:root{color-scheme:light;--accent:#3B82F6;--accent-h:#2563EB;--bg:#F8FAFC;--bg2:#F1F5F9;--card:#FFFFFF;--input:#F8FAFC;--text:#0F172A;--muted:#64748B;--line:#E2E8F0;--soft:#EFF6FF;--soft-t:#1D4ED8;--ok:#15803D;--ok-bg:#DCFCE7;--warn:#B45309;--warn-bg:#FEF3C7;--bad:#DC2626;--bad-bg:#FEE2E2;--bubble:#F1F5F9;--r:14px;--sh:0 1px 2px rgba(15,23,42,.04),0 8px 24px rgba(15,23,42,.06)}
[data-theme=dark]{color-scheme:dark;--bg:#0F172A;--bg2:#1E293B;--card:#1E293B;--input:#0F172A;--text:#E2E8F0;--muted:#94A3B8;--line:#334155;--soft:rgba(59,130,246,.14);--soft-t:#93C5FD;--ok:#4ADE80;--ok-bg:rgba(34,197,94,.16);--warn:#FBBF24;--warn-bg:rgba(245,158,11,.16);--bad:#F87171;--bad-bg:rgba(239,68,68,.16);--bubble:#334155;--sh:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25)}
*{box-sizing:border-box;margin:0}
html{-webkit-text-size-adjust:100%}
body{font-family:'Noto Sans Thai','Sarabun',system-ui,-apple-system,'Segoe UI',sans-serif;background:var(--bg);color:var(--text);line-height:1.55;font-size:15px;min-height:100vh}
body.lock{overflow:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
[hidden]{display:none!important}
.ico{display:inline-flex;flex:none}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:40px;padding:0 18px;border-radius:10px;border:1px solid transparent;background:var(--bg2);font-weight:600;font-size:14px;transition:background .15s,transform .05s}
.btn:active{transform:translateY(1px)}
.btn.primary{background:var(--accent);color:#fff}.btn.primary:hover{background:var(--accent-h)}
.btn.soft{background:var(--soft);color:var(--soft-t)}
.btn.ghost{background:transparent;border-color:var(--line)}
.btn.danger{background:var(--bad-bg);color:var(--bad)}
.btn.block{width:100%}
.btn.sm{min-height:34px;padding:0 12px;font-size:13px}
.btn:disabled{opacity:.5;cursor:not-allowed}
.icon-btn{display:inline-grid;place-items:center;width:38px;height:38px;border-radius:10px;border:0;background:transparent;color:var(--muted)}
.icon-btn:hover{background:var(--bg2);color:var(--accent)}

/* header */
.site-head{position:sticky;top:12px;z-index:20;margin-top:12px}
.bar{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:10px 16px;background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh)}
.brand{display:flex;align-items:center;gap:10px;user-select:none;-webkit-user-select:none;cursor:pointer}
.brand img{width:38px;height:38px}
.brand b{font-size:18px;line-height:1.1;display:block}.brand b span{color:var(--accent)}
.brand small{color:var(--muted);font-size:11px}
.pill{display:inline-flex;align-items:center;padding:2px 10px;border-radius:99px;background:var(--soft);color:var(--soft-t);font-size:12px;font-weight:700}
.top-actions{display:flex;gap:2px;align-items:center}

/* hero */
.hero{margin-top:18px;display:grid;grid-template-columns:1.1fr .9fr;gap:12px;align-items:center;padding:28px 32px;border-radius:var(--r);border:1px solid var(--line);background:linear-gradient(120deg,var(--soft),var(--card))}
.hero h1{font-size:clamp(24px,4vw,34px);line-height:1.25}
.hero p{color:var(--muted);margin:8px 0 18px}
.hero svg{width:100%;max-height:200px}

/* product grid */
.sec-head{display:flex;align-items:end;justify-content:space-between;margin:30px 0 14px}
.sec-head h2{font-size:20px}.sec-head p{color:var(--muted);font-size:13px}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(172px,1fr));gap:14px}
.pcard{padding:12px;display:flex;flex-direction:column;gap:6px}
.pimg{aspect-ratio:1;border-radius:10px;background:var(--bg2);overflow:hidden}
.pimg img{width:100%;height:100%;object-fit:cover}
.pcard h3{font-size:14px;margin-top:6px;line-height:1.35;overflow-wrap:anywhere}
.price{font-size:19px;font-weight:700;color:var(--accent)}
.sold{font-size:12px;color:var(--muted)}
.pcard .btn{width:100%}
.pcard .btns{display:grid;gap:8px;margin-top:auto;padding-top:6px}
.empty{grid-column:1/-1;text-align:center;padding:48px 16px;color:var(--muted);border:1px dashed var(--line);border-radius:var(--r)}
.empty .ico{color:var(--accent);margin-bottom:6px}

/* chat */
.chat-card{margin-top:30px;overflow:hidden}
.chat-head{display:flex;align-items:center;gap:12px;padding:14px 18px;border-bottom:1px solid var(--line)}
.chat-head .tt{flex:1}.chat-head h3{font-size:17px}.chat-head p{font-size:12px;color:var(--muted)}
.chat-head .logo-bubble{width:40px;height:40px;border-radius:50%;background:var(--accent);color:#fff;display:grid;place-items:center}
.chat-list{height:340px;overflow-y:auto;padding:16px 18px;display:flex;flex-direction:column;gap:12px}
.msg{display:flex;align-items:flex-end;gap:8px;max-width:86%}
.msg.me{align-self:flex-end;flex-direction:row-reverse}
.avatar{width:32px;height:32px;border-radius:50%;background:var(--soft);display:grid;place-items:center;flex:none}
.avatar img{width:20px;height:20px}
.bubble{padding:8px 14px;border-radius:16px;background:var(--bubble);overflow-wrap:anywhere;white-space:pre-wrap}
.msg.me .bubble{background:var(--accent);color:#fff}
.bubble a{text-decoration:underline}
.msg time{font-size:11px;color:var(--muted);flex:none}
.chat-img{max-width:220px;max-height:220px;border-radius:10px;margin:2px 0}
.chat-input{display:flex;gap:8px;align-items:center;padding:12px 14px;border-top:1px solid var(--line)}
.chat-input .input{flex:1;border-radius:99px}
.send{width:42px;height:42px;border-radius:50%;border:0;background:var(--accent);color:#fff;display:grid;place-items:center}
.send:hover{background:var(--accent-h)}
.foot{margin:40px 0 28px;text-align:center;color:var(--muted);font-size:13px}
.foot button{background:none;border:0;color:var(--soft-t);text-decoration:underline;font-size:13px}

/* forms */
.field{display:grid;gap:6px;margin-bottom:14px}
.field>label,.lbl{font-weight:600;font-size:14px}
.req{color:var(--bad)}
.input,.field input,.field textarea,.field select,select.input{width:100%;min-height:44px;padding:9px 14px;border-radius:10px;border:1px solid var(--line);background:var(--input);outline:none}
.input:focus,.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(59,130,246,.18)}
.field textarea{min-height:110px;resize:vertical}
.iw{display:flex;align-items:center;gap:10px;padding:0 14px;border:1px solid var(--line);background:var(--input);border-radius:10px;color:var(--muted)}
.iw:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(59,130,246,.18)}
.iw input{border:0!important;box-shadow:none!important;background:transparent!important;padding:9px 0!important;min-height:44px;flex:1;min-width:0;color:var(--text);outline:none}
.iw .suffix{font-size:13px;white-space:nowrap}
.iw button{background:none;border:0;color:var(--muted);display:grid}
.hint{font-size:12px;color:var(--muted)}
.cnt{text-align:right;font-size:12px;color:var(--muted)}
.box{padding:14px 16px;border-radius:12px;background:var(--soft);color:var(--text)}
.box.warn{background:var(--warn-bg)}
.box b{color:var(--soft-t)}
.box.warn b{color:var(--warn)}
.upload-row{display:grid;grid-template-columns:1fr 120px;gap:12px}
.upload{display:grid;place-items:center;gap:4px;text-align:center;padding:18px 10px;border:1.5px dashed var(--accent);border-radius:12px;color:var(--accent);cursor:pointer;background:transparent}
.upload small{color:var(--muted);font-size:12px}
.upload.busy{opacity:.5;pointer-events:none}
.upload-prev{display:grid;place-items:center;border-radius:12px;background:var(--soft);color:var(--accent);overflow:hidden;min-height:100px}
.upload-prev img{width:100%;height:100%;object-fit:contain;max-height:140px}

/* modal & toast */
.overlay{position:fixed;inset:0;z-index:50;background:rgba(15,23,42,.55);display:grid;place-items:center;padding:16px}
.modal{width:min(480px,100%);max-height:92vh;overflow:auto;background:var(--card);border:1px solid var(--line);border-radius:18px;box-shadow:var(--sh)}
.modal-head{display:flex;align-items:center;justify-content:space-between;padding:14px 16px 6px 20px;position:sticky;top:0;background:var(--card)}
.modal-head h3{font-size:17px;overflow-wrap:anywhere}
.modal-body{padding:10px 20px 20px}
.methods{display:grid;gap:10px;margin-top:12px}
.method{display:flex;align-items:center;gap:12px;padding:14px;border-radius:12px;border:1.5px solid var(--line);background:var(--input);text-align:left;width:100%}
.method:hover{border-color:var(--accent)}
.method .ico{color:var(--accent)}
.method small{display:block;color:var(--muted)}
.amount{text-align:center;padding:14px;border-radius:12px;background:var(--soft)}
.amount b{display:block;font-size:30px;color:var(--accent);line-height:1.2}
.copy-row{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 14px;border:1px solid var(--line);border-radius:10px;margin:10px 0}
.qr{width:200px;max-width:70%;margin:12px auto;border-radius:12px;background:#fff;padding:8px}
.steps{display:flex;gap:6px;margin:4px 0 12px}
.steps i{flex:1;height:4px;border-radius:4px;background:var(--line)}.steps i.on{background:var(--accent)}
.big-order{font-size:26px;font-weight:800;color:var(--accent);text-align:center;letter-spacing:.5px}
.toast-wrap{position:fixed;left:0;right:0;bottom:20px;display:grid;justify-items:center;gap:8px;z-index:80;pointer-events:none;padding:0 12px}
.toast{padding:10px 18px;border-radius:99px;background:#0F172A;color:#fff;font-size:14px;box-shadow:var(--sh);animation:up .2s}
.toast.err{background:var(--bad)}
@keyframes up{from{opacity:0;transform:translateY(8px)}}

/* admin */
.adm-head{position:sticky;top:0;z-index:20;background:var(--bg);padding:12px 0}
.adm{display:grid;grid-template-columns:230px 1fr;gap:18px;padding-bottom:30px;align-items:start}
.side{padding:12px;position:sticky;top:76px;display:grid;gap:4px}
.side a,.side button{display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:10px;font-weight:500;color:var(--text);background:none;border:0;text-align:left;width:100%}
.side a:hover,.side button:hover{background:var(--bg2)}
.side a.active{background:var(--accent);color:#fff}
.side hr{border:0;border-top:1px solid var(--line);margin:6px 0}
.side small{color:var(--muted);padding:8px 14px 2px;font-size:12px}
.main>h1{font-size:24px}.main>.sub{color:var(--muted);margin-bottom:18px}
.cards2{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:14px}
.pad{padding:18px}
.pad h3{font-size:16px}
.big-ico{width:44px;height:44px;border-radius:12px;background:var(--soft);color:var(--accent);display:grid;place-items:center;margin-bottom:10px}
.pay-row{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;border:1px solid var(--line);border-radius:10px;margin-top:10px;font-weight:600}
.dot{font-size:12px;font-weight:600;display:inline-flex;align-items:center;gap:6px}
.dot::before{content:'';width:8px;height:8px;border-radius:50%;background:var(--muted)}
.dot.on{color:var(--ok)}.dot.on::before{background:var(--ok)}
.tbl-wrap{overflow-x:auto}
.tbl{width:100%;border-collapse:collapse;font-size:14px;min-width:560px}
.tbl th{text-align:left;font-weight:600;color:var(--muted);padding:10px 12px;background:var(--bg2);font-size:13px}
.tbl th:first-child{border-radius:10px 0 0 10px}.tbl th:last-child{border-radius:0 10px 10px 0}
.tbl td{padding:12px;border-bottom:1px solid var(--line)}
.tbl tr.row{cursor:pointer}.tbl tr.row:hover td{background:var(--bg2)}
.badge{display:inline-block;padding:2px 12px;border-radius:99px;font-size:12px;font-weight:600}
.badge.pending{background:var(--warn-bg);color:var(--warn)}
.badge.paid{background:var(--ok-bg);color:var(--ok)}
.badge.delivered{background:var(--soft);color:var(--soft-t)}
.tabs{display:grid;grid-template-columns:1fr 1fr;gap:6px;padding:6px;margin-bottom:14px}
.tabs button{display:flex;align-items:center;justify-content:center;gap:8px;min-height:42px;border:0;border-radius:10px;background:var(--bg2);font-weight:600;color:var(--muted)}
.tabs button.on{background:var(--accent);color:#fff}
.switch{position:relative;width:46px;height:26px;flex:none}
.switch input{opacity:0;position:absolute;inset:0;width:100%;height:100%;margin:0;cursor:pointer;z-index:1}
.switch i{position:absolute;inset:0;border-radius:99px;background:var(--line);transition:.2s}
.switch i::after{content:'';position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:#fff;transition:.2s}
.switch input:checked+i{background:var(--accent)}.switch input:checked+i::after{transform:translateX(20px)}
.sec-title{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.sec-title .tt{flex:1}.sec-title p{font-size:13px;color:var(--muted)}
.plist{display:grid;gap:10px;margin-top:14px}
.pitem{display:flex;align-items:center;gap:12px;padding:10px;border:1px solid var(--line);border-radius:12px}
.pitem img,.pitem .ph{width:52px;height:52px;border-radius:10px;object-fit:cover;background:var(--bg2);flex:none}
.pitem .tt{flex:1;min-width:0}.pitem .tt b{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.detail{display:grid;grid-template-columns:1fr 1.15fr;gap:14px;align-items:start}
.kv{display:grid;grid-template-columns:110px 1fr auto;gap:10px;align-items:center;padding:12px 0;border-bottom:1px solid var(--line);font-size:14px}
.kv:last-child{border:0}.kv>span:first-child{color:var(--muted)}.kv .v{overflow-wrap:anywhere}
.slip{max-width:260px;border-radius:10px;border:1px solid var(--line)}
.prod-mini{display:flex;gap:10px;align-items:center}.prod-mini img{width:48px;height:48px;border-radius:8px;object-fit:cover}
.back{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.back h1{font-size:20px}
.login{min-height:100vh;display:grid;place-items:center;padding:20px}
.login .card{width:min(430px,100%);padding:30px 28px}
.login .logo{display:grid;justify-items:center;gap:2px;margin-bottom:18px;text-align:center}
.login .logo img{width:64px}.login .logo b{font-size:26px}.login .logo b span{color:var(--accent)}
.login h2{font-size:18px}
.login .tr{position:fixed;top:14px;right:14px}

@media(max-width:820px){
  .hero{grid-template-columns:1fr;padding:22px}.hero svg{display:none}
  .adm{grid-template-columns:1fr}.side{position:static;display:flex;overflow-x:auto;gap:4px;padding:8px}
  .side a,.side button{white-space:nowrap;width:auto}.side hr,.side small{display:none}
  .cards2,.detail{grid-template-columns:1fr}
  .chat-list{height:300px}
}
@media(max-width:420px){.brand small{display:none}.upload-row{grid-template-columns:1fr}.kv{grid-template-columns:90px 1fr auto}}