:root {
  color-scheme: dark;
  --background: #0a0a0a;
  --surface: #111111;
  --text: #f5f5f2;
  --muted: #a4a4a0;
  --line: #2a2a28;
  --accent: #d7ff3f;
  --page-padding: clamp(1.25rem, 4vw, 4.5rem);
  --max-width: 1440px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--background);
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: clip;
  background: var(--background);
  color: var(--text);
  font-family: Inter, "Helvetica Neue", Helvetica, Arial, "Noto Sans JP", sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.22em;
}

a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 5px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 1rem;
  left: 1rem;
  padding: 0.7rem 1rem;
  transform: translateY(-200%);
  background: var(--accent);
  color: #050505;
  font-weight: 700;
}

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

.site-header,
.site-footer,
.section,
.hero {
  width: min(100%, var(--max-width));
  margin-inline: auto;
  padding-inline: var(--page-padding);
}

.site-header {
  position: absolute;
  z-index: 10;
  top: 0;
  left: 50%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1.5rem;
  transform: translateX(-50%);
}

.wordmark {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 800;
  letter-spacing: 0.18em;
}

nav {
  display: flex;
  gap: clamp(1rem, 3vw, 2.5rem);
}

nav a,
.site-footer a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  transition: color 160ms ease;
}

nav a:hover,
.site-footer a:hover {
  color: var(--text);
}

.hero {
  position: relative;
  display: grid;
  min-height: 100svh;
  padding-top: 8rem;
  padding-bottom: 2rem;
  overflow: hidden;
}

.hero::before {
  position: absolute;
  top: 0;
  right: 13%;
  width: 1px;
  height: 100%;
  background: linear-gradient(transparent, var(--line) 15%, var(--line) 85%, transparent);
  content: "";
}

.hero-index {
  align-self: start;
  justify-self: end;
  color: var(--muted);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  opacity: 0.48;
}

.hero-content {
  align-self: center;
}

.eyebrow,
.section-number,
.project-meta,
.policy-date {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1 {
  display: flex;
  flex-direction: column;
  margin: 1rem 0 2rem;
  font-size: clamp(4rem, 15vw, 13rem);
  font-weight: 800;
  letter-spacing: -0.075em;
  line-height: 0.78;
}

.hero h1 span:last-child {
  margin-left: clamp(0.75rem, 8vw, 8rem);
  color: transparent;
  -webkit-text-stroke: 1px rgba(245, 245, 242, 0.64);
}

.hero-copy {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(1.5rem, 5vw, 5rem);
  max-width: 54rem;
  margin-left: clamp(0.75rem, 8vw, 8rem);
}

.hero-copy p {
  margin: 0;
  font-size: clamp(1rem, 1.7vw, 1.25rem);
}

.hero-copy p:last-child {
  color: var(--muted);
}

.scroll-cue {
  align-self: end;
  justify-self: end;
  display: flex;
  gap: 1rem;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  opacity: 0.5;
}

.section {
  display: grid;
  grid-template-columns: minmax(11rem, 0.55fr) minmax(0, 1.45fr);
  gap: clamp(2rem, 8vw, 8rem);
  padding-top: clamp(5rem, 8.5vw, 8.5rem);
  padding-bottom: clamp(5rem, 8.5vw, 8.5rem);
  border-top: 1px solid var(--line);
}

.section-heading {
  align-self: start;
}

.section-number {
  margin: 0 0 0.8rem;
  color: var(--accent);
}

.section h2 {
  margin: 0;
  font-size: clamp(1.45rem, 3vw, 2.5rem);
  line-height: 1;
  letter-spacing: -0.04em;
}

.split-copy {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(2rem, 5vw, 5rem);
}

.split-copy p {
  margin: 0 0 1.5rem;
  font-size: clamp(1.1rem, 2vw, 1.5rem);
  line-height: 1.72;
}

.split-copy [lang="en"] {
  color: var(--muted);
}

.project {
  grid-template-columns: 1fr;
  background: var(--surface);
}

.project .section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.project-card {
  padding-top: clamp(2rem, 5vw, 5rem);
  border-top: 1px solid var(--line);
}

.project-meta {
  display: flex;
  justify-content: space-between;
}

.project-meta p {
  margin: 0;
}

.project-card h3 {
  display: flex;
  flex-direction: column;
  margin: clamp(3rem, 9vw, 8rem) 0;
  font-size: clamp(4.3rem, 16vw, 13rem);
  font-weight: 800;
  letter-spacing: -0.075em;
  line-height: 0.78;
}

.project-card h3 span:last-child {
  align-self: flex-end;
  color: var(--accent);
}

.project-copy {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(2rem, 5vw, 5rem);
  width: min(100%, 52rem);
  margin-left: auto;
}

.project-copy p {
  margin: 0 0 1.15rem;
  font-size: clamp(1rem, 1.6vw, 1.2rem);
  line-height: 1.75;
}

.project-copy > [lang="en"] {
  color: var(--muted);
}

.contact-content {
  display: grid;
  gap: 4rem;
}

.contact-content p {
  margin: 0.2rem 0;
}

.contact-content p[lang="en"] {
  color: var(--muted);
}

.contact-links {
  display: grid;
  gap: 1.25rem;
}

.email-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--text);
  text-decoration: none;
  font-size: clamp(1.5rem, 5vw, 4.4rem);
  font-weight: 500;
  letter-spacing: -0.045em;
}

.email-link span:last-child {
  color: var(--accent);
  font-size: 0.7em;
}

.social-links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  color: var(--muted);
}

.social-icon-link {
  display: inline-grid;
  width: 44px;
  height: 44px;
  place-items: center;
  color: var(--muted);
  text-decoration: none;
  transition: color 160ms ease;
}

.social-icon-link:hover {
  color: var(--accent);
}

.social-icon {
  display: block;
  width: 20px;
  height: 20px;
  background-color: currentColor;
  mask-position: center;
  mask-repeat: no-repeat;
  mask-size: contain;
  -webkit-mask-position: center;
  -webkit-mask-repeat: no-repeat;
  -webkit-mask-size: contain;
}

.social-icon-x {
  width: 18px;
  height: 18px;
  mask-image: url("./assets/x.svg");
  -webkit-mask-image: url("./assets/x.svg");
}

.social-icon-tiktok {
  mask-image: url("./assets/tiktok.svg");
  -webkit-mask-image: url("./assets/tiktok.svg");
}

.social-icon-youtube {
  width: 22px;
  mask-image: url("./assets/youtube.svg");
  -webkit-mask-image: url("./assets/youtube.svg");
}

.privacy {
  background: #0d0d0d;
}

.policy-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(2rem, 5vw, 5rem);
}

.policy-grid article:last-child {
  color: #c8c8c4;
}

.policy-grid h3 {
  margin: 0;
  font-size: 1.35rem;
}

.policy-grid h4 {
  margin: 2.25rem 0 0.5rem;
  color: var(--text);
  font-size: 1rem;
}

.policy-grid p {
  margin: 0;
  line-height: 1.8;
}

.policy-date {
  margin-top: 0.7rem !important;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 2rem;
  padding-top: 2rem;
  padding-bottom: 2rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer p {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
}

.site-footer > a:last-child {
  justify-self: end;
}

@media (max-width: 760px) {
  .site-header {
    padding-top: 1.1rem;
  }

  nav {
    gap: 0.75rem;
  }

  nav a {
    font-size: 0.68rem;
    letter-spacing: 0.045em;
  }

  .hero {
    min-height: 92svh;
    padding-top: 7rem;
  }

  .hero::before {
    right: 1.25rem;
  }

  .hero h1 {
    margin-top: 1.4rem;
    font-size: clamp(3.5rem, 18.5vw, 7rem);
    line-height: 0.86;
    letter-spacing: -0.065em;
  }

  .hero h1 span:last-child {
    margin-left: 0;
  }

  .hero-copy,
  .project-copy,
  .split-copy,
  .policy-grid {
    grid-template-columns: 1fr;
  }

  .hero-copy {
    gap: 0.7rem;
    margin-left: 0;
  }

  .section {
    grid-template-columns: 1fr;
    gap: 2.75rem;
  }

  .project .section-heading {
    display: block;
  }

  .project-card h3 {
    margin: 4rem 0;
    font-size: clamp(3.25rem, 18.5vw, 6rem);
    line-height: 0.86;
    letter-spacing: -0.065em;
  }

  .project-card h3 span:last-child {
    align-self: flex-start;
  }

  .project-copy,
  .split-copy,
  .policy-grid {
    gap: 1.75rem;
  }

  .email-link {
    min-width: 0;
    font-size: clamp(1.25rem, 6.2vw, 1.85rem);
  }

  .email-link span:first-child {
    min-width: 0;
    overflow-wrap: anywhere;
  }

  [lang="ja"] {
    line-break: strict;
    word-break: normal;
  }

  .policy-grid p {
    line-height: 1.85;
  }

  .site-footer {
    grid-template-columns: 1fr auto;
  }

  .site-footer p {
    grid-column: 1 / -1;
    grid-row: 2;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}