:root {
  --bg: #ffffff;
  --text: #141414;
  --muted: #6e6e73;
  --line: #e8e8ed;
  --accent: #4b5563;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

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

code {
  font-family: "SFMono-Regular", Menlo, Consolas, monospace;
  font-size: 0.92em;
}

.wrap {
  width: min(1040px, calc(100% - 40px));
  margin: 0 auto;
  min-height: 100vh;
  border-left: 1px solid #e3e3e8;
  border-right: 1px solid #e3e3e8;
  padding-left: 28px;
  padding-right: 28px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  min-height: 64px;
  border-bottom: 1px solid var(--line);
}

.brand {
  font-size: 0.98rem;
  color: #56565b;
  letter-spacing: -0.01em;
}

.brand strong {
  color: var(--text);
}

.nav {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.nav a {
  color: var(--muted);
  font-size: 0.95rem;
}

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

.hero {
  position: relative;
  overflow: hidden;
  padding: 92px 0 68px;
  background: linear-gradient(180deg, #ffffff 0%, #fbfbfc 100%);
  border-bottom: 1px solid var(--line);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0 0 0 54%;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.9) 14%, rgba(255, 255, 255, 0.96) 32%, rgba(255, 255, 255, 0.26) 100%),
    url("./hero-japanese-minimal.svg");
  background-repeat: no-repeat;
  background-position: right 18px center;
  background-size: contain;
  pointer-events: none;
  opacity: 0.92;
}

.hero::after {
  content: "";
  position: absolute;
  right: 7%;
  bottom: 18%;
  width: 236px;
  height: 92px;
  border-radius: 999px;
  background: linear-gradient(180deg, #fbfbfa 0%, #f1f1ef 100%);
  box-shadow:
    0 14px 30px rgba(0, 0, 0, 0.04),
    0 0 0 1px rgba(210, 210, 215, 0.32);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
}

.hero h1 {
  margin: 0;
  font-size: clamp(3.7rem, 8vw, 6rem);
  line-height: 0.96;
  letter-spacing: -0.04em;
  font-weight: 700;
  max-width: 11ch;
}

.hero p {
  max-width: 520px;
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 1.16rem;
  line-height: 1.45;
  letter-spacing: -0.01em;
}

.content {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 56px;
  padding: 48px 0 84px;
}

.toc h2,
.main h2 {
  margin: 0 0 12px;
  font-size: 2rem;
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.main .section-label {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  line-height: 1.2;
  text-transform: uppercase;
}

.toc {
  padding-top: 2px;
}

.toc nav {
  padding-right: 10px;
}

.toc a {
  display: block;
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.35;
}

.toc a:hover {
  color: var(--accent);
}

.main section {
  margin-bottom: 54px;
}

.main p {
  margin: 0 0 18px;
  color: #1d1d1f;
  font-size: 1.08rem;
  line-height: 1.8;
  max-width: 700px;
}

.contact-card {
  max-width: 620px;
  padding: 4px 0 4px;
}

.contact-head {
  margin: 0 0 8px;
}

.contact-name {
  margin: 0;
  font-size: 1.6rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.05;
}

.contact-role {
  margin: 0;
  color: var(--muted);
  font-size: 1.02rem;
  line-height: 1.45;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.contact-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-weight: 500;
  font-size: 0.96rem;
}

.contact-link svg {
  width: 14px;
  height: 14px;
  flex: 0 0 14px;
  color: #8e8e93;
}

.contact-link span {
  color: inherit;
}

.contact-link:hover {
  color: var(--text);
}

.cards {
  display: grid;
  gap: 22px;
}

.card {
  border: 1px solid rgba(229, 229, 234, 0.9);
  border-radius: 26px;
  padding: 24px 26px;
  background: linear-gradient(180deg, rgba(255,255,255,0.98) 0%, rgba(250,250,252,0.98) 100%);
  box-shadow:
    0 10px 30px rgba(15, 23, 42, 0.05),
    0 1px 0 rgba(255, 255, 255, 0.9) inset;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
  backdrop-filter: blur(12px);
}

.card small {
  display: block;
  margin-bottom: 10px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: 0.78rem;
}

.card h3 {
  margin: 0 0 10px;
  font-size: 1.32rem;
  letter-spacing: -0.03em;
  line-height: 1.12;
}

.card h3 a {
  color: inherit;
}

.card h3 a:hover {
  color: var(--accent);
}

.card p {
  margin: 0 0 16px;
  max-width: none;
  color: #3a3a3c;
}

.card a {
  color: var(--accent);
  font-weight: 600;
}

.card a:hover {
  color: #1d1d1f;
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(214, 214, 219, 0.95);
  box-shadow:
    0 18px 42px rgba(15, 23, 42, 0.08),
    0 1px 0 rgba(255, 255, 255, 0.95) inset;
}

.note-list {
  display: grid;
  gap: 18px;
}

.note-item {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 18px;
  align-items: start;
  padding: 0 0 18px;
  border-bottom: 1px solid var(--line);
}

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

.note-item small {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.note-item a {
  color: inherit;
  font-weight: 600;
  text-decoration: none;
}

.note-item a:hover {
  color: var(--accent);
}

.note-item p {
  margin: 6px 0 0;
}

.note-thumb {
  display: block;
  width: 100%;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--line);
  background: #f4f4f4;
}

.note-thumb img {
  display: block;
  width: 100%;
  height: auto;
}

.intro-text {
  margin-bottom: 36px;
  max-width: 640px;
}

.intro-text p {
  color: #2b2b30;
  font-size: 1.04rem;
  line-height: 1.72;
}

.license-note {
  margin-top: 10px;
  max-width: 620px;
  color: #8a8a8f;
  font-size: 0.76rem;
  line-height: 1.55;
}

.signature-title {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.license-note a {
  color: #6e6e73;
}

@media (max-width: 840px) {
  .content {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .toc nav {
    padding-right: 0;
    padding-bottom: 0;
  }

  .note-item {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .wrap {
    width: min(100% - 24px, 1040px);
    padding-left: 16px;
    padding-right: 16px;
  }

  .topbar {
    padding: 12px 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .hero {
    padding: 52px 0 38px;
  }

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