:root{--ink:#11131b;--paper:#f7f5ef;--blue:#1237c9;--navy:#071a66;--orange:#ffb000;--cyan:#53d2dc;--line:#d9d7d0}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Arial,"Noto Sans JP",sans-serif}a{color:inherit;text-decoration:none}.topbar{height:76px;padding:0 5vw;display:flex;align-items:center;justify-content:space-between;background:#fff;border-top:5px solid var(--ink);border-bottom:1px solid var(--line)}.brand{display:flex;align-items:baseline;gap:16px}.brand strong{font-size:21px}.brand span,.eyebrow{font-size:10px;letter-spacing:.16em;font-weight:800}.back{font-size:12px;border-bottom:1px solid;padding:8px 0}
.hero{min-height:calc(100vh - 76px);display:grid;grid-template-columns:58% 42%;background:#fff;border-bottom:1px solid var(--line)}.hero-copy{padding:8vh 6vw 7vh;background:linear-gradient(145deg,#fff 0%,#eef2ff 100%);display:flex;flex-direction:column;justify-content:center}.eyebrow{margin:0;color:var(--blue)}.award{align-self:flex-start;margin:26px 0 0;padding:10px 14px;background:var(--ink);color:#fff;font-size:13px;font-weight:700;border-left:8px solid var(--orange)}.award small{font-size:9px;font-weight:400}.hero h1{font-size:clamp(38px,4.6vw,67px);line-height:1.12;letter-spacing:-.055em;margin:28px 0 0}.hero h1 em{font-style:normal;color:var(--blue)}.subtitle{margin:24px 0 0;font-size:clamp(19px,2vw,28px);line-height:1.55;font-weight:700}.lead{max-width:720px;margin:22px 0 0;font-size:15px;line-height:1.95;color:#3f4453}.cover-panel{position:relative;overflow:hidden;padding:6vh 5vw;display:flex;flex-direction:column;align-items:center;justify-content:center;background:linear-gradient(155deg,var(--navy),var(--blue) 55%,#30a9c7)}.cover-panel:before{content:"";position:absolute;inset:0;background:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);background-size:42px 42px}.cover-frame{position:relative;z-index:1;padding:15px;background:#fff;box-shadow:24px 28px 0 rgba(0,0,0,.23);transform:rotate(1.5deg)}.cover-frame img{display:block;width:min(26vw,360px);height:auto}.cover-panel>p{position:relative;z-index:1;color:#fff;font-size:12px;letter-spacing:.15em;margin:35px 0 0}
.amazon-button{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:15px;width:min(100%,570px);margin-top:30px;padding:18px 20px;background:var(--orange);color:#111;box-shadow:7px 7px 0 #111;transition:.2s}.amazon-button span{font-size:11px}.amazon-button strong{font-size:16px}.amazon-button b{font-size:20px}.amazon-button:hover{transform:translate(-3px,-3px);box-shadow:11px 11px 0 #111}
.beginner-note{display:grid;gap:5px;max-width:720px;margin:22px 0 0;padding:16px 18px;background:#fff;border-left:7px solid var(--orange);font-size:13px;line-height:1.65}.beginner-note strong{color:var(--blue);font-size:14px}.quick-facts{display:grid;grid-template-columns:repeat(3,1fr);background:var(--ink);color:#fff}.quick-facts article{padding:30px 5vw;border-right:1px solid #373945}.quick-facts article:last-child{border:0}.quick-facts small{display:block;margin-bottom:8px;color:var(--cyan);font-size:10px;letter-spacing:.12em}.quick-facts strong{font-size:15px;line-height:1.55}
.section-block{padding:11vh 7vw;border-bottom:1px solid var(--line)}.section-block h2,.final-cta h2{font-size:clamp(34px,4.2vw,60px);line-height:1.2;letter-spacing:-.05em;margin:18px 0 0}.audience{background:#fff}.audience-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;margin-top:52px;background:var(--line);border:1px solid var(--line)}.audience-grid article{min-height:150px;padding:28px;background:#fff;display:grid;grid-template-columns:46px 1fr;gap:18px;align-items:start}.audience-grid span{font-size:11px;color:var(--blue);font-weight:800;letter-spacing:.13em}.audience-grid strong{font-size:18px;line-height:1.65}
.contents{display:grid;grid-template-columns:41% 59%;padding:0}.section-heading{padding:11vh 7vw;background:var(--blue);color:#fff}.section-heading .eyebrow{color:#aeeff2}.topic-list{background:#fff}.topic-list article{display:grid;grid-template-columns:84px 1fr;gap:26px;padding:33px 5vw;border-bottom:1px solid var(--line)}.topic-list article:last-child{border-bottom:0}.topic-list>article>span{font-size:10px;letter-spacing:.15em;font-weight:800;color:var(--blue);padding-top:6px}.topic-list h3{margin:0;font-size:23px}.topic-list p{margin:10px 0 0;color:#555d6c;font-size:14px;line-height:1.8}
.message{padding:0;background:#fff}.quote{padding:11vh 7vw;background:#f2c94c}.quote p{margin:0;font-size:clamp(30px,4vw,58px);line-height:1.45;letter-spacing:-.045em}.quote strong{color:var(--blue)}.author{display:grid;grid-template-columns:240px 1fr;gap:50px;align-items:center;padding:8vh 7vw}.author img{display:block;width:100%;max-height:270px;object-fit:contain}.author h2{margin:10px 0 0}.author>div>p:last-child{font-size:15px;line-height:2;color:#424957;max-width:720px}
.chapters{display:grid;grid-template-columns:minmax(260px,.8fr) 1.2fr;gap:6vw;background:#fff}.chapters-lead{font-size:15px;line-height:1.95;color:#505766}.chapters ol{list-style:none;margin:0;padding:0;border-top:1px solid var(--line)}.chapters li{display:grid;grid-template-columns:50px 1fr;gap:15px;padding:19px 8px;border-bottom:1px solid var(--line)}.chapters li span{color:var(--blue);font-size:11px;font-weight:800}.chapters li strong{font-size:16px;line-height:1.5}.sample-note{grid-column:2;margin:0;color:#5d6471;font-size:12px;line-height:1.7}.text-link{grid-column:2;justify-self:start;color:var(--blue);font-size:14px;font-weight:800;border-bottom:2px solid var(--blue);padding-bottom:5px}.faq{background:#eef2ff}.faq details{max-width:900px;background:#fff;border-bottom:1px solid var(--line);padding:0 22px}.faq details:first-of-type{margin-top:42px}.faq summary{cursor:pointer;padding:22px 0;font-size:17px;font-weight:800}.faq details p{margin:0;padding:0 0 22px;color:#505766;font-size:14px;line-height:1.9}
.related{background:#fff}.related-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:42px}.related-grid a{display:grid;gap:12px;padding:28px;border:1px solid var(--line);transition:.2s}.related-grid a:hover{transform:translateY(-3px);border-color:var(--blue)}.related-grid small{color:var(--blue);font-size:9px;letter-spacing:.14em;font-weight:800}.related-grid strong{font-size:19px;line-height:1.55}.related-grid span{font-size:12px;color:#596271}
.final-cta{padding:12vh 7vw;background:var(--ink);color:#fff;text-align:center;display:flex;flex-direction:column;align-items:center}.final-cta .eyebrow{color:var(--cyan)}.final-cta .amazon-button{text-align:left}.notice{max-width:700px;margin:36px 0 0;color:#aeb2bd;font-size:11px;line-height:1.8}footer{padding:31px 5vw;background:#05060a;color:#fff;display:flex;justify-content:space-between;font-size:12px}footer strong{font-size:18px;margin-right:10px}.mobile-cta{display:none}
@media(max-width:760px){.topbar{height:66px;padding:0 18px}.brand span{display:none}.back{font-size:11px}.hero{min-height:auto;grid-template-columns:1fr}.hero-copy{padding:52px 22px 48px}.award{margin-top:22px;font-size:11px}.hero h1{font-size:40px;line-height:1.17;margin-top:25px}.subtitle{font-size:19px}.lead{font-size:14px;line-height:1.85}.amazon-button{grid-template-columns:1fr auto;padding:16px 17px}.amazon-button span{grid-column:1/-1}.amazon-button strong{font-size:15px}.cover-panel{padding:52px 22px 64px}.cover-frame img{width:min(64vw,320px)}.quick-facts{grid-template-columns:1fr}.quick-facts article{border-right:0;border-bottom:1px solid #373945;padding:22px}.section-block{padding:72px 22px}.section-block h2,.final-cta h2{font-size:34px}.audience-grid{grid-template-columns:1fr;margin-top:36px}.audience-grid article{min-height:auto;padding:24px 20px}.audience-grid strong{font-size:16px}.contents{display:block;padding:0}.section-heading{padding:70px 22px}.topic-list article{grid-template-columns:62px 1fr;padding:28px 22px;gap:10px}.topic-list h3{font-size:20px}.chapters{grid-template-columns:1fr}.chapters ol{margin-top:20px}.sample-note,.text-link{grid-column:1}.related-grid{grid-template-columns:1fr}.quote{padding:72px 22px}.quote p{font-size:31px}.author{grid-template-columns:1fr;padding:58px 22px;gap:25px}.author img{width:180px;margin:auto}.final-cta{padding:78px 22px 118px}.final-cta .amazon-button{display:none}.mobile-cta{position:fixed;z-index:10;display:block;left:12px;right:12px;bottom:10px}.mobile-cta a{display:flex;align-items:baseline;justify-content:center;gap:8px;padding:16px;background:var(--orange);color:#111;box-shadow:0 8px 28px rgba(0,0,0,.3);border:2px solid #111}.mobile-cta span{font-size:11px}.mobile-cta strong{font-size:17px}footer{padding-bottom:90px;flex-direction:column;gap:18px}}