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

:root {
  --black: #080808;
  --white: #f8f8f4;
  --gray-dark: #111;
  --gray-mid: #1e1e1e;
  --gray-line: rgba(248,248,244,0.08);
  --accent: #c8c0a8;
  --serif: 'Cormorant Garamond', serif;
  --sans: 'Noto Sans JP', sans-serif;
  --display: 'Bebas Neue', sans-serif;
}

html { scroll-behavior: smooth; }

body {
  background: var(--black);
  color: var(--white);
  font-family: var(--sans);
  font-weight: 300;
  overflow-x: hidden;
  line-height: 1.8;
}

::-webkit-scrollbar { width: 2px; }
::-webkit-scrollbar-track { background: var(--black); }
::-webkit-scrollbar-thumb { background: rgba(248,248,244,0.2); }

/* ── NAV ── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.2rem 3rem;
  background: rgba(8,8,8,0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-line);
}
.nav-logo {
  font-family: var(--display);
  font-size: 1rem;
  letter-spacing: 0.18em;
  color: var(--white);
  text-decoration: none;
}
.nav-back {
  display: flex; align-items: center; gap: 0.5rem;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: rgba(248,248,244,0.5);
  text-decoration: none;
  transition: color 0.2s;
}
.nav-back:hover { color: var(--white); }
.nav-back svg { width: 14px; height: 14px; }

/* ── HERO ── */
.hero {
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  padding-top: 64px;
}
.hero-left {
  display: flex; flex-direction: column;
  justify-content: flex-end;
  padding: 6rem 4rem 5rem;
  position: relative;
}
.hero-left::after {
  content: '';
  position: absolute; top: 0; right: 0; bottom: 0;
  width: 1px;
  background: var(--gray-line);
}
.hero-eyebrow {
  font-size: 0.68rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}
.hero-title {
  font-family: var(--display);
  font-size: clamp(3.5rem, 7vw, 6rem);
  line-height: 0.95;
  letter-spacing: 0.04em;
  color: var(--white);
  margin-bottom: 1rem;
}
.hero-title-ja {
  font-family: var(--serif);
  font-size: clamp(1rem, 2vw, 1.4rem);
  font-style: italic;
  font-weight: 300;
  color: var(--accent);
  margin-bottom: 2.5rem;
}
.hero-lead {
  font-size: 0.88rem;
  line-height: 2.1;
  color: rgba(248,248,244,0.82);
  max-width: 440px;
  margin-bottom: 3rem;
}
.hero-cta {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 1rem 2.5rem;
  border: 1px solid var(--white);
  color: var(--white);
  text-decoration: none;
  transition: background 0.3s, color 0.3s;
}
.hero-cta:hover {
  background: var(--white);
  color: var(--black);
}

.hero-right {
  position: relative;
  overflow: hidden;
  background: #0d0d0d;
}
.hero-img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
  filter: brightness(0.92);
}

/* ── SPECS STRIP ── */
.specs-strip {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  border-top: 1px solid var(--gray-line);
  border-bottom: 1px solid var(--gray-line);
}
.spec-item {
  padding: 2.5rem 2rem;
  border-right: 1px solid var(--gray-line);
  text-align: center;
}
.spec-item:last-child { border-right: none; }
.spec-value {
  font-family: var(--display);
  font-size: 2rem;
  letter-spacing: 0.06em;
  color: var(--white);
  display: block;
  line-height: 1;
  margin-bottom: 0.5rem;
}
.spec-unit {
  font-size: 0.7rem;
  color: var(--accent);
}
.spec-label {
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: rgba(248,248,244,0.45);
  text-transform: uppercase;
}

/* ── SECTION COMMON ── */
.section {
  padding: 8rem 4rem;
}
.section-label {
  font-size: 0.65rem;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  margin-bottom: 1rem;
}
.section-title {
  font-family: var(--serif);
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-style: italic;
  font-weight: 300;
  color: var(--white);
  line-height: 1.4;
  margin-bottom: 1.5rem;
}
.feature-heading {
  font-family: var(--sans);
  font-style: normal;
  font-weight: 700;
  letter-spacing: 0.04em;
}
.section-text {
  font-size: 0.88rem;
  line-height: 2.2;
  color: rgba(248,248,244,0.82);
}

/* ── FEATURE SECTION ── */
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--gray-line);
  margin-top: 5rem;
}
.feature-card {
  background: var(--black);
  padding: 3.5rem;
}
.feature-card:hover { background: #0e0e0e; }
.feature-num {
  font-family: var(--display);
  font-size: 3rem;
  color: rgba(248,248,244,0.06);
  line-height: 1;
  margin-bottom: 1.5rem;
}
.feature-title {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--white);
  margin-bottom: 0.8rem;
}
.feature-text {
  font-size: 0.82rem;
  line-height: 2.1;
  color: rgba(248,248,244,0.82);
}

/* ── INDEX SECTION ── */
.index-section {
  background: var(--gray-dark);
  padding: 8rem 4rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: center;
}
.index-photo {
  width: 100%;
  aspect-ratio: 3/4;
  object-fit: cover;
  border-radius: 2px;
}
.sticker-row {
  display: flex; gap: 1rem;
  margin: 2rem 0;
  align-items: center;
}
.sticker {
  width: 36px; height: 36px;
  border-radius: 50%;
  flex-shrink: 0;
}
.sticker-caption {
  font-size: 0.72rem;
  color: rgba(248,248,244,0.5);
  letter-spacing: 0.08em;
}

/* ── CONTENTS SECTION ── */
.contents-section {
  padding: 8rem 4rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: center;
}
.contents-photo {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: 2px;
}
.contents-list {
  list-style: none;
  margin-top: 2rem;
}
.contents-list li {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--gray-line);
  font-size: 0.85rem;
  color: rgba(248,248,244,0.82);
}
.contents-list li:first-child { border-top: 1px solid var(--gray-line); }
.contents-list .item-num {
  font-family: var(--display);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  min-width: 28px;
}

/* ── SPECS TABLE ── */
.specs-section {
  background: var(--gray-dark);
  padding: 8rem 4rem;
}
.specs-table {
  width: 100%;
  max-width: 700px;
  margin-top: 3rem;
  border-top: 1px solid var(--gray-line);
}
.specs-row {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 2rem;
  padding: 1.4rem 0;
  border-bottom: 1px solid var(--gray-line);
  align-items: baseline;
}
.specs-key {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(248,248,244,0.38);
}
.specs-val {
  font-size: 0.88rem;
  color: rgba(248,248,244,0.88);
  line-height: 1.8;
}

/* ── CUSTOM SECTION ── */
.custom-section {
  padding: 8rem 4rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: center;
  border-top: 1px solid var(--gray-line);
}
.custom-options {
  margin-top: 2rem;
  display: flex; flex-direction: column; gap: 0;
}
.custom-option {
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--gray-line);
  display: flex; align-items: center; gap: 1.2rem;
}
.custom-option:first-child { border-top: 1px solid var(--gray-line); }
.custom-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}
.custom-option span {
  font-size: 0.84rem;
  color: rgba(248,248,244,0.82);
}
.custom-note {
  margin-top: 2rem;
  font-size: 0.75rem;
  color: rgba(248,248,244,0.38);
  line-height: 2;
  padding: 1.5rem;
  border: 1px solid var(--gray-line);
  border-radius: 2px;
}
.custom-visual {
  display: flex; flex-direction: column; gap: 12px;
}
.custom-vis-row {
  height: 56px;
  border: 1px solid rgba(248,248,244,0.1);
  border-radius: 2px;
  position: relative;
  background: #0d0d0d;
  overflow: hidden;
}
.custom-vis-lines {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; justify-content: space-evenly;
  padding: 4px 16px;
}
.custom-vis-line { background: rgba(248,248,244,0.18); border-radius: 1px; }
.custom-vis-label {
  position: absolute;
  right: 12px; top: 50%;
  transform: translateY(-50%);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: rgba(248,248,244,0.25);
  text-transform: uppercase;
}

/* ── CTA ── */
.cta-section {
  padding: 8rem 4rem;
  text-align: center;
  border-top: 1px solid var(--gray-line);
}
.cta-title {
  font-family: var(--serif);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-style: italic;
  font-weight: 300;
  color: var(--white);
  margin-bottom: 1rem;
}
.cta-sub {
  font-size: 0.85rem;
  color: rgba(248,248,244,0.5);
  margin-bottom: 3rem;
}
.cta-btns {
  display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap;
}
.btn-primary {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 1rem 3rem;
  background: var(--white);
  color: var(--black);
  text-decoration: none;
  font-weight: 700;
  transition: background 0.2s;
}
.btn-primary:hover { background: var(--accent); }
.btn-secondary {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  padding: 1rem 3rem;
  border: 1px solid rgba(248,248,244,0.25);
  color: rgba(248,248,244,0.7);
  text-decoration: none;
  transition: border-color 0.2s, color 0.2s;
}
.btn-secondary:hover { border-color: var(--white); color: var(--white); }

/* ── FOOTER ── */
footer {
  padding: 3rem 4rem;
  border-top: 1px solid var(--gray-line);
  display: flex; align-items: center; justify-content: space-between;
}
.footer-logo {
  font-family: var(--display);
  font-size: 1rem;
  letter-spacing: 0.18em;
  color: rgba(248,248,244,0.15);
}
.footer-copy {
  font-size: 0.65rem;
  color: rgba(248,248,244,0.15);
  letter-spacing: 0.08em;
}

/* ── REVEAL ── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.8s, transform 0.8s;
}
.reveal.visible { opacity: 1; transform: none; }

/* ── MOBILE ── */
@media (max-width: 900px) {
  nav { padding: 1rem 1.5rem; }
  .hero { grid-template-columns: 1fr; }
  .hero-left { padding: 5rem 1.5rem 3rem; }
  .hero-left::after { display: none; }
  .hero-right { height: 60vw; }
  .specs-strip { grid-template-columns: repeat(3, 1fr); }
  .spec-item:nth-child(4), .spec-item:nth-child(5), .spec-item:nth-child(6) { border-top: 1px solid var(--gray-line); }
  .section { padding: 5rem 1.5rem; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { padding: 2.5rem 1.5rem; }
  .index-section, .contents-section, .custom-section { grid-template-columns: 1fr; gap: 3rem; padding: 5rem 1.5rem; }
  .specs-section { padding: 5rem 1.5rem; }
  .specs-row { grid-template-columns: 130px 1fr; }
  .cta-section { padding: 5rem 1.5rem; }
  footer { flex-direction: column; gap: 1rem; padding: 2rem 1.5rem; }
}