/* ทุกค่ามาจาก DESIGN.md — แก้สีที่นี่ที่เดียว */
:root{
  --paper:#F6F7F3;--sheet:#FFFFFF;--ink:#1A1F2E;--carbon:#24407F;--carbon-ink:#FFFFFF;
  --stamp:#C2362B;--muted:#5B6478;--rule:#D9DCE3;
  --ok:#1E7A4C;--warn:#A86A00;--bad:#B3261E;
  --r-sm:6px;--r-md:10px;--speed:150ms;
  --f-head:"Bai Jamjuree",sans-serif;--f-body:"Anuphan",sans-serif;--f-num:"IBM Plex Mono",monospace;
}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){
  --paper:#14171F;--sheet:#1C2030;--ink:#E8EAF0;--carbon:#8FA8E8;--carbon-ink:#0E1424;
  --stamp:#F07468;--muted:#9AA2B5;--rule:#2E3346;--ok:#5FD39A;--warn:#F2B544;--bad:#FF8A80}}
:root[data-theme="dark"]{
  --paper:#14171F;--sheet:#1C2030;--ink:#E8EAF0;--carbon:#8FA8E8;--carbon-ink:#0E1424;
  --stamp:#F07468;--muted:#9AA2B5;--rule:#2E3346;--ok:#5FD39A;--warn:#F2B544;--bad:#FF8A80}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--ink);font:400 17px/1.7 var(--f-body)}
a{color:var(--carbon)}
.bar{border-bottom:1px solid var(--rule);background:var(--sheet)}
.bar-in{max-width:980px;margin:0 auto;padding:12px 16px;display:flex;justify-content:space-between;align-items:center;gap:16px}
.logo{font:700 19px/1 var(--f-head);color:var(--ink);text-decoration:none;letter-spacing:.2px}
.bar nav a{font-size:15px;color:var(--muted);text-decoration:none;margin-left:16px}
.wrap{max-width:680px;margin:0 auto;padding:32px 16px 64px}
.wide{max-width:1100px}
h1,h2,h3{font-family:var(--f-head);line-height:1.3;margin:0 0 12px}
h1{font-size:clamp(30px,6vw,46px);font-weight:700;letter-spacing:-.3px}
h2{font-size:24px;font-weight:700;margin-top:48px}
h3{font-size:18px;font-weight:600}
.lead{font-size:19px;color:var(--muted);font-weight:300}
.num{font-family:var(--f-num);font-variant-numeric:tabular-nums;font-weight:500}
.muted{color:var(--muted)}
.small{font-size:14px}
ul.ticks{padding-left:0;list-style:none}
ul.ticks li{padding:6px 0 6px 26px;position:relative;border-bottom:1px solid var(--rule)}
ul.ticks li::before{content:"";position:absolute;left:4px;top:15px;width:10px;height:6px;border-left:2px solid var(--carbon);border-bottom:2px solid var(--carbon);transform:rotate(-45deg)}
details{border-bottom:1px solid var(--rule);padding:12px 0}
summary{cursor:pointer;font-weight:600}
/* ใบเสร็จ: ขอบฟันปลาบน-ล่าง */
.receipt{position:relative;background:var(--sheet);padding:28px 24px;margin:40px 0 24px;
  --tooth:10px;
  -webkit-mask:conic-gradient(from -45deg at bottom,#0000,#000 1deg 89deg,#0000 90deg) bottom/var(--tooth) 51% repeat-x,
               conic-gradient(from 135deg at top,#0000,#000 1deg 89deg,#0000 90deg) top/var(--tooth) 51% repeat-x;
  mask:conic-gradient(from -45deg at bottom,#0000,#000 1deg 89deg,#0000 90deg) bottom/var(--tooth) 51% repeat-x,
       conic-gradient(from 135deg at top,#0000,#000 1deg 89deg,#0000 90deg) top/var(--tooth) 51% repeat-x}
.receipt-wrap{filter:drop-shadow(0 1px 1px rgba(20,25,40,.12)) drop-shadow(0 6px 18px rgba(20,25,40,.08))}
.receipt h2{margin-top:0;font-size:20px}
.line{display:flex;justify-content:space-between;gap:16px;padding:8px 0;border-bottom:1px dashed var(--rule)}
.line.total{border-bottom:0;border-top:2px solid var(--ink);margin-top:8px;padding-top:12px;font-weight:600}
.price{color:var(--stamp)}
label{display:block;font-weight:600;font-size:15px;margin:16px 0 6px}
input[type=text],input[type=email],input[type=tel]{width:100%;font:inherit;color:var(--ink);background:var(--paper);border:1px solid var(--rule);border-radius:var(--r-sm);padding:10px 12px;transition:border-color var(--speed) ease-out}
input:focus{outline:none;border-color:var(--carbon)}
.bump{display:flex;gap:12px;align-items:flex-start;border:2px dashed var(--carbon);border-radius:var(--r-md);padding:14px;margin:20px 0;cursor:pointer}
.bump input{width:22px;height:22px;margin-top:3px;flex:none;accent-color:var(--carbon)}
.methods{display:grid;gap:8px;margin-top:8px}
.methods label{display:flex;gap:10px;align-items:center;font-weight:400;margin:0;border:1px solid var(--rule);border-radius:var(--r-sm);padding:10px 12px;cursor:pointer}
.methods input{accent-color:var(--carbon)}
.btn{display:block;width:100%;text-align:center;font:600 18px/1.3 var(--f-body);border:0;border-radius:var(--r-sm);padding:15px 18px;cursor:pointer;text-decoration:none;
  background:var(--carbon);color:var(--carbon-ink);transition:background-color var(--speed) ease-out,box-shadow var(--speed) ease-out;margin-top:20px}
.btn:hover{box-shadow:0 0 0 3px color-mix(in srgb,var(--carbon) 25%,transparent)}
.btn:disabled{opacity:.6;cursor:progress}
.btn.ghost{background:transparent;color:var(--muted);font-weight:400;font-size:15px;text-decoration:underline;margin-top:8px}
a:focus-visible,button:focus-visible,input:focus-visible,summary:focus-visible,label:focus-within{outline:2px solid var(--carbon);outline-offset:2px}
.alert{border:1px solid var(--bad);color:var(--bad);border-radius:var(--r-sm);padding:10px 14px;margin:16px 0;background:color-mix(in srgb,var(--bad) 7%,transparent)}
.note{border-left:3px solid var(--warn);padding:8px 12px;font-size:15px;color:var(--muted);margin:16px 0}
.qr{display:block;width:min(280px,100%);margin:16px auto;background:#fff;padding:8px;border-radius:var(--r-sm)}
.steps-pay{padding-left:20px}
.steps-pay li{margin:6px 0}
/* ลูกเล่นเด่น: ตรายาง "ชำระแล้ว" */
.stamp{position:absolute;right:18px;top:18px;transform:rotate(-8deg);border:3px solid var(--stamp);color:var(--stamp);
  font:700 20px/1 var(--f-head);padding:8px 12px;border-radius:var(--r-sm);letter-spacing:1px;opacity:.9;pointer-events:none}
.stamp.fresh{animation:stamp 160ms ease-out both}
@keyframes stamp{from{transform:rotate(-8deg) scale(1.3);opacity:0}to{transform:rotate(-8deg) scale(1);opacity:.9}}
@media (prefers-reduced-motion:reduce){.stamp.fresh{animation:none}}
.files a{display:flex;justify-content:space-between;gap:12px;padding:12px 0;border-bottom:1px solid var(--rule);text-decoration:none;font-weight:600}
.copy{display:flex;gap:8px;margin-top:8px}
.copy input{flex:1;min-width:0;font:13px var(--f-num)}
.copy button{font:inherit;font-size:14px;border:1px solid var(--rule);background:var(--sheet);color:var(--ink);border-radius:var(--r-sm);padding:0 12px;cursor:pointer}
footer{border-top:1px solid var(--rule);color:var(--muted);font-size:14px}
footer .wrap{padding-top:20px;padding-bottom:32px}
/* หลังบ้าน */
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{text-align:left;padding:7px 8px;border-bottom:1px solid var(--rule);vertical-align:top}
th{font-weight:600;color:var(--muted);font-size:13px}
td.r,th.r{text-align:right}
.tiles{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:1px;background:var(--rule);border:1px solid var(--rule);border-radius:var(--r-md);overflow:hidden;margin:16px 0 32px}
.tile{background:var(--sheet);padding:14px 16px}
.tile b{display:block;font:500 26px/1.2 var(--f-num)}
.chk{display:flex;gap:10px;padding:6px 0;border-bottom:1px solid var(--rule);font-size:15px}
.chk .dot{flex:none;width:10px;height:10px;border-radius:50%;margin-top:8px}
.ok{background:var(--ok)}.bad{background:var(--bad)}
.scroll{overflow-x:auto}
@media (max-width:640px){body{font-size:16px}.bar nav a{margin-left:12px}.receipt{padding:24px 16px}}
[hidden]{display:none!important}