*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#eef4f6;color:#173344;font-family:"Yu Gothic UI","Meiryo",system-ui,sans-serif}.hero{background:linear-gradient(135deg,#07384c,#0c6680);color:#fff}.hero-inner{max-width:1220px;margin:auto;padding:38px 20px;display:grid;grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:24px}.badge{display:inline-block;background:#ffffff20;border:1px solid #ffffff40;border-radius:999px;padding:6px 11px;font-size:12px;font-weight:800}.hero h1{font-size:clamp(34px,5vw,58px);line-height:1;margin:15px 0 12px}.hero h1 span{font-size:.55em;opacity:.86}.hero p{max-width:760px;line-height:1.7;margin:0}.back{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;background:#f3b72c;color:#292413;padding:12px 18px;border-radius:12px;font-weight:900;box-shadow:0 8px 18px #0025;white-space:nowrap}
.hero-inner>div:first-child{min-width:0}
.rule-nav{display:flex;align-items:center;justify-content:flex-end;gap:12px;flex-wrap:nowrap}
.rule-nav .back{padding:12px 16px;font-size:14px}
.rule-nav .second-rule{background:#f3b72c;color:#292413}
.bottom-nav{justify-content:center;flex-wrap:wrap;margin-top:20px}
main{max-width:1220px;margin:22px auto 60px;padding:0 16px;display:grid;gap:16px}.panel{background:#fff;border:1px solid #cfdee4;border-radius:20px;padding:28px;box-shadow:0 10px 25px #1733440e}.panel h2{margin:0 0 18px;color:#0b516a;font-size:25px}.first{border-top:5px solid #f3b72c}.three{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.big-rule{border:1px solid #d7e5ea;border-radius:16px;padding:18px;background:#f8fbfc;text-align:center}.big-rule .icon{font-size:31px;color:#c28700;letter-spacing:4px;font-weight:900}.big-rule .icon.action{color:#0e7490}.big-rule .icon.slots{color:#7c3aed}.big-rule h3{margin:9px 0 5px}.big-rule p{margin:0;line-height:1.5;font-size:14px;color:#536a76}.board-demo{border:2px solid #b9d1da;border-radius:18px;overflow:hidden;background:#eef7f9}.scorebar{display:grid;grid-template-columns:1fr 1fr 1fr;align-items:center;text-align:center;background:#0b536c;color:#fff;padding:12px;gap:8px}.scorebar strong{background:#fff;color:#173344;border-radius:12px;padding:7px}.mission{display:flex;align-items:center;gap:13px;background:#fff4ce;border-bottom:1px solid #ead79c;padding:10px 14px}.mission b{background:#c48900;color:#fff;padding:5px 9px;border-radius:8px}.mission em{margin-left:auto;font-style:normal;font-weight:900;color:#966500}.zone{min-height:150px;display:flex;gap:10px;justify-content:center;align-items:center;padding:28px 12px 12px;position:relative}.zone.cpu{background:#e9eef0}.zone label,.hand-zone label{position:absolute;left:12px;top:8px;font-size:12px;font-weight:900;color:#486571}.mini-back,.mini-card{width:92px;height:118px;border-radius:10px}.mini-back{background:repeating-linear-gradient(45deg,#0b536c,#0b536c 8px,#176f89 8px,#176f89 16px);border:3px solid #fff;box-shadow:0 3px 10px #0022}.mini-card.blank{border:2px dashed #9ab8c3;background:#fff;display:grid;place-items:center;color:#79939e}.center{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;padding:10px;background:#fff;border-block:1px solid #cfdfe5}.center button{border:0;padding:7px 10px;border-radius:8px;background:#dbeaf0}.hand-zone{position:relative;min-height:178px;padding:34px 12px 12px;display:flex;gap:10px;overflow:auto;background:#f5f0ff}.visual-card{width:125px;flex:0 0 125px;border:2px solid #a9c6d2;border-radius:12px;background:#fff;overflow:hidden;box-shadow:0 5px 12px #0032}.visual-card img{width:100%;height:78px;object-fit:cover;display:block;background:#dbeef3}.visual-card b,.visual-card small,.visual-card em{display:block;padding:4px 7px}.visual-card b{font-size:12px}.visual-card small{font-size:10px;color:#59717d}.visual-card em{font-size:11px;color:#9b6b00;font-style:normal;font-weight:900}.visual-card.large{width:175px;flex-basis:175px}.visual-card.large img{height:112px}.visual-card.large b{font-size:14px}.callouts{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:12px}.callouts span{background:#eaf5f8;border-radius:10px;padding:10px;font-size:13px;font-weight:800}.flow{display:flex;align-items:stretch;justify-content:space-between;gap:8px;overflow:auto}.flow>div{min-width:160px;flex:1;background:#f7fbfc;border:1px solid #d6e6ec;border-radius:14px;padding:14px}.flow i{display:grid;place-items:center;width:28px;height:28px;background:#0e7490;color:#fff;border-radius:50%;font-style:normal;font-weight:900}.flow b,.flow small{display:block;margin-top:8px}.flow small{color:#607985;line-height:1.45}.flow>span{align-self:center;color:#0e7490;font-size:22px;font-weight:900}.lead{line-height:1.8;color:#445e6b}.accent-blue{border-left:6px solid #0e7490}.accent-gold{border-left:6px solid #d39a12}.accent-purple{border-left:6px solid #7c3aed}.chain-row,.link-stage,.mood-scene{display:flex;align-items:center;justify-content:center;gap:15px;overflow:auto;padding:15px;background:#f5fafb;border-radius:16px}.arrow{text-align:center;font-size:31px;color:#0e7490;font-weight:900}.arrow span{display:block;font-size:11px;color:#567;font-weight:700}.bonus{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}.bonus>div{display:flex;justify-content:space-between;align-items:center;background:#fff5d6;border:1px solid #ead79c;border-radius:12px;padding:13px}.warn{background:#fff2ef;border-left:4px solid #c2410c;border-radius:9px;padding:12px 14px;margin-top:14px;line-height:1.6}.link-line{min-width:120px;text-align:center;position:relative}.link-line:before{content:"";display:block;height:6px;background:#e6a700;border-radius:99px}.link-line b{display:inline-block;margin-top:-18px;background:#e6a700;padding:5px 10px;border-radius:99px;color:#3b2b00}.link-line span{display:block;font-size:11px;margin-top:7px}.explain-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}.explain-grid>div{background:#f8fbfc;border:1px solid #dbe8ed;border-radius:12px;padding:14px}.explain-grid p{margin:5px 0 0;color:#536a76}.reward-strip{text-align:center;background:#fff6d9;padding:12px;border-radius:12px}.today,.prize{min-width:170px;text-align:center;padding:20px;border-radius:14px;background:#fff;border:1px solid #d6e5ea}.today strong,.prize strong{font-size:20px}.equals{font-size:28px;font-weight:900}.moods{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin-top:12px}.moods span{background:#edf6f8;border:1px solid #d6e5ea;border-radius:10px;padding:10px;text-align:center;font-weight:800;font-size:13px}.mission-demo{display:grid;grid-template-columns:1fr auto auto;align-items:center;gap:12px;background:#fff7dd;border:1px solid #efd991;border-radius:14px;padding:16px}.mission-demo>div:first-child{display:flex;flex-direction:column}.mission-demo span{font-weight:900;color:#087f5b}.star-pop{font-size:25px;color:#bd8200;font-weight:1000}.mission-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:10px}.mission-cards article{background:#f8fbfc;border:1px solid #dce8ed;border-radius:12px;padding:12px}.mission-cards p{margin:4px 0 0;font-size:13px;color:#5f747e}.secret-flow{display:flex;align-items:center;justify-content:center;gap:12px;overflow:auto}.secret-flow i{white-space:nowrap;color:#7c3aed;font-style:normal;font-weight:900}.secret-card{width:170px;flex:0 0 170px;border:2px solid #cab7e9;border-radius:14px;background:#fff;overflow:hidden;text-align:center}.secret-card img{width:100%;height:100px;object-fit:cover}.secret-card b,.secret-card span,.secret-card strong{display:block;padding:4px}.secret-card.ready{background:#f3eaff;border-color:#7c3aed}.secret-card.ready strong{font-size:22px;color:#7c3aed}.turn-example{display:grid;gap:7px}.example-step{display:grid;grid-template-columns:80px 130px 1fr;align-items:center;gap:15px;background:#f8fbfc;border:1px solid #dce8ed;border-radius:14px;padding:12px}.example-step>span{font-weight:1000;color:#0e7490}.example-step p{margin:0;line-height:1.7}.example-step.finish{background:#fff7dd}.down{text-align:center;font-size:23px;color:#0e7490}.result-stars{font-size:26px;color:#c18400}.cards-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}.rule-card{display:grid;grid-template-columns:100px 1fr;border:1px solid #d9e6eb;border-radius:12px;overflow:hidden;background:#fbfdfe}.rule-card img{width:100%;height:100%;min-height:130px;object-fit:cover;background:#dfeff3}.rule-card>div{padding:10px}.rule-card small,.rule-card b,.rule-card em,.rule-card span{display:block}.rule-card b{font-size:15px;margin:3px 0}.rule-card em{font-style:normal;color:#8a6200;font-size:12px}.rule-card p{margin:7px 0;font-size:12px;line-height:1.5;color:#405965}.rule-card span{font-size:11px;color:#687d87}.faq{display:grid;grid-template-columns:1fr 1fr;gap:8px}.faq>div{display:flex;flex-direction:column;background:#f5fafb;border-radius:12px;padding:13px}.faq span{margin-top:4px;color:#536b76}.end{text-align:center}.back.bottom{margin-top:0}.end .faq{text-align:left}
@media(max-width:800px){.hero-inner{flex-direction:column;align-items:flex-start}.three,.callouts,.mission-cards,.moods{grid-template-columns:repeat(2,1fr)}.cards-grid{grid-template-columns:1fr}.flow{flex-direction:column}.flow>span{transform:rotate(90deg)}.chain-row,.link-stage,.mood-scene{justify-content:flex-start}.scorebar{grid-template-columns:1fr}.mission{align-items:flex-start;flex-direction:column}.mission em{margin-left:0}.example-step{grid-template-columns:70px 120px 1fr}}
@media(max-width:520px){main{padding:0 8px}.panel{padding:18px 12px}.three,.callouts,.mission-cards,.moods,.explain-grid,.bonus,.faq{grid-template-columns:1fr}.example-step{grid-template-columns:1fr}.mission-demo{grid-template-columns:1fr}.rule-card{grid-template-columns:82px 1fr}.visual-card.large{width:150px;flex-basis:150px}}

/* 2026-10-07: 読みやすさ改善。説明文字を大きくし、横幅を詰める */
body{font-size:17px;line-height:1.65}
.hero-inner,main{max-width:1040px}
.hero p{font-size:17px}.panel{padding:24px}.panel h2{font-size:28px;line-height:1.35}
.big-rule p{font-size:16px}.callouts span{font-size:15px;line-height:1.5}.flow small{font-size:14px}.lead{font-size:17px}
.visual-card b{font-size:14px}.visual-card small{font-size:12px}.visual-card em{font-size:13px}
.mission-cards p{font-size:14px}.rule-card small{font-size:13px}.rule-card b{font-size:17px}.rule-card em{font-size:14px}.rule-card p{font-size:14px}.rule-card span{font-size:13px}
.faq span{font-size:15px}.warn,.reward-strip{font-size:15px}
@media(max-width:520px){body{font-size:16px}.panel h2{font-size:23px}}

@media(max-width:900px){
  .hero-inner{grid-template-columns:1fr}
  .rule-nav{justify-content:flex-start;flex-wrap:wrap}
}


/* ===== ルールページ ボタン位置ずれ修正 ===== */
.rule-nav,
.rule-nav.bottom-nav{
  display:flex;
  align-items:center;
  justify-content:center;
  gap:14px;
  flex-wrap:wrap;
}

.rule-nav .back,
.rule-nav.bottom-nav .back{
  display:flex;
  align-items:center;
  justify-content:center;
  box-sizing:border-box;
  min-height:52px;
  padding:12px 18px;
  line-height:1.2;
  text-align:center;
}

.rule-nav .second-rule,
.rule-nav .bottom{
  min-width:150px;
}

@media(max-width:800px){
  .hero-inner{
    grid-template-columns:1fr;
  }
  .hero-inner .rule-nav{
    width:100%;
    justify-content:center;
  }
}

@media(max-width:520px){
  .hero-inner .rule-nav,
  .bottom-nav{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:12px;
    width:100%;
  }

  .hero-inner .rule-nav .back,
  .bottom-nav .back{
    width:100%;
    min-width:0;
    min-height:52px;
  }
}

/* サーバー表示時の下部ボタン縦ずれ防止 */
.bottom-nav .back.bottom{margin-top:0!important}