:root {
  color-scheme: light;
  --ink: #18201d;
  --muted: #5d6962;
  --paper: #fbfaf5;
  --surface: #ffffff;
  --line: rgba(24, 32, 29, 0.13);
  --green: #0f5c45;
  --green-soft: #d8eee5;
  --clay: #b46a38;
  --coral: #d65745;
  --shadow: 0 18px 50px rgba(16, 29, 24, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family:
    "Hiragino Sans", "Yu Gothic", "YuGothic", "Noto Sans JP", system-ui,
    -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.7;
}

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

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 68px);
  color: #ffffff;
}

.site-header::before {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  background: linear-gradient(180deg, rgba(16, 25, 21, 0.68), rgba(16, 25, 21, 0));
  pointer-events: none;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  font-weight: 800;
  letter-spacing: 0;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.42);
  object-fit: cover;
}

.brand span {
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(14px, 3vw, 34px);
  font-size: 0.94rem;
  font-weight: 700;
}

.nav-links a {
  opacity: 0.88;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  opacity: 1;
}

.hero {
  position: relative;
  display: grid;
  min-height: min(760px, 88svh);
  overflow: hidden;
  background-image: url("/assets/hero-genkan-watch.jpg");
  background-position: center;
  background-size: cover;
  color: #ffffff;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(9, 20, 17, 0.82) 0%, rgba(9, 20, 17, 0.63) 37%, rgba(9, 20, 17, 0.2) 72%),
    linear-gradient(180deg, rgba(9, 20, 17, 0.38) 0%, rgba(9, 20, 17, 0) 44%, rgba(9, 20, 17, 0.5) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  align-self: center;
  width: min(680px, calc(100% - 40px));
  margin-left: clamp(20px, 7vw, 92px);
  padding-top: 74px;
  padding-bottom: 116px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #d8f2e7;
}

h1,
h2,
h3,
p {
  overflow-wrap: break-word;
}

h1 {
  margin: 0;
  font-size: clamp(3.8rem, 13vw, 8rem);
  line-height: 0.94;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(1.9rem, 4vw, 3.35rem);
  line-height: 1.14;
  letter-spacing: 0;
  word-break: keep-all;
}

h3 {
  margin: 0 0 10px;
  font-size: 1.15rem;
  line-height: 1.35;
  letter-spacing: 0;
}

.hero-copy {
  width: min(600px, 100%);
  margin: 24px 0 0;
  font-size: clamp(1.05rem, 2.4vw, 1.45rem);
  font-weight: 700;
  line-height: 1.7;
}

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

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 12px 18px;
  font-weight: 800;
  line-height: 1.2;
}

.button.primary {
  background: #ffffff;
  color: var(--ink);
}

.button.secondary {
  border-color: rgba(255, 255, 255, 0.52);
  color: #ffffff;
}

.hero-strip {
  position: absolute;
  right: clamp(16px, 5vw, 68px);
  bottom: 22px;
  left: clamp(16px, 5vw, 68px);
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.17);
  backdrop-filter: blur(18px);
}

.hero-strip span {
  min-height: 58px;
  padding: 15px 16px;
  background: rgba(12, 28, 23, 0.36);
  font-size: 0.93rem;
  font-weight: 800;
}

.section-band {
  padding: clamp(68px, 9vw, 118px) clamp(20px, 5vw, 68px);
}

.section-band.light {
  background: #eef7f1;
}

.section-band.accent {
  background: #f4dfd5;
}

.section-band.dark {
  background: #13231d;
  color: #ffffff;
}

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

.two-column {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(280px, 1fr);
  gap: clamp(30px, 6vw, 86px);
  align-items: start;
}

.intro p,
.principle p,
.status p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(1rem, 2vw, 1.18rem);
}

.principle p {
  color: #4d413a;
}

.status .section-kicker {
  color: #9fe0c3;
}

.status p {
  width: min(760px, 100%);
  margin-top: 22px;
  color: #d7e7df;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.75fr) minmax(280px, 1fr);
  gap: clamp(24px, 5vw, 64px);
  margin-bottom: clamp(30px, 6vw, 58px);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.feature-card {
  min-height: 248px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
  padding: 22px;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.7) inset;
}

.feature-index {
  display: inline-flex;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  margin-bottom: 28px;
  border-radius: 50%;
  background: var(--green-soft);
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 900;
}

.feature-card p,
.flow-list p {
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
}

.flow-list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
  box-shadow: var(--shadow);
}

.flow-list li {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
  background: var(--surface);
  padding: clamp(22px, 4vw, 34px);
}

.flow-list > li > span {
  display: inline-flex;
  width: 54px;
  height: 54px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--ink);
  color: #ffffff;
  font-weight: 900;
}

.status-inner {
  padding: 10px 0;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(20px, 5vw, 68px);
  background: #0e1714;
  color: #ffffff;
}

.footer-brand img {
  width: 32px;
  height: 32px;
}

.site-footer p {
  margin: 0;
  color: #b9c8c0;
  font-size: 0.9rem;
}

@media (max-width: 920px) {
  .site-header {
    padding: 14px 20px;
  }

  .nav-links {
    gap: 16px;
    font-size: 0.86rem;
  }

  .hero {
    min-height: 86svh;
    background-position: 58% center;
  }

  .hero-content {
    width: calc(100% - 40px);
    margin: 0 auto;
    padding-bottom: 156px;
  }

  .hero-overlay {
    background:
      linear-gradient(90deg, rgba(9, 20, 17, 0.84) 0%, rgba(9, 20, 17, 0.62) 58%, rgba(9, 20, 17, 0.35) 100%),
      linear-gradient(180deg, rgba(9, 20, 17, 0.3) 0%, rgba(9, 20, 17, 0.05) 44%, rgba(9, 20, 17, 0.65) 100%);
  }

  .hero-strip,
  .two-column,
  .section-heading {
    grid-template-columns: 1fr;
  }

  .hero-strip {
    right: 20px;
    left: 20px;
  }

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

@media (max-width: 640px) {
  .site-header {
    align-items: flex-start;
  }

  .brand img {
    width: 36px;
    height: 36px;
  }

  .nav-links {
    display: none;
  }

  .hero {
    min-height: 84svh;
    background-position: 63% center;
  }

  h1 {
    font-size: clamp(3.2rem, 18vw, 4.6rem);
  }

  h2 {
    overflow-wrap: anywhere;
    word-break: normal;
  }

  .hero-copy {
    font-size: 1.04rem;
  }

  .button {
    width: 100%;
  }

  .hero-strip {
    bottom: 14px;
    gap: 0;
  }

  .hero-strip span {
    min-height: auto;
    padding: 10px 12px;
    font-size: 0.82rem;
  }

  .section-band {
    padding: 58px 20px;
  }

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

  .feature-card {
    min-height: 0;
  }

  .flow-list li {
    grid-template-columns: 44px minmax(0, 1fr);
    gap: 14px;
  }

  .flow-list > li > span {
    width: 40px;
    height: 40px;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
  }
}