:root {
  color: #102b33;
  background: #fffdf8;
  font-family: "Noto Sans JP", sans-serif;
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  --ink: #102b33;
  --muted: #52666a;
  --line: #d9e1df;
  --paper: #fffdf8;
  --teal: #087d7e;
  --coral: #f24f57;
  --gold: #e3a300;
  --max: 1320px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

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

.page-width {
  width: min(calc(100% - 64px), var(--max));
  margin-inline: auto;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 248, 0.9);
  backdrop-filter: blur(14px);
}

.header-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-family: "BIZ UDPGothic", sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.035em;
}

.header-inner nav,
.footer-inner div {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 22px;
  color: #29464d;
  font-size: 0.84rem;
  font-weight: 700;
}

.header-inner nav a,
.footer-inner a {
  text-decoration: underline;
  text-decoration-color: rgba(16, 43, 51, 0.26);
  text-underline-offset: 0.28em;
}

.header-inner nav a:hover,
.header-inner nav a:focus-visible,
.footer-inner a:hover,
.footer-inner a:focus-visible {
  color: var(--teal);
  text-decoration-color: currentColor;
}

.hero {
  min-height: 310px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.8fr);
  align-items: center;
  gap: 64px;
  padding-block: 52px 56px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--teal);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.hero h1 {
  max-width: 680px;
  margin: 0;
  font-family: "BIZ UDPGothic", sans-serif;
  font-size: clamp(2.4rem, 4.4vw, 3.8rem);
  line-height: 1.16;
  letter-spacing: -0.055em;
  white-space: nowrap;
}

.hero-copy > p:last-child {
  max-width: 570px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 1rem;
  font-weight: 500;
}

.hero-mark {
  justify-self: center;
  text-align: center;
}

.hero-icons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 16px;
}

.hero-icons img {
  width: 74px;
  height: 74px;
  border-radius: 16px;
  object-fit: cover;
  box-shadow: 0 10px 30px rgba(16, 43, 51, 0.08);
}

.hero-mark strong,
.hero-mark span {
  display: block;
}

.hero-mark strong {
  font-family: "BIZ UDPGothic", sans-serif;
  font-size: 1.8rem;
  letter-spacing: -0.04em;
}

.hero-mark span {
  margin-top: 6px;
  color: #879295;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.2em;
}

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

.product-stage {
  --tone: var(--teal);
  --tone-soft: #e4f2f0;
  display: grid;
  grid-template-columns: minmax(320px, 0.82fr) minmax(0, 1.18fr);
  grid-template-areas: "copy media";
  align-items: center;
  gap: clamp(48px, 7vw, 108px);
  min-height: 610px;
  padding-block: 68px;
  border-bottom: 1px solid var(--line);
}

.product-stage.is-reverse {
  grid-template-columns: minmax(0, 1.18fr) minmax(320px, 0.82fr);
  grid-template-areas: "media copy";
}

.product-stage--visual {
  --tone: var(--coral);
  --tone-soft: #fde9e8;
}

.product-stage--vocab .product-cta {
  background: var(--coral);
}

.product-stage--sentence {
  --tone: var(--gold);
  --tone-soft: #fff2cf;
}

.product-copy {
  grid-area: copy;
}

.product-media {
  grid-area: media;
  display: grid;
  place-items: center;
  min-width: 0;
  padding: clamp(14px, 2.4vw, 28px);
  border: 1px solid rgba(16, 43, 51, 0.1);
  border-radius: 18px;
  background: var(--tone-soft);
  box-shadow: 0 20px 55px rgba(16, 43, 51, 0.1);
}

.product-media img {
  width: 100%;
  max-height: 500px;
  border-radius: 13px;
  object-fit: contain;
  background: white;
}

.product-index {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-bottom: 22px;
}

.product-number {
  color: var(--tone);
  font-family: "BIZ UDPGothic", sans-serif;
  font-size: clamp(3.3rem, 5.2vw, 5rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.07em;
}

.product-kind {
  padding: 7px 14px;
  border-radius: 999px;
  color: var(--tone);
  background: var(--tone-soft);
  font-size: 0.74rem;
  font-weight: 800;
}

.product-heading {
  display: flex;
  align-items: center;
  gap: 14px;
}

.product-heading img {
  display: none;
  width: 52px;
  height: 52px;
  flex: 0 0 auto;
  border-radius: 12px;
  object-fit: cover;
}

.product-copy h2 {
  margin: 0;
  font-family: "BIZ UDPGothic", sans-serif;
  font-size: clamp(1.85rem, 2.65vw, 2.65rem);
  line-height: 1.3;
  letter-spacing: -0.05em;
}

.product-summary {
  max-width: 530px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.85;
}

.feature-list {
  display: grid;
  gap: 12px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  display: grid;
  grid-template-columns: 18px minmax(0, 1fr);
  align-items: start;
  gap: 11px;
  color: #344f55;
  font-size: 0.9rem;
  line-height: 1.65;
}

.feature-list i {
  margin-top: 0.35em;
  color: var(--tone);
  font-size: 0.78rem;
}

.product-cta {
  width: fit-content;
  min-width: 190px;
  min-height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin-top: 32px;
  padding: 0 24px;
  border-radius: 8px;
  color: white;
  background: var(--tone);
  box-shadow: 0 10px 24px color-mix(in srgb, var(--tone) 20%, transparent);
  font-weight: 800;
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.product-cta:hover,
.product-cta:focus-visible {
  transform: translateY(-3px);
  box-shadow: 0 15px 30px color-mix(in srgb, var(--tone) 28%, transparent);
  outline: none;
}

.support {
  padding: 64px 0 58px;
  background: #f5f7f3;
}

.support-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 34px;
}

.support-heading .eyebrow {
  margin: 0;
}

.support-heading h2 {
  margin: 0;
  font-family: "BIZ UDPGothic", sans-serif;
  font-size: clamp(1.35rem, 2.2vw, 2rem);
  letter-spacing: -0.04em;
}

.support-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid #cfd8d5;
  border-bottom: 1px solid #cfd8d5;
}

.support-item {
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  padding: 28px 25px 30px;
  border-right: 1px solid #cfd8d5;
}

.support-item:first-child {
  padding-left: 0;
}

.support-item:last-child {
  padding-right: 0;
  border-right: 0;
}

.support-item > i {
  min-height: 34px;
  color: var(--teal);
  font-size: 1.85rem;
}

.support-item:nth-child(1) > i {
  color: #e62217;
}

.support-item:nth-child(2) > i {
  color: #1a8fd2;
}

.support-item:nth-child(3) > i {
  color: #5865f2;
}

.support-item:nth-child(5) > i {
  color: var(--gold);
}

.support-eyebrow {
  margin-top: 14px;
  color: #718083;
  font-size: 0.64rem;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.support-item h3 {
  min-height: 2.8em;
  margin: 4px 0 0;
  font-size: 1.02rem;
  line-height: 1.4;
}

.support-item p {
  margin: 11px 0 22px;
  color: var(--muted);
  font-size: 0.78rem;
  line-height: 1.7;
}

.support-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
  margin-top: auto;
}

.support-links a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #214148;
  font-size: 0.76rem;
  font-weight: 800;
  text-decoration: underline;
  text-decoration-color: rgba(33, 65, 72, 0.25);
  text-underline-offset: 0.3em;
}

.support-links a:hover,
.support-links a:focus-visible {
  color: var(--teal);
  text-decoration-color: currentColor;
  outline: none;
}

.site-footer {
  padding-block: 28px;
  background: var(--paper);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  color: #607276;
  font-size: 0.75rem;
}

@media (prefers-reduced-motion: no-preference) {
  .hero-copy,
  .hero-mark,
  .product-copy,
  .product-media {
    animation: reveal 600ms both;
  }

  .hero-mark,
  .product-media {
    animation-delay: 100ms;
  }

  @keyframes reveal {
    from {
      opacity: 0;
      transform: translateY(16px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
}

@media (max-width: 1040px) {
  .hero {
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 32px;
  }

  .product-stage,
  .product-stage.is-reverse {
    grid-template-columns: minmax(280px, 0.9fr) minmax(0, 1.1fr);
    gap: 42px;
  }

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

  .support-item,
  .support-item:first-child,
  .support-item:last-child {
    padding: 24px;
    border-right: 1px solid #cfd8d5;
    border-bottom: 1px solid #cfd8d5;
  }

  .support-item:nth-child(3n) {
    border-right: 0;
  }

  .support-item:nth-child(n + 4) {
    border-bottom: 0;
  }
}

@media (max-width: 760px) {
  .page-width {
    width: min(calc(100% - 32px), var(--max));
  }

  .header-inner {
    min-height: 62px;
  }

  .header-inner nav {
    gap: 12px;
    font-size: 0.7rem;
  }

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

  .hero {
    min-height: unset;
    grid-template-columns: 1fr;
    gap: 40px;
    padding-block: 38px 42px;
  }

  .hero h1 {
    font-size: clamp(1.9rem, 8.3vw, 3rem);
  }

  .hero-copy > p:last-child {
    margin-top: 20px;
    font-size: 0.92rem;
  }

  .hero-mark {
    justify-self: start;
    display: grid;
    grid-template-columns: auto 1fr;
    align-items: center;
    column-gap: 16px;
    text-align: left;
  }

  .hero-icons {
    grid-row: 1 / span 2;
    margin: 0;
    gap: 7px;
  }

  .hero-icons img {
    width: 46px;
    height: 46px;
    border-radius: 10px;
  }

  .hero-mark strong {
    font-size: 1.3rem;
  }

  .hero-mark span {
    margin: 3px 0 0;
    font-size: 0.56rem;
  }

  .product-stage,
  .product-stage.is-reverse {
    grid-template-columns: 1fr;
    grid-template-areas:
      "copy"
      "media";
    gap: 34px;
    min-height: unset;
    padding-block: 50px;
  }

  .product-index {
    gap: 14px;
    margin-bottom: 20px;
  }

  .product-number {
    font-size: 3.35rem;
  }

  .product-heading img {
    display: block;
  }

  .product-copy h2 {
    font-size: clamp(1.55rem, 7.5vw, 2.15rem);
  }

  .product-summary {
    margin-top: 17px;
    font-size: 0.9rem;
  }

  .feature-list {
    gap: 10px;
    margin-top: 21px;
  }

  .feature-list li {
    font-size: 0.84rem;
  }

  .product-cta {
    width: 100%;
    margin-top: 27px;
  }

  .product-media {
    padding: 11px;
    border-radius: 14px;
  }

  .product-media img {
    border-radius: 9px;
  }

  .support {
    padding: 48px 0 42px;
  }

  .support-heading {
    display: block;
    margin-bottom: 24px;
  }

  .support-heading .eyebrow {
    margin-bottom: 8px;
  }

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

  .support-item,
  .support-item:first-child,
  .support-item:last-child {
    padding: 22px 16px 24px;
  }

  .support-item:nth-child(3n) {
    border-right: 1px solid #cfd8d5;
  }

  .support-item:nth-child(even) {
    border-right: 0;
  }

  .support-item:nth-child(n + 4) {
    border-bottom: 1px solid #cfd8d5;
  }

  .support-item:last-child {
    grid-column: 1 / -1;
    border-right: 0;
    border-bottom: 0;
  }

  .support-item h3 {
    min-height: 0;
  }

  .footer-inner {
    display: grid;
  }

  .footer-inner div {
    gap: 12px;
    font-size: 0.7rem;
  }
}

@media (max-width: 380px) {
  .page-width {
    width: min(calc(100% - 24px), var(--max));
  }

  .brand {
    font-size: 1.05rem;
  }

  .header-inner nav {
    max-width: 142px;
    text-align: right;
  }

  .hero h1 {
    font-size: 1.72rem;
  }

  .hero-icons img {
    width: 39px;
    height: 39px;
  }

  .hero-mark strong {
    font-size: 1.14rem;
  }

  .product-heading {
    align-items: flex-start;
  }

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

  .support-item,
  .support-item:first-child,
  .support-item:last-child,
  .support-item:nth-child(3n),
  .support-item:nth-child(even) {
    grid-column: auto;
    border-right: 0;
    border-bottom: 1px solid #cfd8d5;
  }

  .support-item:last-child {
    border-bottom: 0;
  }
}