/* V20 – Compact app layout (ไม่มี hero banner)
   สีหลักดึงจากหน้าตั้งค่า: --brand-primary / --brand-secondary
   Type: IBM Plex Sans Thai */
:root{
  --brand:var(--brand-primary,#3159d9);
  --brand-soft:color-mix(in srgb,var(--brand) 9%,#fff);
  --brand-ring:color-mix(in srgb,var(--brand) 18%,transparent);
  --ink:#0f172a; --text:#1e293b; --muted:#64748b;
  --bg:#f4f6fb; --card:#fff; --line:#e5e9f2; --line-2:#cbd5e1;
  --ok:#16a34a;
  --r-sm:10px; --r:14px; --r-lg:20px;
  --shadow:0 1px 2px rgba(15,23,42,.04),0 8px 24px -16px rgba(15,23,42,.12);
  --font:'IBM Plex Sans Thai',system-ui,sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;font-family:var(--font);font-size:15px;line-height:1.6;color:var(--text);background:var(--bg);-webkit-font-smoothing:antialiased}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,p,dl,dd,figure,fieldset{margin:0}
fieldset{border:0;padding:0;min-width:0}
.hidden{display:none!important}
.wrap{width:min(1180px,calc(100% - 40px));margin-inline:auto}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}

/* ---------- app bar ---------- */
.appbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);backdrop-filter:saturate(1.6) blur(14px);-webkit-backdrop-filter:saturate(1.6) blur(14px);border-bottom:1px solid var(--line)}
.appbar .wrap{display:flex;align-items:center;gap:16px;height:64px}
.brand{display:flex;align-items:center;gap:12px;min-width:0;margin-right:auto;color:var(--ink);text-decoration:none}
.brand-logo{width:40px;height:40px;flex:none;border-radius:12px;display:grid;place-items:center;overflow:hidden;background:var(--brand-soft);color:var(--brand);font-size:18px}
.brand-logo img{width:100%;height:100%;object-fit:contain}
.brand-text{display:flex;flex-direction:column;min-width:0;line-height:1.3}
.brand-text b{font-size:.98rem;font-weight:700}
.brand-text small{font-size:.78rem;color:var(--muted)}
.brand-text b,.brand-text small{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.admin-link{flex:none;display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--text);font-size:.88rem;font-weight:500;text-decoration:none;transition:border-color .15s,color .15s}
.admin-link:hover{border-color:var(--brand);color:var(--brand)}
.admin-link i{font-size:.8rem}

/* ---------- intro + stats ---------- */
.intro{display:flex;align-items:flex-end;justify-content:space-between;gap:20px 28px;flex-wrap:wrap;padding:28px 0 20px}
.intro h1{font-size:clamp(1.5rem,3vw,1.9rem);font-weight:700;line-height:1.3;letter-spacing:-.01em;color:var(--ink)}
.intro p{margin-top:4px;max-width:56ch;color:var(--muted)}
.stats{display:flex;flex-wrap:wrap;gap:8px}
.stats>div{display:flex;align-items:center;gap:10px;padding:8px 14px 8px 8px;background:var(--card);border:1px solid var(--line);border-radius:var(--r)}
.stats>div>i{width:32px;height:32px;flex:none;border-radius:10px;display:grid;place-items:center;background:var(--brand-soft);color:var(--brand);font-size:.85rem}
.stats dt{font-size:.74rem;color:var(--muted);line-height:1.2}
.stats dd{font-size:.76rem;color:var(--muted);line-height:1.3}
.stats b{font-size:1.1rem;font-weight:700;color:var(--ink);font-variant-numeric:tabular-nums;margin-right:2px}

/* ---------- layout ---------- */
main.wrap{padding-bottom:40px}
.panel{display:grid;grid-template-columns:minmax(0,1fr) 370px;gap:24px;align-items:start}

/* ---------- builder ---------- */
.builder{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:6px 28px 28px;box-shadow:var(--shadow)}
.builder-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 0 8px}
.builder-head h2{font-size:1.15rem;font-weight:700;color:var(--ink)}
.text-btn{display:inline-flex;align-items:center;gap:7px;padding:6px 10px;border:0;border-radius:var(--r-sm);background:none;color:var(--muted);font-size:.88rem;font-weight:500;cursor:pointer;transition:background .15s,color .15s}
.text-btn:hover{color:var(--brand);background:var(--brand-soft)}

.step{padding:22px 0;border-top:1px solid var(--line)}
.builder-head+form .step:first-of-type{border-top:0;padding-top:8px}
.step legend{float:left;width:100%;display:flex;align-items:center;gap:10px;margin-bottom:14px;font-size:1rem;font-weight:600;color:var(--ink)}
.step legend+*,.step>*:not(legend){clear:both}
#wifiFields .grid-2+.field-block{margin-top:16px}
.step-no{width:26px;height:26px;flex:none;border-radius:50%;display:grid;place-items:center;font-size:.8rem;font-weight:700;background:var(--brand);color:#fff}

.type-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:10px}
.type-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;min-height:84px;padding:12px 6px;border:1.5px solid var(--line);border-radius:var(--r);background:#fff;color:var(--muted);font-size:.82rem;font-weight:500;cursor:pointer;transition:border-color .15s,background .15s,color .15s,transform .15s}
.type-btn i{font-size:20px;color:#94a3b8;transition:color .15s}
.type-btn:hover{transform:translateY(-1px);border-color:color-mix(in srgb,var(--brand) 40%,var(--line));color:var(--ink)}
.type-btn.active{border-color:var(--brand);background:var(--brand-soft);color:var(--brand);font-weight:600;box-shadow:0 0 0 3px var(--brand-ring)}
.type-btn.active i{color:var(--brand)}

.field-block{margin-top:16px}
.step legend+.type-grid,.step legend+.field-block,.step legend+div>.field-block:first-child{margin-top:0}
.lbl{display:block;margin-bottom:6px;font-size:.88rem;font-weight:600;color:var(--ink)}
.opt{margin-left:4px;padding:1px 8px;border-radius:999px;background:#f1f5f9;font-size:.72rem;font-weight:400;color:var(--muted)}
.help{margin-top:6px;font-size:.8rem;color:var(--muted)}
.control{display:block;width:100%;min-height:46px;padding:10px 14px;border:1.5px solid var(--line);border-radius:var(--r-sm);background:#fff;font-size:.95rem;outline:0;transition:border-color .15s,box-shadow .15s}
.control:hover{border-color:var(--line-2)}
.control:focus,.control:focus-within{border-color:var(--brand);box-shadow:0 0 0 4px var(--brand-ring)}
select.control{appearance:none;padding-right:36px;cursor:pointer;background:#fff url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' fill='none' stroke='%2364748b' stroke-width='1.6'/%3E%3C/svg%3E") no-repeat right 14px center}
textarea.control{height:46px;resize:none;overflow:hidden;white-space:nowrap}
textarea.control.tall{height:120px;white-space:pre-wrap;overflow:auto;resize:vertical}
::placeholder{color:#a0aabb}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.grid-2 .field-block{margin-top:0}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.grid-4 .field-block{margin-top:0}
.color-control{display:flex;align-items:center;gap:10px;cursor:pointer;padding:7px 12px}
.color-control input{width:30px;height:30px;flex:none;padding:0;border:1px solid var(--line);border-radius:8px;background:none;cursor:pointer}
.color-control input::-webkit-color-swatch-wrapper{padding:0}
.color-control input::-webkit-color-swatch{border:0;border-radius:7px}
.color-control input::-moz-color-swatch{border:0;border-radius:7px}
.color-control span{font-family:ui-monospace,SFMono-Regular,monospace;font-size:.82rem;color:var(--muted)}

.upload{display:flex;align-items:center;gap:14px;padding:14px;border:1.5px dashed var(--line-2);border-radius:var(--r);background:#fafbfd;cursor:pointer;font-size:.82rem;color:var(--muted);transition:border-color .15s,background .15s}
.upload i{width:44px;height:44px;flex:none;display:grid;place-items:center;border-radius:12px;background:#fff;border:1px solid var(--line);font-size:20px;color:var(--brand)}
.upload b{display:block;color:var(--ink);font-size:.92rem;font-weight:600}
.upload:hover{border-color:var(--brand);background:var(--brand-soft)}
.file-name{margin-top:6px;font-size:.82rem;color:var(--ok)}

/* ---------- finish ---------- */
.finish{display:flex;flex-direction:column;gap:12px;padding-top:22px;border-top:1px solid var(--line)}
.check{position:relative;display:flex;gap:12px;align-items:flex-start;padding:14px 16px;border:1.5px solid var(--line);border-radius:var(--r);background:#fff;cursor:pointer;transition:border-color .15s,background .15s}
.check:has(input:checked){border-color:color-mix(in srgb,var(--brand) 40%,var(--line));background:var(--brand-soft)}
.check input{position:absolute;opacity:0;width:1px;height:1px}
.check .box{width:20px;height:20px;flex:none;margin-top:2px;border:1.5px solid var(--line-2);border-radius:6px;background:#fff;display:grid;place-items:center;color:#fff;font-size:11px}
.check input:checked+.box{background:var(--brand);border-color:var(--brand)}
.check input:focus-visible+.box{outline:2px solid var(--brand);outline-offset:2px}
.check b{display:block;font-size:.92rem;font-weight:600;color:var(--ink)}
.check small{display:block;font-size:.8rem;color:var(--muted);line-height:1.5}
.check.disabled{opacity:.5;cursor:not-allowed}
.more-btn{align-self:flex-start;margin-left:-10px}
.more-btn .caret{font-size:.7rem;transition:transform .2s}
.more-btn.open .caret{transform:rotate(180deg)}
.more-panel{display:flex;flex-direction:column;gap:14px;padding:16px;border:1px solid var(--line);border-radius:var(--r);background:#fafbfd}
.more-panel>.field-block{margin-top:0}
.switch-row{position:relative;display:flex;align-items:center;gap:14px;cursor:pointer}
.switch-row input{position:absolute;opacity:0;width:1px;height:1px}
.switch-row>span:not(.switch-ui){flex:1}
.switch-row b{display:block;font-size:.9rem;font-weight:600;color:var(--ink)}
.switch-row small{display:block;font-size:.8rem;color:var(--muted)}
.switch-ui{width:42px;height:24px;flex:none;border-radius:999px;background:var(--line-2);position:relative;transition:background .2s}
.switch-ui:after{content:"";position:absolute;top:3px;left:3px;width:18px;height:18px;border-radius:50%;background:#fff;box-shadow:0 1px 2px rgba(0,0,0,.2);transition:transform .2s}
.switch-row.active .switch-ui{background:var(--brand)}
.switch-row.active .switch-ui:after{transform:translateX(18px)}
.switch-row input:focus-visible~.switch-ui{outline:2px solid var(--brand);outline-offset:2px}
.short-result{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 14px;border-radius:var(--r);background:#ecfdf3;border:1px solid #bbf7d0}
.short-result span{display:block;font-size:.76rem;color:var(--ok)}
.short-result b{font-size:.92rem;word-break:break-all;color:var(--ink)}
.short-result button{flex:none;padding:7px 12px;border:1px solid #bbf7d0;border-radius:var(--r-sm);background:#fff;cursor:pointer;font-size:.85rem}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:10px 18px;border-radius:var(--r-sm);font-size:.95rem;font-weight:600;cursor:pointer;border:1.5px solid transparent;text-decoration:none;transition:filter .15s,transform .15s,border-color .15s,color .15s}
.btn-primary{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 8px 18px -8px color-mix(in srgb,var(--brand) 70%,transparent)}
.btn-primary:hover{filter:brightness(1.08);transform:translateY(-1px)}
.btn-outline{background:#fff;border-color:var(--line);color:var(--text)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.btn-block{width:100%;min-height:52px;font-size:1rem}

/* ---------- preview ---------- */
.preview{position:sticky;top:84px}
.preview-inner{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:20px;box-shadow:var(--shadow)}
.preview-label{display:flex;align-items:center;gap:8px;margin-bottom:14px;font-size:.84rem;font-weight:600;color:var(--muted)}
.live{width:8px;height:8px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 4px rgba(34,197,94,.18);animation:pulse 2s infinite}
@keyframes pulse{50%{box-shadow:0 0 0 7px rgba(34,197,94,0)}}
.sign{border:1px solid var(--line);border-radius:16px;background:#fff;padding:0 0 18px;text-align:center;overflow:hidden}
.sign-school{padding:10px 16px;background:var(--brand);color:#fff;font-size:.82rem;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;border-bottom:3px solid var(--brand-secondary,#f3b545)}
#qrcode{display:flex;justify-content:center;padding:20px 20px 10px;line-height:0}
#qrcode svg,#qrcode canvas{max-width:100%;height:auto}
.sign-name{padding:0 18px;font-size:1.05rem;font-weight:700;line-height:1.4;color:var(--ink);word-break:break-word}
.sign-value{padding:2px 18px 0;font-size:.78rem;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sign-hint{display:inline-flex;align-items:center;gap:6px;margin-top:12px;padding:4px 10px;border-radius:999px;background:#f1f5f9;font-size:.74rem;color:var(--muted)}
.dl-row{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:16px}
.copy-btn{width:100%;justify-content:center;margin-top:8px}
.note{display:flex;gap:8px;margin-top:12px;padding:10px 12px;border-radius:var(--r-sm);background:#f8fafc;font-size:.78rem;color:var(--muted);line-height:1.6}
.note i{margin-top:4px;color:var(--brand)}

.jump-preview{display:none}

/* ---------- footer / loading ---------- */
.footer{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;padding:22px 0 30px;border-top:1px solid var(--line);font-size:.82rem;color:var(--muted)}
.loading-overlay{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;background:rgba(15,23,42,.35);backdrop-filter:blur(3px)}
.loading-overlay.show{display:flex}
.loader-card{min-width:220px;padding:22px 26px;border-radius:var(--r);background:#fff;text-align:center;box-shadow:0 20px 50px rgba(0,0,0,.2)}
.spinner{width:36px;height:36px;margin:0 auto 12px;border-radius:50%;border:3px solid var(--brand-soft);border-top-color:var(--brand);animation:spin .8s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.swal2-popup{font-family:var(--font)!important;border-radius:var(--r-lg)!important}

/* ---------- responsive ---------- */
@media (max-width:1060px){
  .panel{grid-template-columns:minmax(0,1fr) 330px}
  .type-grid{grid-template-columns:repeat(3,1fr)}
  .grid-4{grid-template-columns:1fr 1fr}
}
@media (max-width:820px){
  .panel{grid-template-columns:1fr}
  .preview{position:static}
  .preview-inner{max-width:460px;margin:0 auto}
  .jump-preview{display:inline-flex;align-items:center;gap:8px;position:fixed;right:16px;bottom:16px;z-index:40;padding:12px 18px;border-radius:999px;background:var(--ink);color:#fff;font-size:.9rem;font-weight:600;text-decoration:none;box-shadow:0 10px 24px -8px rgba(15,23,42,.5);transition:opacity .2s,transform .2s}
  .jump-preview.away{opacity:0;transform:translateY(12px);pointer-events:none}
}
@media (max-width:560px){
  .wrap{width:calc(100% - 28px)}
  .appbar .wrap{height:58px}
  .brand-text small,.admin-link span{display:none}
  .admin-link{padding:9px 11px}
  .intro{padding:20px 0 16px}
  .stats{width:100%;display:grid;grid-template-columns:repeat(3,1fr)}
  .stats>div{flex-direction:column;align-items:flex-start;gap:2px;padding:10px 12px}
  .stats>div>i{display:none}
  .builder{padding:4px 16px 20px;border-radius:16px}
  .type-grid{gap:8px}
  .type-btn{min-height:72px;padding:10px 4px;font-size:.78rem}
  .grid-2{grid-template-columns:1fr}
  .preview-inner{padding:16px}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;animation:none!important}html{scroll-behavior:auto}}

/* V22 custom short alias */
.alias-block{margin-top:0}
.prefix-control{display:flex;align-items:center;gap:0;padding:0 0 0 14px;overflow:hidden}
.prefix-control .prefix{flex:none;max-width:55%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:var(--muted);font-size:.88rem;direction:rtl;text-align:left}
.prefix-control input{flex:1;min-width:0;height:44px;border:0;outline:0;background:none;padding:0 14px 0 2px;font-size:.95rem;font-weight:600;color:var(--brand)}
.prefix-control.invalid{border-color:#dc2626;box-shadow:0 0 0 4px rgba(220,38,38,.12)}
.help.err{color:#dc2626}
@media (max-width:560px){.prefix-control .prefix{max-width:45%;font-size:.8rem}}