:root {
  --navy: #102b52;
  --ink: #263b56;
  --blue: #20a6b5;
  --aqua: #59c7cf;
  --foam: #f5fbfc;
  --paper: #f3f3f7;
  --line: rgba(61, 188, 199, 0.2);
  --muted: #7d8490;
  --coral: #ff8d42;
  --yellow: #ffd35a;
  --shadow: 0 24px 58px rgba(27, 85, 112, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Hiragino Maru Gothic ProN", "Hiragino Sans", -apple-system, BlinkMacSystemFont, "Yu Gothic", "YuGothic", "Noto Sans JP", sans-serif;
  background: #fff;
  letter-spacing: 0;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 14px clamp(18px, 4vw, 52px);
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(61, 188, 199, 0.14);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--navy);
  font-weight: 700;
  text-decoration: none;
}

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 9px;
}

.site-header nav {
  display: flex;
  gap: clamp(12px, 2.3vw, 28px);
  color: var(--blue);
  font-size: 0.92rem;
  font-weight: 700;
}

.site-header nav a {
  text-decoration: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(320px, 0.72fr) minmax(360px, 0.58fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  padding: clamp(28px, 5vw, 74px) clamp(18px, 5vw, 76px) clamp(62px, 7vw, 96px);
  background:
    radial-gradient(circle at 4% 20%, rgba(89, 199, 207, 0.2), transparent 24%),
    linear-gradient(180deg, #fbfeff 0%, #edf9fb 100%);
}

.hero__poster {
  justify-self: center;
  width: min(620px, 100%);
}

.hero__poster img {
  width: auto;
  max-height: calc(100vh - 150px);
  margin: 0 auto;
  border-radius: 30px;
  box-shadow: var(--shadow);
}

.hero__copy {
  max-width: 530px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 20px;
  color: var(--navy);
  font-size: clamp(2.5rem, 4.8vw, 4.65rem);
  font-weight: 760;
  line-height: 1.14;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  color: var(--navy);
  font-size: clamp(1.9rem, 3.8vw, 3.35rem);
  font-weight: 740;
  line-height: 1.24;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  color: var(--navy);
  font-size: 1.22rem;
  font-weight: 720;
  line-height: 1.35;
}

p {
  color: var(--muted);
  font-size: 1.04rem;
  line-height: 1.9;
}

.hero__copy p {
  font-size: 1.12rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  min-height: 54px;
  align-items: center;
  justify-content: center;
  padding: 0 28px;
  color: #fff;
  font-weight: 720;
  text-decoration: none;
  background: linear-gradient(135deg, var(--blue), var(--aqua));
  border-radius: 999px;
  box-shadow: 0 18px 34px rgba(0, 133, 173, 0.27);
}

.hero__actions span {
  color: var(--blue);
  font-weight: 720;
}

.section-inner {
  width: min(1120px, calc(100% - 36px));
  margin: 0 auto;
}

.message {
  padding: clamp(72px, 9vw, 126px) 0;
  background: #fff;
}

.message__inner {
  display: grid;
  grid-template-columns: 0.96fr 0.84fr;
  gap: clamp(30px, 7vw, 96px);
  align-items: end;
}

.message__inner p:last-child {
  margin-bottom: 8px;
}

.features {
  padding: clamp(76px, 10vw, 132px) 0;
  background:
    radial-gradient(circle at 92% 12%, rgba(255, 211, 90, 0.18), transparent 22%),
    linear-gradient(180deg, var(--paper), #fff);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 34px;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.feature {
  min-height: 230px;
  padding: 28px;
  background: rgba(255, 255, 255, 0.96);
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: 0 16px 38px rgba(36, 111, 134, 0.06);
}

.feature--wide {
  display: grid;
  grid-column: span 2;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 0.72fr);
  gap: 24px;
  align-items: center;
  background: linear-gradient(135deg, #fff, #edfafa);
}

.number {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--blue);
  font-size: 0.9rem;
  font-weight: 720;
}

.mock-card {
  padding: 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: 0 18px 40px rgba(0, 106, 146, 0.14);
}

.photo-card__image {
  aspect-ratio: 1.2;
  margin-bottom: 12px;
  background:
    linear-gradient(180deg, rgba(0, 133, 173, 0), rgba(0, 50, 98, 0.08)),
    url("./assets/umi-note-reference.png") center 39% / 220%;
  border-radius: 16px;
}

.photo-card b,
.photo-card span {
  display: block;
}

.photo-card b {
  color: var(--navy);
}

.photo-card span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.82rem;
}

.visual-section {
  overflow: hidden;
  padding: clamp(78px, 10vw, 136px) 0;
  background:
    linear-gradient(180deg, rgba(16, 43, 82, 0.04), rgba(16, 43, 82, 0.38)),
    url("./assets/ocean-background.png") center / cover;
}

.visual-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(320px, 0.6fr);
  gap: clamp(30px, 7vw, 92px);
  align-items: center;
}

.visual-grid h2,
.visual-grid .eyebrow {
  color: #fff;
}

.visual-grid p {
  color: rgba(255, 255, 255, 0.84);
}

.screenshot-frame {
  justify-self: center;
  width: min(390px, 100%);
  padding: 10px;
  background: rgba(255, 255, 255, 0.64);
  border: 1px solid rgba(255, 255, 255, 0.72);
  border-radius: 40px;
  box-shadow: 0 32px 70px rgba(0, 24, 56, 0.24);
}

.screenshot-frame img {
  width: 100%;
  border-radius: 31px;
  box-shadow: 0 10px 28px rgba(22, 45, 72, 0.14);
}

.flow {
  padding: clamp(76px, 10vw, 128px) 0;
  background:
    radial-gradient(circle at 18% 8%, rgba(89, 199, 207, 0.16), transparent 22%),
    #fff;
}

.flow-story {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.flow-story article {
  position: relative;
  min-height: 280px;
  padding: 30px;
  overflow: hidden;
  background: linear-gradient(180deg, #fff, #f3fbfc);
  border: 1px solid var(--line);
  border-radius: 32px;
  box-shadow: 0 18px 44px rgba(36, 111, 134, 0.07);
}

.flow-story article::after {
  position: absolute;
  right: -34px;
  bottom: -34px;
  width: 136px;
  height: 136px;
  content: "";
  background: radial-gradient(circle, rgba(89, 199, 207, 0.22), rgba(89, 199, 207, 0));
  border-radius: 50%;
}

.flow-story span {
  display: inline-flex;
  align-items: center;
  min-height: 38px;
  margin-bottom: 20px;
  padding: 0 16px;
  color: var(--blue);
  font-size: 0.86rem;
  font-weight: 720;
  background: #ddf7fa;
  border-radius: 999px;
}

.release {
  padding: clamp(80px, 11vw, 140px) 0;
  color: #fff;
  text-align: center;
  background:
    radial-gradient(circle at 50% 0%, rgba(255, 211, 90, 0.34), transparent 28%),
    linear-gradient(165deg, #36b8c3, #0d4f80);
}

.release__inner {
  max-width: 760px;
}

.release img {
  width: 112px;
  margin: 0 auto 22px;
  border-radius: 28px;
  box-shadow: 0 24px 52px rgba(0, 0, 0, 0.28);
}

.release h2,
.release .eyebrow,
.release p {
  color: #fff;
}

.button--light {
  margin-top: 18px;
  color: var(--navy);
  background: #fff;
}

@media (max-width: 980px) {
  .hero,
  .message__inner,
  .visual-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 24px;
  }

  .hero__poster {
    width: min(520px, 100%);
  }

  .hero__copy {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
  }

  .hero__actions {
    justify-content: center;
  }

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

  .feature--wide {
    grid-column: span 2;
  }

  .flow-story {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .site-header {
    padding: 10px 14px;
  }

  .site-header nav {
    gap: 12px;
    font-size: 0.78rem;
  }

  .brand span {
    display: none;
  }

  .hero {
    gap: 32px;
    padding: 18px 14px 58px;
  }

  .hero__poster img {
    width: 100%;
    max-height: none;
    border-radius: 18px;
  }

  .hero__copy {
    text-align: left;
  }

  .hero__actions {
    justify-content: flex-start;
  }

  h1 {
    font-size: clamp(2.28rem, 11.5vw, 3.25rem);
  }

  h2 {
    font-size: clamp(2rem, 10vw, 2.75rem);
  }

  p,
  .hero__copy p {
    font-size: 1rem;
    line-height: 1.85;
  }

  .feature-list,
  .feature--wide {
    grid-template-columns: 1fr;
  }

  .feature--wide {
    grid-column: auto;
  }

  .feature {
    min-height: auto;
    padding: 22px;
    border-radius: 22px;
  }

  .screenshot-frame {
    width: min(330px, 100%);
    border-radius: 34px;
  }

  .screenshot-frame img {
    border-radius: 26px;
  }
}