:root {
  --bg: #f4f6fa; --card: #fff; --ink: #172033; --muted: #667085; --line: #e4e7ec;
  --accent: #1553d6; --accent-ink: #fff; --ok: #0e7a43; --ok-bg: #e6f6ed;
  --warn: #8a4b00; --warn-bg: #fff4e5; --err: #b42318; --err-bg: #fdecea; --info-bg: #eaf1fe;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; }
h1 { font-size: 24px; margin: 8px 0 12px; }
h2 { font-size: 18px; margin: 0 0 12px; }
a { color: var(--accent); }
code, .mono { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 13px; }
.muted { color: var(--muted); }
.wrap { max-width: 1040px; margin: 0 auto; padding: 16px; }

.top { background: var(--card); border-bottom: 1px solid var(--line); }
.top-in { max-width: 1040px; margin: 0 auto; padding: 12px 16px; display: flex; align-items: center; justify-content: space-between; gap: 12px; flex-wrap: wrap; }
.top nav { display: flex; gap: 16px; align-items: center; }
.top nav a { text-decoration: none; color: var(--ink); }
.inline { display: inline; margin: 0; }
.linkbtn { background: none; border: 0; color: var(--err); padding: 0; font: inherit; cursor: pointer; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px; margin: 16px 0; }
.card.narrow { max-width: 440px; }
.center { text-align: center; margin-left: auto; margin-right: auto; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
@media (max-width: 720px) { .grid2 { grid-template-columns: 1fr; } }

.stack { display: grid; gap: 12px; }
label { display: grid; gap: 4px; font-size: 14px; color: var(--muted); }
label.check { display: flex; align-items: center; gap: 8px; color: var(--ink); }
input, select, textarea { font: inherit; color: var(--ink); background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; width: 100%; }
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: 0; border-color: transparent; }
label.check input { width: auto; }
button, .btn { font: inherit; font-weight: 600; border: 0; border-radius: 10px; padding: 10px 16px; background: var(--accent); color: var(--accent-ink); cursor: pointer; text-decoration: none; display: inline-block; }
button.ghost { background: transparent; color: var(--ink); border: 1px solid var(--line); }
button.ok { background: var(--ok); }
button.small { padding: 6px 10px; font-size: 13px; }

.flash { padding: 10px 14px; border-radius: 10px; margin: 12px 0; background: var(--ok-bg); color: var(--ok); }
.flash.err { background: var(--err-bg); color: var(--err); }
.flash.warn { background: var(--warn-bg); color: var(--warn); }
.flash.info { background: var(--info-bg); color: var(--ink); }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 12px; margin: 12px 0; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 14px; display: grid; }
.stat span, .stat small { color: var(--muted); font-size: 13px; }
.stat b { font-size: 22px; }

.filters { display: flex; flex-wrap: wrap; gap: 10px; align-items: flex-end; margin: 12px 0; }
.filters label { min-width: 140px; flex: 1; }
.table-wrap { overflow-x: auto; background: var(--card); border: 1px solid var(--line); border-radius: 14px; }
table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { font-size: 13px; color: var(--muted); font-weight: 600; }
tr:last-child td { border-bottom: 0; }
td.actions form { margin-right: 6px; }
.badge { font-size: 12px; font-weight: 600; padding: 3px 8px; border-radius: 999px; background: var(--warn-bg); color: var(--warn); }
.badge.received { background: var(--ok-bg); color: var(--ok); }
.badge.not_received { background: var(--err-bg); color: var(--err); }
.copyrow { display: flex; gap: 8px; margin: 8px 0; }
.copyrow input { font-family: ui-monospace, Menlo, Consolas, monospace; font-size: 13px; }
details summary { cursor: pointer; font-weight: 600; }

/* Payment page */
.pay { max-width: 420px; margin: 0 auto; background: var(--card); border: 1px solid var(--line); border-radius: 20px; padding: 22px 16px; }
.pay-head { text-align: center; }
.pay-head h1 { margin: 10px 0 2px; }
.pay-head p { margin: 0; word-break: break-all; }
.avatar { width: 56px; height: 56px; border-radius: 50%; margin: 0 auto; background: var(--info-bg); color: var(--accent); font-size: 24px; font-weight: 700; display: flex; align-items: center; justify-content: center; }
.amount { margin: 20px 0 8px; }
.amount input { font-size: 28px; font-weight: 700; text-align: center; padding: 12px; }
.choose { font-weight: 600; margin: 16px 0 4px; }
.apps { display: grid; }
.app { display: flex; align-items: center; gap: 12px; width: 100%; min-height: 56px; padding: 8px 4px; background: none; border: 0; border-top: 1px solid var(--line); border-radius: 0; color: var(--ink); font-weight: 500; text-align: left; }
.app[hidden] { display: none; }
.dot { width: 38px; height: 38px; flex: none; border-radius: 50%; background: var(--info-bg); color: var(--accent); display: flex; align-items: center; justify-content: center; font-weight: 700; }
.msg { padding: 10px 12px; border-radius: 10px; margin: 10px 0; background: var(--info-bg); font-size: 14px; }
.msg[hidden] { display: none; }
.msg.err { background: var(--err-bg); color: var(--err); }
.msg.warn { background: var(--warn-bg); color: var(--warn); }
.msg.ok { background: var(--ok-bg); color: var(--ok); }
.fine { color: var(--muted); font-size: 13px; text-align: center; margin: 14px 0 0; }
.upibox { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 6px; flex-wrap: wrap; }
.upibox .mono { font-size: 15px; word-break: break-all; }
.steps { margin: 12px 0 4px; padding: 12px 12px 12px 32px; background: var(--info-bg); border-radius: 12px; font-size: 14px; }
.steps li + li { margin-top: 4px; }