}

.actions-section {
  padding-block: clamp(90px, 12vw, 160px);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 50px;
}

h2 {
  margin: 0;
  font-family: "Aptos Display", "Segoe UI Variable Display", "Segoe UI", system-ui, sans-serif;
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 760;
  letter-spacing: -0.045em;
  line-height: 1.04;
}

.section-heading p,
.install-copy p,
.open-copy > p {
  max-width: 56ch;
  margin: 20px 0 0;
  color: var(--text-soft);
  font-size: 18px;
}

.action-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  grid-auto-rows: minmax(280px, auto);
  gap: 16px;
}

.action-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-raised);
}

.action-card:nth-child(2),
.action-card:nth-child(7) {
  background: var(--surface-tint);
}

.action-card-feature {
  grid-column: span 2;
  grid-row: span 2;
  background: var(--surface-strong);
  color: var(--surface);
}

.action-card-wide {
  grid-column: span 2;
  flex-direction: row;
  align-items: center;
  background: color-mix(in srgb, var(--accent) 14%, var(--surface-raised));
}

.action-card-alert {
  background: color-mix(in srgb, #d86678 14%, var(--surface-raised));
}

.action-card img {
  width: min(100%, 220px);
  height: auto;
  margin: 14px auto 0;
  object-fit: contain;
}

.action-card-feature img {
  width: min(78%, 330px);
  margin-top: 36px;
}

.action-card-wide img {
  width: min(48%, 230px);
  margin: 8px 0 0 12px;
}

.action-card > div {
  padding: 20px 22px 24px;
}

.action-card h3 {
  margin: 0;
  font-size: 19px;
  letter-spacing: -0.02em;
}

.action-card p {
  margin: 6px 0 0;
  color: var(--text-soft);
  font-size: 14px;
}

.action-card-feature p {
  color: color-mix(in srgb, var(--surface) 72%, transparent);
}

.install-section {
  padding-block: clamp(80px, 10vw, 130px);
  background: var(--surface-tint);
  color: var(--text);
}

.install-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(400px, 1.1fr);
  gap: clamp(48px, 8vw, 110px);
  align-items: start;
}

.install-copy p {
  color: var(--text-soft);
}

.install-copy .button {
  margin-top: 30px;
}

.install-steps {
  display: grid;
  min-width: 0;
  gap: 16px;
}

.install-step {
  min-width: 0;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface-raised);
}

.install-step strong {
  display: block;
  margin-bottom: 10px;
}

.install-step code {
  display: block;
  max-width: 100%;
  overflow-x: auto;
  color: var(--text-soft);
  font-family: "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  font-size: 13px;
  white-space: nowrap;
}

.install-note {
  margin: 4px 0 0;
  color: var(--text-soft);
  font-size: 14px;
}

.open-section {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(50px, 8vw, 110px);
  align-items: center;
  padding-block: clamp(90px, 12vw, 160px);
}

.open-visual {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.open-visual img {
  width: 100%;
  height: auto;
}

.spec-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 28px;
  margin: 32px 0;
}

.spec-list div {
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.spec-list dt {
  color: var(--text-soft);
  font-size: 13px;
}

.spec-list dd {
  margin: 3px 0 0;
  font-size: 21px;
  font-weight: 730;
}

.text-link {
  color: var(--accent);
  font-weight: 720;
  text-underline-offset: 5px;
}

.site-footer {
  border-top: 1px solid var(--line);
}

.footer-layout {
  display: flex;
  min-height: 110px;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: var(--text-soft);
  font-size: 14px;
}

.footer-layout div {
  display: flex;
  gap: 22px;
}

.footer-layout a {
  text-underline-offset: 4px;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 620ms cubic-bezier(0.16, 1, 0.3, 1), transform 620ms cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal[data-delay="1"].is-visible {
  transition-delay: 70ms;
}

.reveal[data-delay="2"].is-visible {
  transition-delay: 140ms;
}

.asset-error {
  min-height: 180px;
  padding: 24px;
  border: 1px dashed var(--line);
  background: var(--surface-tint);
  color: var(--text-soft);
  object-fit: contain;
}

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

  .hero {
    min-height: auto;
  }

  .hero-copy {
    max-width: 720px;
  }

  h1 {
    max-width: 12ch;
  }

  .hero-visual {
    justify-self: stretch;
  }

  .pet-stage {
    width: min(100%, 560px);
  }

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

  .action-card-feature {
    grid-row: span 1;
  }

  .open-visual {
    width: min(100%, 560px);
    justify-self: center;
  }
}

@media (max-width: 767px) {
  .section-shell,
  .nav-shell {
    width: min(100% - 32px, var(--content));
  }

  .nav-shell {
    min-height: 64px;
  }

  .nav-links {
    gap: 16px;
  }

  .nav-links a:first-child {
    display: none;
  }

  .hero {
    width: 100%;
    padding: 36px 16px;
    gap: 32px;
  }

  h1 {
    font-size: clamp(44px, 14vw, 62px);
  }

  .hero-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .button {
    width: 100%;
  }

  .pet-stage {
    width: min(100%, 260px);
  }

  .pet-stage img {
    width: min(70%, 200px);
  }

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

  .action-card-feature,
  .action-card-wide {
    grid-column: span 1;
  }

  .action-card-wide {
    flex-direction: column;
    align-items: stretch;
  }

  .action-card-wide img {
    width: min(100%, 220px);
    margin: 14px auto 0;
  }

  .install-layout,
  .open-section {
    width: 100%;
    padding-inline: 16px;
  }

  .install-step code {
    white-space: normal;
    overflow-wrap: anywhere;
  }

  .spec-list {
    grid-template-columns: 1fr 1fr;
  }

  .footer-layout {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding-block: 28px;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header {
    background: var(--surface);
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
  }
}