:root{
  --bg1:#eaf3ff;
  --bg2:#f3e8ff;
  --glass:#ffffff88;
  --border:#ffffffcc;
  --accent:#5b8cff;       /* ฟ้า */
  --accent2:#a56bff;      /* ม่วงอ่อน */
  --text:#1b2559;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;font-family:system-ui,-apple-system,Segoe UI,Roboto,TH Sarabun New,sans-serif;background:linear-gradient(135deg,var(--bg1),var(--bg2));color:var(--text)}
.container{max-width:1100px;margin:24px auto;padding:0 16px}
.card{
  background:linear-gradient(135deg,#ffffffaa,#ffffff66);
  border:1px solid var(--border);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius:20px;padding:20px;box-shadow:0 8px 24px #00000014;
}
header.nav{
  position:sticky;top:0;z-index:10;
  background:linear-gradient(135deg,#ffffffdd,#ffffff99);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--border);
}
nav.bar{display:flex;align-items:center;gap:12px;max-width:1100px;margin:0 auto;padding:12px 16px}
.logo{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--accent)}
.badge{padding:4px 10px;border:1px solid var(--border);border-radius:999px;background:var(--glass)}
h1,h2{margin:0 0 12px 0}
h1{font-size:22px} h2{font-size:18px}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.grid-1{display:grid;grid-template-columns:1fr;gap:16px}
label{font-weight:600;margin:8px 0 6px;display:block}
input[type=text], input[type=date], input[type=email], textarea, select{
  width:100%;padding:10px 12px;border-radius:12px;border:1px solid #e8e8ff;background:#ffffffcc;
}
input[readonly]{background:#f3f5ff;border-style:dashed;color:#667}
textarea{min-height:90px}
.row{display:flex;gap:10px}
.row > *{flex:1}
.btn{
  appearance:none;cursor:pointer;padding:10px 14px;border-radius:12px;border:1px solid var(--border);
  background:linear-gradient(135deg,var(--accent),var(--accent2));color:white;font-weight:700;
  box-shadow:0 8px 16px #5b8cff33;
}
.btn.secondary{background:linear-gradient(135deg,#ffffff,#f7f7ff);color:var(--text)}
.btn.ghost{background:transparent;color:var(--accent);border:1px dashed var(--accent)}
.btn.danger{background:linear-gradient(135deg,#ff6b6b,#ff8f8f)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.readonly .btn-group{display:none}
.notice{padding:8px 12px;border-radius:12px;background:#fff9;border:1px dashed var(--border)}
.img-thumb{max-width:160px;border-radius:12px;border:1px solid var(--border);background:#fff}
hr{border:none;border-top:1px dashed #ddd;margin:16px 0}
footer{opacity:.8;font-size:12px;text-align:center;margin:20px 0}