:root{
  --navy:#16325c; --blue:#1f5fbf; --sky:#e8f1fc; --ink:#1d2433;
  --muted:#6b7385; --line:#dbe3ef; --bg:#f5f8fc; --ok:#178a4c;
}
*{box-sizing:border-box}
body{margin:0;font-family:'Sarabun',system-ui,sans-serif;color:var(--ink);background:var(--bg);font-size:17px;line-height:1.6}
a{color:var(--blue)}
.topbar{background:var(--navy);padding:14px 16px}
.brand{color:#fff;text-decoration:none;font-weight:700;font-size:20px}
.wrap{max-width:960px;margin:0 auto;padding:24px 16px 48px}
h1{color:var(--navy);margin:0 0 12px;font-size:28px}
.muted{color:var(--muted)} .small{font-size:14px}
.price{color:var(--blue);font-weight:700;margin:4px 0}
.price.big{font-size:28px}
.back{display:inline-block;margin-bottom:16px;text-decoration:none}

.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:20px}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;text-decoration:none;color:inherit;transition:transform .15s,box-shadow .15s}
.card:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(22,50,92,.12)}
.card img{width:100%;aspect-ratio:3/4;object-fit:cover;display:block;background:var(--sky)}
.card-body{padding:12px 14px}
.card h2{font-size:18px;margin:0;color:var(--navy)}
.card p{margin:2px 0}

.detail{display:grid;grid-template-columns:260px 1fr;gap:32px;background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px}
.cover{width:100%;border-radius:8px;box-shadow:0 6px 18px rgba(0,0,0,.15)}
@media (max-width:640px){.detail{grid-template-columns:1fr}.cover{max-width:220px}}

.btn{display:inline-block;background:var(--blue);color:#fff;border:0;border-radius:10px;padding:12px 22px;font:inherit;font-weight:600;text-decoration:none;cursor:pointer}
.btn:hover{background:var(--navy)}
.btn.ghost{background:var(--sky);color:var(--navy)}

.panel{max-width:460px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:14px;padding:28px}
.center{text-align:center}
.summary{display:flex;gap:14px;align-items:center;background:var(--sky);border-radius:10px;padding:12px;margin-bottom:18px}
.summary img{width:56px;border-radius:4px}
label{display:block;font-weight:600;margin-bottom:6px}
input[type=email]{width:100%;padding:12px;border:1px solid var(--line);border-radius:10px;font:inherit;margin-bottom:16px}
form .btn{width:100%}
.alert{background:#fdecec;color:#a32020;padding:10px 12px;border-radius:8px}

.qr{width:260px;max-width:100%;border:8px solid var(--sky);border-radius:12px;margin:12px auto;display:block}
.waiting{margin-top:16px;color:var(--navy);font-weight:600}
.dot{display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--blue);margin-right:6px;animation:pulse 1.2s infinite}
@keyframes pulse{0%,100%{opacity:.25}50%{opacity:1}}

.check{width:72px;height:72px;line-height:72px;margin:0 auto 12px;border-radius:50%;background:var(--ok);color:#fff;font-size:40px}
.receipt{width:100%;border-collapse:collapse;margin:16px 0;text-align:left;font-size:15px}
.receipt th{background:var(--navy);color:#fff;font-weight:600;width:34%}
.receipt th,.receipt td{padding:8px 10px;border-bottom:1px solid var(--line)}
.receipt tr:nth-child(even) td{background:var(--sky)}
.mono{font-family:ui-monospace,monospace;font-size:13px;word-break:break-all}
.foot{text-align:center;color:var(--muted);font-size:14px;padding:20px}
.howto{background:var(--sky);border-radius:10px;padding:12px 14px;margin:14px 0 6px;text-align:left;font-size:15px}
.admin{max-width:none}
.admin table{width:100%;border-collapse:collapse;font-size:14px;margin:8px 0 20px}
.admin th{background:var(--navy);color:#fff;text-align:left;padding:8px}
.admin td{padding:8px;border-bottom:1px solid var(--line);vertical-align:top}
.admin tr:nth-child(even) td{background:var(--sky)}
.admin section{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;margin-bottom:20px}
.admin h2{color:var(--navy);margin:0 0 10px;font-size:20px}
.admin .row{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.admin input,.admin select{padding:9px;border:1px solid var(--line);border-radius:8px;font:inherit}
.btn.sm{padding:6px 12px;font-size:14px}
.ok{color:var(--ok);font-weight:600}.bad{color:#a32020;font-weight:600}
.flash{background:var(--sky);border-left:4px solid var(--blue);padding:10px 14px;border-radius:6px;margin-bottom:16px}
.flash.err{background:#fdecec;border-color:#a32020}
.card{position:relative}
.badge{position:absolute;top:10px;left:10px;background:#d6336c;color:#fff;font-size:13px;font-weight:700;padding:3px 10px;border-radius:20px;z-index:1}
.was{color:var(--muted);text-decoration:line-through;font-weight:400;font-size:.85em}
.off{background:#fde2ec;color:#c2255c;font-size:.7em;padding:2px 7px;border-radius:12px;vertical-align:middle}
.sale-ends{color:#c2255c;font-size:14px;margin:0 0 10px}
.bookform{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px 16px}
.bookform label{font-weight:600;font-size:14px;margin-bottom:2px}
.bookform input,.bookform textarea,.bookform select{width:100%;padding:9px;border:1px solid var(--line);border-radius:8px;font:inherit}
.bookform .full{grid-column:1/-1}
.bookform .hint{color:var(--muted);font-size:13px;font-weight:400}
.salebox{grid-column:1/-1;background:#fff5f8;border:1px dashed #f3a6c0;border-radius:10px;padding:12px 14px;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:10px 16px}
.thumb{width:48px;height:64px;object-fit:cover;border-radius:4px;background:var(--sky)}
.tag{display:inline-block;font-size:12px;padding:1px 8px;border-radius:10px;background:var(--sky);color:var(--navy)}