:root{--rose:#c9748a;--deep:#9f5066;--pink:#ec6f92;--pale:#f8e9ee;--mist:#fff7f9;--cream:#fffdfb;--ink:#392b30;--soft:#76656b;--line:#ead9df;--ok:#aa536c;--shadow:0 18px 50px rgba(104,48,67,.12)}
    *{box-sizing:border-box} html{scroll-behavior:smooth}
    body{margin:0;color:var(--ink);background:radial-gradient(circle at 8% 3%,#fdeff4 0,transparent 30rem),linear-gradient(180deg,#fff 0,#fff9fb 60%,#fff 100%);font-family:"Zen Maru Gothic","Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;line-height:1.75}
    button,input{font:inherit} button{cursor:pointer}
    .shell{width:min(1080px,calc(100% - 32px));margin:auto;padding:30px 0 80px}
    header{display:flex;align-items:center;justify-content:space-between;gap:18px;margin-bottom:28px}
    .brand{display:flex;align-items:center;gap:12px;color:var(--deep);font-weight:800;letter-spacing:.08em}.brand img{width:66px;height:58px;object-fit:contain}.tag{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 13px;color:var(--soft);font-size:.85rem}
    main{background:rgba(255,255,255,.91);border:1px solid var(--line);border-radius:34px;box-shadow:var(--shadow);overflow:hidden}
    .top{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 250px;align-items:center;gap:24px;padding:34px 48px 30px;background:linear-gradient(135deg,#fff 0,#fff2f6 100%);border-bottom:1px solid var(--line)}
    .top-copy{position:relative;z-index:1}.hero-mascot{width:100%;height:230px;object-fit:contain;filter:drop-shadow(0 14px 18px rgba(159,80,102,.16));animation:float 3.2s ease-in-out infinite}
    .eyebrow{color:var(--rose);font-weight:800;letter-spacing:.08em;margin:0 0 6px}.top h1{margin:0;font-family:"Hiragino Mincho ProN","Yu Mincho",serif;font-size:clamp(1.75rem,4vw,3rem);line-height:1.35}.lead{margin:10px 0 0;color:var(--soft);font-size:1.05rem}.case-meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:18px}.chip{background:#fff;border:1px solid var(--line);border-radius:999px;padding:5px 13px;font-weight:700;font-size:.92rem}
    .progress{height:5px;background:#f3e6ea}.progress>i{display:block;width:38%;height:100%;background:linear-gradient(90deg,var(--rose),#f19ab0);transition:width .45s ease}
    .content{padding:42px 48px}.section{margin:0 0 46px}.section:last-child{margin-bottom:0}.num{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--pale);color:var(--deep);font-weight:900;margin-right:8px}.section h2{display:flex;align-items:center;margin:0 0 18px;font-size:1.35rem}.note{color:var(--soft);margin:-8px 0 20px}
    .us-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.image-card{margin:0;padding:10px;background:#141114;border-radius:20px;overflow:hidden}.image-card img{display:block;width:100%;aspect-ratio:4/3;object-fit:contain}.image-card figcaption{color:#eadfe3;font-size:.84rem;padding:7px 5px 2px}
    details{margin-top:16px;border:1px solid var(--line);border-radius:18px;background:var(--mist);padding:0 18px}summary{padding:14px 0;font-weight:800;color:var(--deep);cursor:pointer}.video-wrap{padding:0 0 18px}video{display:block;width:100%;border-radius:14px;background:#000;max-height:580px}
    .prompt{background:linear-gradient(135deg,#fff6f9,#fff);border:1px solid var(--line);border-radius:22px;padding:24px}.prompt p{margin:0;font-weight:800}.hint{display:flex;gap:10px;flex-wrap:wrap;margin-top:13px}.hint span{border-bottom:2px dotted #d9a3b2;color:var(--soft)}
    fieldset{border:0;padding:0;margin:22px 0 0}.choices{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}.choice{position:relative}.choice input{position:absolute;opacity:0}.choice label{display:grid;place-items:center;min-height:74px;border:2px solid var(--line);border-radius:18px;background:#fff;font-size:1.35rem;font-weight:900;transition:.18s}.choice label small{display:block;font-size:.7rem;font-weight:600;color:var(--soft)}.choice input:checked+label{border-color:var(--rose);color:var(--deep);background:var(--pale);transform:translateY(-2px);box-shadow:0 8px 20px rgba(201,116,138,.16)}.choice input:focus-visible+label{outline:3px solid #f4afc0;outline-offset:3px}
    .actions{display:flex;align-items:center;gap:14px;margin-top:18px}.answer-btn{border:0;border-radius:999px;background:linear-gradient(135deg,var(--deep),var(--rose));color:#fff;padding:12px 28px;font-weight:900;box-shadow:0 8px 20px rgba(159,80,102,.22)}.answer-btn:hover{filter:brightness(1.05)}.answer-btn:disabled{opacity:.55;cursor:not-allowed}.status{color:var(--deep);font-weight:700}
    .result-feedback{display:none;margin:24px 0 18px;padding:14px;border:2px solid var(--line);border-radius:26px;text-align:center;overflow:hidden}.result-feedback.show{display:block;animation:pop .48s cubic-bezier(.2,.85,.32,1.25)}.result-feedback.is-correct{border-color:#f6b5c6;background:radial-gradient(circle at 50% 35%,#fff 0,#fff4f7 72%)}.result-feedback.is-incorrect{border-color:#e2cfd5;background:radial-gradient(circle at 50% 35%,#fff 0,#fbf5f7 72%)}.result-feedback img{display:block;width:min(100%,560px);max-height:440px;margin:auto;object-fit:contain;filter:drop-shadow(0 14px 22px rgba(111,36,62,.13))}
    .result{display:none;margin-top:28px;animation:rise .35s ease}.result.show{display:block}.correct{display:flex;align-items:center;gap:16px;background:linear-gradient(135deg,#9f5066,#d7839a);color:#fff;border-radius:24px;padding:22px 25px}.correct strong{font-size:1.42rem}.seal{display:grid;place-items:center;flex:0 0 54px;height:54px;background:#fff;color:var(--deep);border-radius:50%;font-size:1.7rem;font-weight:900}.explain{margin-top:16px;border:1px solid var(--line);border-radius:22px;padding:24px;background:#fff}.explain h3{margin:0 0 7px;color:var(--deep)}.explain p{margin:0}.diagnosis{margin-top:16px;background:var(--pale);border-radius:15px;padding:13px 16px;font-weight:900}
    .mammo{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:20px}.mammo figure{margin:0;background:#111;border-radius:20px;padding:12px}.mammo img{display:block;width:100%;height:420px;object-fit:contain}.mammo figcaption{color:#eee;text-align:center;padding-top:8px;font-size:.88rem}
    .mammo-note{display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center;margin-top:18px;border-left:5px solid var(--rose);background:var(--mist);padding:18px 20px;border-radius:0 18px 18px 0}.mammo-note p{margin:0}.mascot{width:110px;max-height:100px;object-fit:contain}
    .mammo-point{position:relative;display:grid;grid-template-columns:105px minmax(0,1fr);gap:18px;align-items:center;margin-top:18px;padding:18px 22px;background:#fff;border:2px solid #eab5c3;border-radius:22px;box-shadow:0 10px 28px rgba(159,80,102,.09)}.mammo-point:before{content:"";position:absolute;left:87px;top:-10px;width:18px;height:18px;background:#fff;border-left:2px solid #eab5c3;border-top:2px solid #eab5c3;transform:rotate(45deg)}.mammo-point img{position:relative;width:100px;height:100px;object-fit:contain}.mammo-point b{display:inline-block;margin-bottom:5px;color:var(--deep);font-size:.85rem;letter-spacing:.1em}.mammo-point p{margin:0;font-weight:800;line-height:1.7}.mammo-point em{font-style:normal;color:var(--deep);background:linear-gradient(transparent 64%,#f8dce4 64%)}
    .point{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 190px;align-items:center;gap:18px;overflow:hidden;background:linear-gradient(135deg,#a92650,#e65a83);color:#fff;border-radius:25px;padding:24px 28px 18px}.point:after{content:"";position:absolute;right:-55px;top:-85px;width:210px;height:210px;border:34px solid rgba(255,255,255,.09);border-radius:50%}.point-copy{position:relative;z-index:2}.point b{display:block;font-size:.9rem;letter-spacing:.12em;margin-bottom:8px}.point p{margin:0;font-size:clamp(1.12rem,2.5vw,1.45rem);font-weight:900;line-height:1.65;max-width:760px}.point-mascot{position:relative;z-index:2;width:190px;height:150px;object-fit:contain;filter:drop-shadow(0 10px 16px rgba(73,9,29,.25))}.reset{margin-top:18px;border:1px solid var(--line);background:#fff;color:var(--deep);border-radius:999px;padding:9px 18px;font-weight:800}
    footer{text-align:center;color:var(--soft);font-size:.82rem;padding:24px 16px}.disclaimer{margin-top:20px;color:var(--soft);font-size:.8rem}
    @keyframes rise{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}@keyframes pop{from{opacity:0;transform:scale(.82)}to{opacity:1;transform:scale(1)}}@keyframes float{0%,100%{transform:translateY(0) rotate(-1deg)}50%{transform:translateY(-7px) rotate(1deg)}}
    @media(max-width:720px){.shell{width:min(100% - 18px,1080px);padding-top:16px}.tag{display:none}.top{grid-template-columns:minmax(0,1fr) 120px;gap:5px}.top,.content{padding:28px 20px}.hero-mascot{height:145px}.us-grid,.mammo{grid-template-columns:1fr}.choices{grid-template-columns:repeat(5,1fr);gap:6px}.choice label{min-height:62px;border-radius:14px}.mammo img{height:340px}.mammo-note{grid-template-columns:1fr}.mascot{display:none}.mammo-point{grid-template-columns:82px 1fr;padding:16px}.mammo-point:before{left:66px}.mammo-point img{width:78px;height:82px}.correct{align-items:flex-start}.actions{align-items:flex-start;flex-direction:column}.result-feedback{padding:10px}.result-feedback img{max-height:340px}.point{grid-template-columns:1fr 105px;padding:22px 18px}.point-mascot{width:115px;height:120px}}
    @media(max-width:470px){.top{display:block}.hero-mascot{position:absolute;right:4px;bottom:8px;width:105px;height:105px;opacity:.3}.top-copy{padding-right:12px}.result-feedback img{max-height:280px}.point{grid-template-columns:1fr}.point-mascot{justify-self:end;margin-top:-18px}}

/* ===== 一覧ページ・症例ナビ（追加分） ===== */
a.tag{text-decoration:none}
.filter{display:flex;gap:8px;flex-wrap:wrap;margin:0 0 26px}
.filter-btn{border:1px solid var(--line);background:#fff;color:var(--soft);border-radius:999px;padding:7px 16px;font-weight:700}
.filter-btn.on{background:var(--deep);border-color:var(--deep);color:#fff}
.case-list{display:grid;gap:16px}
.case-card{display:grid;grid-template-columns:132px 1fr;gap:18px;align-items:center;padding:14px;border:1px solid var(--line);border-radius:22px;background:#fff;text-decoration:none;color:inherit;transition:.18s}
.case-card:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(159,80,102,.13);border-color:var(--rose)}
.case-thumb{display:block;background:#141114;border-radius:16px;overflow:hidden}
.case-thumb img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover}
.case-body{display:block}
.case-no{display:block;color:var(--rose);font-weight:800;font-size:.82rem;letter-spacing:.08em;margin-bottom:5px}
.case-title{display:block;font-family:"Hiragino Mincho ProN","Yu Mincho",serif;font-size:1.12rem;line-height:1.5;margin-bottom:7px}
.case-meta-line{display:block;color:var(--soft);font-size:.88rem}
.case-nav{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:24px;padding-top:20px;border-top:1px solid var(--line)}
.case-nav a{color:var(--deep);font-weight:800;text-decoration:none}
.case-nav a:hover{text-decoration:underline}
.case-nav .to-index{color:var(--soft)}
@media (max-width:640px){
  .case-card{grid-template-columns:96px 1fr;gap:12px}
  .case-nav{font-size:.9rem}
}

/* ===== 一覧：会員限定表示（サムネなし） ===== */
.gate-notice{display:flex;gap:12px;align-items:flex-start;margin:0 0 22px;padding:14px 18px;border:1px solid var(--line);border-radius:16px;background:#fdf6f8;color:var(--soft)}
.gate-notice svg{flex:none;margin-top:2px;color:var(--rose)}
.gate-notice p{margin:0;font-size:.9rem;line-height:1.75}
.case-card{grid-template-columns:86px 1fr auto}
.case-lock{display:grid;place-items:center;gap:2px;width:86px;height:86px;border-radius:18px;background:#fbeef2;color:var(--deep)}
.case-lock em{font-style:normal;font-weight:800;font-size:.82rem;letter-spacing:.06em}
.case-go{align-self:center;white-space:nowrap;color:var(--rose);font-weight:800;font-size:.84rem}
@media (max-width:640px){
  .case-card{grid-template-columns:64px 1fr}
  .case-lock{width:64px;height:64px;border-radius:14px}
  .case-go{display:none}
}