:root{
  --navy:#0d1b2e; --navy-2:#132842; --cyan:#00bceb; --cyan-d:#0098c0;
  --ink:#1c2b3a; --muted:#5a6b7b; --line:#d7e1ea; --bg:#eef2f6; --white:#fff;
  --radius:14px; --font:'Segoe UI',system-ui,-apple-system,'Helvetica Neue',Arial,'Noto Sans Thai',sans-serif;
}
*{box-sizing:border-box}
body{margin:0;font-family:var(--font);background:var(--bg);color:var(--ink);line-height:1.6}
a{color:var(--cyan-d)}
img{max-width:100%}
.wrap{max-width:820px;margin:0 auto;padding:0 18px}
.rainbow{height:6px;background:linear-gradient(90deg,#00bceb,#1e90ff,#4b6ce0,#8a5cd6,#c04bc0,#e0447e,#f2564b,#f7861f)}
.card{background:var(--white);border-radius:var(--radius);box-shadow:0 10px 30px rgba(13,27,46,.08);overflow:hidden;margin:22px 0}
.card-body{padding:26px 28px}

/* header banner */
.banner{background:var(--navy);color:#fff;padding:30px 28px}
.banner .brand{font-size:15px;letter-spacing:1px;opacity:.9}
.banner .brand b{font-weight:800}
.banner h1{font-size:28px;margin:8px 0 0;line-height:1.15}
.banner .city{color:var(--cyan)}
.banner-img{display:block;width:100%}

/* detail row */
.details{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;padding:22px 28px;border-bottom:1px solid var(--line)}
.details .k{color:var(--cyan-d);font-size:12px;font-weight:700;letter-spacing:1px;text-transform:uppercase}
.details .v{font-weight:700;margin-top:4px}
@media(max-width:640px){.details{grid-template-columns:1fr}}

/* agenda */
table.agenda{width:100%;border-collapse:collapse;font-size:14px}
table.agenda th{background:var(--navy);color:#fff;text-align:left;padding:11px 12px;font-size:13px}
table.agenda td{border:1px solid var(--line);padding:10px 12px;vertical-align:top}
table.agenda tr.section td{background:var(--cyan);color:#fff;font-weight:700;border-color:var(--cyan)}
table.agenda td.session{font-weight:700}

/* form */
label.field{display:block;margin:16px 0}
label.field .lab{font-weight:700;font-size:14px;margin-bottom:6px;display:block}
label.field .req{color:#e0447e}
input[type=text],input[type=email],input[type=tel],select,textarea{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fbfdff}
input:focus,select:focus,textarea:focus{outline:2px solid var(--cyan);border-color:var(--cyan)}
.check{display:flex;gap:10px;align-items:flex-start;margin:14px 0;font-size:14px}
.check input{margin-top:4px}
.radio-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:8px}
/* selectable option boxes (radio & checkbox) — match the input styling */
.opt{display:flex;align-items:center;gap:10px;flex:1;min-width:180px;
  padding:13px 16px;border:1px solid var(--line);border-radius:10px;background:#fbfdff;
  cursor:pointer;font-weight:600;transition:border-color .15s,background .15s,box-shadow .15s}
.opt:hover{border-color:var(--cyan)}
.opt input{width:18px;height:18px;margin:0;accent-color:var(--cyan);flex:none}
.opt:has(input:checked){border-color:var(--cyan);background:#eafaff;box-shadow:inset 0 0 0 1px var(--cyan)}
.opt.check-opt{flex:none;width:100%;margin-top:8px}
.btn{display:inline-block;background:var(--cyan);color:#fff;border:0;border-radius:26px;
  padding:13px 32px;font-size:15px;font-weight:700;cursor:pointer;text-decoration:none}
.btn:hover{background:var(--cyan-d)}
.btn.block{display:block;width:100%;text-align:center}
.btn.ghost{background:transparent;color:var(--navy);border:1px solid var(--line)}
.muted{color:var(--muted)}
.small{font-size:13px}
.errors{background:#fff3f5;border:1px solid #f3c6cf;color:#b02a45;border-radius:10px;padding:12px 16px;margin:14px 0}
.errors ul{margin:6px 0 0 18px}
/* inline field-level validation */
.err{display:block;color:#c0392b;font-size:13px;margin-top:6px;font-weight:600}
input.invalid,select.invalid,textarea.invalid{border-color:#e0447e;background:#fff6f8}
input.invalid:focus,select.invalid:focus,textarea.invalid:focus{outline-color:#e0447e}
/* consent blocks: keep both identical */
.consent{margin:18px 0}
.consent-note{margin:6px 0 0}
.field.has-error .opt{border-color:#e0447e;background:#fff6f8}
/* submit loading overlay */
#loadingOverlay{position:fixed;inset:0;background:rgba(13,27,46,.55);display:none;align-items:center;justify-content:center;z-index:9999}
#loadingOverlay.show{display:flex}
#loadingOverlay .lo-box{background:#fff;border-radius:14px;padding:28px 32px;text-align:center;max-width:340px;box-shadow:0 20px 60px rgba(0,0,0,.35)}
#loadingOverlay .lo-spin{width:42px;height:42px;border:4px solid var(--line);border-top-color:var(--cyan);border-radius:50%;margin:0 auto 16px;animation:lo-spin .8s linear infinite}
#loadingOverlay .lo-msg{font-weight:700;color:var(--ink);line-height:1.5}
#loadingOverlay .lo-sub{font-size:13px;color:var(--muted);margin-top:6px}
@keyframes lo-spin{to{transform:rotate(360deg)}}
.btn[disabled]{opacity:.65;cursor:progress}
.notice{background:#eafaff;border:1px solid #b7ecfb;border-radius:10px;padding:14px 16px;margin:14px 0}
.qr-box{text-align:center;padding:10px}
.qr-box img{width:240px;height:240px;border:1px solid var(--line);padding:8px;background:#fff;border-radius:12px}
.badge{display:inline-block;padding:4px 12px;border-radius:20px;font-size:12px;font-weight:700}
.badge.ok{background:#e2f7ea;color:#1a7f42}
.badge.warn{background:#fff2e0;color:#b56a00}
.footer{background:var(--navy);color:#c7d3de;padding:18px 28px;font-size:13px}
.footer b{color:#fff}
.center{text-align:center}
h2{margin:0 0 4px}
.event-list a{display:block;background:#fff;border-radius:12px;padding:18px 20px;margin:12px 0;
  text-decoration:none;color:var(--ink);box-shadow:0 6px 18px rgba(13,27,46,.07)}
.event-list a:hover{box-shadow:0 10px 26px rgba(13,27,46,.12)}
.event-list .meta{color:var(--muted);font-size:14px;margin-top:2px}

/* Mobile: full-width edge-to-edge card */
@media(max-width:640px){
  .wrap{padding:0}
  .card{margin:0 0 14px;border-radius:0;box-shadow:none}
  .banner{padding:22px 18px}
  .banner h1{font-size:23px}
  .details{padding:18px}
  .card-body{padding:20px 18px}
  .footer{padding:16px 18px}
  .event-list{padding:0 14px}
  table.agenda{font-size:13px}
  table.agenda th,table.agenda td{padding:8px 8px}
}