:root{--navy:#122034;--navy-2:#1d3352;--ink:#1a2736;--muted:#657184;--paper:#fffdf7;--bg:#eef2f7;--line:#d6dfeb;--gold:#c79637;--gold-soft:#fff4d6;--blue:#0d619d;--teal:#1d7569;--red:#b8453e;--shadow:0 14px 40px rgba(18,32,52,.08);--radius:18px}
*{box-sizing:border-box}html{scroll-behavior:smooth}:target{scroll-margin-top:88px}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;font-size:16px;line-height:1.75;overflow-wrap:anywhere}a{color:var(--blue);text-underline-offset:3px}a:hover{color:#094a77}img{max-width:100%;height:auto}.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.skip-link{position:fixed;left:10px;top:-100px;z-index:9999;background:#fff;padding:10px 14px;border-radius:8px}.skip-link:focus{top:10px}
.site-header{position:sticky;top:0;z-index:100;background:linear-gradient(115deg,#0f1b2d,#172945);border-bottom:3px solid var(--gold);box-shadow:0 4px 18px rgba(0,0,0,.13)}.site-header__inner{max-width:1220px;margin:auto;min-height:70px;padding:0 22px;display:flex;align-items:center;justify-content:space-between;gap:20px}.site-brand{display:flex;align-items:baseline;gap:10px;color:white;text-decoration:none;white-space:nowrap}.site-brand__main{font-size:1.14rem;font-weight:800;letter-spacing:.02em}.site-brand__sub{font-size:.78rem;color:#f0c96a;font-weight:800}.global-nav{display:flex;align-items:center;gap:2px}.global-nav a{color:#fff;text-decoration:none;font-weight:700;font-size:.9rem;padding:22px 11px;border-radius:8px}.global-nav a:hover,.global-nav a[aria-current=page]{background:rgba(255,255,255,.12);color:#ffe59a}.nav-toggle{display:none;background:transparent;border:1px solid rgba(255,255,255,.45);border-radius:10px;width:48px;height:44px;padding:9px}.nav-toggle span:not(.sr-only){display:block;height:2px;background:#fff;margin:5px 0}
.breadcrumbs{background:#fff;border-bottom:1px solid var(--line)}.breadcrumbs ol{max-width:1180px;margin:0 auto;padding:10px 18px;display:flex;flex-wrap:wrap;gap:7px;list-style:none;font-size:.86rem}.breadcrumbs li+li:before{content:"›";margin-right:7px;color:#8b96a5}.breadcrumbs span{color:var(--muted)}
.site-main{max-width:1180px;margin:0 auto;padding:24px 18px 70px}.page-hero{background:linear-gradient(125deg,var(--navy),var(--navy-2));color:#fff;border-radius:var(--radius);padding:38px 42px;margin-bottom:18px;box-shadow:var(--shadow)}.page-hero__eyebrow{margin:0 0 4px;color:#f2ca67;font-weight:800}.page-hero h1{margin:0;font-size:clamp(1.8rem,4vw,3.1rem);line-height:1.25;letter-spacing:.01em}.page-hero>p:last-child{margin:14px 0 0;max-width:900px;color:#e4eaf2}.topic-nav{display:flex;flex-wrap:wrap;gap:9px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px;margin-bottom:22px}.topic-nav a{display:inline-flex;text-decoration:none;font-weight:700;background:#edf3f8;padding:8px 14px;border-radius:999px}.topic-nav a:hover{background:#dce9f4}
.home-hero{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(230px,.5fr);gap:28px;align-items:center;background:linear-gradient(125deg,var(--navy),#233b5d);color:#fff;border-radius:24px;padding:44px;margin-bottom:24px;box-shadow:var(--shadow)}.home-hero__kicker{color:#f1c95f;font-weight:800;margin:0}.home-hero h1{font-size:clamp(2rem,4.5vw,3.7rem);line-height:1.2;margin:7px 0 16px}.home-hero p{color:#e7edf5}.home-hero__mark{background:linear-gradient(145deg,#fffdf7,#f5ead0);border:1px solid rgba(255,255,255,.72);border-radius:18px;padding:28px;display:flex;justify-content:center;align-items:center;min-height:170px;box-shadow:inset 0 0 0 7px rgba(255,255,255,.44)}.hero-badge{text-align:center;color:var(--navy);line-height:1}.hero-badge__number{display:block;font-family:Georgia,serif;font-size:5rem;font-weight:900;letter-spacing:-.06em;color:var(--gold);text-shadow:0 2px 0 #fff}.hero-badge__label{display:block;margin-top:2px;font-weight:900;letter-spacing:.18em}.hero-badge__line{display:block;margin-top:14px;padding-top:12px;border-top:1px solid #d8c28b;font-size:.72rem;font-weight:800;letter-spacing:.12em;color:#5c4b2c}.hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}.button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 18px;border-radius:10px;background:var(--gold);color:#152238;text-decoration:none;font-weight:800;border:1px solid transparent}.button:hover{background:#e0b253;color:#152238}.button--ghost{background:transparent;color:white;border-color:rgba(255,255,255,.5)}.button--ghost:hover{background:rgba(255,255,255,.12);color:white}
.section-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;margin:22px 0;box-shadow:var(--shadow)}.section-card>h2:first-child,.section-card__title{margin-top:0}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:15px;margin-bottom:15px}.section-heading h2{margin:0;font-size:1.45rem}.section-heading p{margin:0;color:var(--muted)}.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.card-grid--4{grid-template-columns:repeat(4,minmax(0,1fr))}.nav-card{display:block;background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;text-decoration:none;color:var(--ink);box-shadow:0 6px 20px rgba(18,32,52,.05);transition:transform .15s,box-shadow .15s}.nav-card:hover{color:var(--ink);transform:translateY(-2px);box-shadow:0 10px 26px rgba(18,32,52,.12)}.nav-card__label{display:block;color:var(--gold);font-weight:800;font-size:.8rem}.nav-card strong{display:block;font-size:1.06rem;margin:4px 0}.nav-card p{margin:0;color:var(--muted);font-size:.9rem}.series-update{display:flex;align-items:flex-start;gap:12px;background:#fffaf0;border:1px solid #e6c777;border-left:5px solid var(--gold);border-radius:14px;padding:14px 17px;margin:-7px 0 24px;box-shadow:0 8px 24px rgba(18,32,52,.05)}.series-update strong{white-space:nowrap;color:#6d4c0f}.series-update p{margin:0}.range-details{border:1px solid var(--line);border-radius:14px;background:#f7f9fc}.range-details summary{cursor:pointer;padding:14px 17px;font-weight:800;color:var(--blue);list-style:none}.range-details summary::-webkit-details-marker{display:none}.range-details summary:after{content:"＋";float:right}.range-details[open] summary:after{content:"−"}.range-details__body{padding:0 14px 14px}.range-details .nav-card{padding:13px}.range-details .nav-card p{font-size:.82rem}.stat-row{display:flex;flex-wrap:wrap;gap:10px;margin:15px 0}.stat-chip{background:#edf3f8;border:1px solid #d7e3ed;border-radius:999px;padding:7px 13px;font-weight:700}.notice{background:var(--gold-soft);border:1px solid #e5c777;border-left:5px solid var(--gold);border-radius:12px;padding:14px 16px;margin:16px 0}.notice--spoiler{background:#fff1ee;border-color:#e9aaa4;border-left-color:var(--red)}
.search-box{display:flex;gap:8px}.search-box input,.filter-bar input,.filter-bar select{width:100%;min-height:46px;border:1px solid #bac7d5;border-radius:10px;padding:10px 12px;background:#fff;font:inherit}.search-box button,.filter-bar button{min-height:46px;border:0;border-radius:10px;background:var(--blue);color:#fff;padding:0 18px;font-weight:800;cursor:pointer}.filter-bar{display:grid;grid-template-columns:2fr 1fr 1fr;gap:10px;margin:15px 0}.progress-panel{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;background:#eef6f4;border:1px solid #c7dfda;border-radius:12px}.progress-panel strong{color:var(--teal)}
.puzzle-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.puzzle-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;display:grid;grid-template-columns:auto 1fr;gap:12px}.puzzle-card__check{padding-top:2px}.puzzle-card__check input{width:22px;height:22px;accent-color:var(--teal)}.puzzle-card h2,.puzzle-card h3{font-size:1.05rem;margin:0 0 5px;line-height:1.45}.puzzle-card__meta{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:8px}.meta-badge{font-size:.78rem;background:#edf3f8;border-radius:999px;padding:3px 8px;color:#42536a}.puzzle-card p{font-size:.9rem;margin:5px 0;color:var(--muted)}.puzzle-card[hidden]{display:none}.puzzle-number{color:var(--gold);font-weight:900}.puzzle-detail-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(280px,.65fr);gap:18px}.definition-card{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}.definition-card dl{display:grid;grid-template-columns:130px 1fr;margin:0}.definition-card dt,.definition-card dd{padding:13px 15px;border-bottom:1px solid var(--line);margin:0}.definition-card dt{background:#f1f4f8;font-weight:800}.definition-card dd:last-child,.definition-card dt:last-of-type{border-bottom:0}.hint-box{background:#fff;border:1px solid var(--line);border-radius:16px;padding:22px}.hint-box h2{margin-top:0}.answer-details{background:#fff;border:1px solid #e0b2ad;border-radius:16px;overflow:hidden;margin-top:18px}.answer-details summary{cursor:pointer;background:#fff1ee;color:#8c2e28;font-weight:800;padding:16px 20px;list-style:none}.answer-details summary::-webkit-details-marker{display:none}.answer-details summary:after{content:"＋";float:right}.answer-details[open] summary:after{content:"−"}.answer-content{padding:22px}.answer-content img{display:block;margin:14px auto;border:1px solid var(--line);border-radius:8px;image-rendering:auto}.answer-content .data-table{min-width:0}.answer-content strong{color:#943b35}.pager{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:22px 0}.pager a{background:#fff;border:1px solid var(--line);border-radius:12px;padding:13px;text-decoration:none;font-weight:700}.pager a:last-child{text-align:right}
.chapter-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.chapter-card{display:flex;gap:12px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px;text-decoration:none;color:var(--ink)}.chapter-card:hover{color:var(--ink);border-color:#9bb4cc}.chapter-card__num{width:38px;height:38px;border-radius:50%;display:grid;place-items:center;background:var(--navy);color:#fff;font-weight:900;flex:0 0 auto}.chapter-card strong{display:block}.chapter-card small{color:var(--muted)}.walkthrough-section{background:#fff;border:1px solid var(--line);border-radius:16px;margin:15px 0;overflow:hidden}.walkthrough-section h2{margin:0;background:#273b58;color:#fff;padding:13px 17px;font-size:1.1rem}.walkthrough-steps{list-style:none;margin:0;padding:0}.walkthrough-steps li{display:grid;grid-template-columns:54px 1fr;gap:10px;padding:12px 16px;border-bottom:1px solid var(--line)}.walkthrough-steps li:last-child{border-bottom:0}.step-label{font-weight:800;color:var(--gold)}
.table-scroll{max-width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:14px}.data-table{width:100%;border-collapse:collapse;background:#fff;min-width:520px}.data-table th,.data-table td{border:1px solid var(--line);padding:11px 13px;text-align:left;vertical-align:top}.data-table tr:first-child td,.data-table tr:first-child th{background:#273b58;color:#fff;font-weight:800;text-align:center}.generic-content{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}.generic-content>.table-scroll{margin:14px 0}.generic-content .data-table{min-width:0}.generic-content p:first-child{margin-top:0}.generic-content br+br{line-height:2.2}.side-subnav{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 20px}.side-subnav a{background:#edf3f8;border-radius:999px;padding:7px 12px;text-decoration:none;font-weight:700}
.coin-group{background:#fff;border:1px solid var(--line);border-radius:16px;margin:15px 0;overflow:hidden}.coin-group h2{margin:0;padding:13px 17px;background:#273b58;color:#fff;font-size:1.05rem}.coin-list{list-style:none;margin:0;padding:0}.coin-list li{display:grid;grid-template-columns:auto 150px 1fr;gap:12px;align-items:start;padding:12px 15px;border-bottom:1px solid var(--line)}.coin-list li:last-child{border-bottom:0}.coin-list input{width:21px;height:21px;accent-color:var(--teal);margin-top:3px}.coin-location{font-weight:800}
.site-footer{background:#101c2e;color:#d7deea}.site-footer__inner{max-width:1180px;margin:auto;padding:30px 18px}.site-footer nav{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:15px}.site-footer a{color:#fff}.site-footer p{font-size:.86rem;margin:7px 0}.back-to-top{position:fixed;right:18px;bottom:18px;width:48px;height:48px;border-radius:50%;border:1px solid #b5c0cd;background:#fff;color:var(--navy);font-size:1.25rem;box-shadow:var(--shadow);cursor:pointer;opacity:0;pointer-events:none;transition:.2s}.back-to-top.is-visible{opacity:1;pointer-events:auto}
.search-results{display:grid;gap:10px}.search-result{background:#fff;border:1px solid var(--line);border-radius:12px;padding:15px}.search-result h2{font-size:1.05rem;margin:0 0 5px}.search-result p{margin:0;color:var(--muted);font-size:.9rem}.empty-state{padding:25px;background:#fff;border:1px dashed #9faebe;border-radius:12px;text-align:center;color:var(--muted)}

@media(max-width:1020px){.nav-toggle{display:block}.global-nav{display:none;position:absolute;left:0;right:0;top:70px;background:#13233a;border-bottom:3px solid var(--gold);padding:8px 12px 14px;grid-template-columns:repeat(2,minmax(0,1fr))}.global-nav.is-open{display:grid}.global-nav a{padding:13px 12px;border-bottom:1px solid rgba(255,255,255,.12)}}
@media(max-width:900px){.global-nav a{padding:22px 7px;font-size:.82rem}.card-grid,.card-grid--4{grid-template-columns:repeat(2,minmax(0,1fr))}.home-hero{grid-template-columns:1fr}.home-hero__mark{min-height:105px}.puzzle-detail-grid{grid-template-columns:1fr}}
@media(max-width:760px){body{font-size:16px}.site-header__inner{padding:0 14px;min-height:64px}.site-brand{display:block;line-height:1.25}.site-brand__main{display:block;font-size:1.03rem}.site-brand__sub{font-size:.7rem}.nav-toggle{display:block}.global-nav{display:none;position:absolute;left:0;right:0;top:64px;background:#13233a;border-bottom:3px solid var(--gold);padding:8px 12px 14px;grid-template-columns:1fr 1fr}.global-nav.is-open{display:grid}.global-nav a{padding:13px 12px;border-bottom:1px solid rgba(255,255,255,.12)}.site-main{padding:16px 12px 55px}.breadcrumbs ol{padding:8px 12px;font-size:.78rem}.page-hero{padding:25px 20px;border-radius:15px}.page-hero h1{font-size:1.72rem}.home-hero{padding:27px 20px;border-radius:16px}.home-hero h1{font-size:2rem}.home-hero__mark{display:none}.series-update{display:block;margin-top:-4px}.series-update strong{display:block;margin-bottom:5px}.card-grid,.card-grid--4,.puzzle-list,.chapter-list{grid-template-columns:1fr}.section-card{padding:18px;border-radius:15px}.section-heading{display:block}.section-heading p{margin-top:5px}.filter-bar{grid-template-columns:1fr}.search-box{flex-direction:column}.search-box button{width:100%}.definition-card dl{grid-template-columns:105px 1fr}.definition-card dt,.definition-card dd{padding:11px}.pager{grid-template-columns:1fr}.pager a:last-child{text-align:left}.walkthrough-steps li{grid-template-columns:42px 1fr;padding:11px 12px}.coin-list li{grid-template-columns:auto 1fr}.coin-location{grid-column:2}.coin-list li>div:last-child{grid-column:2}.topic-nav{gap:6px;padding:9px}.topic-nav a{font-size:.84rem;padding:7px 10px}.generic-content{padding:16px}.data-table{min-width:580px}.site-footer__inner{padding-bottom:75px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}