:root{
  --blue:#4169B5;
  --blue-dk:#2f4f8f;
  --blue-lt:#eef2ff;
  --purple:#6b53c9;
  --orange:#e58a3c;
  --navy:#16213e;
  --text:#1a2340;
  --sub:#5a6270;
  --border:#dde3f0;
  --bg-pale:#f3f6fd;
  --white:#fff;
  --radius:14px;
  --shadow:0 10px 40px rgba(30,50,100,.10);
  --font-jp:'Noto Sans JP',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  --font-en:'Poppins',sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%}
body.csac-body{
  font-family:var(--font-jp);
  color:var(--text);
  line-height:1.8;
  background:var(--bg-pale);
  -webkit-font-smoothing:antialiased;
  letter-spacing:.01em;
  display:flex;
  flex-direction:column;
  min-height:100vh;
}
.csac-body img{max-width:100%;display:block}
.csac-body button{font-family:inherit;cursor:pointer}
.csac-body a{color:var(--blue)}

/* ---------- Header / Footer ---------- */
.dx-header{
  padding:18px 22px;
  background:transparent;
  position:relative;z-index:20;
}
.dx-brand{
  font-weight:700;font-size:16px;color:var(--navy);letter-spacing:.02em;
}
.dx-footer{
  padding:22px;text-align:center;
  font-family:var(--font-en);font-size:12px;color:var(--sub);
  letter-spacing:.04em;
}
.dx-footer[hidden]{display:none}

/* ---------- Stage container ---------- */
.dx-stage{
  flex:1 0 auto;
  display:flex;flex-direction:column;
  position:relative;
}
.dx-bg{
  position:absolute;inset:0;z-index:0;overflow:hidden;pointer-events:none;
}
.dx-bg img{
  width:100%;height:100%;object-fit:cover;opacity:.08;
  filter:saturate(.9);
}
.dx-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(243,246,253,.55),rgba(243,246,253,.9));
}
.dx-wrap{
  position:relative;z-index:1;
  width:100%;max-width:600px;margin:0 auto;
  padding:34px 20px 56px;
  flex:1 0 auto;
  display:flex;flex-direction:column;
}
.screen{display:none;animation:fade .35s ease}
.screen.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ---------- Start screen ---------- */
#screen-start{text-align:center}
.start-badge{
  display:inline-block;font-family:var(--font-en);font-size:11px;font-weight:600;
  letter-spacing:.22em;color:var(--blue);
  border:1px solid var(--blue);border-radius:999px;padding:6px 16px;margin-bottom:22px;
}
.start-h1{
  font-size:26px;font-weight:900;line-height:1.5;color:var(--navy);
  letter-spacing:.01em;margin-bottom:18px;
}
.start-h1 .accent{color:var(--blue)}
.start-lead{font-size:15px;color:var(--sub);margin-bottom:8px}
.start-note{font-size:13px;color:var(--sub);margin-bottom:26px}
.start-meta{
  display:flex;gap:10px;flex-wrap:wrap;margin-bottom:30px;
}
.start-meta li{
  list-style:none;background:var(--white);border:1px solid var(--border);
  border-radius:10px;padding:12px 8px;text-align:center;flex:1;min-width:92px;
  box-shadow:0 3px 12px rgba(30,50,100,.05);
}
.start-meta b{display:block;font-size:17px;color:var(--navy);font-weight:700}
.start-meta span{font-size:11px;color:var(--sub)}
.start-hint{font-size:13px;color:var(--sub);text-align:center;margin-top:14px}

/* ---------- Primary button ---------- */
.btn-primary{
  display:block;width:100%;border:none;
  background:linear-gradient(120deg,var(--blue),var(--purple));
  color:#fff;font-size:16px;font-weight:700;letter-spacing:.03em;
  padding:17px;border-radius:var(--radius);
  box-shadow:0 8px 22px rgba(65,105,181,.28);
  transition:transform .15s ease,box-shadow .15s ease,opacity .15s;
}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 12px 28px rgba(65,105,181,.34)}
.btn-primary:active{transform:translateY(0)}
.btn-primary:disabled{
  opacity:.45;cursor:not-allowed;transform:none;box-shadow:none;
  background:#9aa4bd;
}

/* ---------- Question screen ---------- */
.q-topbar{margin-bottom:20px}
.q-count{
  font-family:var(--font-en);font-size:13px;font-weight:600;color:var(--blue-dk);
  letter-spacing:.06em;margin-bottom:8px;
}
.q-count b{font-size:17px;color:var(--blue)}
.q-bar{height:6px;border-radius:99px;background:#e3e8f5;overflow:hidden}
.q-bar span{
  display:block;height:100%;border-radius:99px;
  background:linear-gradient(90deg,var(--blue),var(--purple));
  transition:width .4s cubic-bezier(.4,0,.2,1);
}
.q-card{
  background:var(--white);border:1px solid var(--border);border-radius:18px;
  padding:26px 22px 24px;box-shadow:var(--shadow);
}
@keyframes qin{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:none}}
.q-card.anim{animation:qin .18s ease}
.q-text{font-size:19px;font-weight:700;line-height:1.6;color:var(--navy);margin-bottom:8px}
.q-note{font-size:13px;color:var(--sub);margin-bottom:20px}
.q-options{display:flex;flex-direction:column;gap:11px}
.opt{
  display:flex;align-items:center;gap:12px;text-align:left;
  width:100%;min-height:56px;padding:13px 16px;
  background:#fbfcff;border:1.6px solid var(--border);border-radius:12px;
  font-size:15px;line-height:1.5;color:var(--text);font-weight:500;
  transition:border-color .15s,background .15s,transform .1s;
}
.opt:hover{border-color:var(--blue);background:#f4f7ff}
.opt .dot{
  flex:0 0 20px;width:20px;height:20px;border-radius:50%;
  border:2px solid #b9c3dd;transition:.15s;position:relative;
}
.opt.selected{
  border-color:var(--blue);
  background:linear-gradient(120deg,rgba(65,105,181,.10),rgba(107,83,201,.10));
}
.opt.selected .dot{border-color:var(--blue);background:var(--blue)}
.opt.selected .dot::after{
  content:"";position:absolute;inset:0;margin:auto;width:7px;height:7px;
  border-radius:50%;background:#fff;
}
.q-back{
  margin-top:20px;background:none;border:none;color:var(--sub);
  font-size:14px;font-weight:500;padding:6px 4px;display:inline-flex;align-items:center;gap:6px;
}
.q-back:hover{color:var(--blue)}

/* ---------- Loading ---------- */
.loading-box{text-align:center;padding:80px 0}
.spinner{
  width:44px;height:44px;margin:0 auto 20px;border-radius:50%;
  border:4px solid #dbe3f6;border-top-color:var(--blue);animation:spin .8s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}
.loading-box p{color:var(--sub);font-size:15px}
.load-error{text-align:center;padding:50px 0}
.load-error p{color:var(--sub);font-size:15px;margin-bottom:20px}
.load-error[hidden]{display:none}

/* ---------- Result ---------- */
.r-head{
  background:var(--white);border:1px solid var(--border);border-radius:18px;
  padding:30px 24px;text-align:center;box-shadow:var(--shadow);margin-bottom:22px;
}
.r-label{font-size:14px;color:var(--sub);letter-spacing:.08em;margin-bottom:6px}
.r-grade{
  font-family:var(--font-en);font-size:74px;font-weight:700;line-height:1;
  letter-spacing:.02em;
}
.grade-A .r-grade{color:var(--blue)}
.grade-B .r-grade{color:var(--purple)}
.grade-C .r-grade{color:var(--orange)}
.r-stage{
  display:inline-block;margin-top:12px;font-size:15px;font-weight:700;color:var(--navy);
  padding:5px 16px;border-radius:999px;background:var(--blue-lt);
}
.grade-B .r-stage{background:#f0ecfb}
.grade-C .r-stage{background:#fdf0e4}
.r-subnote{font-size:14px;color:var(--sub);margin-top:12px}
.r-scale{font-size:11.5px;color:#9098aa;margin-top:10px}
.r-comment{
  background:var(--white);border:1px solid var(--border);border-radius:16px;
  padding:24px 22px;font-size:15px;line-height:2;color:var(--text);
  margin-bottom:24px;box-shadow:0 4px 16px rgba(30,50,100,.05);
}

/* ---------- Report CTA / Form ---------- */
.cta{
  background:linear-gradient(160deg,#fff, #f6f9ff);
  border:1px solid var(--border);border-radius:16px;padding:26px 22px;
  box-shadow:var(--shadow);
}
.cta-h{font-size:18px;font-weight:900;color:var(--navy);line-height:1.5;margin-bottom:12px}
.cta-p{font-size:14px;color:var(--sub);margin-bottom:16px}
.cta-list{list-style:none;margin-bottom:18px}
.cta-list li{
  font-size:14px;color:var(--text);padding:7px 0 7px 26px;position:relative;
  border-bottom:1px dashed #e6ebf6;
}
.cta-list li:last-child{border-bottom:none}
.cta-list li::before{
  content:"";position:absolute;left:4px;top:15px;width:9px;height:9px;border-radius:50%;
  background:linear-gradient(120deg,var(--blue),var(--purple));
}
.cta-timing{font-size:12.5px;color:var(--sub);background:var(--blue-lt);
  border-radius:10px;padding:12px 14px;margin-bottom:20px;line-height:1.8}

.form[hidden]{display:none}
.field{margin-bottom:18px}
.field label{display:block;font-size:13.5px;font-weight:700;color:var(--navy);margin-bottom:7px}
.req{color:#d0433f;font-size:12px;margin-left:5px;font-weight:700}
.opt-tag{color:var(--sub);font-size:11px;margin-left:6px;font-weight:500}
.field input[type=text],.field input[type=email]{
  width:100%;padding:13px 14px;font-size:15px;font-family:inherit;color:var(--text);
  border:1.6px solid var(--border);border-radius:11px;background:#fbfcff;
  transition:border-color .15s;
}
.field input:focus{outline:none;border-color:var(--blue);background:#fff}
.field.invalid input{border-color:#e0a0a0;background:#fff7f7}
.field-msg{font-size:12px;color:#d0433f;margin-top:6px;display:none}
.field.invalid .field-msg{display:block}
.mail-suggest{
  font-size:12.5px;margin-top:7px;color:var(--blue-dk);display:none;
}
.mail-suggest.show{display:block}
.mail-suggest b{cursor:pointer;text-decoration:underline;color:var(--blue)}
.send-to{
  font-size:12.5px;color:var(--sub);background:#f5f7fd;border-radius:9px;
  padding:10px 13px;margin-bottom:18px;word-break:break-all;
}
.send-to b{color:var(--navy)}
.check{
  display:flex;gap:11px;align-items:flex-start;padding:12px 0;font-size:13.5px;
  color:var(--text);line-height:1.6;
}
.check input{margin-top:3px;width:19px;height:19px;flex:0 0 19px;accent-color:var(--blue)}
.check.optional{border-top:1px dashed #e6ebf6;border-bottom:1px dashed #e6ebf6;margin-bottom:4px}
.mail-desc{font-size:12px;color:var(--sub);margin:2px 0 14px;padding-left:30px;line-height:1.7}
.hp-field{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.form-hint{font-size:12px;color:var(--sub);text-align:center;margin-top:12px;min-height:16px}
.form-hint.error{color:#d0433f}

.done-box{
  text-align:center;padding:30px 20px;
  background:var(--white);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);
}
.done-icon{
  width:56px;height:56px;margin:0 auto 16px;border-radius:50%;
  background:linear-gradient(120deg,var(--blue),var(--purple));
  display:flex;align-items:center;justify-content:center;
}
.done-icon svg{width:28px;height:28px;stroke:#fff;stroke-width:3;fill:none}
.done-box h3{font-size:18px;color:var(--navy);margin-bottom:12px}
.done-box p{font-size:14px;color:var(--sub);line-height:1.9}

/* reCAPTCHA バッジは表示するがフォーム下部に控えめに */
.grecaptcha-badge{visibility:hidden}
.csac-recaptcha-note{font-size:10.5px;color:#9098aa;margin-top:10px;line-height:1.6;text-align:center}
.csac-recaptcha-note a{color:#7a8296}

@media(max-width:420px){
  .start-h1{font-size:23px}
  .r-grade{font-size:64px}
  .q-text{font-size:18px}
}