:root{
  --bg:#f5f2ee;
  --surface:#ffffff;
  --ink:#171718;
  --muted:#66636a;
  --line:#ddd7d0;
  --red:#a5151d;
  --red-dark:#721015;
  --red-soft:#f5e8e8;
  --black:#111113;
  --cream:#f8f5f1;
  --max:1180px;
  --radius:20px;
  --shadow:0 18px 55px rgba(20,16,16,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--ink);
  background:var(--bg);
  font-family:"Noto Sans JP","Yu Gothic UI","Yu Gothic","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;
  line-height:1.85;
  letter-spacing:.02em;
}
a{color:inherit}
button,input{font:inherit}
.container{width:min(calc(100% - 40px),var(--max));margin-inline:auto}
.skip-link{
  position:fixed;left:16px;top:-80px;z-index:9999;
  padding:10px 16px;background:#fff;color:#111;border:2px solid #111;border-radius:8px
}
.skip-link:focus{top:16px}

.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(245,242,238,.92);
  border-bottom:1px solid rgba(0,0,0,.08);
  backdrop-filter:blur(16px)
}
.header-inner{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:inline-flex;align-items:center;gap:12px;text-decoration:none;font-weight:800}
.brand-mark{
  width:36px;height:36px;display:grid;place-items:center;
  color:#fff;background:var(--red);border-radius:9px;font-weight:900
}
.header-nav{display:flex;align-items:center;gap:22px;font-size:14px;font-weight:700}
.header-nav a{text-decoration:none}
.header-nav a:not(.header-cta):hover{text-decoration:underline}
.header-cta{padding:10px 17px;border-radius:999px;color:#fff;background:var(--black)}
.header-cta:hover{background:var(--red)}

.breadcrumb{padding-top:24px}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0;margin:0;color:#777;font-size:12px}
.breadcrumb li+li::before{content:"/";margin-right:8px;color:#aaa}
.breadcrumb a{text-underline-offset:3px}

.hero{padding:58px 0 74px}
.hero-grid{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(320px,.8fr);gap:72px;align-items:center}
.eyebrow,.section-kicker{
  margin:0 0 14px;color:var(--red);font-size:12px;font-weight:900;letter-spacing:.18em
}
.hero h1,.section h2{
  margin:0;line-height:1.16;letter-spacing:-.035em
}
.hero h1{font-size:clamp(46px,7vw,88px)}
.hero h1 span{color:var(--red)}
.hero-date{margin:22px 0 12px;font-weight:800;font-size:18px}
.hero-copy{max-width:760px;margin:0;color:#444;font-size:16px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:50px;padding:0 22px;border:1px solid var(--black);border-radius:999px;
  font-weight:800;text-decoration:none;transition:.2s ease
}
.btn:hover{transform:translateY(-2px)}
.btn-primary{background:var(--black);color:#fff}
.btn-primary:hover{background:var(--red);border-color:var(--red)}
.btn-secondary{background:transparent}
.btn-secondary:hover{background:#fff}
.btn-light{background:#fff;color:#111;border-color:#fff}
.btn-light:hover{background:var(--red-soft);border-color:var(--red-soft)}
.text-link{font-weight:800;text-underline-offset:4px}

.deadline-card{
  position:relative;overflow:hidden;
  padding:36px;border:1px solid #d9d1ca;border-radius:var(--radius);
  background:linear-gradient(145deg,#fff 0%,#f9f2f2 100%);box-shadow:var(--shadow)
}
.deadline-card::after{
  content:"";position:absolute;width:180px;height:180px;border:42px solid rgba(165,21,29,.06);
  border-radius:50%;right:-65px;top:-70px
}
.deadline-label{display:block;color:var(--muted);font-size:12px;font-weight:800;letter-spacing:.12em}
.deadline-card>strong{display:block;margin:6px 0 4px;font-size:clamp(32px,4.7vw,58px);line-height:1.1;color:var(--red)}
.countdown{margin:20px 0 12px;padding:10px 14px;border-radius:12px;background:var(--black);color:#fff;font-weight:800}
.deadline-card p{position:relative;z-index:1;margin-bottom:0;color:#565158;font-size:14px}

.notice{background:var(--red);color:#fff}
.notice-inner{min-height:78px;display:flex;align-items:center;gap:22px}
.notice-inner span{
  flex:0 0 auto;padding:5px 10px;border:1px solid rgba(255,255,255,.55);
  border-radius:999px;font-size:12px;font-weight:900
}
.notice-inner p{margin:0;font-weight:700}

.section{padding:98px 0}
.section:nth-of-type(even){background:rgba(255,255,255,.32)}
.section-head{display:grid;grid-template-columns:minmax(280px,.82fr) minmax(0,1.18fr);gap:70px;align-items:start;margin-bottom:48px}
.section h2{font-size:clamp(34px,5vw,62px)}
.section-copy{max-width:680px;color:#555}
.section-copy p:first-child{margin-top:0}

.deadline-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}
.deadline-grid article{padding:28px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);background:rgba(255,255,255,.56)}
.deadline-grid span{display:block;color:var(--red);font-size:12px;font-weight:900}
.deadline-grid small{display:block;margin:14px 0 4px;color:#666;font-weight:700}
.deadline-grid strong{font-size:clamp(24px,3vw,38px);letter-spacing:-.03em}
.deadline-grid .deadline-emphasis{background:var(--red);color:#fff}
.deadline-grid .deadline-emphasis span,.deadline-grid .deadline-emphasis small{color:#fff}

.progress-wrap{margin-top:26px}
.progress-head{display:flex;justify-content:space-between;font-size:13px;font-weight:800}
.progress-bar{height:8px;margin-top:8px;border-radius:999px;background:#ded8d2;overflow:hidden}
.progress-bar span{display:block;width:0;height:100%;background:var(--red);transition:width .25s ease}

.interactive-checklist{border-top:1px solid var(--line)}
.check-item{
  display:grid;grid-template-columns:32px 1fr;gap:18px;align-items:start;
  padding:26px 4px;border-bottom:1px solid var(--line);cursor:pointer
}
.check-item input{position:absolute;opacity:0;pointer-events:none}
.check-box{
  width:26px;height:26px;margin-top:4px;border:1.5px solid #aaa;border-radius:7px;background:#fff;
  transition:.18s ease
}
.check-item input:checked+.check-box{background:var(--red);border-color:var(--red);box-shadow:inset 0 0 0 6px var(--red)}
.check-item input:checked+.check-box::after{
  content:"✓";display:block;color:#fff;font-size:17px;line-height:23px;text-align:center;font-weight:900
}
.check-item strong{display:block;font-size:20px}
.check-item small{display:block;margin-top:4px;color:#666;font-size:14px;line-height:1.75}
.check-item:hover .check-box{border-color:var(--red)}

.warning-section{background:#ece6df!important}
.warning-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:70px;align-items:start}
.warning-card{padding:34px;border-left:4px solid var(--red);background:#fff;box-shadow:var(--shadow)}
.warning-card strong{font-size:21px}
.warning-card .muted{color:#6c6764;font-size:13px}

.decision-grid,.choice-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.decision-grid article,.choice-grid article{
  min-height:240px;padding:28px;border:1px solid var(--line);border-radius:16px;background:#fff
}
.decision-grid span,.choice-grid span{display:block;color:var(--red);font-size:12px;font-weight:900}
.decision-grid h3,.choice-grid h3{margin:34px 0 10px;font-size:22px;line-height:1.35}
.decision-grid p,.choice-grid p{margin:0;color:#666;font-size:14px}

.successor-card{
  margin-top:34px;padding:34px;display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center;
  border:1px solid #d5cdc6;border-radius:var(--radius);
  background:linear-gradient(120deg,#fff 0%,#f7eded 100%);box-shadow:var(--shadow)
}
.card-label{font-size:11px;font-weight:900;letter-spacing:.17em;color:var(--red)}
.successor-card h3{margin:8px 0 10px;font-size:34px}
.successor-card p{margin:0;color:#5d5857}
.successor-actions{display:flex;flex-direction:column;align-items:flex-start;gap:16px}

.choice-grid{grid-template-columns:repeat(3,1fr)}
.choice-grid article{min-height:225px}

.consultation{background:var(--black)!important;color:#fff}
.consultation-grid{display:grid;grid-template-columns:.85fr 1.15fr;gap:72px;align-items:start}
.consultation h2{color:#fff}
.section-kicker-light{color:#e79aa0}
.consultation p{margin-top:0;color:#d6d3d3}
.consultation .btn{margin-top:16px}

.faq-list{border-top:1px solid var(--line)}
.faq-list details{border-bottom:1px solid var(--line)}
.faq-list summary{
  position:relative;list-style:none;padding:24px 52px 24px 4px;cursor:pointer;font-size:18px;font-weight:800
}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{
  content:"+";position:absolute;right:8px;top:50%;transform:translateY(-50%);
  width:30px;height:30px;display:grid;place-items:center;border:1px solid #bbb;border-radius:50%;
  font-size:20px;font-weight:400
}
.faq-list details[open] summary::after{content:"−"}
.faq-list details p{margin:0;padding:0 52px 24px 4px;color:#666}

.official{background:#fff!important}
.official-inner{max-width:900px}
.official-inner>p:not(.section-kicker):not(.updated){color:#62605f}
.official-links{display:grid;gap:10px;margin-top:30px}
.official-links a{
  display:flex;justify-content:space-between;gap:20px;padding:18px 20px;
  border:1px solid var(--line);border-radius:12px;text-decoration:none;background:#faf9f7;font-weight:800
}
.official-links a:hover{border-color:var(--red)}
.official-links span{color:var(--red);font-size:12px;white-space:nowrap}
.updated{margin-top:24px;color:#777;font-size:12px}

.site-footer{padding:42px 0;background:#0d0d0f;color:#fff}
.footer-inner{display:grid;grid-template-columns:1fr auto;gap:24px;align-items:end}
.footer-inner strong{font-size:17px}
.footer-inner p{margin:3px 0 0;color:#9f9fa5;font-size:13px}
.footer-inner nav{display:flex;gap:18px}
.footer-inner nav a{color:#ddd;font-size:13px}
.footer-inner small{grid-column:1/-1;color:#777;border-top:1px solid #28282c;padding-top:20px}

@media (max-width:900px){
  .hero-grid,.section-head,.warning-grid,.consultation-grid,.successor-card{grid-template-columns:1fr;gap:34px}
  .decision-grid{grid-template-columns:repeat(2,1fr)}
  .choice-grid{grid-template-columns:1fr}
  .deadline-grid{grid-template-columns:1fr}
  .header-nav>a:not(.header-cta){display:none}
  .hero{padding-top:42px}
  .section{padding:76px 0}
  .deadline-card{max-width:620px}
}
@media (max-width:620px){
  .container{width:min(calc(100% - 28px),var(--max))}
  .header-inner{min-height:64px}
  .brand{font-size:14px}
  .brand-mark{width:32px;height:32px}
  .header-cta{padding:8px 13px;font-size:12px}
  .breadcrumb{padding-top:16px}
  .hero{padding:34px 0 54px}
  .hero h1{font-size:43px}
  .hero-date{font-size:15px}
  .hero-copy{font-size:14px}
  .hero-actions .btn{width:100%}
  .deadline-card{padding:26px}
  .notice-inner{align-items:flex-start;flex-direction:column;gap:9px;padding:18px 0}
  .notice-inner p{font-size:13px}
  .section{padding:60px 0}
  .section-head{margin-bottom:34px}
  .section h2{font-size:35px}
  .decision-grid{grid-template-columns:1fr}
  .decision-grid article,.choice-grid article{min-height:0}
  .check-item{grid-template-columns:28px 1fr;gap:13px;padding:22px 0}
  .check-item strong{font-size:17px}
  .successor-card{padding:26px}
  .successor-card h3{font-size:29px}
  .official-links a{flex-direction:column;gap:5px}
  .official-links span{white-space:normal}
  .footer-inner{grid-template-columns:1fr}
  .footer-inner nav{flex-direction:column;gap:6px}
}
@media (prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important;transition:none!important}
}