:root{
  --bg:#0f172a; --panel:#ffffff; --ink:#0f172a; --muted:#64748b;
  --line:#e2e8f0; --brand:#1e40af; --brand2:#2563eb; --accent:#0ea5e9;
  --ok:#16a34a; --err:#dc2626; --soft:#f1f5f9; --radius:14px;
}
*{box-sizing:border-box}
body{
  margin:0;color:var(--ink);background:#f5f7fb;
  font-family:"Segoe UI",Tahoma,"Sarabun","Noto Sans Thai",system-ui,sans-serif;
  line-height:1.55;
}
.wrap{max-width:880px;margin:0 auto;padding:0 18px}

/* header */
.site-header{
  background:linear-gradient(120deg,var(--brand),var(--brand2) 60%,var(--accent));
  color:#fff;box-shadow:0 2px 14px rgba(15,23,42,.18)
}
.header-inner{display:flex;align-items:center;min-height:78px}
.brand{display:flex;align-items:center;gap:14px}
.brand-badge{
  width:46px;height:46px;border-radius:12px;background:rgba(255,255,255,.16);
  display:grid;place-items:center;font-weight:800;font-size:18px;letter-spacing:1px;
  border:1px solid rgba(255,255,255,.35)
}
.brand-title{font-weight:700;font-size:1.15rem}
.brand-sub{font-size:.82rem;opacity:.9}

/* cards / form */
main.wrap{padding-top:26px;padding-bottom:48px}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:0 6px 24px rgba(15,23,42,.06)
}
.intro h1{margin:.1em 0 .15em;font-size:1.4rem}
.intro .lead{margin:0;color:var(--brand);font-weight:600}
.intro{border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:8px}

.sec{padding:18px 0;border-bottom:1px dashed var(--line)}
.sec:last-of-type{border-bottom:none}
.sec h2{display:flex;align-items:center;gap:10px;font-size:1.08rem;margin:.2em 0 1em}
.num{
  width:26px;height:26px;border-radius:50%;background:var(--brand);color:#fff;
  display:grid;place-items:center;font-size:.85rem;font-weight:700;flex:0 0 auto
}
.field{margin:0 0 14px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}
@media(max-width:620px){.grid2{grid-template-columns:1fr}}
label{display:block;font-weight:600;font-size:.92rem;margin-bottom:6px;color:#1f2937}
label.req::after{content:" *";color:var(--err)}
.hint{color:var(--muted);font-weight:400;font-size:.85rem}
input[type=text],input[type=email],input[type=url],input[type=tel],select,textarea{
  width:100%;padding:10px 12px;border:1px solid #cbd5e1;border-radius:9px;
  font:inherit;color:var(--ink);background:#fff;transition:border .15s,box-shadow .15s
}
input:focus,select:focus,textarea:focus{
  outline:none;border-color:var(--brand2);box-shadow:0 0 0 3px rgba(37,99,235,.15)
}
textarea{resize:vertical}
.mt6{margin-top:8px}.mt16{margin-top:16px}

.checks,.radios{display:flex;flex-wrap:wrap;gap:8px 18px}
.chk,.rdo{display:inline-flex;align-items:center;gap:7px;font-weight:500;
  background:var(--soft);border:1px solid var(--line);padding:7px 12px;border-radius:9px;cursor:pointer}
.chk input,.rdo input{accent-color:var(--brand2);width:16px;height:16px}

.consent{display:flex;gap:10px;align-items:flex-start;background:var(--soft);
  border:1px solid var(--line);border-radius:10px;padding:12px 14px;margin:10px 0;
  font-weight:500;font-size:.9rem;cursor:pointer}
.consent input{margin-top:3px;accent-color:var(--brand);width:17px;height:17px;flex:0 0 auto}

.actions{margin-top:22px;text-align:center}
.btn-primary{
  display:inline-block;background:var(--brand);color:#fff;border:none;
  padding:13px 30px;border-radius:10px;font:inherit;font-weight:700;font-size:1rem;
  cursor:pointer;text-decoration:none;transition:background .15s,transform .05s;
  box-shadow:0 4px 14px rgba(30,64,175,.3)
}
.btn-primary:hover{background:#1d3a9e}
.btn-primary:active{transform:translateY(1px)}

.alert{border-radius:10px;padding:12px 16px;margin:14px 0}
.alert-error{background:#fef2f2;border:1px solid #fecaca;color:#991b1b}
.alert ul{margin:.4em 0 0;padding-left:1.2em}

/* honeypot */
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

/* success */
.success{text-align:center;padding:48px 26px}
.success .check{width:64px;height:64px;border-radius:50%;background:var(--ok);color:#fff;
  display:grid;place-items:center;font-size:34px;margin:0 auto 14px}
.success h1{margin:.2em 0}

/* admin */
.admin-head{display:flex;justify-content:space-between;align-items:center;gap:16px;
  flex-wrap:wrap;margin-bottom:14px}
.tablewrap{overflow-x:auto}
.admin-table{width:100%;border-collapse:collapse;font-size:.86rem}
.admin-table th,.admin-table td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.admin-table thead th{background:var(--soft);position:sticky;top:0}
.admin-table tbody tr:nth-child(even){background:#fafcff}
.nowrap{white-space:nowrap}

/* footer */
.site-footer{border-top:1px solid var(--line);background:#fff;color:var(--muted);
  font-size:.82rem;padding:18px 0;text-align:center}
.site-footer p{margin:0}