:root{--paper:#f3f0e7;--ink:#163d32;--dark:#0d342a;--lime:#9fbd62;--rust:#984a37;--line:#d8d4c8}
*{box-sizing:border-box}
html,body{margin:0;padding:0;max-width:100%}
body{background:var(--paper);color:#263a33;font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;line-height:1.95}
img,svg,video,canvas{max-width:100%;height:auto}
.site-header{background:#fff;border-bottom:1px solid #e5e5df}
.site-inner,.shell{width:min(1280px,calc(100% - 48px));margin:auto;min-width:0}
.site-inner{min-height:88px;display:flex;align-items:center;gap:16px}
.brand{display:flex;gap:12px;align-items:center;font-size:26px;color:#111}.mark{background:#9bc33d;color:#fff;border-radius:8px;padding:2px 9px;font-weight:900}.tagline{margin-left:auto;color:#66716b;font-size:13px}
.hero{height:470px;margin-top:30px;border-radius:24px;overflow:hidden;position:relative;background:#0b2f26}
.hero-photo{position:absolute;right:0;top:0;bottom:0;width:48%;background:url("https://upload.wikimedia.org/wikipedia/commons/d/da/Akechi_Mitsuhide.jpg") center 36%/cover no-repeat}
.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(8,28,23,.99) 0%,rgba(8,28,23,.96) 42%,rgba(8,28,23,.70) 56%,rgba(8,28,23,.05) 82%)}
.hero-copy{position:absolute;z-index:2;left:62px;top:58px;color:#fff;max-width:760px}
.eyebrow{font-size:11px;font-weight:900;letter-spacing:.18em;color:#789d49;margin-bottom:12px}.light{color:#c1d98b}
h1,h2,h3,blockquote{font-family:"Yu Mincho","Hiragino Mincho ProN",serif}
.hero h1{font-size:48px;line-height:1.38;margin:0 0 22px}.hero h1 span{display:block;white-space:nowrap}.hero p{font-size:17px}.hero-credit{position:absolute;right:18px;bottom:12px;color:#fff;font-size:10px;z-index:2;text-shadow:0 1px 2px #000}
.opening,.theories,.verdict{padding:76px 0}.opening h2,.theories>h2,.timeline h2,.turn h2,.verdict h2{font-size:40px;line-height:1.45;color:var(--ink);margin:0 0 34px}
.opening-grid{display:grid;grid-template-columns:1fr 310px;gap:70px}.opening-grid>*{min-width:0}.opening p,.theory p,.turn p,.verdict p{font-size:16px;margin:0 0 18px}.lead{font-weight:800;color:#315a49}
.question-line{align-self:center;border-left:4px solid var(--lime);padding:8px 0 8px 24px}.question-line span{display:block;color:#8d7441;font-size:10px;font-weight:900;letter-spacing:.15em}.question-line b{display:block;color:var(--ink);font-family:"Yu Mincho",serif;font-size:34px;line-height:1.4;margin:8px 0}.question-line small{display:block;color:#68766f;line-height:1.7}
.dark{background:var(--dark);color:#edf3ef}.timeline{padding:70px 0}.timeline h2,.turn h2{color:#fff}.timeline-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.timeline-grid>*{min-width:0}.time{border-top:2px solid #9fbd62;padding:18px 16px 14px;background:rgba(255,255,255,.045)}.time strong{display:block;color:#c8df93;font-size:19px}.time span{font-size:13px;line-height:1.75}.note-dark{font-size:12px;color:#becbc5;margin-top:18px}
.theory{display:grid;grid-template-columns:70px 1fr 340px;gap:26px;padding:30px 0;border-top:1px solid var(--line);align-items:start}.theory>*{min-width:0}.theory:last-child{border-bottom:1px solid var(--line)}.theory-num{font-family:Georgia,serif;font-size:31px;color:#9a7755}.theory h3{font-size:30px;color:var(--ink);margin:0 0 10px}.theory-side{background:#fff;border:1px solid #deddd6;border-radius:14px;padding:20px}.theory-side b{display:block;color:#7c9950;font-size:11px;letter-spacing:.06em;margin-top:10px}.theory-side b:first-child{margin-top:0}.theory-side span{display:block;font-size:13px;line-height:1.7}
.feature-theory{grid-template-columns:210px 1fr 320px;background:#ececdf;margin:18px -22px;padding:28px 22px;border-radius:18px;border:0}.portrait-wrap img{width:100%;height:260px;object-fit:cover;object-position:center 18%;border-radius:12px}.portrait-wrap small{font-size:9px;color:#6f746e}.inline{font-size:16px;margin-bottom:2px}
.turn{padding:72px 0}.two{display:grid;grid-template-columns:1.1fr .9fr;gap:65px}.two>*{min-width:0}.lead-dark{font-weight:800;color:#cae39a!important}.opportunity{align-self:center;display:grid;grid-template-columns:1fr 34px 1fr 34px 1fr;gap:10px;align-items:center}.opportunity span{display:flex;align-items:center;justify-content:center;min-height:92px;padding:14px;text-align:center;border:1px solid rgba(255,255,255,.18);border-radius:14px;background:rgba(255,255,255,.05);font-weight:800}.opportunity i{font-style:normal;text-align:center;color:#c8df93;font-size:24px}.opportunity b{grid-column:1/-1;text-align:center;color:#c8df93;font-size:22px;padding-top:8px}
.verdict-copy{max-width:990px}.verdict blockquote{font-size:26px;line-height:1.7;color:var(--ink);border-left:4px solid var(--lime);margin:32px 0;padding:20px 26px;background:#ecefe5}
.notes{display:grid;grid-template-columns:1fr 1fr;gap:28px;padding:0 0 74px}.notes>*{min-width:0}.notes>div{background:#fff;border:1px solid #dddcd4;border-radius:16px;padding:30px}.notes h3{margin:0 0 12px;color:var(--ink);font-size:20px}.notes p,.notes li{font-size:13px;line-height:1.8}
.site-footer{background:#091a14;color:#d7e0dc}.site-footer .site-inner{min-height:110px;font-size:13px;gap:28px}.copyr{margin-left:auto}

@media(max-width:820px){
  .site-inner,.shell{width:min(100% - 28px,1280px)}
  .tagline{display:none}
  .hero{height:520px;margin-top:14px}
  .hero-photo{width:68%;left:32%;right:0;background-position:center 20%}
  .hero-shade{background:linear-gradient(90deg,rgba(8,28,23,.99),rgba(8,28,23,.92) 46%,rgba(8,28,23,.42) 78%,rgba(8,28,23,.12))}
  .hero-copy{left:24px;right:18px;top:34px;width:auto;max-width:none;min-width:0}
  .hero h1{font-size:32px;overflow-wrap:anywhere;word-break:normal}.hero h1 span{white-space:normal}
  .hero-credit{max-width:70%;text-align:right}
  .opening,.theories,.verdict{padding:52px 0}
  .opening h2,.theories>h2,.timeline h2,.turn h2,.verdict h2{font-size:30px;overflow-wrap:anywhere}
  .opening-grid,.two,.notes{grid-template-columns:1fr;gap:30px}
  .timeline-grid{grid-template-columns:1fr}
  .theory,.feature-theory{grid-template-columns:1fr;margin-left:0;margin-right:0;padding:24px 0;border-radius:0;background:transparent}
  .theory-num{font-size:19px}.theory-side{padding:18px}
  .portrait-wrap{max-width:250px}.portrait-wrap img{height:280px}
  .opportunity{grid-template-columns:1fr}
  .opportunity i{transform:rotate(90deg)}
  .opportunity b{grid-column:1}
  .verdict blockquote{font-size:21px;margin:24px 0;padding:18px 20px}
  .copyr{margin-left:0;width:100%}
}

/* Production-compatible mobile containment: preserve the V6 composition while
   allowing every grid/flex descendant and long Japanese heading to shrink. */
main,.hero,.opening,.timeline,.theories,.shikoku-focus,.hypothesis,.verdict,.notes,
main>* ,main>* > *{min-width:0;max-width:100%}
main img,main svg,main video,main canvas{max-width:100%;height:auto}
@media(max-width:820px){
  main h1,main h2,main h3,main p,main strong,main span,main blockquote,
  main li{white-space:normal;word-break:normal;overflow-wrap:anywhere}
  .hero h1 span{white-space:normal}
  .hero-copy,.hero h1,.hero p,.opening-grid,.timeline-grid,.theory-head,
  .explain-panel,.shikoku-copy,.premise-box,.relation-diagram,.shikoku-flow,
  .policy-switch,.hypothesis-grid,.verdict-copy,.notes{min-width:0;max-width:100%}
}


/* ==================================================
   V2 THEORY COMPARISON REDESIGN
   Mori visual review:
   - all five theories must be visually equal
   - no image only on theory 03
   - "what it explains" is the primary visual value
   ================================================== */

.theories-intro{
  max-width:900px;
  margin:-10px 0 42px;
  font-size:16px;
  color:#51635b;
}

.theory-equal{
  display:block;
  padding:38px 0 42px;
  border-top:1px solid var(--line);
}

.theory-equal:last-child{
  border-bottom:1px solid var(--line);
}

.theory-head{
  display:grid;
  grid-template-columns:72px 1fr;
  gap:26px;
  align-items:start;
  margin-bottom:24px;
}

.theory-head > *{
  min-width:0;
}

.theory-head .theory-num{
  font-family:Georgia,serif;
  font-size:30px;
  line-height:1;
  color:#9a7755;
  padding-top:10px;
}

.theory-head h3{
  font-size:32px;
  margin:0 0 10px;
  color:var(--ink);
}

.theory-head p{
  max-width:920px;
  margin:0 0 10px;
  font-size:16px;
}

.explain-panel{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:0;
  margin-left:98px;
  border:1px solid #d6d9cf;
  border-radius:18px;
  overflow:hidden;
  background:#fff;
  box-shadow:0 8px 24px rgba(28,52,43,.04);
}

.explain-panel > div{
  min-width:0;
  padding:26px 30px 28px;
}

.can-explain{
  background:#e8efe2;
  border-right:1px solid #d4ddcc;
}

.still-question{
  background:#f7f4ed;
}

.panel-label{
  display:block;
  margin-bottom:9px;
  font-size:12px;
  line-height:1;
  font-weight:900;
  letter-spacing:.08em;
  color:#71934b;
}

.still-question .panel-label{
  color:#9a7755;
}

.explain-panel strong{
  display:block;
  margin-bottom:10px;
  font-family:"Yu Mincho","Hiragino Mincho ProN",serif;
  color:#183f34;
  font-size:22px;
  line-height:1.55;
}

.explain-panel p{
  margin:0;
  font-size:14px;
  line-height:1.9;
  color:#455a51;
}

.explain-panel.emphasized{
  border:2px solid #9dbb68;
}

.explain-panel.emphasized .can-explain{
  background:#e1ecd7;
}

@media(max-width:820px){
  .theories-intro{
    margin-bottom:30px;
  }

  .theory-equal{
    padding:30px 0 34px;
  }

  .theory-head{
    grid-template-columns:44px 1fr;
    gap:12px;
  }

  .theory-head .theory-num{
    font-size:19px;
    padding-top:8px;
  }

  .theory-head h3{
    font-size:27px;
  }

  .explain-panel{
    margin-left:0;
    grid-template-columns:1fr;
    border-radius:15px;
  }

  .can-explain{
    border-right:0;
    border-bottom:1px solid #d4ddcc;
  }

  .explain-panel > div{
    padding:22px 20px 24px;
  }

  .explain-panel strong{
    font-size:20px;
  }
}

/* V3 */
.hero{background:#15483b}
.hero-photo{width:54%;right:0;left:auto;background-position:center 30%}
.hero-shade{background:linear-gradient(90deg,#15483b 0%,#15483b 43%,rgba(21,72,59,.96) 47%,rgba(21,72,59,.55) 55%,rgba(21,72,59,0) 68%)}
.hero-copy{display:block;max-width:720px}
.turn{display:none!important}
.hypothesis{padding:76px 0}.hypothesis h2{color:#fff;font-size:40px;line-height:1.45;margin:0 0 28px}
.hypothesis-intro{max-width:900px;margin:0 0 34px;color:#e4ece8;font-size:16px}
.hypothesis-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.hypothesis-grid>*{min-width:0}
.hypo-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);border-radius:18px;padding:26px 24px 28px}
.hypo-card.key{background:rgba(177,205,117,.10);border-color:rgba(190,219,132,.50)}
.hypo-num{display:block;color:#bfd789;font-family:Georgia,serif;font-size:16px;margin-bottom:10px}
.hypo-card h3{color:#fff;font-size:23px;line-height:1.55;margin:0 0 18px}
.hypo-card p{color:#e2ebe6;font-size:14px;line-height:1.9;margin:0 0 14px}.hypo-lead{color:#cce49a!important;font-weight:800}
.final-line{font-weight:800;color:#173f34;font-size:18px!important;padding-top:8px}
.verdict h2{font-size:42px}.verdict blockquote{font-size:25px;line-height:1.75;background:#e8ede2;border-left-color:#94b85b}
@media(max-width:820px){
.hero-photo{width:70%;left:30%;right:0;background-position:center 20%}
.hero-shade{background:linear-gradient(90deg,#15483b 0%,rgba(21,72,59,.96) 35%,rgba(21,72,59,.62) 58%,rgba(21,72,59,.16) 84%)}
.hypothesis{padding:52px 0}.hypothesis h2{font-size:30px;overflow-wrap:anywhere;word-break:normal}.hypothesis-grid{grid-template-columns:1fr}.hypo-card h3{font-size:21px}.verdict h2{font-size:31px}}


/* ==================================================
   V4 SHIKOKU EXPLAINER
   ================================================== */

.theories>h2 .pretitle{
  display:block;
  font-family:-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;
  font-size:15px;
  line-height:1.5;
  letter-spacing:.02em;
  color:#6f8950;
  margin-bottom:8px;
  font-weight:800;
}

.shikoku-focus{
  padding:82px 0 86px;
}

.shikoku-focus>h2{
  font-size:40px;
  line-height:1.45;
  color:var(--ink);
  margin:0 0 30px;
}

.shikoku-visual{
  margin:0 0 34px;
}

.shikoku-visual img{
  width:100%;
  display:block;
  border-radius:20px;
  aspect-ratio: 16 / 7.6;
  object-fit:cover;
}

.image-note{
  margin:8px 2px 0;
  font-size:10px;
  color:#7a817c;
}

.shikoku-copy{
  max-width:1080px;
}

.shikoku-copy>p{
  font-size:16px;
  margin:0 0 28px;
}

.shikoku-flow{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:16px;
  margin:26px 0 30px;
}

.shikoku-flow>*{
  min-width:0;
}

.flow-step{
  background:#fff;
  border:1px solid #dbddd5;
  border-radius:16px;
  padding:24px 22px 26px;
}

.flow-step>span{
  display:block;
  font-family:Georgia,serif;
  color:#9b7958;
  font-size:16px;
  margin-bottom:8px;
}

.flow-step h3{
  color:var(--ink);
  font-size:22px;
  line-height:1.55;
  margin:0 0 12px;
}

.flow-step p{
  margin:0;
  font-size:14px;
  line-height:1.9;
  color:#465a51;
}

.shikoku-point{
  border-left:4px solid #95b75d;
  background:#e9eee3;
  padding:24px 28px;
}

.shikoku-point strong{
  display:block;
  color:#173f34;
  font-size:19px;
  line-height:1.65;
  margin-bottom:10px;
}

.shikoku-point p{
  margin:0;
  font-size:15px;
  line-height:1.9;
}

@media(max-width:820px){
  .theories>h2 .pretitle{
    font-size:13px;
    margin-bottom:6px;
  }

  .shikoku-focus{
    padding:54px 0 58px;
  }

  .shikoku-focus>h2{
    font-size:30px;
    overflow-wrap:anywhere;
    word-break:normal;
  }

  .shikoku-visual img{
    border-radius:14px;
    aspect-ratio: 4 / 3;
  }

  .shikoku-flow{
    grid-template-columns:1fr;
  }

  .flow-step{
    padding:21px 18px 23px;
  }

  .flow-step h3{
    font-size:20px;
  }

  .shikoku-point{
    padding:20px 18px;
  }
}


/* V5 Mori visual UAT: Shikoku image size correction */
.shikoku-visual{
  max-width:980px;
  margin:0 auto 34px;
}
.shikoku-visual img{
  width:100%;
  height:340px;
  aspect-ratio:auto;
  object-fit:cover;
  object-position:center 50%;
}
.shikoku-visual .image-note{
  text-align:right;
}

@media(max-width:820px){
  .shikoku-visual{
    max-width:100%;
    margin-bottom:28px;
  }
  .shikoku-visual img{
    height:230px;
    aspect-ratio:auto;
    object-fit:cover;
  }
}


/* V5 rebuild: detailed Shikoku policy explanation */
.timeline-detail{
  grid-template-columns:repeat(2,1fr);
}

.policy-switch{
  display:grid;
  grid-template-columns:1fr 70px 1fr;
  gap:16px;
  align-items:center;
  margin:28px 0 30px;
}

.policy-switch>div{
  min-width:0;
  border-radius:16px;
  padding:24px 22px;
  border:1px solid #d7ddd1;
}

.policy-old{
  background:#eef3ea;
}

.policy-new{
  background:#f1ece4;
}

.policy-switch span{
  display:block;
  font-size:12px;
  font-weight:900;
  color:#789552;
  margin-bottom:8px;
}

.policy-new span{
  color:#9a7755;
}

.policy-switch strong{
  display:block;
  color:#173f34;
  font-size:20px;
  line-height:1.55;
}

.policy-switch i{
  text-align:center;
  font-style:normal;
  font-size:34px;
  color:#89a95c;
}

@media(max-width:820px){
  .timeline-detail{
    grid-template-columns:1fr;
  }

  .policy-switch{
    grid-template-columns:1fr;
  }

  .policy-switch i{
    transform:rotate(90deg);
  }

  .policy-switch strong{
    font-size:18px;
  }
}


/* V6: Shikoku policy premise + relation diagram */
.premise-box{
  background:#fff;
  border:1px solid #d8ddd4;
  border-radius:18px;
  padding:28px 30px;
  margin:0 0 26px;
}

.premise-label{
  display:block;
  color:#7b9851;
  font-size:12px;
  font-weight:900;
  letter-spacing:.08em;
  margin-bottom:8px;
}

.premise-box h3{
  margin:0 0 14px;
  color:#173f34;
  font-size:24px;
  line-height:1.55;
}

.premise-box p{
  margin:0 0 12px;
  font-size:15px;
  line-height:1.9;
}

.premise-box p:last-child{
  margin-bottom:0;
}

.relation-diagram{
  display:grid;
  grid-template-columns:1fr 190px 1fr;
  gap:18px;
  align-items:center;
  margin:26px 0 34px;
}

.relation-diagram>*{
  min-width:0;
}

.relation-box{
  background:#eef2e9;
  border:1px solid #d9dfd1;
  border-radius:16px;
  padding:22px 18px;
  text-align:center;
}

.relation-box span{
  display:block;
  color:#789552;
  font-size:12px;
  font-weight:900;
  margin-bottom:6px;
}

.relation-box strong{
  display:block;
  color:#173f34;
  font-size:19px;
  line-height:1.55;
}

.relation-arrow{
  position:relative;
  text-align:center;
  color:#173f34;
}

.relation-arrow:before,
.relation-arrow:after{
  content:"";
  position:absolute;
  top:50%;
  width:34%;
  height:2px;
  background:#92ad67;
}

.relation-arrow:before{left:0}
.relation-arrow:after{right:0}

.relation-arrow b{
  position:relative;
  z-index:1;
  display:inline-block;
  background:var(--paper);
  padding:0 10px;
  font-size:16px;
}

.relation-arrow small{
  display:block;
  font-size:11px;
  color:#718078;
  margin-top:4px;
}

.transition-lead{
  font-family:"Yu Mincho","Hiragino Mincho ProN",serif;
  font-size:25px!important;
  color:#173f34;
  font-weight:800;
  margin:8px 0 24px!important;
}

@media(max-width:820px){
  .premise-box{
    padding:22px 18px;
  }

  .premise-box h3{
    font-size:21px;
  }

  .relation-diagram{
    grid-template-columns:1fr;
    gap:12px;
  }

  .relation-arrow{
    padding:12px 0;
  }

  .relation-arrow:before,
  .relation-arrow:after{
    display:none;
  }

  .relation-arrow:after{
    content:"↓";
  }

  .transition-lead{
    font-size:22px!important;
  }
}