:root {
  --bg: #f6f7f9;
  --panel: #ffffff;
  --ink: #16202b;
  --muted: #667485;
  --line: #e2e6ec;
  --accent: #128c7e;       /* WhatsApp green, muted */
  --accent-ink: #0b5c53;
  --danger: #b3261e;
  --ok-bg: #e8f5f1;
  --err-bg: #fdecea;
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12161b; --panel: #1a2027; --ink: #e7ecf2; --muted: #93a1b1;
    --line: #2a323b; --accent: #25d366; --accent-ink: #7ff0ab;
    --ok-bg: #143026; --err-bg: #3a1c1a;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 15px/1.55 -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}
.wrap { max-width: 940px; margin: 0 auto; padding: 0 20px; }
.topbar { background: var(--panel); border-bottom: 1px solid var(--line); margin-bottom: 26px; }
.topbar .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 58px; flex-wrap: wrap; }
.brand { font-weight: 700; text-decoration: none; color: var(--ink); font-size: 16px; }
.brand span { color: var(--muted); font-weight: 500; }
nav { display: flex; gap: 4px; flex-wrap: wrap; }
nav a {
  text-decoration: none; color: var(--muted); padding: 6px 11px;
  border-radius: 7px; font-size: 14px;
}
nav a:hover { background: var(--bg); color: var(--ink); }
nav a.on { background: var(--accent); color: #fff; }

h1 { font-size: 23px; margin: 0 0 4px; }
h2 { font-size: 17px; margin: 26px 0 10px; }
.sub { color: var(--muted); margin: 0 0 20px; }

.card {
  background: var(--panel); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px; margin-bottom: 16px;
}
.card h3 { margin: 0 0 12px; font-size: 15px; }

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .05em; color: var(--muted); font-weight: 600; }
tr:last-child td { border-bottom: 0; }

label { display: block; font-size: 13px; color: var(--muted); margin: 12px 0 4px; font-weight: 600; }
input[type=text], input[type=password], select, textarea {
  width: 100%; padding: 9px 11px; border: 1px solid var(--line);
  border-radius: 8px; background: var(--bg); color: var(--ink); font-size: 14px;
  font-family: inherit;
}
textarea { min-height: 80px; }
.row { display: flex; gap: 14px; flex-wrap: wrap; }
.row > div { flex: 1 1 220px; }

button, .btn {
  display: inline-block; border: 0; border-radius: 8px; padding: 9px 16px;
  background: var(--accent); color: #fff; font-size: 14px; font-weight: 600;
  cursor: pointer; text-decoration: none; margin-top: 14px;
}
button:hover, .btn:hover { filter: brightness(1.08); }
button.ghost, .btn.ghost { background: transparent; color: var(--muted); border: 1px solid var(--line); }
button.danger { background: var(--danger); }
button.sm, .btn.sm { padding: 5px 10px; font-size: 13px; margin-top: 0; }

.flash { padding: 11px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.flash.ok { background: var(--ok-bg); }
.flash.error { background: var(--err-bg); }

code, pre { font-family: "SF Mono", Consolas, "Liberation Mono", monospace; font-size: 13px; }
pre {
  background: var(--bg); border: 1px solid var(--line); border-radius: 8px;
  padding: 12px 14px; overflow-x: auto; margin: 8px 0;
}
code.inline { background: var(--bg); padding: 2px 6px; border-radius: 5px; border: 1px solid var(--line); }

.pill { display: inline-block; font-size: 12px; padding: 2px 9px; border-radius: 20px; background: var(--bg); border: 1px solid var(--line); color: var(--muted); }
.pill.good { background: var(--ok-bg); color: var(--accent-ink); border-color: transparent; }
.pill.bad { background: var(--err-bg); color: var(--danger); border-color: transparent; }
.muted { color: var(--muted); }
.small { font-size: 13px; }
.foot { color: var(--muted); font-size: 12px; padding: 30px 20px; }
.foot a { color: var(--muted); }

ol.steps { padding-left: 20px; margin: 0; }
ol.steps li { margin-bottom: 9px; }

.qrbox {
  display: flex; gap: 26px; align-items: flex-start; flex-wrap: wrap;
}
.qrframe {
  width: 260px; height: 260px; background: #fff; border-radius: 12px;
  border: 1px solid var(--line); display: flex; align-items: center;
  justify-content: center; padding: 12px; flex: 0 0 auto;
}
.qrframe img { width: 100%; height: 100%; }
.center { text-align: center; }
.login { max-width: 340px; margin: 12vh auto; }