:root{
  --bg:#f6f8fb;--card:#fff;--text:#1d2733;--muted:#667085;--line:#dfe5ec;
  --accent:#1769aa;--accent2:#0f8a5f;--danger:#c62828;--warn:#a15c00;
  --shadow:0 10px 30px rgba(24,39,75,.08);--radius:18px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif}
body{min-height:100vh}
a{color:var(--accent)}
button,input,select,textarea{font:inherit}
button{cursor:pointer}
.container{max-width:980px;margin:0 auto;padding:24px}
.narrow{max-width:780px}
.header{display:flex;align-items:center;gap:14px;margin-bottom:18px}
.logo{width:52px;height:52px;border-radius:50%;display:grid;place-items:center;background:#fff;box-shadow:var(--shadow);font-size:30px}
.brand h1{font-size:20px;margin:0}
.brand p{margin:2px 0 0;color:var(--muted);font-size:13px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px;margin:16px 0}
.hero h2{font-size:28px;line-height:1.35;margin:0 0 10px}
.meta{display:flex;flex-wrap:wrap;gap:9px 14px;color:var(--muted);font-size:14px}
.badge{display:inline-flex;align-items:center;gap:5px;border-radius:999px;padding:7px 11px;background:#eef4fb;color:#214a6d;font-weight:700}
.badge.good{background:#e8f7f0;color:#0a6d49}
.badge.full{background:#fdecec;color:#a61b1b}
.section-title{font-size:17px;margin:0 0 10px}
.intro,.notes{white-space:pre-wrap;line-height:1.8}
.notes{background:#fff9ea;border:1px solid #f2dfab;border-radius:12px;padding:14px}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.grid-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-weight:700;font-size:14px}
.field small{color:var(--muted)}
input,select,textarea{width:100%;border:1px solid #cfd7e2;border-radius:10px;padding:11px 12px;background:#fff;color:var(--text);outline:none}
input:focus,select:focus,textarea:focus{border-color:#4c93cf;box-shadow:0 0 0 3px rgba(23,105,170,.11)}
textarea{min-height:100px;resize:vertical}
.participant{border:1px solid var(--line);border-radius:14px;padding:15px;margin:12px 0;background:#fbfcfe}
.participant h4{margin:0 0 11px}
.actions{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}
.btn{border:0;border-radius:11px;padding:11px 16px;font-weight:800;background:#e8edf4;color:#243447}
.btn.primary{background:var(--accent);color:#fff}
.btn.success{background:var(--accent2);color:#fff}
.btn.danger{background:var(--danger);color:#fff}
.btn:disabled{opacity:.45;cursor:not-allowed}
.alert{border-radius:12px;padding:12px 14px;margin:12px 0;font-weight:700;line-height:1.6}
.alert.warn{background:#fff3df;color:#855000;border:1px solid #efd19b}
.alert.error{background:#ffeded;color:#a31c1c;border:1px solid #f0b8b8}
.alert.ok{background:#eaf8f1;color:#0c6c4a;border:1px solid #b9e3d0}
.hidden{display:none!important}
.confirm-list{margin:0;padding-left:20px;line-height:1.8}
.footer{color:var(--muted);font-size:12px;text-align:center;padding:24px 0}
.demo-ribbon{position:fixed;right:12px;bottom:12px;background:#202938;color:#fff;border-radius:999px;padding:8px 12px;font-size:12px;z-index:50;box-shadow:var(--shadow)}
.topbar{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-bottom:10px}
.admin-title{font-size:26px;margin:0}
.toolbar{display:flex;gap:8px;flex-wrap:wrap}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin:14px 0}
.stat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:14px}
.stat b{font-size:24px;display:block}
.stat span{color:var(--muted);font-size:12px}
.table-wrap{overflow:auto;border:1px solid var(--line);border-radius:14px}
table{border-collapse:collapse;width:100%;min-width:760px;background:#fff}
th,td{padding:11px 12px;border-bottom:1px solid var(--line);text-align:left;font-size:14px;vertical-align:top}
th{background:#f3f6fa;position:sticky;top:0;z-index:1}
tr:last-child td{border-bottom:0}
.code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:#f1f4f8;padding:2px 6px;border-radius:5px}
.modal{position:fixed;inset:0;background:rgba(20,28,38,.55);display:grid;place-items:center;padding:20px;z-index:100}
.modal-box{width:min(900px,100%);max-height:90vh;overflow:auto;background:#fff;border-radius:18px;padding:20px;box-shadow:0 25px 70px rgba(0,0,0,.25)}
.modal-head{display:flex;align-items:center;justify-content:space-between;gap:10px}
.modal-head h3{margin:0}
.icon-btn{border:0;background:#eef2f6;border-radius:9px;padding:8px 10px}
.qr-wrap{display:flex;gap:18px;align-items:flex-start;flex-wrap:wrap}
.qr-box{background:#fff;border:1px solid var(--line);border-radius:14px;padding:12px;min-width:230px;min-height:230px;display:grid;place-items:center}
.small{font-size:12px;color:var(--muted)}
.login-card{max-width:460px;margin:70px auto}
.pill{display:inline-block;border-radius:999px;padding:4px 8px;font-size:12px;font-weight:800}
.pill.open{background:#e8f7f0;color:#0a6d49}.pill.closed{background:#f0f1f4;color:#555}.pill.full{background:#fdecec;color:#a61b1b}
@media(max-width:720px){
  .container{padding:14px}
  .hero h2{font-size:23px}
  .grid,.grid-3{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:1fr 1fr}
  .card{padding:16px}
  .topbar{align-items:flex-start;flex-direction:column}
}

/* v2: smartphone-first workshop image */
.workshop-image-wrap{
  overflow:hidden;border-radius:16px;margin:-6px -6px 16px;background:#eef2f6;
  aspect-ratio:16/9;display:none;
}
.workshop-image-wrap.show{display:block}
.workshop-image{width:100%;height:100%;object-fit:cover;display:block}
.image-editor{border:1px dashed #b9c7d6;border-radius:14px;padding:14px;background:#f8fafc}
.image-preview{
  width:100%;max-width:420px;aspect-ratio:16/9;object-fit:cover;border-radius:12px;
  border:1px solid var(--line);background:#eef2f6;margin-top:10px;display:none
}
.image-preview.show{display:block}
.mobile-section{scroll-margin-top:12px}
.capacity-strip{
  display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:14px
}
.capacity-box{
  border:1px solid var(--line);border-radius:12px;padding:10px;text-align:center;background:#fbfcfe
}
.capacity-box strong{display:block;font-size:19px}
.capacity-box span{display:block;color:var(--muted);font-size:11px;margin-top:2px}
.capacity-box.remaining{background:#eaf8f1;border-color:#b9e3d0}
.capacity-box.remaining strong{color:#0c7a52}
.capacity-box.full{background:#ffeded;border-color:#f0b8b8}
.capacity-box.full strong{color:#a31c1c}
.grade-notice{margin-top:12px;padding:11px 12px;border-radius:12px;background:#edf7ff;color:#164e7a;font-weight:700}
.mobile-submit-bar{display:none}
@media(max-width:720px){
  body{background:#f4f7fa}
  .container.narrow{padding:0 0 92px}
  .container.narrow .header{padding:14px 16px 6px;margin:0;background:#fff}
  .container.narrow .card{border-radius:0;border-left:0;border-right:0;margin:10px 0;box-shadow:0 4px 14px rgba(24,39,75,.05)}
  .container.narrow .hero{margin-top:0}
  .container.narrow .hero h2{font-size:25px}
  .workshop-image-wrap{margin:-16px -16px 16px;border-radius:0;aspect-ratio:16/10}
  .capacity-strip{gap:6px}
  .capacity-box{padding:9px 5px}
  input,select,textarea{font-size:16px;min-height:46px}
  .participant{padding:13px}
  .btn{min-height:46px}
  .actions .btn{flex:1}
}

.btn.warning{background:#f59e0b;color:#fff}


/* v4 実用版 */
.hero-badges{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.fee-badge{background:#fff4dd;color:#7b4b00}
.session-list{display:grid;gap:12px;margin-top:14px}
.session-option{position:relative;border:2px solid var(--line);border-radius:15px;padding:14px;background:#fff;transition:.15s}
.session-option.available{cursor:pointer}
.session-option.available:hover{border-color:#8db9df;background:#f8fbff}
.session-option.selected{border-color:var(--accent);box-shadow:0 0 0 3px rgba(23,105,170,.10);background:#f7fbff}
.session-option.unavailable{opacity:.62;background:#f5f6f8}
.session-option input{position:absolute;right:14px;top:14px;width:auto}
.session-main{font-weight:800;font-size:17px;padding-right:30px}
.session-sub{display:flex;gap:8px 14px;flex-wrap:wrap;color:var(--muted);margin-top:7px;font-size:14px}
.session-capacity{display:flex;gap:7px;flex-wrap:wrap;margin-top:10px}
.mini-badge{border-radius:999px;background:#eef3f8;padding:5px 9px;font-size:12px;font-weight:800}
.mini-badge.good{background:#e8f7f0;color:#0a6d49}.mini-badge.full{background:#fdecec;color:#a61b1b}.mini-badge.closed{background:#eceff3;color:#5d6570}
.consent-box{display:flex;gap:11px;align-items:flex-start;margin-top:18px;padding:14px;border:1px solid #bfd4e6;border-radius:13px;background:#f5faff;line-height:1.75}
.consent-box input{width:auto;min-width:20px;height:20px;margin-top:4px}
.btn:disabled{filter:grayscale(.5);background:#cbd2db!important;color:#6b7280!important;opacity:1}
.workshop-session-admin{margin-top:16px;border-top:1px solid var(--line);padding-top:15px}
.session-admin-row{border:1px solid var(--line);border-radius:13px;padding:12px;margin-top:9px;background:#fbfcfe}
.session-admin-head{display:flex;justify-content:space-between;gap:12px;align-items:flex-start}
.session-admin-actions{display:flex;gap:7px;flex-wrap:wrap;margin-top:10px}
.session-count{font-size:13px;color:var(--muted)}
@media(max-width:720px){.session-main{font-size:16px}.session-sub{display:block}.session-sub span{display:block;margin-top:3px}.consent-box{font-size:14px}}

/* v5.9 会員先行予約 */
.early-booking-box{border:2px solid #e8b949;background:#fff9e8;border-radius:14px;padding:16px}
.early-booking-box .section-title{color:#7a5200}
.early-status{display:inline-flex;align-items:center;border-radius:999px;padding:5px 9px;font-size:12px;font-weight:800;background:#fff1c7;color:#805700;margin-left:6px}
.early-status.general{background:#e8f7f0;color:#0a6d49}
#editEarlyToggle.early-on{background:#b7791f;color:#fff}
#editEarlyToggle.early-off{background:#e8edf4;color:#243447}

/* password input common */
.password-wrap{position:relative}
.password-wrap input{padding-right:48px}
.password-eye{position:absolute;right:8px;top:50%;transform:translateY(-50%);width:38px;height:38px;border:0;border-radius:9px;background:transparent;display:grid;place-items:center;cursor:pointer;font-size:20px;line-height:1;color:#4b5563}
.password-eye:hover{background:#eef2f6}
.password-eye:focus-visible{outline:2px solid #1769aa;outline-offset:2px}


/* v5.10: participant list without horizontal scrolling */
#reservationsModal .modal-box{
  width:min(1120px,calc(100vw - 32px));
}
#reservationsBody{
  overflow:visible;
}
.reservation-session-group{
  border:1px solid var(--line);
  border-radius:16px;
  background:#f8fafc;
  padding:14px;
  margin:16px 0;
}
.reservation-session-title{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:10px;
}
.reservation-session-title h4{
  margin:0 0 3px;
  font-size:17px;
}
.reservation-card-list{
  display:grid;
  gap:10px;
}
.reservation-card{
  background:#fff;
  border:1px solid #d9e1ea;
  border-radius:13px;
  padding:12px 14px;
}
.reservation-card-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  border-bottom:1px solid #e6ebf1;
  padding-bottom:8px;
  margin-bottom:9px;
}
.reservation-card-heading,.reservation-card-actions{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
}
.reservation-no{
  font-weight:900;
  color:#24425f;
}
.btn.compact{
  min-height:0;
  padding:7px 10px;
  border-radius:9px;
  font-size:13px;
}
.reservation-card-body{
  display:grid;
  grid-template-columns:minmax(0,1.25fr) minmax(260px,.75fr);
  gap:14px;
}
.reservation-participants{
  display:grid;
  gap:7px;
}
.participant-two-line{
  border-radius:10px;
  background:#f6f9fc;
  padding:8px 10px;
}
.participant-line-main{
  display:flex;
  align-items:baseline;
  flex-wrap:wrap;
  gap:7px;
  line-height:1.45;
}
.participant-index{
  display:inline-grid;
  place-items:center;
  min-width:23px;
  height:23px;
  border-radius:50%;
  background:#e2edf7;
  font-size:12px;
  font-weight:900;
}
.participant-kana{
  color:#52667a;
  font-size:13px;
}
.participant-line-sub{
  display:flex;
  flex-wrap:wrap;
  gap:10px 20px;
  margin-left:30px;
  margin-top:3px;
  font-size:13px;
}
.reservation-booking-meta{
  display:flex;
  flex-direction:column;
  justify-content:center;
  gap:5px;
  border-left:3px solid #e1e8ef;
  padding-left:12px;
  overflow-wrap:anywhere;
}
.roster-block{
  margin-top:14px;
  background:#fff;
  border:2px solid #cdddea;
  border-radius:13px;
  padding:12px;
}
.roster-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-bottom:10px;
}
.roster-actions{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
}
.roster-table-wrap{
  width:100%;
  overflow:visible;
}
.roster-table{
  width:100%;
  min-width:0;
  table-layout:fixed;
  border-collapse:collapse;
}
.roster-table th,.roster-table td{
  padding:8px 9px;
  font-size:13px;
  overflow-wrap:anywhere;
}
.roster-table th:nth-child(1){width:27%}
.roster-table th:nth-child(2){width:27%}
.roster-table th:nth-child(3){width:31%}
.roster-table th:nth-child(4){width:15%}

@media(max-width:760px){
  #reservationsModal .modal-box{
    width:calc(100vw - 16px);
    padding:12px;
  }
  .reservation-card-head,.roster-head{
    align-items:flex-start;
    flex-direction:column;
  }
  .reservation-card-actions,.roster-actions{
    width:100%;
  }
  .reservation-card-actions .btn,.roster-actions .btn{
    flex:1;
  }
  .reservation-card-body{
    grid-template-columns:1fr;
  }
  .reservation-booking-meta{
    border-left:0;
    border-top:2px solid #e1e8ef;
    padding-left:0;
    padding-top:9px;
  }
  .participant-line-sub{
    margin-left:0;
  }
  .roster-table th,.roster-table td{
    padding:7px 5px;
    font-size:12px;
  }
}


/* v5.11: reservation date change */
.move-participants{
  display:grid;
  gap:8px;
  margin-top:8px;
}
.move-participant-item{
  display:flex;
  gap:10px;
  align-items:flex-start;
  padding:10px 12px;
  border:1px solid #d8e1ea;
  border-radius:11px;
  background:#f8fbfe;
  cursor:pointer;
}
.move-participant-item input{
  width:auto;
  margin-top:4px;
  transform:scale(1.15);
}
.move-preview{
  padding:12px;
  border:1px solid #d8e1ea;
  border-radius:12px;
  background:#fff;
}
.move-preview-grid{
  display:grid;
  grid-template-columns:1fr 1.2fr;
  gap:10px;
}
.move-preview-grid>div{
  padding:10px;
  background:#f6f9fc;
  border-radius:10px;
}
.move-preview-grid span{
  display:block;
  font-size:12px;
  color:#607286;
  margin-bottom:4px;
}
@media(max-width:700px){
  .move-preview-grid{grid-template-columns:1fr;}
}