*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#f6f8fb;color:#192b3d;font-family:system-ui,-apple-system,"Noto Sans JP","Hiragino Kaku Gothic ProN",sans-serif;line-height:1.7}a{color:inherit}.wrap{max-width:1040px;margin:auto;padding:0 20px}.top{background:#fff;border-bottom:1px solid #e7ebf0;position:sticky;top:0;z-index:20}.top-inner{min-height:64px;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand{font-weight:900;letter-spacing:.03em;text-decoration:none;white-space:nowrap}.site-nav{display:flex;gap:6px;overflow:auto}.navlink{font-size:12px;white-space:nowrap;text-decoration:none;border-radius:12px;padding:8px 10px;color:#526278}.navlink.active{background:var(--soft);color:var(--accent);font-weight:800}.hero{padding:40px 0 30px}.eyebrow{font-size:12px;letter-spacing:.16em;color:var(--accent);font-weight:900}.hero h1{font-size:clamp(28px,4.5vw,47px);letter-spacing:-.04em;line-height:1.32;margin:10px 0}.hero p{color:#5b6a79;margin:0;max-width:650px}.feature{display:grid;grid-template-columns:1.35fr .65fr;gap:24px;align-items:center}.visual{min-height:160px;border-radius:24px;background:linear-gradient(140deg,var(--soft),#fff);display:grid;place-items:center;font-size:82px}.tiles{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:13px}.tile,.panel,.detail{background:#fff;border:1px solid #e4eaf0;border-radius:18px;padding:22px}.tile{text-decoration:none;display:block;transition:transform .2s}.tile:hover{transform:translateY(-2px)}.tile h2,.panel h2{font-size:19px;margin:6px 0}.tile p,.muted{font-size:14px;color:#5a6b7a}.num{font-size:12px;font-weight:900;color:var(--accent)}.panel{margin:15px 0}.panel h2{margin-top:0}.panel p{margin:6px 0}.panel ul{margin:8px 0;padding-left:22px}.pillbar{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}.pill,button,.linkbtn{border:1px solid #d9e2eb;background:#fff;border-radius:11px;padding:10px 15px;color:#284056;font:inherit;font-size:14px;cursor:pointer}.pill.active,.primary{background:var(--accent);border-color:var(--accent);color:#fff}.primary{display:inline-block;text-decoration:none;font-weight:800}.secondary{display:inline-block;border:1px solid #d9e2eb;border-radius:10px;padding:9px 14px;text-decoration:none;font-weight:700}.subnav{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 22px}.subnav a{background:var(--soft);border-radius:10px;padding:9px 12px;text-decoration:none;font-size:13px;font-weight:800;color:var(--accent)}.detail{margin:12px 0}.detail h3{margin:0 0 5px;font-size:18px}.detail p{color:#506172;margin:4px 0}.foot{margin-top:50px;border-top:1px solid #e2e8ee;padding:28px 0 40px;font-size:12px;color:#66798a}.foot a{margin-right:15px}.search{width:100%;font:inherit;border:1px solid #d8e2eb;border-radius:12px;padding:13px 15px;background:white}.idea-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.idea{background:#fff;border:1px solid #e2e8f0;border-radius:17px;padding:18px}.idea h3{font-size:17px;margin:8px 0}.idea p{font-size:13px;color:#536576;margin:4px 0 12px}.idea .tag{font-size:11px;font-weight:800;color:var(--accent)}.idea .copy{background:var(--soft);color:var(--accent);border:0;font-weight:800}.pages{display:flex;align-items:center;justify-content:space-between;gap:12px;margin:22px 0}.pages button:disabled{opacity:.3}.notice{background:#fff9e9;border:1px solid #f3e6c4;padding:13px 16px;border-radius:12px;font-size:13px;color:#695b40;margin:18px 0}.disclosure{font-size:12px;color:#647383;margin:20px 0}.sr{position:absolute;left:-10000px}@media(max-width:680px){.wrap{padding:0 14px}.top-inner{display:block;padding-top:10px;padding-bottom:8px}.brand{display:block;font-size:14px;margin-bottom:5px}.site-nav{gap:2px}.navlink{font-size:11px;padding:7px 8px}.hero{padding:25px 0 18px}.feature{grid-template-columns:1fr}.visual{min-height:105px;font-size:55px}.tiles,.idea-grid{grid-template-columns:1fr}.tile,.panel,.detail{padding:17px}.hero h1{font-size:29px}.pages{flex-wrap:wrap}}
/* v12 - Editorial visual system: responsive, lightweight and legible */
body{background:linear-gradient(180deg,#f7f6ff 0,#f7f9fc 560px,#f7f9fc 100%)}
.top{box-shadow:0 4px 22px rgba(37,35,83,.035)}
.brand{color:#28265a}
.hero.feature{position:relative;grid-template-columns:1fr 1fr;gap:24px;min-height:315px;margin:25px 0 10px;padding:30px;border-radius:28px;background:linear-gradient(120deg,#fff 0%,#fff 42%,var(--soft) 100%);border:1px solid #e8e5f5;overflow:hidden;box-shadow:0 18px 45px rgba(38,44,88,.07)}
.hero .eyebrow{letter-spacing:.1em}
.hero h1{font-size:clamp(28px,3.7vw,45px);max-width:540px;line-height:1.3}
.hero p{font-size:clamp(14px,1.6vw,17px);max-width:480px}
.art-visual{height:258px;min-height:0;position:relative;isolation:isolate;overflow:hidden;background:linear-gradient(145deg,#d7dcff,#fff0e8);border-radius:22px;box-shadow:0 12px 28px rgba(49,51,106,.13)}
.art-photo{position:absolute;inset:0;background:url('assets/scene.webp') center/cover no-repeat;filter:saturate(1.05)}
.art-visual:after{content:'';position:absolute;inset:0;background:linear-gradient(0deg,rgba(23,20,62,.55),transparent 53%)}
.art-sticker{position:absolute;right:14px;top:14px;z-index:2;width:52px;height:52px;border-radius:18px;display:grid;place-items:center;font-size:32px;color:#6d3cdd;background:rgba(255,255,255,.93);box-shadow:0 7px 20px #0002}
.art-label{position:absolute;bottom:15px;left:19px;z-index:2;color:white;font-size:16px;letter-spacing:.14em;font-weight:900}
.art-dot{position:absolute;z-index:2;border-radius:50%;background:#e8d8ff;border:4px solid white;width:17px;height:17px;box-shadow:0 2px 8px #0003}.art-dot-a{left:15px;top:20px}.art-dot-b{right:90px;bottom:30px;background:#aaf4df}
.legacy-visual[hidden]{display:none!important}
.quick-strip{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin:18px 0 23px}
.quick-strip>div{display:flex;align-items:center;gap:10px;padding:14px 17px;border:1px solid #e9e5f6;background:#fff;border-radius:15px;box-shadow:0 4px 12px #1a205308}
.quick-strip span{font-weight:900;font-size:14px;color:var(--accent);background:var(--soft);padding:7px;border-radius:10px}
.quick-strip strong{font-size:13px;white-space:nowrap}.quick-strip small{font-size:11px;color:#708091}
.subnav{padding:8px 0 4px;gap:9px}.subnav a{background:#fff;border:1px solid #e6e8f0;border-radius:100px;padding:9px 15px;box-shadow:0 4px 9px #1b1b4607}
.panel{border-radius:20px;box-shadow:0 7px 20px #1a205307;border-color:#e9e9f2}
.illustrated-panel{position:relative;padding-left:80px;min-height:112px}
.section-mark{position:absolute;left:21px;top:23px;width:42px;height:42px;border-radius:15px;display:grid;place-items:center;font-size:23px;font-weight:900;color:var(--accent);background:var(--soft)}
.detail{border-radius:15px;background:linear-gradient(155deg,#fff,#fcfcff);transition:transform .2s,box-shadow .2s}
.detail:hover,.idea:hover{transform:translateY(-2px);box-shadow:0 9px 22px #171e3b0f}
.editorial-banner{max-width:1000px;margin:24px auto 35px;position:relative;overflow:hidden;border-radius:24px;min-height:160px;background:#282052}
.editorial-banner img{width:100%;height:200px;object-fit:cover;display:block;filter:brightness(.65)}
.editorial-banner>div{position:absolute;left:24px;bottom:24px;color:#fff;display:grid;gap:7px}.editorial-banner span{font-size:11px;letter-spacing:.18em}.editorial-banner strong{font-size:clamp(17px,3vw,25px)}
.idea-grid{gap:13px}.idea{border-radius:18px;box-shadow:0 6px 15px #16264a09;transition:transform .2s,box-shadow .2s}
.idea .tag{display:inline-block;border-radius:20px;padding:5px 10px;background:var(--soft)}
.idea h3{line-height:1.45}.idea .copy{border-radius:11px;padding:11px 15px}
.search-panel{background:linear-gradient(135deg,#fff,#f4f4ff)}
.search-heading{display:flex;align-items:center;gap:15px}.search-heading p{font-size:13px;color:#607183}
.search-illustration{width:55px;height:55px;display:grid;place-items:center;background:#e9e6ff;color:#6752d5;border-radius:17px;font-size:40px;flex-shrink:0}
@media(max-width:720px){.hero.feature{grid-template-columns:1fr;padding:20px;min-height:0;gap:18px;margin:12px 0}.hero h1{font-size:clamp(27px,7vw,35px)}.art-visual{height:185px}.quick-strip{grid-template-columns:1fr;gap:7px;margin:12px 0}.quick-strip>div{padding:9px 12px}.quick-strip small{margin-left:auto}.illustrated-panel{padding:70px 16px 16px}.section-mark{left:16px;top:14px}.editorial-banner{margin:18px 14px}.editorial-banner img{height:155px}.top-inner{padding-top:8px}.site-nav{padding-bottom:4px}}
@media(prefers-reduced-motion:reduce){.detail,.idea{transition:none}}

/* v13 progressive beginner learning experience */
.beginner-main{max-width:1160px}
.beginner-hero{display:grid;grid-template-columns:1.15fr 1fr;gap:24px;align-items:center;margin:28px 0 18px;background:linear-gradient(125deg,#f3fffa,#f6f0ff 65%,#fff4e8);border:1px solid #e4e9e9;border-radius:26px;padding:30px;overflow:hidden}
.beginner-copy h1{font-size:clamp(2.1rem,4.3vw,3.7rem);line-height:1.25;letter-spacing:-.04em;margin:12px 0 15px;color:#182b3b}
.beginner-copy h1 em{font-style:normal;color:#6953d9}
.beginner-copy>p{font-size:1.02rem;line-height:1.85;color:#4a5d68}
.beginner-hero img{width:100%;height:340px;object-fit:cover;border-radius:22px;box-shadow:0 16px 36px #28384920}
.beginner-badges{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0}
.beginner-badges span{padding:7px 10px;border-radius:30px;background:#fff;color:#3d6470;font-size:.78rem;font-weight:700}
.beginner-cta{display:inline-block;background:linear-gradient(115deg,#8a46e7,#4768e6);border-radius:99px;padding:13px 23px;color:#fff!important;font-weight:800;text-decoration:none;margin:14px 0;box-shadow:0 8px 22px #715bd42c}
.beginner-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:16px 0 28px}
.beginner-summary>div{padding:15px 18px;background:#fff;border:1px solid #e5e9f0;border-radius:15px;display:grid;gap:3px}
.beginner-summary strong{font-size:.95rem}.beginner-summary small{color:#617582}
.beginner-section{margin:36px 0 46px}
.beginner-heading>span{font-size:.73rem;color:#7961d8;font-weight:900;letter-spacing:.13em}
.beginner-heading h2{font-size:clamp(1.4rem,2.8vw,2rem);margin:5px 0}
.beginner-heading p{color:#647481;line-height:1.7;margin:5px 0 19px}
.lesson-layout{display:grid;grid-template-columns:minmax(230px,.82fr) minmax(0,1.4fr);gap:15px;align-items:start}
.lesson-menu{display:grid;gap:7px}
.lesson-choice{width:100%;text-align:left;display:grid;grid-template-columns:36px 1fr 12px;gap:10px;align-items:center;border:1px solid #e4e9ef;background:white;border-radius:13px;padding:11px;cursor:pointer;color:#243846;font:inherit}
.lesson-choice[aria-pressed=true]{border-color:#a19af2;background:#f2efff;box-shadow:0 5px 15px #726bd013}
.lesson-choice .lesson-num{display:grid;place-items:center;background:#e9f4f0;color:#257c70;border-radius:10px;width:34px;height:34px;font-size:.8rem;font-weight:900}
.lesson-choice b{display:block;font-size:.91rem}.lesson-choice small{display:block;color:#667c86;font-size:.72rem;line-height:1.45}
.lesson-view{background:#fff;border:1px solid #e3e9ed;border-radius:20px;padding:24px;min-height:360px;box-shadow:0 12px 32px #1b3b4d0b}
.lesson-detail[hidden]{display:none}
.lesson-tag{font-size:.73rem;color:#7d63dd;font-weight:900;letter-spacing:.12em}
.lesson-detail h2{font-size:clamp(1.4rem,2.8vw,1.9rem);margin:12px 0}
.lesson-big{font-size:1.04rem;line-height:1.9;color:#324c59}
.lesson-example,.lesson-care{padding:14px 17px;border-radius:13px;margin:15px 0}
.lesson-example{background:#eefaf6}.lesson-care{background:#fff8ec}
.lesson-example b{color:#217e6a}.lesson-care b{color:#a46c20}
.lesson-example p,.lesson-care p{margin:5px 0 0;line-height:1.75;font-size:.91rem}
.lesson-actions{display:flex;justify-content:flex-end}
.lesson-actions button,.practice-card button{background:#2e6b70;color:white;border:0;border-radius:10px;padding:11px 17px;font-weight:800;cursor:pointer;font:inherit}
.lesson-actions button:disabled{background:#e7f4ef;color:#24745b;cursor:default}
.lesson-progress{margin-top:17px;color:#60747e;font-size:.8rem}
.lesson-progress>div{height:5px;background:#e8edf1;border-radius:10px;overflow:hidden;margin-top:7px}
.lesson-progress i{display:block;height:100%;background:linear-gradient(90deg,#37b5a4,#8462d8);transition:width .2s}
.practice-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.practice-card{background:#fff;border:1px solid #e3e8ef;border-radius:17px;padding:19px;display:flex;flex-direction:column;align-items:flex-start;gap:8px}
.practice-card>span{font-size:1.9rem}.practice-card h3{margin:0;font-size:1.04rem}.practice-card p{color:#60747e;font-size:.88rem;line-height:1.65;flex:1}
.practice-card button{font-size:.83rem}
.beginner-small{color:#71808c;font-size:.8rem}
.beginner-faq{display:grid;gap:9px}
.beginner-faq details{background:#fff;border:1px solid #e1e8ed;border-radius:12px;padding:14px 17px}
.beginner-faq summary{cursor:pointer;font-weight:800}.beginner-faq p{line-height:1.8;color:#516674}
.beginner-next{padding:25px;border-radius:20px;background:linear-gradient(120deg,#f3f5ff,#eafbf4);margin:30px 0}
.beginner-next h2{margin:0 0 14px;font-size:1.35rem}
.beginner-next>div{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.beginner-next a{display:grid;gap:6px;background:#fff;border-radius:12px;padding:16px;text-decoration:none;color:#233d4b}
.beginner-next small{color:#657989}
@media(max-width:760px){.beginner-hero{grid-template-columns:1fr;padding:20px;margin:12px 0}.beginner-hero img{height:190px}.beginner-summary{gap:6px}.beginner-summary>div{padding:10px}.beginner-summary strong{font-size:.8rem}.beginner-summary small{font-size:.68rem}.lesson-layout{grid-template-columns:1fr}.lesson-menu{grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-choice{grid-template-columns:28px 1fr;gap:6px;padding:9px}.lesson-choice>span:last-child{display:none}.lesson-choice .lesson-num{width:27px;height:27px;font-size:.7rem}.lesson-choice b{font-size:.78rem}.lesson-choice small{font-size:.65rem}.lesson-view{padding:17px}.practice-grid,.beginner-next>div{grid-template-columns:1fr}.beginner-copy h1{font-size:2.15rem}}

/* v14 visual editorial design shared across all four sites */
.visual-intro{margin:24px 0 30px;padding:20px;background:linear-gradient(135deg,#ffffff,#f6f3ff 58%,#effbf9);border:1px solid #e4e8f0;border-radius:24px;box-shadow:0 12px 30px #34426b0c}
.visual-intro-head{display:grid;grid-template-columns:1.25fr .75fr;gap:20px;align-items:center;margin-bottom:16px}
.visual-eyebrow{color:var(--accent,#7257d9);font-weight:900;font-size:.72rem;letter-spacing:.12em}
.visual-intro-head h2{font-size:clamp(1.35rem,2.8vw,1.9rem);line-height:1.35;margin:8px 0}
.visual-intro-head p{font-size:.9rem;color:#5a6d7a;line-height:1.65;margin:0}
.visual-intro-head img{width:100%;height:155px;object-fit:cover;border-radius:17px;box-shadow:0 9px 25px #31465c20}
.visual-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:11px}
.visual-step{display:flex;align-items:flex-start;gap:12px;background:#fff;border:1px solid #e7eaf0;border-radius:16px;padding:15px;min-width:0}
.visual-step-icon{flex:none;display:grid;place-items:center;width:44px;height:44px;border-radius:13px;background:var(--soft,#f2edff);font-size:1.35rem}
.visual-step-num{font-size:.68rem;font-weight:800;color:var(--accent,#715bd6);letter-spacing:.06em}
.visual-step h3{font-size:.98rem;margin:5px 0 5px;line-height:1.35;color:#243749}
.visual-step p{font-size:.79rem;line-height:1.6;color:#61717e;margin:0}
.section-icon{display:inline-grid;place-items:center;margin-right:9px;width:39px;height:39px;border-radius:12px;background:var(--soft,#eeeaff);font-size:1.1rem;vertical-align:middle}
.illustrated-panel{scroll-margin-top:95px}
@media(max-width:750px){.visual-intro{padding:14px;border-radius:18px}.visual-intro-head{grid-template-columns:1fr;gap:11px}.visual-intro-head img{height:155px}.visual-steps{grid-template-columns:1fr;gap:8px}.visual-step{padding:11px}.visual-step-icon{width:40px;height:40px}.visual-step p{font-size:.78rem}}