:root{
  --bg:#f4f6fb; --card:#fff; --ink:#1b2a4a; --muted:#65708c; --line:#e3e7f0;
  --brand:#2f57d8; --brand-d:#1f3aa8; --ok:#137a4b; --okbg:#e6f5ec;
  --err:#b3261e; --errbg:#fdeceb; --warn:#8a6100; --warnbg:#fdf3e0;
}
*{box-sizing:border-box}
body{margin:0;font-family:"Sarabun","Segoe UI",Tahoma,sans-serif;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.55}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}

.topbar{display:flex;align-items:center;gap:18px;flex-wrap:wrap;background:var(--card);
  border-bottom:1px solid var(--line);padding:12px 22px}
.brand{font-weight:700;font-size:17px;color:var(--ink)}
.topbar nav{display:flex;gap:6px;flex-wrap:wrap}
.topbar nav a{padding:6px 12px;border-radius:8px;color:var(--muted);font-weight:600}
.topbar nav a:hover{background:var(--bg);text-decoration:none}
.topbar nav a.on{background:var(--brand);color:#fff}
.who{margin-left:auto;color:var(--muted);font-size:13px}
.logout{color:var(--err);font-weight:600}

.wrap{max-width:1040px;margin:26px auto;padding:0 18px}
.foot{text-align:center;color:var(--muted);font-size:12px;padding:28px 0}

.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;margin-bottom:20px}
.card h2{margin:.1em 0 .6em;font-size:19px}
.card h3{margin:1em 0 .5em;font-size:16px}
.grid{display:grid;gap:18px}
.grid.c2{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid.c3{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.muted{color:var(--muted)}
.right{text-align:right}
.center{text-align:center}
.mt0{margin-top:0}

label{display:block;font-weight:600;margin:12px 0 4px;font-size:14px}
input[type=text],input[type=password],input[type=number],input[type=file],select,textarea{
  width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:9px;font:inherit;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:2px solid var(--brand);border-color:var(--brand)}
.inline{display:flex;gap:10px;flex-wrap:wrap;align-items:end}
.inline > div{flex:1;min-width:120px}

.btn{display:inline-block;background:var(--brand);color:#fff;border:0;border-radius:9px;
  padding:10px 18px;font:inherit;font-weight:700;cursor:pointer}
.btn:hover{background:var(--brand-d);text-decoration:none}
.btn.sec{background:#eef1f8;color:var(--ink)}
.btn.sec:hover{background:#e1e6f3}
.btn.danger{background:var(--err)}
.btn:disabled{opacity:.5;cursor:not-allowed}
.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}

table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:8px 10px;border-bottom:1px solid var(--line);text-align:left}
th{background:#f7f9fd;font-size:13px;color:var(--muted);position:sticky;top:0}
td.num,th.num{text-align:right;font-variant-numeric:tabular-nums}
tbody tr:hover{background:#f9fbff}
.tablewrap{overflow:auto;max-height:70vh;border:1px solid var(--line);border-radius:10px}

.flash{padding:11px 15px;border-radius:10px;margin-bottom:18px;font-weight:600}
.flash.ok{background:var(--okbg);color:var(--ok)}
.flash.err{background:var(--errbg);color:var(--err)}
.flash.warn{background:var(--warnbg);color:var(--warn)}

.pill{display:inline-block;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:700}
.pill.gold{background:#fef3c7;color:#92600b}
.pill.silver{background:#e8edf3;color:#42546b}
.pill.join{background:#eef1f8;color:#57617c}
.pill.none{background:#fdeceb;color:#b3261e}

.stat{background:#f7f9fd;border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.stat b{display:block;font-size:26px;color:var(--brand-d)}
.stat span{font-size:13px;color:var(--muted)}

/* login picker */
.pick{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));margin-top:10px}
.pick a{display:block;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;text-align:center;color:var(--ink);font-weight:700}
.pick a:hover{border-color:var(--brand);text-decoration:none;box-shadow:0 4px 18px rgba(47,87,216,.12)}
.pick a i{display:block;font-size:34px;margin-bottom:8px;font-style:normal}
.narrow{max-width:420px;margin:40px auto}

/* certificate layout editor */
.stage{position:relative;width:100%;background:#dfe4ee;border:1px solid var(--line);border-radius:8px;overflow:hidden;user-select:none}
.stage img{display:block;width:100%;height:auto;pointer-events:none}
.fieldbox{position:absolute;border:2px dashed var(--brand);background:rgba(47,87,216,.10);
  color:var(--ink);font-size:12px;padding:2px 4px;cursor:move;white-space:nowrap;overflow:hidden}
.fieldbox .tag{position:absolute;top:-18px;left:0;background:var(--brand);color:#fff;font-size:11px;padding:0 6px;border-radius:4px}
.bars{display:flex;align-items:flex-end;gap:4px;height:140px;padding:8px;background:#f7f9fd;border-radius:10px;border:1px solid var(--line)}
.bars .b{flex:1;background:var(--brand);border-radius:4px 4px 0 0;min-height:2px;position:relative}
.bars .b.me{background:var(--ok)}
.hist-x{display:flex;justify-content:space-between;font-size:11px;color:var(--muted);margin-top:4px}