/* ==========================================================================
   PAKPAY — light UI system
   ========================================================================== */
:root{
  --bg:#ffffff;
  --bg-soft:#f7f8f7;
  --surface:#ffffff;
  --line:#e4e7e4;
  --line-strong:#d2d7d2;
  --ink:#11150f;
  --ink-2:#3f4a3f;
  --muted:#6b7669;
  --accent:#0a6b3d;
  --accent-dark:#075530;
  --accent-soft:#eef5f0;
  --ok:#0a6b3d;
  --ok-bg:#e9f4ed;
  --warn:#8a5a06;
  --warn-bg:#fdf3e2;
  --bad:#a8231b;
  --bad-bg:#fdeceb;
  --radius:8px;
  --shadow:0 1px 2px rgba(17,21,15,.05);
  --shadow-lg:0 4px 20px rgba(17,21,15,.07);
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font:15px/1.6 "Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3,h4{margin:0;font-weight:600;letter-spacing:-.018em;line-height:1.25}
h1{font-size:28px}h2{font-size:20px}h3{font-size:16px}
p{margin:0 0 14px}
code,kbd,pre{font-family:var(--mono)}
hr{border:0;border-top:1px solid var(--line);margin:28px 0}
.mono{font-family:var(--mono)}
.muted{color:var(--muted)}
.small{font-size:13px}
.right{text-align:right}
.center{text-align:center}
.nowrap{white-space:nowrap}
.mt0{margin-top:0}.mb0{margin-bottom:0}
.mt16{margin-top:16px}.mt24{margin-top:24px}.mt32{margin-top:32px}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.wrap-sm{max-width:760px;margin:0 auto;padding:0 24px}

/* ---------- brand ---------- */
.brand{display:inline-flex;align-items:center;gap:9px;font-weight:700;font-size:18px;
  letter-spacing:-.03em;color:var(--ink);text-decoration:none}
.brand:hover{text-decoration:none}
.brand-mark{width:26px;height:26px;border-radius:6px;background:var(--accent);color:#fff;
  display:grid;place-items:center;font-size:12px;font-weight:700;letter-spacing:0}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;
  padding:9px 16px;border-radius:var(--radius);border:1px solid var(--line-strong);
  background:var(--surface);color:var(--ink);font:inherit;font-size:14px;font-weight:500;
  cursor:pointer;transition:.14s ease;text-decoration:none;white-space:nowrap}
.btn:hover{background:var(--bg-soft);text-decoration:none;border-color:var(--muted)}
.btn-primary{background:var(--accent);border-color:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-dark);border-color:var(--accent-dark)}
.btn-danger{color:var(--bad);border-color:#f0c9c6}
.btn-danger:hover{background:var(--bad-bg)}
.btn-sm{padding:5px 11px;font-size:13px}
.btn-lg{padding:13px 26px;font-size:15px}
.btn-block{width:100%}
.btn:disabled{opacity:.5;cursor:not-allowed}

/* ---------- forms ---------- */
.field{margin-bottom:16px}
.field label{display:block;font-size:13px;font-weight:500;color:var(--ink-2);margin-bottom:6px}
.field .hint{font-size:12.5px;color:var(--muted);margin-top:5px}
input[type=text],input[type=email],input[type=password],input[type=number],input[type=url],
input[type=date],select,textarea{
  width:100%;padding:9px 12px;border:1px solid var(--line-strong);border-radius:var(--radius);
  background:#fff;color:var(--ink);font:inherit;font-size:14px;transition:.14s}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent);
  box-shadow:0 0 0 3px var(--accent-soft)}
textarea{resize:vertical;min-height:88px}
select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath d='M2 4.5L6 8.5L10 4.5' stroke='%236b7669' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 12px center;padding-right:32px}
.row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.row-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media(max-width:640px){.row,.row-3{grid-template-columns:1fr}}

/* ---------- cards & panels ---------- */
.card{background:var(--surface);border:1px solid var(--line);border-radius:12px;
  box-shadow:var(--shadow)}
.card-pad{padding:22px}
.card-head{padding:16px 22px;border-bottom:1px solid var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
.card-head h3{font-size:15px}
.card-body{padding:22px}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:14px;margin-bottom:24px}
.stat{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:18px 20px}
.stat .k{font-size:12px;font-weight:500;color:var(--muted);text-transform:uppercase;letter-spacing:.05em}
.stat .v{font-size:25px;font-weight:650;letter-spacing:-.03em;margin-top:7px;font-variant-numeric:tabular-nums}
.stat .sub{font-size:12.5px;color:var(--muted);margin-top:3px}
.stat.accent{background:var(--accent-soft);border-color:#cfe4d7}
.stat.accent .v{color:var(--accent-dark)}

/* ---------- tables ---------- */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
table.tbl{width:100%;border-collapse:collapse;font-size:13.5px}
.tbl th{text-align:left;padding:10px 14px;font-size:11.5px;font-weight:600;color:var(--muted);
  text-transform:uppercase;letter-spacing:.05em;border-bottom:1px solid var(--line);
  background:var(--bg-soft);white-space:nowrap}
.tbl td{padding:12px 14px;border-bottom:1px solid var(--line);vertical-align:middle}
.tbl tr:last-child td{border-bottom:0}
.tbl tbody tr:hover{background:#fbfcfb}
.tbl .num{font-variant-numeric:tabular-nums;text-align:right;white-space:nowrap}
.empty{padding:52px 22px;text-align:center;color:var(--muted);font-size:14px}

/* ---------- badges ---------- */
.badge{display:inline-block;padding:2.5px 9px;border-radius:20px;font-size:11.5px;
  font-weight:600;letter-spacing:.01em;white-space:nowrap}
.badge-ok{background:var(--ok-bg);color:var(--ok)}
.badge-warn{background:var(--warn-bg);color:var(--warn)}
.badge-bad{background:var(--bad-bg);color:var(--bad)}
.badge-muted{background:#eef0ee;color:var(--muted)}

/* ---------- alerts ---------- */
.alert{padding:12px 15px;border-radius:var(--radius);font-size:14px;margin-bottom:18px;
  border:1px solid transparent}
.alert-ok{background:var(--ok-bg);border-color:#c3e0ce;color:#08512e}
.alert-err{background:var(--bad-bg);border-color:#f3ccc9;color:#8c1c16}
.alert-warn{background:var(--warn-bg);border-color:#f0dcb6;color:#7a4f05}
.alert-info{background:#eef2f7;border-color:#d3ddea;color:#31465e}

/* ---------- app shell (admin + merchant) ---------- */
.shell{display:flex;min-height:100vh}
.side{width:236px;flex-shrink:0;background:var(--bg-soft);border-right:1px solid var(--line);
  padding:20px 14px;display:flex;flex-direction:column;gap:4px}
.side .side-brand{padding:4px 10px 20px}
.side .sect{font-size:11px;font-weight:600;color:var(--muted);text-transform:uppercase;
  letter-spacing:.06em;padding:16px 10px 6px}
.side a.nav{display:flex;align-items:center;gap:9px;padding:8px 10px;border-radius:6px;
  color:var(--ink-2);font-size:14px;font-weight:450;text-decoration:none}
.side a.nav:hover{background:#eceeeb;color:var(--ink);text-decoration:none}
.side a.nav.on{background:var(--surface);color:var(--ink);font-weight:550;
  box-shadow:var(--shadow);border:1px solid var(--line)}
.side .pill{margin-left:auto;background:var(--accent);color:#fff;font-size:10.5px;
  font-weight:600;padding:1px 7px;border-radius:10px}
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{height:60px;border-bottom:1px solid var(--line);display:flex;align-items:center;
  justify-content:space-between;padding:0 26px;gap:16px;background:var(--surface)}
.topbar h1{font-size:17px}
.content{padding:26px;flex:1;background:var(--bg-soft)}
@media(max-width:860px){
  .shell{flex-direction:column}
  .side{width:100%;flex-direction:row;overflow-x:auto;padding:10px;gap:6px;align-items:center}
  .side .sect,.side .side-brand{display:none}
  .content{padding:16px}
}

/* ---------- public site ---------- */
.nav-pub{border-bottom:1px solid var(--line);background:rgba(255,255,255,.9);
  backdrop-filter:blur(8px);position:sticky;top:0;z-index:20}
.nav-pub .inner{display:flex;align-items:center;justify-content:space-between;height:64px;gap:20px}
.nav-links{display:flex;gap:26px;align-items:center}
.nav-links a{color:var(--ink-2);font-size:14px;font-weight:450}
.nav-links a:hover{color:var(--ink);text-decoration:none}
@media(max-width:760px){.nav-links{display:none}}

.hero{padding:82px 0 68px;border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#f7faf8 0%,#fff 100%)}
.hero h1{font-size:47px;letter-spacing:-.035em;line-height:1.08;max-width:16ch}
.hero p.lead{font-size:18px;color:var(--ink-2);max-width:56ch;margin:20px 0 30px;line-height:1.6}
@media(max-width:760px){.hero{padding:52px 0 44px}.hero h1{font-size:33px}.hero p.lead{font-size:16px}}
.eyebrow{display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:550;
  color:var(--accent-dark);background:var(--accent-soft);border:1px solid #cfe4d7;
  padding:4px 11px;border-radius:20px;margin-bottom:20px}
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:20px}
.feature{padding:24px;border:1px solid var(--line);border-radius:12px;background:var(--surface)}
.feature h3{margin-bottom:8px}
.feature p{color:var(--muted);font-size:14px;margin:0;line-height:1.65}
.section{padding:70px 0}
.section-head{max-width:620px;margin-bottom:36px}
.section-head p{color:var(--muted);font-size:16px;margin-top:10px}
.footer{border-top:1px solid var(--line);padding:38px 0;background:var(--bg-soft);
  font-size:13.5px;color:var(--muted)}
.footer a{color:var(--ink-2)}

/* ---------- code blocks / docs ---------- */
pre.code{background:#0f1410;color:#dfe6dc;border-radius:10px;padding:18px 20px;overflow-x:auto;
  font-size:13px;line-height:1.65;margin:0 0 18px}
pre.code .c{color:#7d8f7b}
pre.code .s{color:#a8d9a0}
pre.code .k{color:#9cc6e8}
code.inline{background:var(--bg-soft);border:1px solid var(--line);border-radius:4px;
  padding:1.5px 6px;font-size:12.5px;color:var(--ink-2)}
.docs{display:grid;grid-template-columns:216px 1fr;gap:44px;align-items:start}
@media(max-width:900px){.docs{grid-template-columns:1fr}}
.docs-nav{position:sticky;top:82px;font-size:14px}
.docs-nav a{display:block;padding:5px 0;color:var(--muted)}
.docs-nav a:hover{color:var(--accent)}
.docs-nav .g{font-weight:600;color:var(--ink);margin-top:16px;font-size:12px;
  text-transform:uppercase;letter-spacing:.05em}
.docs-body h2{margin:44px 0 14px;padding-top:8px}
.docs-body h2:first-child{margin-top:0}
.docs-body h3{margin:28px 0 10px}
.docs-body p,.docs-body li{color:var(--ink-2);font-size:14.5px}
.docs-body .tbl{margin-bottom:20px}

/* ---------- checkout ---------- */
.checkout{min-height:100vh;display:flex;align-items:center;justify-content:center;
  padding:28px 18px;background:var(--bg-soft)}
.checkout-box{width:100%;max-width:420px}
.pay-amount{font-size:34px;font-weight:650;letter-spacing:-.035em;font-variant-numeric:tabular-nums}
.method{display:flex;align-items:center;gap:13px;padding:14px 16px;border:1.5px solid var(--line-strong);
  border-radius:10px;cursor:pointer;margin-bottom:11px;transition:.14s;background:#fff}
.method:hover{border-color:var(--muted)}
.method.on{border-color:var(--accent);background:var(--accent-soft)}
.method input{display:none}
.method .logo{width:40px;height:40px;border-radius:8px;display:grid;place-items:center;
  font-weight:700;font-size:11px;color:#fff;flex-shrink:0;letter-spacing:-.02em}
.method .nm{font-weight:550;font-size:14.5px}
.method .ds{font-size:12.5px;color:var(--muted)}
.method .tick{margin-left:auto;width:18px;height:18px;border-radius:50%;
  border:1.5px solid var(--line-strong)}
.method.on .tick{border-color:var(--accent);background:var(--accent);
  box-shadow:inset 0 0 0 3px #fff}

/* ---------- auth pages ---------- */
.auth{min-height:100vh;display:flex;align-items:center;justify-content:center;
  padding:28px 18px;background:var(--bg-soft)}
.auth-box{width:100%;max-width:388px}
.auth-box .card-pad{padding:28px}

/* ---------- misc ---------- */
.key-box{display:flex;align-items:center;gap:10px;background:var(--bg-soft);
  border:1px solid var(--line);border-radius:var(--radius);padding:9px 12px;font-family:var(--mono);
  font-size:12.5px;word-break:break-all}
.key-box .btn{margin-left:auto;flex-shrink:0}
.filters{display:flex;gap:10px;flex-wrap:wrap;align-items:flex-end;margin-bottom:18px}
.filters .field{margin:0;min-width:150px}
.pager{display:flex;gap:6px;align-items:center;justify-content:flex-end;padding:14px 22px;
  border-top:1px solid var(--line);font-size:13.5px}
.pager a,.pager span{padding:5px 10px;border-radius:6px;border:1px solid var(--line)}
.pager .on{background:var(--accent);border-color:var(--accent);color:#fff}