/* ═══════════════════════════════════════════════
   base.css — Reset, global styles, utilities
═══════════════════════════════════════════════ */

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  background: var(--washi);
  color: var(--sumi);
  font-family: var(--ff-sans-jp);
  font-weight: 300;
  line-height: 1.8;
  overflow-x: hidden;
}

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

a {
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font: inherit;
}

/* ── Shared section kicker ── */
.section-kicker {
  font-size: 0.58rem;
  letter-spacing: 0.5em;
  color: var(--lila-soft);
  margin-bottom: 2.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}
.section-kicker::before {
  content: '';
  width: 1.5rem;
  height: 0.5px;
  background: var(--kinshu);
  flex-shrink: 0;
}

/* ── Scroll reveal ── */
.rv {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}
.rv.in {
  opacity: 1;
  transform: translateY(0);
}
.rv-d1 { transition-delay: 0.1s; }
.rv-d2 { transition-delay: 0.2s; }
.rv-d3 { transition-delay: 0.3s; }

/* ── Shared "→ link" style ── */
.arrow-link {
  display: inline-flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.6rem;
  letter-spacing: 0.25em;
  text-decoration: none;
  transition: gap 0.2s;
}
.arrow-link::after { content: '→'; }
.arrow-link:hover  { gap: 1.2rem; }