/* Monthly case-study LP. One central column; text, spacing and alignment share one scale. */
html{scroll-behavior:smooth;scroll-padding-top:20px}
body.case-study-page{margin:0;background:#eaf2f3;color:#123950;font-family:'Hiragino Kaku Gothic ProN','Yu Gothic',Meiryo,sans-serif;font-size:14px;line-height:1.95;-webkit-font-smoothing:antialiased}
.case-study-page *{box-sizing:border-box}
.case-study-page img{display:block;max-width:100%;height:auto}
.case-study-page a{color:inherit}
.case-study-page h1,.case-study-page h2,.case-study-page h3,.case-study-page p{margin:0}
.case-study-page a:focus-visible,.case-study-page summary:focus-visible,.cs-steps:focus-visible{outline:3px solid #0787a4;outline-offset:4px}
.cs-shell{--cs-gutter:24px;--cs-space:44px;--cs-copy:14px;width:100%;max-width:480px;margin:auto;background:#fffef8;box-shadow:0 0 70px #1a536e12;overflow:clip}
.cs-skip{position:fixed;top:-100px;left:10px;background:white;padding:12px;z-index:1000}.cs-skip:focus{top:0}
/* Header retains the school's mobile logo dimensions and gutters. */
.case-study-page .cs-header.school-header{position:relative;top:auto;left:auto;width:100%;padding:0;background:#fffef8;z-index:5;box-shadow:none}
.cs-header .school-header__inner{display:flex;align-items:center;justify-content:space-between;min-height:78px;width:calc(100% - 32px);margin:auto;gap:24px}
.cs-header .cs-brand{display:block;line-height:normal;flex:0 0 auto;text-decoration:none}
.cs-header .cs-brand .wordmark__image{width:154px;height:auto;filter:brightness(0) saturate(100%) invert(32%) sepia(55%) saturate(1031%) hue-rotate(151deg) brightness(91%) contrast(98%)}
.cs-menu summary{list-style:none;cursor:pointer;width:46px;height:46px;border:0;border-radius:50%;display:flex;flex-direction:column;justify-content:center;align-items:center;gap:6px;background:white;box-shadow:0 4px 24px #2347560b}
.cs-menu summary::-webkit-details-marker{display:none}.cs-menu summary span{width:20px;height:2px;background:#087e9c}
.cs-menu nav{position:absolute;top:100%;left:20px;right:20px;background:#fffef8;padding:10px 20px;box-shadow:0 12px 25px #12395020;border-radius:0 0 14px 14px}
.cs-menu nav a{display:block;text-decoration:none;border-bottom:1px solid #e6edef;padding:10px 0;font-size:14px}
/* Opening: one heading group, one combined character illustration, one information card. */
.cs-hero{position:relative;isolation:isolate;padding:8px var(--cs-gutter) 0;text-align:center;background:#fffef8;color:#07374d}
.cs-hero:before,.cs-hero:after{content:'';position:absolute;border-radius:50%;background:#dff3f3;z-index:-1;pointer-events:none}
.cs-hero:before{width:150px;height:150px;left:-110px;top:210px}.cs-hero:after{width:250px;height:140px;right:-170px;top:380px;transform:rotate(-28deg)}
.cs-event-heading{display:flex;align-items:center;justify-content:center;gap:7px;min-width:0}
.cs-kicker{font-size:clamp(10px,2.95vw,13px);font-weight:700;letter-spacing:0;line-height:1.7;white-space:nowrap}
.cs-volume{display:inline-block;flex:none;padding:2px 8px;border-radius:20px;background:#ffdf57;color:#07374d;font-size:11px;line-height:1.5;font-weight:800;white-space:nowrap}
.cs-reference-heading{margin-top:13px}
.cs-hero h1.cs-theme-title{font-size:clamp(23px,6.5vw,29px);line-height:1.55;letter-spacing:-.035em;font-weight:900;text-align:center;margin:0}
.cs-theme-first{display:inline-block;font-size:clamp(18px,5.6vw,25px);letter-spacing:-.045em;white-space:nowrap}
.cs-theme-title small{font-size:15px;letter-spacing:.025em;line-height:1.7}
.cs-theme-title mark{color:inherit;background:linear-gradient(transparent 78%,#ffe88a 0);padding:0}
.cs-reference-lead{font-size:13px;line-height:1.85;letter-spacing:.04em;margin:13px auto 0!important;max-width:30em}
.cs-case-art{position:relative;width:100%;max-width:350px;height:315px;margin:12px auto 0}
.cs-case-halo{position:absolute;left:10px;top:48px;width:205px;height:245px;border-radius:48% 52% 45% 55%;background:#fff5d9}
.cs-reference-person{position:absolute;left:17px;bottom:0;width:209px;height:310px;overflow:hidden;z-index:2}
.cs-reference-person img{width:310px;max-width:none;height:auto;margin:0 0 0 -49px}
.cs-check-lens{position:absolute;right:0;top:111px;width:201px;height:201px;border:7px solid #357d91;border-radius:50%;background:#fffffc;box-shadow:inset 0 0 0 4px #d7eff0;z-index:3;display:flex;align-items:center;justify-content:center;text-align:left}
.cs-check-lens:after{content:'';position:absolute;right:0;bottom:-24px;width:17px;height:42px;border:2px solid #458ca0;border-radius:5px;background:#357d91;transform:rotate(-43deg);z-index:-1}
.cs-lens-inner{width:151px}
.cs-lens-label{font-size:10px;line-height:1.7;color:white;background:#0787a4;border-radius:20px;padding:2px 5px;font-weight:700;text-align:center;white-space:nowrap;margin-bottom:7px!important}
.cs-check-lens ul{padding:0;margin:0;list-style:none}
.cs-check-lens li{font-size:10px;line-height:1.65;font-weight:700;position:relative;padding-left:19px;overflow-wrap:anywhere}
.cs-check-lens li+li{margin-top:6px;border-top:1px dashed #b9dade;padding-top:6px}
.cs-check-lens li:before{content:'✓';position:absolute;left:0;top:1px;font-size:18px;line-height:1;color:#f4c543}
.cs-check-lens li+li:before{top:7px}
.cs-quick-info{position:relative;z-index:4;margin:15px auto 0;padding:17px 16px;border-radius:18px;background:#fff;box-shadow:0 7px 24px #204c570a;text-align:left;width:100%}
.cs-quick-info>div{display:flex;align-items:center;gap:8px}.cs-quick-info>div+div{margin-top:8px}
.cs-quick-label{font-size:10px;flex:0 0 78px;text-align:center;background:#fff0ec;color:#b35c55;border-radius:20px;padding:3px 4px;font-weight:700;white-space:nowrap}
.cs-quick-info>div:nth-child(2) .cs-quick-label{background:#eaf2ff;color:#326bc1}
.cs-quick-info>div>p{font-size:12px;line-height:1.65;font-weight:700;letter-spacing:-.035em}
.cs-quick-price{font-size:12px;line-height:1.7;border-top:1px solid #e1e9e9;margin-top:12px!important;padding-top:11px}
.cs-quick-price b{font-size:19px;letter-spacing:0}.cs-quick-price small{font-size:10px}.cs-quick-price>span{display:block;font-size:10px;color:#617a84;margin-top:4px}
/* Every CTA shares the same central text axis. Existing href / disabled state is untouched. */
.case-study-page .cs-cta{position:relative;display:flex;align-items:center;justify-content:center;width:100%;max-width:360px;min-height:52px;margin:16px auto 0;padding:13px 12px;border:0;border-radius:32px;background:linear-gradient(100deg,#ffde53,#ffe76d,#ffdc4c);color:#123950;font-family:inherit;font-size:16px;font-weight:800;line-height:1.5;text-align:center;text-decoration:none;box-shadow:0 4px 0 #e6cb7018;cursor:pointer;transition:filter .2s}
.cs-cta:hover{filter:brightness(1.03)}.cs-cta>span{display:none}.cs-cta:disabled{opacity:1;cursor:default}
/* Shared section rhythm. Headings and visual elements sit on the same central axis. */
.cs-section{padding:var(--cs-space) var(--cs-gutter) 0;scroll-margin-top:20px;text-align:center}
.cs-eyebrow{font-size:11px;letter-spacing:.16em;color:#008fae;font-weight:700;line-height:1.6;margin:0 auto 7px!important;text-align:center}
.cs-section h2{font-size:24px;line-height:1.55;letter-spacing:.025em;font-weight:800;text-align:center}
.cs-underline{background:linear-gradient(transparent 82%,#ffe05a 0);padding-bottom:2px}
.cs-body-copy{max-width:32em;margin:21px auto 0;text-align:center}
.cs-body-copy p{font-size:var(--cs-copy);line-height:1.95;overflow-wrap:break-word}
.cs-body-copy p+p{margin-top:16px}.cs-body-copy p:nth-child(2){margin-top:6px}
.cs-character{background:#eaf8fc;border-radius:24px;margin:var(--cs-space) 16px 0;padding:26px 20px}
.cs-character-portrait{height:205px;width:220px;overflow:hidden;position:relative;margin:20px auto;background:#ffed99;border-radius:110px 110px 30px 30px}
.cs-character-portrait img{width:210px;margin:0 auto}.cs-character-portrait>span{position:absolute;right:14px;top:15px;font-size:56px;color:#4996e0;font-weight:900;transform:rotate(12deg)}
.cs-checklist{width:100%;max-width:340px;padding:4px 14px;margin:0 auto;list-style:none;background:#ffffff9c;border-radius:14px;text-align:left}
.cs-checklist li{position:relative;padding:11px 0 11px 24px;font-size:13px;line-height:1.85;border-bottom:1px solid #d3eaf3;overflow-wrap:break-word}
.cs-checklist li:last-child{border:0}.cs-checklist li:before{content:'✓';position:absolute;left:0;top:13px;color:#3995ae;font-size:18px;font-weight:800;line-height:1}
.cs-section-lead{font-size:13px;line-height:1.85;margin:12px auto 0!important;color:#617c8a;text-align:center}
.cs-swipe-hint{display:flex;justify-content:flex-end;gap:12px;font-size:11px;color:#59818d;margin:14px 0 9px!important}
.cs-steps{display:flex;gap:12px;overflow-x:auto;scroll-snap-type:x mandatory;overscroll-behavior-x:contain;padding:1px 1px 14px;margin:0;list-style:none;scrollbar-width:thin;scrollbar-color:#89bfcb #edf5f5;text-align:left}
.cs-steps li{position:relative;display:flex;flex:0 0 82%;min-width:0;min-height:223px;flex-direction:column;align-items:flex-start;gap:13px;padding:20px;border:1px solid #deebed;border-radius:18px;background:#f0f9fa;scroll-snap-align:start}
.cs-steps li:nth-child(even){background:#fff9e6;border-color:#eee8cf}.cs-step-index{position:absolute;top:14px;right:17px;font:italic 21px Georgia,serif;color:#6d9eac}
.cs-step-icon{display:grid;place-items:center;width:48px;height:48px;border-radius:50%;background:white;color:#2985a0}.cs-step-icon svg{width:29px;height:29px}
.cs-steps h3{font-size:15px;line-height:1.65}.cs-steps li p{font-size:12px;line-height:1.85;color:#657f89;margin-top:7px}
.cs-duration{margin:auto 0 0;color:#2985a0;white-space:nowrap;font-size:11px}.cs-duration b{font-size:24px;margin-right:3px}
.cs-host-photo{width:104px!important;height:104px!important;object-fit:cover;object-position:72% 42%;border-radius:50%;margin:21px auto 12px}
.cs-host-name{font-size:19px;font-weight:600;line-height:1.5;text-align:center}.cs-host-name span{display:block;font-size:11px;font-weight:500;color:#607987;letter-spacing:.06em;margin:5px 0 18px}
.cs-host>p:not(.cs-eyebrow):not(.cs-host-name){max-width:32em;margin:0 auto;font-size:var(--cs-copy);line-height:1.95;text-align:center}
.cs-overview{padding-bottom:36px}.cs-overview dl{margin:20px auto 0;text-align:left}.cs-overview dl>div{padding:15px 0;border-top:1px solid #dce6e8}
.cs-overview dt{font-size:12px;color:#008eaa;font-weight:700;letter-spacing:.06em;margin-bottom:6px}.cs-overview dd{margin:0;font-size:var(--cs-copy);line-height:1.95}.cs-overview dd b{font-size:12px}.cs-muted{font-size:12px;color:#627985;line-height:1.7}
.cs-map{margin-top:8px;border-radius:15px;overflow:hidden;background:#e7eff0}.cs-map iframe{display:block;width:100%;height:220px;border:0}.cs-map>a{display:flex;justify-content:space-between;text-decoration:none;font-size:12px;padding:10px 15px;background:#e5f2f6}
.cs-notice{background:#fff0ec;border-radius:12px;font-size:12px;line-height:1.9;padding:15px 17px;margin:20px 0 0!important;color:#725655;text-align:left}.cs-notice b{display:block;color:#ba625c;margin-bottom:4px}
.cs-line-caption{text-align:center;font-size:13px;margin:22px auto 0!important}.cs-line-cta{width:100%}
.cs-footer{padding:28px var(--cs-gutter);text-align:center;border-top:1px solid #e3e9e6}.cs-footer img{width:200px;margin:auto}.cs-footer small{display:block;font-size:10px;color:#71848a;margin-top:18px}
@media(min-width:700px){body.case-study-page{background:radial-gradient(circle at 15% 20%,#d8edf0,transparent 40%),#edf2f1;background-attachment:fixed}.cs-shell{margin:28px auto;border-radius:18px}}
@media(max-width:360px){.cs-shell{--cs-gutter:20px;--cs-space:38px}.cs-event-heading{gap:5px}.cs-kicker{font-size:10px}.cs-volume{font-size:10px;padding:2px 6px}.cs-theme-first{font-size:18px}.cs-case-art{height:303px}.cs-reference-person{left:0;width:191px;height:298px}.cs-reference-person img{width:290px;margin-left:-46px}.cs-check-lens{width:190px;height:190px;top:110px;right:-2px}.cs-lens-inner{width:141px}.cs-check-lens li{font-size:9.5px}.cs-lens-label{font-size:9px}.cs-quick-info{padding:15px 12px}.cs-quick-label{font-size:9px;flex-basis:67px}.cs-quick-info>div{gap:6px}.cs-quick-info>div>p{font-size:10.5px}.cs-section h2{font-size:23px}.cs-character{padding:24px 16px}.cs-checklist{padding-inline:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.cs-cta{transition:none}}

/* PROGRAM only: three visible steps, no carousel. */
.cs-flow-three{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px;padding:0;margin:18px 0 0;list-style:none;text-align:center}
.cs-flow-three li{min-width:0;position:relative;padding:12px 2px 11px;border:1px solid #deebed;border-radius:12px;background:#f0f9fa}
.cs-flow-three li:nth-child(2){background:#fff9e6;border-color:#eee8cf}
.cs-flow-icon{display:grid;place-items:center;width:34px;height:34px;margin:0 auto 9px;color:#2985a0;border-radius:50%;background:white}
.cs-flow-icon svg{width:23px;height:23px}
.cs-flow-three h3{font-size:10px;font-weight:700;line-height:1.7;letter-spacing:-.055em;white-space:nowrap;text-align:center}
.cs-flow-three li p{font-size:9px;line-height:1.8;letter-spacing:-.04em;margin-top:4px;color:#617c8a;text-align:center;white-space:nowrap}
.cs-flow-note{font-size:11px;line-height:1.85;text-align:center;margin:12px auto 0!important;max-width:30em;color:#617c8a}
@media(min-width:420px){.cs-flow-three{gap:9px}.cs-flow-three h3{font-size:12px}.cs-flow-three li p{font-size:10px}}
@media(max-width:340px){.cs-flow-three{gap:4px}.cs-flow-three h3{font-size:9px}.cs-flow-three li p{font-size:8px}}

/* Series identity is permanent; the episode title and illustration remain replaceable. */
.cs-hero h1.cs-series-logo{font-size:clamp(42px,12vw,56px);font-weight:800;line-height:1.3;letter-spacing:.035em;color:#123950;text-align:center;margin:0 auto 13px;white-space:nowrap}
.cs-series-question{color:#0787a4;display:inline-block;transform:rotate(7deg)}
.cs-series-intro{max-width:32em;margin:0 auto;text-align:center}
.cs-series-intro .cs-series-hook{font-size:15px;font-weight:700;line-height:1.8;margin-bottom:8px}
.cs-series-intro>p:not(.cs-series-hook){font-size:13px;line-height:1.85}
.cs-episode{margin:20px auto 0;max-width:350px;text-align:center}
.cs-episode-label{display:flex;align-items:center;justify-content:center;gap:9px;font-size:11px;font-weight:700;line-height:1.7;color:#31798c}
.cs-episode-label>.cs-volume{font-size:11px}
.cs-hero h2.cs-episode-title{font-size:19px;font-weight:800;line-height:1.75;letter-spacing:.005em;text-align:center;margin:10px auto 0;text-wrap:pretty}
.cs-hero .cs-case-art{margin-top:8px}
@media(max-width:360px){.cs-hero h1.cs-series-logo{font-size:40px}.cs-series-intro .cs-series-hook{font-size:13px}.cs-series-intro>p:not(.cs-series-hook){font-size:12px}.cs-hero h2.cs-episode-title{font-size:18px}}

/* Episode title's authored two-line break. Illustration geometry remains unchanged. */
.cs-hero h2.cs-episode-title{font-size:clamp(18px,4.9vw,21px);line-height:1.7;letter-spacing:0}
.cs-check-lens li{line-height:1.7}.cs-check-lens li+li{margin-top:7px;padding-top:7px}

.cs-check-lens li{text-wrap:balance;min-height:29px}.cs-check-lens li+li{margin-top:5px;padding-top:5px}

/* Magnifier typography only: equal-height single-line observation rows. */
.cs-check-lens .cs-lens-inner{width:166px;max-width:calc(100% - 15px)}
.cs-check-lens .cs-lens-label{margin-bottom:8px!important}
.cs-check-lens ul{margin:0;padding:0}
.cs-check-lens li,.cs-check-lens li+li{display:flex;align-items:center;min-height:0;height:32px;margin:0;padding:0 0 0 14px;font-size:9.5px;line-height:1.4;letter-spacing:-.025em;white-space:nowrap;text-wrap:nowrap;border-top:0}
.cs-check-lens li+li{border-top:1px dashed #b9dade}
.cs-check-lens li:before,.cs-check-lens li+li:before{top:50%;transform:translateY(-50%);font-size:15px}
@media(max-width:360px){.cs-check-lens .cs-lens-inner{width:156px}.cs-check-lens li,.cs-check-lens li+li{font-size:9px;height:31px;padding-left:13px}}

.cs-quick-info>div>p{font-size:15px;white-space:nowrap;letter-spacing:-.035em}
@media(max-width:360px){.cs-quick-info>div>p{font-size:13.5px}}

/* Balance Japanese prose to avoid isolated final characters on narrow screens. */
.cs-body-copy p,.cs-host>p:not(.cs-eyebrow):not(.cs-host-name),.cs-checklist li,.cs-notice{text-wrap:pretty;line-break:strict;word-break:normal;overflow-wrap:normal}
@supports(text-wrap:balance){.cs-body-copy p,.cs-host>p:not(.cs-eyebrow):not(.cs-host-name),.cs-checklist li,.cs-notice{text-wrap:balance}}