:root{
  --bg:#f4f6fb; --card:#ffffff; --text:#0f172a; --muted:#64748b; --line:#e5e9f2;
  --brand:#26a17b; --brand-dark:#1d8466; --brand-soft:#e7f6f0;
  --red:#e5484d; --red-soft:#fdecec; --amber:#b7791f; --amber-soft:#fff7e6;
  --radius:18px; --shadow:0 10px 40px rgba(15,23,42,.08);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;background:var(--bg);color:var(--text);
  min-height:100vh;display:flex;align-items:center;justify-content:center;padding:24px 16px;
  background-image:radial-gradient(circle at 15% 0%,#dff3ec 0,transparent 40%),radial-gradient(circle at 100% 100%,#e6ecff 0,transparent 40%)}
.wrap{width:100%;max-width:440px}
.brand{display:flex;align-items:center;gap:10px;justify-content:center;margin-bottom:20px;font-weight:700;font-size:18px}
.logo{width:34px;height:34px;border-radius:10px;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:800}
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:28px;border:1px solid var(--line)}
h1{font-size:22px;font-weight:700;margin-bottom:6px}
.sub{color:var(--muted);font-size:14px;margin-bottom:22px}
label{font-size:13px;font-weight:600;color:var(--muted);display:block;margin-bottom:8px}
.input-wrap{position:relative}
.input-wrap input{width:100%;padding:16px 80px 16px 16px;font-size:22px;font-weight:700;border:1.5px solid var(--line);
  border-radius:14px;outline:none;transition:.2s;font-family:inherit}
.input-wrap input:focus{border-color:var(--brand);box-shadow:0 0 0 4px var(--brand-soft)}
.input-wrap .unit{position:absolute;right:16px;top:50%;transform:translateY(-50%);font-weight:700;color:var(--brand)}
.chips{display:flex;gap:8px;margin:14px 0 22px;flex-wrap:wrap}
.chip{border:1px solid var(--line);background:#fff;padding:8px 14px;border-radius:999px;font-weight:600;font-size:13px;cursor:pointer;transition:.2s}
.chip:hover{border-color:var(--brand);color:var(--brand)}
.btn{width:100%;padding:16px;border:none;border-radius:14px;background:var(--brand);color:#fff;font-size:16px;font-weight:700;
  cursor:pointer;transition:.2s;font-family:inherit;display:inline-flex;justify-content:center;align-items:center;gap:8px;text-decoration:none}
.btn:hover{background:var(--brand-dark)}
.btn.ghost{background:#fff;color:var(--text);border:1.5px solid var(--line)}
.btn.ghost:hover{border-color:var(--text)}
.err{background:var(--red-soft);color:var(--red);padding:12px 14px;border-radius:12px;font-size:14px;margin-bottom:16px;font-weight:500}
.foot{text-align:center;color:var(--muted);font-size:12px;margin-top:18px}

/* pay page */
.amount-box{text-align:center;padding:4px 0 18px;border-bottom:1px dashed var(--line);margin-bottom:20px}
.amount-box .lbl{font-size:13px;color:var(--muted);font-weight:600}
.amount-box .val{font-size:34px;font-weight:800;margin:4px 0;display:flex;align-items:center;justify-content:center;gap:8px}
.amount-box .val small{font-size:16px;color:var(--brand)}
.qr{width:212px;height:212px;margin:0 auto 18px;padding:14px;border:1px solid var(--line);border-radius:16px;background:#fff;position:relative}
.qr canvas,.qr img{width:100%!important;height:100%!important}
.field{background:#f8fafc;border:1px solid var(--line);border-radius:12px;padding:12px 14px;margin-bottom:12px}
.field .k{font-size:12px;color:var(--muted);font-weight:600;margin-bottom:4px}
.field .row{display:flex;align-items:center;justify-content:space-between;gap:10px}
.field .v{font-weight:600;font-size:14px;word-break:break-all}
.copy{flex-shrink:0;border:1px solid var(--line);background:#fff;border-radius:8px;padding:6px 10px;font-size:12px;font-weight:600;cursor:pointer;font-family:inherit}
.copy.done{background:var(--brand);color:#fff;border-color:var(--brand)}
.badge{display:inline-flex;align-items:center;gap:6px;background:var(--brand-soft);color:var(--brand-dark);padding:4px 10px;border-radius:999px;font-size:12px;font-weight:700}
.warn{background:var(--amber-soft);color:var(--amber);font-size:13px;padding:12px 14px;border-radius:12px;margin:6px 0 16px;line-height:1.5}
.status{display:flex;align-items:center;gap:10px;justify-content:center;padding:14px;border-radius:12px;background:#f8fafc;font-weight:600;font-size:14px}
.dot{width:10px;height:10px;border-radius:50%;background:var(--brand);animation:pulse 1.4s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(38,161,123,.6)}70%{box-shadow:0 0 0 10px rgba(38,161,123,0)}100%{box-shadow:0 0 0 0 rgba(38,161,123,0)}}
.timer{text-align:center;color:var(--muted);font-size:13px;margin-top:12px}
.timer b{color:var(--text)}
.status.expired{background:var(--red-soft);color:var(--red)}
.status.expired .dot{background:var(--red);animation:none}

/* success */
.tick{width:84px;height:84px;border-radius:50%;background:var(--brand-soft);display:grid;place-items:center;margin:0 auto 18px}
.tick svg{width:44px;height:44px;stroke:var(--brand);stroke-width:3;fill:none;stroke-dasharray:60;stroke-dashoffset:60;animation:draw .6s .2s forwards}
@keyframes draw{to{stroke-dashoffset:0}}
.center{text-align:center}
.mt{margin-top:12px}