:root{
  --ink:#17141f;
  --ink-soft:#3c3750;
  --paper:#fbf7ec;
  --washi:#f3ecdb;
  --washi-line:#e2d7bd;
  --vermillion:#b23427;
  --vermillion-dark:#93301f;
  --gold:#c9a227;
  --gold-soft:#e8c877;
  --family:#8066cf;
  --family-dark:#3f347e;
  --family-soft:#eee9ff;
  --family-accent:#ffc857;
  --family-accent-soft:#fff0c7;
  --serif:"Hiragino Mincho ProN","Hiragino Mincho Pro","Songti SC","Noto Serif CJK SC","Noto Serif SC",serif;
  --sans:"Hiragino Sans","Hiragino Kaku Gothic ProN","PingFang SC","Noto Sans CJK SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--washi)}
button{font-family:inherit;cursor:pointer}
img{display:block}
[hidden]{display:none!important}

/* ---------- topbar ---------- */
.topbar{position:sticky;top:0;z-index:30;background:#12101a;color:#f5efe0;padding:10px 18px;display:flex;align-items:center}
.brand{display:flex;align-items:center;gap:10px}
.brand-seal{width:22px;height:22px;border-radius:6px;background:var(--vermillion);position:relative;flex:none}
.brand-seal::after{content:"";position:absolute;inset:4px;border:2px solid var(--gold-soft);border-radius:50%}
.brand-word{display:flex;flex-direction:column;line-height:1.15}
.brand-word strong{font-family:var(--serif);font-size:15px;letter-spacing:.08em}
.brand-word small{font-size:10px;opacity:.65;letter-spacing:.14em}

/* ---------- screens ---------- */
.screen{display:none;min-height:calc(100vh - 45px)}
.screen.active{display:block}

/* ---------- intro / flip: dark ink, faint vertical fibres (no seigaiha) ---------- */
#intro,#flip{background:
  radial-gradient(ellipse 90% 55% at 50% -5%,rgba(201,162,39,.14),transparent 60%),
  repeating-linear-gradient(90deg,rgba(245,239,224,.028) 0 1px,transparent 1px 7px),
  repeating-linear-gradient(90deg,rgba(245,239,224,.016) 0 1px,transparent 1px 23px),
  #12101a;
  color:#f5efe0}
.hero{max-width:560px;margin:0 auto;padding:44px 22px 56px;text-align:center}
.eyebrow{font-size:12px;letter-spacing:.28em;color:var(--gold-soft);margin:0 0 14px}
.hero h1{font-family:var(--serif);font-size:clamp(38px,9vw,54px);letter-spacing:.06em;margin:0 0 14px;font-weight:700}
.hook{font-size:15px;line-height:1.8;color:rgba(245,239,224,.82);margin:0 auto 30px;max-width:26em}
.hero-card-wrap{display:flex;justify-content:center;margin-bottom:32px}
.hero-cardback{width:min(272px,64vw);height:auto;border-radius:12px;border:2px solid rgba(201,162,39,.75);box-shadow:0 34px 64px rgba(0,0,0,.62),0 8px 22px rgba(0,0,0,.5)}
.primary-btn{background:var(--vermillion);color:#fff8ec;border:2px solid var(--vermillion-dark);border-radius:999px;padding:13px 28px;font-size:16px;font-weight:700;letter-spacing:.04em;box-shadow:0 6px 18px rgba(179,52,39,.35);transition:transform .15s,background .15s}
.primary-btn:hover:not(:disabled){background:#c23c2b;transform:translateY(-1px)}
.primary-btn:disabled{opacity:.38;cursor:not-allowed;box-shadow:none}
.cta{font-size:18px;padding:15px 40px}
.micro{font-size:12px;color:#8a8474}
.micro.light{color:rgba(245,239,224,.55)}
.hero-links{margin-top:30px;display:flex;justify-content:center;align-items:center;gap:10px}
.text-link{background:none;border:none;color:var(--gold-soft);font-size:14px;text-decoration:underline;text-underline-offset:4px;padding:4px 2px}
.hero-links .dot{color:rgba(245,239,224,.35)}

/* ---------- quiz: washi light ---------- */
#quiz,#result,#dex{background:
  repeating-linear-gradient(90deg,rgba(23,20,31,.02) 0 1px,transparent 1px 9px),
  var(--washi)}
.quiz-shell{max-width:880px;margin:0 auto;padding:26px 18px 60px}
.progress-head{display:flex;justify-content:space-between;font-size:12px;letter-spacing:.18em;color:var(--ink-soft);margin-bottom:8px}
.progress-row{display:flex;gap:6px;margin-bottom:18px}
.progress-segment{flex:1;height:5px;border-radius:3px;background:#ddd2b8}
.progress-segment.done{background:var(--vermillion)}
.question-card{background:var(--paper);border:1.5px solid var(--ink);border-radius:16px;box-shadow:0 14px 34px rgba(23,20,31,.12);padding:26px 24px 22px}
.question-head{display:flex;justify-content:space-between;gap:14px;align-items:flex-start;margin-bottom:18px}
.question-head h2{font-family:var(--serif);font-size:24px;margin:0 0 6px}
.question-head p{margin:0;color:var(--ink-soft);font-size:13px;line-height:1.6}
.step-stamp{flex:none;font-size:10px;letter-spacing:.16em;color:var(--vermillion);border:1.5px solid var(--vermillion);border-radius:6px;padding:5px 7px;transform:rotate(3deg);font-weight:700}
.family-block{margin-bottom:22px}
.family-title{display:flex;align-items:center;gap:9px;font-size:14px;margin:0 0 10px;font-family:var(--serif)}
.family-title::before{content:"";width:26px;height:9px;border-radius:3px;background:var(--group-color)}
.mbti-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.mbti-card{background:#fff;border:2px solid #d9cfb2;border-radius:12px;padding:8px 8px 10px;text-align:center;transition:border-color .15s,transform .15s,box-shadow .15s}
.mbti-card img{width:100%;height:auto;border-radius:7px}
.mbti-card .mbti-meta{margin-top:8px;display:flex;flex-direction:column;gap:2px}
.mbti-card .mbti-meta strong{font-size:16px;letter-spacing:.06em}
.mbti-card .mbti-meta small{font-size:11px;color:var(--ink-soft)}
.mbti-card:hover{transform:translateY(-2px)}
.mbti-card.selected{border-color:var(--group-color);box-shadow:0 0 0 2px var(--group-color),0 10px 22px rgba(23,20,31,.16)}
.why-row{margin-top:4px;text-align:center}
.why-link{background:none;border:none;color:var(--vermillion);font-size:14px;text-decoration:underline;text-underline-offset:4px;padding:6px 4px}
.choice-section{margin-bottom:20px}
.choice-label{display:flex;justify-content:space-between;align-items:baseline;margin-bottom:10px}
.choice-label h3{font-family:var(--serif);font-size:17px;margin:0}
.choice-label span{font-size:11px;color:var(--ink-soft)}
.choice-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.choice-grid.three{grid-template-columns:repeat(3,1fr)}
.field-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.choice-card,.field-card{position:relative;background:#fff;border:2px solid #d9cfb2;border-radius:12px;padding:16px 14px 13px;text-align:left;display:flex;flex-direction:column;gap:4px;transition:border-color .15s,box-shadow .15s}
.choice-card::before,.field-card::before{content:"";position:absolute;top:0;left:14px;right:14px;height:5px;border-radius:0 0 4px 4px;background:var(--field-color,#e7dcc0)}
.choice-card strong,.field-card strong{font-size:16px;margin-top:4px}
.choice-card small,.field-card small{font-size:12px;color:var(--ink-soft);line-height:1.55}
.choice-card .emoji,.field-card .emoji{font-size:20px}
.choice-card.selected,.field-card.selected{border-color:var(--vermillion);box-shadow:0 0 0 1.5px var(--vermillion),0 8px 18px rgba(23,20,31,.12)}
.choice-card.selected::after,.field-card.selected::after{content:"";position:absolute;top:10px;right:12px;width:10px;height:10px;border-radius:50%;background:var(--vermillion)}
.quiz-actions{display:flex;justify-content:space-between;align-items:center;margin-top:20px}
.text-btn{background:none;border:none;color:var(--ink-soft);font-size:14px;padding:8px 4px}
.text-btn:disabled{opacity:.35;cursor:not-allowed}

/* ---------- flip ---------- */
.flip-shell{max-width:560px;margin:0 auto;padding:40px 22px 56px;text-align:center}
.flip-stage{width:min(300px,68vw);margin:0 auto 26px;perspective:1200px;cursor:pointer}
.flip-inner{position:relative;width:100%;aspect-ratio:1000/1636;transform-style:preserve-3d;transition:transform 1.2s cubic-bezier(.3,.7,.3,1)}
.flip-inner.flipped{transform:rotateY(180deg)}
.flip-face{position:absolute;inset:0;backface-visibility:hidden;-webkit-backface-visibility:hidden}
.flip-face img{width:100%;height:100%;object-fit:cover;border-radius:12px;border:2px solid rgba(201,162,39,.75);box-shadow:0 30px 58px rgba(0,0,0,.6)}
.flip-back{transform:rotateY(180deg)}
.flip-title{font-family:var(--serif);font-size:22px;margin:0 0 8px}
.flip-copy{color:rgba(245,239,224,.75);font-size:14px;margin:0 0 14px;min-height:1.5em}

/* ---------- result ---------- */
.result-wrap{max-width:880px;margin:0 auto;padding:26px 18px 70px}
.result-kicker{text-align:center;font-size:11px;letter-spacing:.3em;color:var(--ink-soft);margin:0 0 14px}
.result-panel{background:var(--paper);border:1.5px solid var(--ink);border-radius:18px;box-shadow:0 18px 40px rgba(23,20,31,.14);padding:28px 28px 24px}
.result-hero{display:flex;gap:26px;align-items:flex-start}
.result-card-img{width:218px;height:auto;flex:none;border-radius:10px;border:2px solid #14101d;box-shadow:0 16px 32px rgba(23,20,31,.28)}
.result-heading{flex:1;min-width:0}
.result-tags{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:12px}
.result-tags span{font-size:12px;background:var(--family-soft);color:var(--family-dark);border-radius:999px;padding:4px 11px;font-weight:600}
.result-label{margin:0 0 4px;font-size:14px;color:var(--ink-soft)}
.result-label strong{font-size:19px;color:var(--ink);letter-spacing:.05em;margin-right:6px}
.result-school{font-family:var(--serif);font-weight:700;margin:0;line-height:1.15;white-space:nowrap}
.result-major{font-size:15px;margin:10px 0 0;color:var(--ink)}
.match-row{display:flex;align-items:center;gap:12px;margin-top:12px}
.match-score{font-family:var(--serif);font-size:38px;font-weight:700;color:var(--vermillion)}
.match-copy{font-size:11px;color:var(--ink-soft);line-height:1.5}
.yokai-tag{display:inline-block;margin:14px 0 0;font-size:13px;background:#f3e8cd;border:1px solid var(--gold);color:#6d5510;border-radius:999px;padding:5px 12px}
.result-heading .why-link{display:block;padding-left:0}
.verdict{font-family:var(--serif);font-size:clamp(21px,4.6vw,27px);line-height:1.55;font-weight:700;margin:26px 0 0;padding-top:22px;border-top:1px solid var(--washi-line)}
.reason-line{font-size:14px;color:var(--ink-soft);line-height:1.7;margin:12px 0 0}
.result-panel .micro{margin:10px 0 0}
.tagline{margin:16px 0 0;padding-top:14px;border-top:1px dashed var(--washi-line);font-size:12.5px;color:var(--ink-soft);letter-spacing:.03em}
.pitfall{display:flex;gap:10px;margin-top:18px;background:#fdf3e3;border:1px solid #ecd9ae;border-radius:12px;padding:13px 15px}
.pitfall b{font-size:13px}
.pitfall p{margin:3px 0 0;font-size:13px;line-height:1.65;color:var(--ink-soft)}
.result-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.share-btn{background:var(--vermillion);color:#fff8ec;border:2px solid var(--vermillion-dark);border-radius:999px;padding:13px 26px;font-size:16px;font-weight:700;box-shadow:0 6px 18px rgba(179,52,39,.3)}
.share-btn:disabled{opacity:.5}
.secondary-btn{background:var(--paper);color:var(--ink);border:1.5px solid var(--ink);border-radius:999px;padding:12px 20px;font-size:14px;font-weight:600}
.result-note{font-size:11.5px;color:#8a8474;line-height:1.7;margin-top:16px}

/* ---------- dex ---------- */
.dex-shell{max-width:880px;margin:0 auto;padding:22px 18px 60px}
.dex-head h2{font-family:var(--serif);font-size:26px;margin:8px 0 6px}
.dex-head p{color:var(--ink-soft);font-size:13.5px;margin:0 0 6px;line-height:1.6}
.dex-family{margin-top:24px}
.dex-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.dex-cell{background:#fff;border:2px solid #d9cfb2;border-radius:12px;padding:8px 8px 10px;text-align:center;transition:transform .15s,border-color .15s}
.dex-cell:hover{transform:translateY(-2px);border-color:var(--group-color)}
.dex-cell img{width:100%;height:auto;border-radius:7px}
.dex-cell strong{display:block;margin-top:8px;font-size:15px;letter-spacing:.05em}
.dex-cell small{font-size:11.5px;color:var(--ink-soft)}

/* ---------- explain modal ---------- */
.explain-modal{position:fixed;inset:0;z-index:60;background:rgba(14,12,20,.66);display:flex;align-items:flex-end;justify-content:center}
.explain-sheet{position:relative;background:var(--paper);width:min(620px,100%);max-height:88vh;overflow:auto;border-radius:20px 20px 0 0;padding:26px 24px 34px;box-shadow:0 -14px 44px rgba(0,0,0,.35)}
.explain-close{position:absolute;top:10px;right:14px;background:none;border:none;font-size:28px;line-height:1;color:var(--ink-soft)}
.explain-head{display:flex;gap:18px;align-items:center}
.explain-card-img{width:104px;height:auto;border-radius:8px;border:2px solid #14101d;flex:none}
.explain-type{font-size:13px;letter-spacing:.22em;color:var(--vermillion);font-weight:700;margin:0 0 4px}
.explain-sheet h3{font-family:var(--serif);font-size:25px;margin:0}
.explain-sub{color:var(--ink-soft);font-size:13px;margin:5px 0 0}
.explain-sheet h4{font-family:var(--serif);font-size:15px;margin:22px 0 8px;color:var(--family-dark)}
.explain-legend{font-size:14.5px;line-height:1.85;margin:0}
.explain-match{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.explain-match li{display:flex;gap:11px;align-items:baseline;font-size:14.5px;line-height:1.6}
.explain-match .letter{flex:none;width:26px;height:26px;border-radius:50%;background:var(--family);color:#fff;font-weight:800;font-size:13px;display:inline-flex;align-items:center;justify-content:center;transform:translateY(5px)}
.explain-echo{margin:22px 0 0;padding:14px 16px;background:var(--family-soft);border-left:4px solid var(--family);border-radius:0 10px 10px 0;font-size:14.5px;line-height:1.75}

/* ---------- poster modal / toast / confetti ---------- */
.poster-modal{position:fixed;inset:0;z-index:70;background:rgba(14,12,20,.72);display:none;align-items:center;justify-content:center;padding:18px}
.poster-modal.show{display:flex}
.poster-sheet{position:relative;background:var(--paper);border-radius:18px;padding:18px;width:min(430px,100%);max-height:94vh;overflow:auto;text-align:center}
.poster-sheet img{width:100%;height:auto;border-radius:10px}
.poster-close{position:absolute;top:6px;right:12px;background:none;border:none;font-size:28px;color:var(--ink-soft);z-index:2}
.poster-version{display:flex;gap:8px;justify-content:center;margin-top:14px}
.poster-version button{border:1.5px solid var(--ink);background:#fff;border-radius:999px;padding:7px 15px;font-size:13px}
.poster-version button.active{background:var(--ink);color:#fff8ec}
.poster-tip{font-size:12.5px;color:var(--ink-soft);line-height:1.6}
.poster-actions{display:flex;gap:10px;justify-content:center}
.poster-actions button{border:1.5px solid var(--ink);background:var(--paper);border-radius:999px;padding:10px 18px;font-size:14px;font-weight:600}
.toast{position:fixed;left:50%;bottom:96px;transform:translate(-50%,16px);background:var(--ink);color:#fff8ec;border-radius:999px;padding:11px 22px;font-size:14px;opacity:0;pointer-events:none;transition:.25s;z-index:90}
.toast.show{opacity:1;transform:translate(-50%,0)}
.confetti{position:fixed;inset:0;pointer-events:none;overflow:hidden;z-index:50}
.confetti i{position:absolute;top:-14px;width:9px;height:15px;border-radius:2px;animation:fall 2.3s ease-in forwards}
@keyframes fall{to{transform:translate(var(--drift,0),105vh) rotate(560deg);opacity:.85}}
.mobile-result-bar{position:fixed;left:0;right:0;bottom:0;z-index:40;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:rgba(251,247,236,.94);border-top:1px solid var(--washi-line);display:none}
.mobile-result-bar button{width:100%;background:var(--vermillion);color:#fff8ec;border:2px solid var(--vermillion-dark);border-radius:999px;padding:13px;font-size:16px;font-weight:700}
body.has-result .mobile-result-bar{display:block}

@media (max-width:800px){
  .mbti-grid,.dex-grid{grid-template-columns:repeat(2,1fr)}
  .choice-grid.three{grid-template-columns:repeat(1,1fr)}
  .result-hero{flex-direction:column}
  .result-card-img{width:min(230px,70vw);margin:0 auto}
  .result-heading{text-align:left;width:100%}
  .flip-inner{transition-duration:.7s}
  .question-card{padding:20px 16px}
  .result-panel{padding:22px 18px}
}