:root{--ink:#173236;--muted:#536a6a;--teal:#087e81;--aqua:#d6f2ee;--coral:#ee6246;--paper:#f8f7f1;--line:#d6dfd8;--radius:20px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans JP","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;font-size:17px;line-height:1.9;-webkit-font-smoothing:antialiased}a{color:var(--teal);text-decoration-thickness:1px;text-underline-offset:5px}a:hover{color:#bb3e29}button,input{font:inherit}button,a,input{touch-action:manipulation}button:focus-visible,a:focus-visible,input:focus-visible{outline:3px solid #e56930;outline-offset:5px}img{max-width:100%;height:auto;display:block}figure{margin:0}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.45;letter-spacing:.01em}h1{font-size:clamp(32px,3.9vw,58px);font-weight:850}h2{font-size:clamp(25px,2.6vw,35px)}h3{font-size:21px}p{margin-bottom:1.1em}.wrap{width:min(1240px,calc(100% - 80px));margin-inline:auto}.site-header{background:rgba(248,247,241,.97);position:sticky;top:0;z-index:30;border-bottom:1px solid var(--line)}.header-inner{width:min(1320px,calc(100% - 64px));min-height:92px;margin:auto;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:flex;gap:12px;align-items:center;color:var(--ink);text-decoration:none;white-space:nowrap}.brand b{font-size:21px;display:block;line-height:1.4}.brand small{font-size:13px;display:block;font-weight:700;letter-spacing:.06em}.brand i{font-size:10px;font-style:normal;letter-spacing:.14em;margin-left:10px;color:var(--teal)}#site-nav{display:flex;gap:25px;align-items:center}#site-nav a{font-size:14px;font-weight:750;text-decoration:none;color:var(--ink);padding:14px 0}#site-nav a:hover{color:var(--teal)}.menu-toggle{display:none}.hero{display:grid;grid-template-columns:.9fr 1.1fr;align-items:center;gap:45px;padding-top:70px;padding-bottom:70px}.eyebrow{display:block;font-size:12px;letter-spacing:.16em;color:var(--teal);font-weight:800;margin-bottom:18px}.hero h1{font-size:clamp(38px,4.25vw,65px);line-height:1.45;letter-spacing:.025em;margin-bottom:22px}.hero h1 em{font-style:normal;color:var(--teal)}.hero-copy>p{color:var(--muted);font-size:18px}.actions{display:flex;align-items:center;gap:24px;margin:30px 0}.button{display:inline-flex;align-items:center;justify-content:space-between;gap:24px;background:var(--teal);color:white;text-decoration:none;border-radius:9px;padding:15px 23px;font-weight:750;font-size:15px;box-shadow:0 5px 0 #055b5d;transition:transform .2s,background .2s}.button:hover{color:white;background:#096c6d;transform:translateY(-2px)}.text-link{font-size:14px;font-weight:750;white-space:nowrap}.hero-stats{display:flex;gap:24px;padding-top:27px;border-top:1px solid var(--line);font-size:12px;color:var(--muted)}.hero-stats b{font-size:25px;font-weight:850;margin-right:4px;color:var(--ink)}.hero-visual{position:relative}.hero-visual img{width:100%;aspect-ratio:1.14;object-fit:cover;object-position:57% center;border-radius:140px 24px 24px 24px;box-shadow:14px 15px 0 var(--aqua)}figcaption{font-size:10px;color:#536a6a;text-align:right;margin:7px 0}.visual-badge{position:absolute;bottom:40px;left:-25px;background:var(--coral);color:white;line-height:1.4;padding:16px 24px;font-size:12px;letter-spacing:.13em;transform:rotate(-5deg);border:3px solid var(--paper);border-radius:8px}.visual-badge b{font-size:19px}.racing-strip{background:var(--teal);color:#e0f5ee;white-space:nowrap;overflow:hidden;letter-spacing:.19em;font-size:15px;font-weight:800;padding:18px 0;text-align:center}.racing-strip span{margin:0 40px;color:#f5cf66}.section{padding:55px 0}.section-title{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:28px}.section-title .eyebrow{margin-bottom:8px}.section-title h2{margin-bottom:0}.card-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}.course-card{display:block;background:white;text-decoration:none;color:var(--ink);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .25s,box-shadow .25s}.course-card:hover{transform:translateY(-5px);box-shadow:0 15px 35px #153c3112;color:var(--ink)}.course-card>img{aspect-ratio:16/10;object-fit:cover;width:100%}.course-card>div{padding:22px;position:relative}.kicker{font-size:11px;letter-spacing:.035em;font-weight:750;color:var(--teal)}.course-card h3{font-size:18px;margin:10px 0}.course-card p{font-size:13px;color:var(--muted);margin:0 15px 0 0;line-height:1.7}.card-arrow{position:absolute;right:15px;bottom:18px;font-size:22px;color:var(--teal)}.feature-band{display:grid;grid-template-columns:1fr 1fr;background:var(--ink);color:white;border-radius:25px;overflow:hidden;margin:35px 0}.feature-band>div{padding:45px}.feature-band .eyebrow{color:#91dcd6}.feature-band p{font-size:15px;color:#d1e3dd}.feature-band>img{height:100%;object-fit:cover}.light{background:var(--aqua);color:var(--ink);box-shadow:none}.light:hover{background:white;color:var(--teal)}.reading-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:25px}.reading-card{display:block;overflow:hidden;text-decoration:none;border-radius:20px;background:white;border:1px solid var(--line);color:var(--ink)}.reading-card img{width:100%;aspect-ratio:16/9;object-fit:cover}.reading-card div{padding:24px}.reading-card h3{font-size:20px;margin:10px 0 15px}.reading-card span:last-child{font-size:13px;color:var(--teal)}.notice{padding:30px 36px;border-left:5px solid var(--teal);background:#e6eee6;border-radius:0 16px 16px 0;margin:35px 0 70px}.notice h2{font-size:21px}.notice p{font-size:15px}.notice a{font-size:14px}.ad-slot{margin:35px auto;text-align:center;min-height:150px;border-top:1px solid #d6dfd880;border-bottom:1px solid #d6dfd880;padding:10px 0;clear:both}.ad-slot>span{display:block;font-size:10px;color:var(--muted);margin-bottom:6px}.adsbygoogle{min-height:100px;overflow:hidden}footer{background:#173236;color:#d6e6df;padding:55px 0;font-size:14px}.footer-inner{display:grid;grid-template-columns:1fr 1fr;gap:24px}.footer-inner b{font-size:21px;color:white}.footer-inner p{margin-top:10px;color:#a9cac2}.footer-inner nav{display:flex;flex-wrap:wrap;gap:18px;align-content:start}.footer-inner a{color:#d6e6df}.footer-inner>small{grid-column:1/-1;color:#b2c8c2;font-size:11px}.breadcrumb{font-size:12px;padding-top:20px;color:var(--muted)}.page-heading{padding-top:35px;padding-bottom:25px;display:grid;grid-template-columns:1.15fr .85fr;gap:45px;align-items:center}.page-heading h1{font-size:clamp(30px,3.2vw,44px);margin-bottom:20px}.lead{font-size:17px;color:var(--muted)}.article-hero img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:25px}.article-layout{display:grid;grid-template-columns:minmax(0,840px) minmax(220px,1fr);gap:60px;align-items:start;padding-bottom:65px}.article-body{min-width:0}.prose{margin:40px 0}.prose p{font-size:18px;line-height:2}.prose h2{font-size:27px;border-bottom:2px solid var(--aqua);padding-bottom:14px;margin-top:35px}.prose ol,.prose ul{padding-left:1.5em}.prose li{padding-left:.2em;margin:12px 0}.quick-note{background:var(--aqua);padding:28px;border-radius:16px}.quick-note b{font-size:14px}.quick-note p{font-size:24px;font-weight:750;margin:8px 0}.quick-note a{font-size:14px}.video-section{background:white;padding:24px;border:1px solid var(--line);border-radius:20px;margin:35px 0}.video-section h2{font-size:24px}.video-section video{display:block;width:100%;max-height:620px;background:#112a2e;aspect-ratio:4/3;border-radius:10px}.caption{font-size:12px;color:var(--muted);margin:12px 0 0}.article-aside{position:sticky;top:130px;background:white;padding:26px;border-radius:18px;border:1px solid var(--line);margin-top:10px}.article-aside h2{font-size:23px}.article-aside p{font-size:15px}.article-aside a{display:block;border-top:1px solid var(--line);padding:15px 0;font-size:14px}.related-links{display:grid;gap:12px}.related-links a{background:white;border:1px solid var(--line);padding:15px 20px;border-radius:10px}.course-search{padding:30px;background:var(--aqua);border-radius:18px}.course-search label{display:block;font-size:15px;font-weight:750;margin-bottom:12px}.course-search input{width:100%;background:white;border:1px solid #8cbbb5;border-radius:8px;padding:14px 18px;font-size:17px;color:var(--ink)}.course-search p{font-size:12px;margin:10px 0 0}.cup-nav{display:flex;flex-wrap:wrap;gap:12px;margin:25px 0}.cup-nav a{background:white;border:1px solid var(--line);padding:9px 16px;border-radius:30px;text-decoration:none;font-size:13px;font-weight:700}.table-scroll{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:15px;background:white}caption{text-align:left;font-size:13px;color:var(--muted);padding:12px 0}th,td{padding:16px;border:1px solid var(--line);text-align:left}thead th{background:var(--aqua)}tbody th{width:37%;font-weight:700}.skip-link{position:fixed;left:16px;top:-80px;background:white;padding:10px;z-index:100}.skip-link:focus{top:12px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}[hidden]{display:none!important}@media(prefers-reduced-motion:no-preference){.js-motion .reveal{opacity:0;transform:translateY(22px);transition:opacity .65s ease,transform .65s ease}.js-motion .reveal.visible{opacity:1;transform:none}}@media(min-width:1600px){.hero{padding-top:85px;padding-bottom:85px}}@media(max-width:1100px){#site-nav{gap:15px}#site-nav a{font-size:12px}.brand b{font-size:18px}.brand i{display:none}.hero{gap:28px}.actions{gap:15px;flex-wrap:wrap}.hero h1{font-size:46px}.card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.article-layout{gap:30px;grid-template-columns:minmax(0,1fr) 230px}.feature-band>div{padding:32px}}@media(max-width:760px){body{font-size:17px}.wrap{width:calc(100% - 36px)}.header-inner{width:calc(100% - 32px);min-height:76px}.brand img{width:35px;height:35px}.brand b{font-size:18px}.brand small{font-size:11px}.menu-toggle{display:flex;align-items:center;justify-content:center;width:48px;height:48px;border:1px solid var(--line);background:white;border-radius:10px;font-size:25px;color:var(--teal);cursor:pointer}#site-nav{position:absolute;display:flex;flex-direction:column;align-items:stretch;gap:0;top:76px;right:0;left:0;background:var(--paper);padding:10px 24px 20px;border-bottom:1px solid var(--line);box-shadow:0 15px 25px #17323612}#site-nav a{font-size:16px;border-bottom:1px solid var(--line);padding:14px 8px}.js-ready #site-nav:not(.open){display:none}.hero{grid-template-columns:1fr;padding-top:34px;padding-bottom:42px;gap:36px}.hero .eyebrow{font-size:10px}.hero h1{font-size:41px;line-height:1.4;margin-bottom:18px}.hero-copy>p{font-size:16px}.actions{margin:24px 0;gap:18px}.hero-stats{gap:26px;padding-top:20px}.hero-stats b{font-size:22px}.hero-visual{margin-left:10px;margin-right:10px}.hero-visual img{aspect-ratio:1.45;border-radius:65px 18px 18px 18px;box-shadow:9px 10px 0 var(--aqua)}.visual-badge{left:-8px;bottom:30px;font-size:10px;padding:10px 16px}.visual-badge b{font-size:15px}.racing-strip{font-size:11px;padding:14px 0}.section{padding:34px 0}.section-title{display:block;margin-bottom:22px}.section-title h2{font-size:26px;margin-bottom:10px}.section-title .text-link{display:inline-block;margin-top:7px}.card-grid{gap:13px}.course-card{border-radius:14px}.course-card>div{padding:14px 12px 18px}.course-card h3{font-size:16px;line-height:1.55;margin:7px 0}.course-card p{font-size:12px;margin-right:0}.course-card .kicker{font-size:10px}.card-arrow{display:none}.feature-band{grid-template-columns:1fr;margin:20px 0;border-radius:18px}.feature-band>div{padding:28px}.feature-band>img{max-height:240px;width:100%}.feature-band h2{font-size:27px}.reading-grid{grid-template-columns:1fr;gap:18px}.reading-card{display:grid;grid-template-columns:38% 1fr;align-items:center}.reading-card img{height:100%;aspect-ratio:auto;min-height:170px}.reading-card div{padding:17px}.reading-card h3{font-size:17px}.notice{padding:24px;margin:25px 0 40px}.ad-slot{margin:26px auto;min-height:130px}.footer-inner{grid-template-columns:1fr;gap:18px}.footer-inner b{font-size:19px}.footer-inner nav{gap:15px}.page-heading{display:block;padding-top:26px;padding-bottom:15px}.page-heading h1{font-size:31px;line-height:1.5}.lead{font-size:16px}.article-hero{margin-top:25px}.article-hero img{aspect-ratio:16/9;border-radius:16px}.article-layout{display:block;padding-bottom:35px}.article-aside{position:static;margin-top:35px}.prose{margin:30px 0}.prose h2{font-size:25px}.prose p{font-size:17px;line-height:1.95}.quick-note{padding:22px}.quick-note p{font-size:21px}.video-section{padding:15px}.video-section h2{font-size:21px}.caption{font-size:11px}.course-search{padding:22px}.cup-nav{gap:8px}.cup-nav a{padding:8px 11px;font-size:12px}th,td{padding:12px;font-size:14px}.article-body>.reading-card{display:block}.article-body>.reading-card h2{padding:20px;font-size:22px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}

/* Preserve the complete Japanese copy embedded in the illustrations. */
.hero-visual img,
.article-hero img,
.course-card > img {
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: var(--aqua);
}


/* Excerpt lists use six cards, with two columns on narrow screens. */
.hero + .racing-strip + .wrap .card-grid,
.recommendation-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}
.related-articles { margin-top: 40px; }
.recommendation-grid .reading-card h3 { font-size: 17px; }
.recommendation-grid .reading-card div { padding: 16px; }
@media (max-width: 760px) {
  .hero + .racing-strip + .wrap .card-grid,
  .reading-grid,
  .recommendation-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .reading-grid .reading-card { display: block; }
  .reading-grid .reading-card img { height: auto; min-height: 0; aspect-ratio: 16 / 9; }
  .reading-grid .reading-card h3 { font-size: 16px; }
  .reading-grid .reading-card div { padding: 12px; }
}