/* ============ Reset & Base ============ */
* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg: #fafaf8;
  --fg: #1a1a1a;
  --muted: #6b6b6b;
  --line: #e5e5e0;
}

html { font-size: 16px; }
body {
  font-family: "Inter", "Helvetica Neue", "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  font-weight: 400;
  color: var(--fg);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

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

/* ============ Stage ============ */
.stage {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 4rem 2.5rem 2rem;
  max-width: 960px;
  margin: 0 auto;
}

.content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 640px;
}

/* ============ Eyebrow ============ */
.eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 1.5rem;
}

/* ============ Logo ============ */
.logo {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  font-weight: 800;
  letter-spacing: 0.05em;
  margin-bottom: 3rem;
}

/* ============ Lead text ============ */
.lead-en {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.35;
  margin-bottom: 1.75rem;
}

.lead-jp {
  font-size: 1rem;
  color: var(--muted);
  margin-bottom: 3.5rem;
}

/* ============ Contact ============ */
.contact {
  border-top: 1px solid var(--line);
  padding-top: 1.75rem;
}
.contact-label {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 0.5rem;
}
.contact-mail {
  font-size: 1.125rem;
  font-weight: 500;
}
.contact-mail a {
  border-bottom: 1px solid var(--fg);
  padding-bottom: 2px;
  transition: opacity 0.2s;
}
.contact-mail a:hover { opacity: 0.5; }

/* ============ Footer ============ */
.foot {
  margin-top: 4rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
  font-size: 0.75rem;
  color: var(--muted);
}

/* ============ Responsive ============ */
@media (max-width: 540px) {
  .stage { padding: 3rem 1.5rem 1.5rem; }
  .logo { margin-bottom: 2.25rem; }
  .lead-jp { margin-bottom: 2.5rem; }
}