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

:root {
  --ink:    #18160f;
  --ink2:   #3a3830;
  --ink3:   #7a776e;
  --paper:  #f5f2eb;
  --paper2: #ede9df;
  --paper3: #e0dcd0;
  --border: #ccc9be;
  --dark:   #1c1a12;
  --dark2:  #2a2820;
  --accent: #d4ff00;
  --acc2:   #a8cc00;
  --max-w:  1280px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans JP', sans-serif;
  background: var(--paper);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

/* ─── nav ─── */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 200;
  display: flex; justify-content: space-between; align-items: center;
  padding: 20px clamp(24px,4vw,64px);
  transition: background .4s;
}
.nav.scrolled {
  background: rgba(28,26,18,.93);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--dark2);
}
.nav-back {
  font-family: 'DM Sans', sans-serif;
  font-size: 11px; letter-spacing: .16em; text-transform: uppercase;
  color: rgba(255,255,255,.6); text-decoration: none;
  display: flex; align-items: center; gap: 8px; transition: color .2s;
}
.nav-back:hover { color: var(--accent); }
.nav-logo {
  font-family: 'DM Sans', sans-serif;
  font-size: 11px; letter-spacing: .18em; text-transform: uppercase;
  color: rgba(255,255,255,.5); text-decoration: none;
}

/* ─── hero ─── */
.hero {
  position: relative; width: 100%;
  height: 100vh; min-height: 600px; max-height: 860px;
  background: var(--dark); overflow: hidden;
}
.hero-img {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
}
.hero-img-hint { display: flex; flex-direction: column; align-items: center; gap: 12px; opacity: .15; }
.hero-img-hint svg { width: 60px; height: 60px; }
.hero-img-hint span { font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: #888; }
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(10,8,2,.82) 0%, rgba(10,8,2,.55) 45%, rgba(10,8,2,.3) 100%);
}
.hero-bar { position: absolute; left: 0; top: 0; bottom: 0; width: 6px; background: var(--accent); z-index: 2; }
.hero-bg-num {
  position: absolute; bottom: -0.1em; right: -0.02em;
  font-family: 'Anton', sans-serif;
  font-size: clamp(200px, 30vw, 420px);
  color: rgba(255,255,255,.03); line-height: 1;
  pointer-events: none; z-index: 1;
}
.hero-content {
  position: absolute; bottom: 0; left: 0; right: 0; z-index: 3;
  padding: 0 clamp(36px,5vw,100px) 56px clamp(44px,6vw,100px);
}
.hero-eyebrow {
  font-family: 'DM Sans', sans-serif;
  font-size: 11px; letter-spacing: .28em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 20px;
  display: flex; align-items: center; gap: 16px;
}
.hero-eyebrow::before { content: ''; width: 40px; height: 1px; background: var(--accent); }
.hero-title {
  font-family: 'Anton', sans-serif;
  font-size: clamp(48px, 7vw, 100px);
  letter-spacing: .04em; text-transform: uppercase;
  color: #fff; line-height: .92; margin-bottom: 32px;
}
.hero-meta {
  display: flex; align-items: center; gap: 32px; flex-wrap: wrap;
}
.hero-meta-item { display: flex; flex-direction: column; gap: 4px; }
.hero-meta-label {
  font-family: 'DM Sans', sans-serif;
  font-size: 10px; letter-spacing: .2em; text-transform: uppercase; color: rgba(255,255,255,.35);
}
.hero-meta-val {
  font-family: 'DM Sans', sans-serif;
  font-size: 13px; font-weight: 400; color: rgba(255,255,255,.7);
}
.hero-scroll {
  position: absolute; bottom: 32px; right: clamp(36px,5vw,100px); z-index: 4;
  font-family: 'DM Sans', sans-serif; font-size: 10px; letter-spacing: .22em; text-transform: uppercase;
  color: rgba(255,255,255,.25); display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.hero-scroll-line { width: 1px; height: 40px; background: rgba(255,255,255,.2); animation: scrollLine 1.8s ease-in-out infinite; }
@keyframes scrollLine { 0%,100%{transform:scaleY(1);opacity:.3} 50%{transform:scaleY(.4);opacity:.8} }

/* ─── overview ─── */
.overview {
  width: 100%; background: var(--dark);
  padding: 100px clamp(24px,4vw,64px);
}
.overview-inner {
  max-width: var(--max-w); margin-inline: auto;
  display: grid; grid-template-columns: 1fr 1fr; gap: 80px; align-items: start;
}
.overview-left {}
.overview-eyebrow {
  font-family: 'DM Sans', sans-serif; font-size: 11px; letter-spacing: .28em; text-transform: uppercase;
  color: #888076; margin-bottom: 28px; display: flex; align-items: center; gap: 16px;
}
.overview-eyebrow::after { content: ''; flex: 1; max-width: 60px; height: 1px; background: #888076; }
.overview-lead {
  font-family: 'Anton', sans-serif;
  font-size: clamp(36px, 4vw, 56px); letter-spacing: .04em; text-transform: uppercase;
  color: #fff; line-height: 1.05; margin-bottom: 32px;
}
.overview-lead span { color: var(--accent); }
.overview-text { font-size: 16px; font-weight: 400; line-height: 1.95; color: rgba(255,255,255,.6); }
.overview-right {}
.spec-list { display: flex; flex-direction: column; border: 1px solid #2a2820; }
.spec-item {
  padding: 22px 28px; border-bottom: 1px solid #2a2820;
  display: grid; grid-template-columns: 120px 1fr; gap: 16px; align-items: baseline;
}
.spec-item:last-child { border-bottom: none; }
.spec-label {
  font-family: 'DM Sans', sans-serif; font-size: 10px; letter-spacing: .18em; text-transform: uppercase;
  color: #888076;
}
.spec-val { font-size: 15px; font-weight: 400; color: rgba(255,255,255,.75); }
.spec-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.spec-tag {
  font-family: 'DM Sans', sans-serif; font-size: 11px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--acc2); border: 1px solid #3a3820; padding: 4px 12px; border-radius: 2px;
}

/* ─── main visual: 2-column layout ─── */
.main-visual {
  width: 100%;
  background: var(--paper2);
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 480px;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.main-visual-img {
  background: var(--paper3);
  display: flex; align-items: center; justify-content: center;
  overflow: hidden; padding: 48px clamp(20px,4vw,64px);
  border-right: 1px solid var(--border);
}
.main-visual-img img {
  max-width: 100%; height: auto; display: block;
}
.main-visual-info {
  padding: 56px clamp(28px,4vw,64px);
  display: flex; flex-direction: column; justify-content: center; gap: 20px;
  background: var(--paper);
}
.main-visual-label {
  font-family: 'DM Sans', sans-serif;
  font-size: 11px; letter-spacing: .24em; text-transform: uppercase;
  color: var(--ink3);
}
.main-visual-title {
  font-family: 'Anton', sans-serif;
  font-size: clamp(28px, 3vw, 44px); letter-spacing: .04em;
  color: var(--ink); line-height: 1.1;
}
.main-visual-desc {
  font-size: 15px; font-weight: 400; line-height: 1.9;
  color: var(--ink2);
}
.main-visual-link {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: 'DM Sans', sans-serif; font-size: 12px; letter-spacing: .14em;
  text-transform: uppercase; color: var(--ink2);
  border-bottom: 1px solid var(--border); padding-bottom: 2px;
  text-decoration: none; width: fit-content; transition: color .2s;
}
.main-visual-link:hover { color: var(--ink); }

/* visual-placeholder (fallback) */
.visual-placeholder {
  display: flex; flex-direction: column; align-items: center; gap: 16px; opacity: .4;
}
.visual-placeholder svg { width: 64px; height: 64px; }
.visual-placeholder span { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--ink3); }

/* ─── points section ─── */
.points-sec { width: 100%; background: var(--paper); }
.points-header {
  max-width: var(--max-w); margin-inline: auto;
  padding: 100px clamp(24px,4vw,64px) 64px;
}
.points-eyebrow {
  font-family: 'DM Sans', sans-serif; font-size: 11px; letter-spacing: .28em; text-transform: uppercase;
  color: var(--ink3); margin-bottom: 24px; display: flex; align-items: center; gap: 16px;
}
.points-eyebrow::after { content: ''; flex: 1; max-width: 60px; height: 1px; background: var(--border); }
.points-lead {
  font-family: 'Anton', sans-serif;
  font-size: clamp(52px, 7vw, 96px); letter-spacing: .03em; text-transform: uppercase;
  color: var(--ink); line-height: .9;
}
.points-lead span { color: var(--acc2); }

.point-item {
  width: 100%;
  display: grid; grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--border); min-height: 480px;
}
.point-item.flip { direction: rtl; }
.point-item.flip > * { direction: ltr; }

.point-img {
  background: var(--paper3);
  display: flex; align-items: center; justify-content: center;
  position: relative; overflow: hidden; min-height: 400px;
  transition: background .3s;
}
.point-img:hover { background: #d0cdb8; }
.point-img-placeholder { font-size: 11px; letter-spacing: .1em; text-transform: uppercase; color: var(--ink3); }
.point-num {
  position: absolute; bottom: -0.05em; right: -0.02em;
  font-family: 'Anton', sans-serif; font-size: clamp(80px, 14vw, 160px);
  color: rgba(0,0,0,.06); line-height: 1; pointer-events: none;
}

.point-text {
  padding: 60px 64px;
  display: flex; flex-direction: column; justify-content: center; gap: 20px;
  border-left: 1px solid var(--border);
}
.point-item.flip .point-text { border-left: none; border-right: 1px solid var(--border); }
.point-idx {
  font-family: 'Bebas Neue', sans-serif; font-size: 14px; letter-spacing: .2em; color: var(--border);
}
.point-title {
  font-family: 'Anton', sans-serif;
  font-size: clamp(28px, 3.5vw, 48px); letter-spacing: .04em; color: var(--ink); line-height: 1.1;
}
.point-body { font-size: 16px; font-weight: 400; line-height: 1.95; color: var(--ink2); max-width: 380px; }

/* ─── results ─── */
.results-sec {
  width: 100%; background: var(--dark);
  padding: 100px clamp(24px,4vw,64px);
}
.results-inner { max-width: var(--max-w); margin-inline: auto; }
.results-eyebrow {
  font-family: 'DM Sans', sans-serif; font-size: 11px; letter-spacing: .28em; text-transform: uppercase;
  color: #888076; margin-bottom: 28px; display: flex; align-items: center; gap: 16px;
}
.results-eyebrow::after { content: ''; flex: 1; max-width: 60px; height: 1px; background: #888076; }
.results-lead {
  font-family: 'Anton', sans-serif;
  font-size: clamp(52px, 7vw, 96px); letter-spacing: .03em; text-transform: uppercase;
  color: #fff; line-height: .9; margin-bottom: 72px;
}
.results-lead span { color: var(--accent); }
.results-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 0; border: 1px solid #2a2820; }
.result-item {
  padding: 40px 36px; border-right: 1px solid #2a2820;
  display: flex; flex-direction: column; gap: 12px;
}
.result-item:last-child { border-right: none; }
.result-num {
  font-family: 'Bebas Neue', sans-serif;
  font-size: clamp(56px, 7vw, 96px); letter-spacing: .02em; color: var(--accent); line-height: 1;
}
.result-label { font-size: 15px; font-weight: 400; color: rgba(255,255,255,.6); line-height: 1.7; }

/* ─── nav between works ─── */
.works-nav {
  width: 100%; background: var(--dark);
  border-top: 1px solid #2a2820;
  display: grid; grid-template-columns: 1fr 1fr;
}
.works-nav-item {
  padding: 48px clamp(28px,4vw,64px);
  display: flex; flex-direction: column; gap: 10px;
  text-decoration: none; transition: background .2s;
}
.works-nav-item:hover { background: #2a2820; }
.works-nav-item + .works-nav-item { border-left: 1px solid #2a2820; }
.works-nav-dir {
  font-family: 'DM Sans', sans-serif; font-size: 10px; letter-spacing: .2em; text-transform: uppercase;
  color: #888076;
}
.works-nav-title {
  font-family: 'Anton', sans-serif;
  font-size: clamp(20px, 2.5vw, 32px); letter-spacing: .04em; text-transform: uppercase;
  color: #fff; transition: color .2s;
}
.works-nav-item:hover .works-nav-title { color: var(--accent); }
.works-nav-item.next { align-items: flex-end; text-align: right; }

/* ─── footer ─── */
.site-footer {
  width: 100%; border-top: 1px solid var(--dark2);
  padding: 22px clamp(24px,4vw,64px);
  display: flex; align-items: center; justify-content: center;
  background: var(--dark);
}
.footer-copy { font-family: 'Bebas Neue', sans-serif; font-size: 16px; letter-spacing: .22em; color: #888076; }

/* ─── reveal ─── */
.reveal { animation: fadeUp .8s cubic-bezier(.16,1,.3,1) both; }
@keyframes fadeUp { from { opacity:0; transform:translateY(24px); } to { opacity:1; transform:translateY(0); } }

/* ─── responsive ─── */
@media (max-width: 1024px) {
  .overview-inner { gap: 48px; }
  .main-visual { grid-template-columns: 1fr; }
  .main-visual-img { border-right: none; border-bottom: 1px solid var(--border); min-height: 320px; }
}

@media (max-width: 768px) {
  /* 横スクロール根絶 */
  html, body { overflow-x: hidden; max-width: 100vw; }

  /* hero */
  .hero { max-height: none; overflow: hidden; }
  .hero-bg-num { font-size: clamp(100px, 32vw, 180px); right: -0.05em; }
  .hero-title { font-size: clamp(28px, 7.5vw, 52px); letter-spacing: .02em; }
  .hero-content { padding: 0 20px 40px 24px; }
  .hero-meta { gap: 16px; flex-wrap: wrap; }
  .hero-eyebrow { font-size: 10px; }

  /* overview */
  .overview { padding: 56px 20px; }
  .overview-inner { grid-template-columns: 1fr; gap: 36px; }
  .overview-lead { font-size: clamp(26px, 7vw, 44px); white-space: normal; }
  .spec-item { grid-template-columns: 1fr; gap: 6px; }

  /* main visual — スマホは縦積み */
  .main-visual { grid-template-columns: 1fr; }
  .main-visual-img {
    border-right: none;
    border-bottom: 1px solid var(--border);
    padding: 28px 20px;
    min-height: 220px;
  }
  .main-visual-img img { max-width: 100%; }
  .main-visual-info { padding: 32px 20px; }
  .main-visual-title { font-size: clamp(22px, 6vw, 36px); }

  /* points */
  .points-header { padding: 56px 20px 36px; }
  .points-lead {
    font-size: clamp(36px, 10vw, 64px);
    white-space: normal;
    word-break: keep-all;
    overflow-wrap: break-word;
  }
  .point-item, .point-item.flip { grid-template-columns: 1fr; direction: ltr; }
  .point-img { min-height: 200px; }
  .point-text { padding: 28px 20px; border-left: none !important; border-right: none !important; border-top: 1px solid var(--border); }

  /* results */
  .results-sec { padding: 56px 20px; }
  .results-lead {
    font-size: clamp(36px, 10vw, 64px);
    white-space: normal;
    word-break: keep-all;
    overflow-wrap: break-word;
    margin-bottom: 36px;
  }
  .results-grid { grid-template-columns: 1fr; }
  .result-item { border-right: none; border-bottom: 1px solid #2a2820; padding: 32px 20px; }
  .result-item:last-child { border-bottom: none; }
  .result-num { font-size: clamp(44px, 11vw, 72px); }
  .result-label { font-size: 13px; }

  /* works nav */
  .works-nav { grid-template-columns: 1fr; }
  .works-nav-item + .works-nav-item { border-left: none; border-top: 1px solid #2a2820; }
  .works-nav-item.next { align-items: flex-start; text-align: left; }

  /* nav */
  .nav-back, .nav-logo { font-size: 10px; letter-spacing: .12em; }
}