:root {
  color-scheme: light;
  --color-brand: #188dc8;
  --color-accent: #cd3c2b;
  --color-ink: #18313e;
  --color-muted: #536773;
  --color-link: #106b9b;
  --color-canvas: #f1f6f9;
  --color-surface: #ffffff;
  --color-border: #d9e4ea;
  --content-width: 72rem;
  --reading-width: 48rem;
  font-family: "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-synthesis: none;
  text-size-adjust: 100%;
  -webkit-text-size-adjust: 100%;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--color-ink);
  background: var(--color-surface);
  font-size: 1rem;
  line-height: 1.85;
  overflow-wrap: anywhere;
}

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

a {
  color: inherit;
  text-underline-offset: 0.25em;
}

a:hover {
  text-decoration-thickness: 0.12em;
}

:focus-visible {
  outline: 3px solid var(--color-link);
  outline-offset: 5px;
}

h1,
h2,
h3,
p,
figure {
  margin: 0;
}

h1,
h2,
h3 {
  line-height: 1.5;
  overflow-wrap: normal;
}

h1,
h2 {
  letter-spacing: -0.035em;
}

ul,
ol {
  margin: 0;
  padding-left: 1.5rem;
}

html {
  scroll-padding-top: 7rem;
}

.container {
  width: min(var(--content-width), calc(100% - 3rem));
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  z-index: 20;
  top: 0.75rem;
  left: 1rem;
  padding: 0.65rem 1rem;
  color: var(--color-surface);
  background: var(--color-ink);
  transform: translateY(-180%);
}

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

.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.header-inner {
  display: flex;
  min-height: 5.5rem;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.brand {
  display: inline-flex;
  flex-shrink: 0;
  align-items: center;
  gap: 0.65rem;
  margin-block: -0.375rem;
  padding-block: 0.375rem;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.035em;
  text-decoration: none;
}

.brand img {
  width: 2.5rem;
  height: 2.5rem;
}

.main-navigation {
  display: flex;
  align-items: center;
  gap: 1.6rem;
}

.main-navigation > a:not(.button) {
  padding-block: 0.7rem;
  font-size: 0.9375rem;
  text-decoration: none;
}

.main-navigation > a:not(.button):hover {
  color: var(--color-link);
  text-decoration: underline;
}

.button {
  display: inline-flex;
  min-height: 3.25rem;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  border: 2px solid transparent;
  border-radius: 0.75rem;
  padding: 0.8rem 1.25rem;
  color: var(--color-surface);
  background: var(--color-brand);
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.4;
  text-decoration: none;
}

.button:hover {
  border-color: var(--color-link);
}

.button--light {
  color: var(--color-link);
  background: var(--color-surface);
}

.eyebrow {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  margin-bottom: 1.25rem;
  color: var(--color-muted);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.075em;
}

.eyebrow::before {
  width: 1.75rem;
  height: 0.2rem;
  background: var(--color-brand);
  content: "";
}

.hero {
  padding-block: 3.5rem 4.5rem;
  background: var(--color-canvas);
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  align-items: center;
  gap: 2.75rem;
}

.hero-heading {
  margin-bottom: 1.6rem;
  font-size: clamp(2rem, 3vw, 2.65rem);
  font-weight: 700;
  line-height: 1.65;
}

.hero-heading span {
  display: block;
}

.hero-description {
  max-width: 29rem;
  color: var(--color-muted);
  font-size: 1.0625rem;
}

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

.availability-note {
  margin-top: 0.8rem;
  color: var(--color-muted);
  font-size: 0.875rem;
}

.hero-visual {
  position: relative;
  min-height: 34rem;
}

.scene-photo {
  width: 100%;
  border-radius: 1.5rem;
}

.hero-visual .scene-photo {
  position: absolute;
  top: 2.5rem;
  right: 0;
}

.device {
  width: 12rem;
  border: 0.4rem solid var(--color-ink);
  border-radius: 1.9rem;
  background: var(--color-ink);
  box-shadow: 0 1.25rem 2.5rem rgb(24 49 62 / 15%);
  overflow: hidden;
}

.device img {
  width: 100%;
}

.hero-visual .device {
  position: relative;
  margin-top: 8rem;
  margin-left: 0.5rem;
}

.image-note {
  margin-top: 2rem;
  color: var(--color-muted);
  font-size: 0.8125rem;
  text-align: center;
}

.section {
  padding-block: 5rem;
}

.section--tinted {
  background: var(--color-canvas);
}

.section-heading {
  margin-bottom: 3.5rem;
  font-size: clamp(1.8rem, 3vw, 2.25rem);
  text-align: center;
}

.feature-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  align-items: center;
  gap: 5rem;
}

.feature-copy h2,
.feature-copy h3 {
  margin-bottom: 1.25rem;
  font-size: clamp(1.65rem, 2.5vw, 2.1rem);
}

.feature-copy > p:not(.eyebrow) {
  color: var(--color-muted);
}

.feature-points {
  display: grid;
  gap: 1.4rem;
  margin-top: 2rem;
  padding: 0;
  list-style: none;
}

.feature-points li {
  border-left: 3px solid var(--color-brand);
  padding-left: 1.1rem;
}

.feature-points strong {
  display: block;
  margin-bottom: 0.3rem;
  font-size: 1.0625rem;
}

.feature-points p {
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.feature-visual .device {
  position: relative;
  width: 10.75rem;
  margin-top: -8rem;
  margin-right: 1rem;
  margin-left: auto;
}

.feature-visual--reception {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 10.75rem;
  align-items: center;
  gap: 1rem;
}

.feature-visual--reception .device {
  margin: 0;
}

.feature-layout--reverse .feature-copy {
  grid-column: 1;
  grid-row: 1;
}

.feature-layout--reverse .feature-visual {
  grid-column: 2;
  grid-row: 1;
}

.steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2.5rem;
  padding: 0;
  list-style: none;
  counter-reset: start-steps;
}

.steps li {
  counter-increment: start-steps;
}

.steps li::before {
  display: inline-flex;
  width: 3rem;
  height: 3rem;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  color: var(--color-link);
  background: var(--color-surface);
  font-size: 1.1rem;
  font-weight: 700;
  content: counter(start-steps, decimal-leading-zero);
  content: counter(start-steps, decimal-leading-zero) / "";
}

.steps h3 {
  margin-bottom: 0.75rem;
  font-size: 1.2rem;
}

.steps p {
  color: var(--color-muted);
  font-size: 0.9375rem;
}

.faq-list {
  max-width: var(--reading-width);
  margin-inline: auto;
  border-top: 1px solid var(--color-border);
}

.faq-list details {
  border-bottom: 1px solid var(--color-border);
}

.faq-list summary {
  position: relative;
  min-height: 4.5rem;
  padding: 1.3rem 3rem 1.3rem 0;
  font-weight: 700;
  line-height: 1.75;
  cursor: pointer;
  list-style: none;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  position: absolute;
  top: 1.3rem;
  right: 0.5rem;
  color: var(--color-link);
  font-size: 1.5rem;
  font-weight: 400;
  line-height: 1.75rem;
  content: "+";
  content: "+" / "";
}

.faq-list details[open] summary::after {
  content: "−";
  content: "−" / "";
}

.faq-list details p {
  padding: 0 2rem 1.5rem 0;
  color: var(--color-muted);
}

.download-section {
  padding-block: 4.5rem;
  color: var(--color-surface);
  background: var(--color-brand);
  text-align: center;
}

.download-section h2 {
  font-size: clamp(1.8rem, 3vw, 2.35rem);
}

.download-section > .container > p {
  margin-top: 1rem;
  font-size: 1.25rem;
  font-weight: 700;
}

.download-section :focus-visible {
  outline-color: var(--color-surface);
}

.store-list {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  margin-top: 2rem;
  padding: 0;
  list-style: none;
}

.store-list a {
  display: block;
}

.store-badge-app-store {
  width: auto;
  height: 3rem;
}

.store-badge-google-play {
  width: auto;
  height: 3.938rem;
}

.site-footer {
  padding-block: 3rem 2rem;
  border-top: 1px solid var(--color-border);
}

.footer-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.75rem 1.5rem;
  padding: 0;
  list-style: none;
  font-size: 0.875rem;
}

.footer-links a {
  display: inline-block;
  margin-block: -0.125rem;
  padding-block: 0.625rem;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 2rem;
  color: var(--color-muted);
  font-size: 0.8125rem;
}

.footer-bottom a,
.breadcrumb a,
.legal-return a {
  display: inline-block;
  margin-block: -0.625rem;
  padding-block: 0.625rem;
}

.legal-main {
  width: min(var(--reading-width), calc(100% - 3rem));
  margin-inline: auto;
  padding-block: 3rem 5rem;
}

.breadcrumb {
  margin-bottom: 2rem;
  color: var(--color-muted);
  font-size: 0.875rem;
}

.breadcrumb a,
.legal-content a {
  color: var(--color-link);
}

.legal-title {
  margin-bottom: 1rem;
  font-size: clamp(1.65rem, 4vw, 2.4rem);
}

.legal-date {
  margin-bottom: 1.5rem;
  color: var(--color-muted);
  font-size: 0.875rem;
}

.legal-content > p {
  margin-bottom: 1.5rem;
}

.legal-content section + section {
  margin-top: 2.75rem;
}

.legal-content h2 {
  margin-bottom: 1rem;
  font-size: 1.2rem;
  letter-spacing: 0;
}

.legal-content p + p,
.legal-content p + ul,
.legal-content p + ol,
.legal-content ul + p,
.legal-content ol + p {
  margin-top: 0.8rem;
}

.legal-content li + li {
  margin-top: 0.5rem;
}

.legal-content .mail-address {
  display: inline;
  vertical-align: -0.12em;
}

.legal-table {
  margin: 1.25rem 0 0;
  border-top: 1px solid var(--color-border);
}

.legal-table > div {
  display: grid;
  grid-template-columns: 12rem minmax(0, 1fr);
  gap: 1.5rem;
  border-bottom: 1px solid var(--color-border);
  padding-block: 1.2rem;
}

.legal-table dt {
  font-weight: 700;
}

.legal-table dd {
  margin: 0;
}

.legal-return {
  margin-top: 3rem;
}

.legal-content .store-list {
  justify-content: flex-start;
  margin-top: 1rem;
}

.legal-content .store-list li + li {
  margin-top: 0;
}

@media (max-width: 63.99rem) {
  .header-inner {
    gap: 1rem;
  }

  .main-navigation {
    gap: 1rem;
  }

  .main-navigation > a:not(.button) {
    display: none;
  }

  .hero-layout {
    gap: 1.5rem;
  }

  .hero-visual {
    min-height: 30rem;
  }

  .hero-visual .device {
    width: 10.5rem;
  }

  .feature-layout {
    gap: 2.5rem;
  }

  .feature-visual--reception {
    display: block;
  }

  .feature-visual--reception .device {
    margin: 1.5rem auto 0;
  }

  .footer-top {
    display: block;
  }

  .footer-links {
    justify-content: flex-start;
    margin-top: 1.5rem;
  }
}

@media (max-width: 47.99rem) {
  .container,
  .legal-main {
    width: calc(100% - 2.5rem);
  }

  .header-inner {
    min-height: 4.5rem;
  }

  .brand {
    gap: 0.5rem;
    font-size: 1.125rem;
  }

  .brand img {
    width: 2rem;
    height: 2rem;
  }

  .main-navigation .button {
    min-height: 2.75rem;
    padding: 0.6rem 0.7rem;
    font-size: 1.25rem;
  }

  .hero {
    padding-block: 2.5rem 3rem;
  }

  .hero-layout,
  .feature-layout {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 2.25rem;
  }

  .hero-heading {
    font-size: min(2rem, calc((100vw - 2.5rem) / 12.5));
  }

  .hero-description {
    font-size: min(1rem, calc((100vw - 2.5rem) / 23.5));
  }

  .hero-visual {
    min-height: 0;
  }

  .hero-visual .scene-photo {
    position: static;
  }

  .hero-visual .device,
  .feature-visual .device {
    width: 14rem;
    max-width: 75%;
    margin: 1.5rem auto 0;
  }

  .scene-photo {
    border-radius: 1rem;
  }

  .section {
    padding-block: 3.5rem;
  }

  .section-heading {
    margin-bottom: 2.5rem;
    font-size: 1.75rem;
  }

  .feature-copy {
    order: -1;
  }

  .feature-copy h2,
  .feature-copy h3 {
    font-size: 1.65rem;
  }

  .feature-points {
    gap: 1.25rem;
    margin-top: 1.5rem;
  }

  .steps {
    grid-template-columns: minmax(0, 1fr);
    gap: 2rem;
  }

  .faq-list summary {
    padding-right: 2rem;
  }

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

  .download-section {
    padding-block: 3.5rem;
  }

  .download-section > .container > p {
    font-size: 1.1875rem;
  }

  .site-footer {
    padding-block: 2.5rem 2rem;
  }

  .footer-links {
    display: block;
  }

  .footer-links li + li {
    margin-top: 0.2rem;
  }

  .footer-bottom {
    display: block;
    margin-top: 1.5rem;
  }

  .footer-bottom p + p {
    margin-top: 0.5rem;
  }

  .legal-main {
    padding-block: 2rem 3.5rem;
  }

  .legal-table > div {
    grid-template-columns: minmax(0, 1fr);
    gap: 0.5rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto;
  }
}