:root {
  --bg: #0b1220; --panel: #131c2e; --panel2: #1a2438; --border: #243049;
  --text: #e6edf7; --muted: #8da2c0; --accent: #4f8cff; --accent2: #7c5cff;
  --green: #2ec27e; --amber: #f5b14c; --red: #ff5d6c; --chip: #20304d;
}
* { box-sizing: border-box; }
body {
  margin: 0; background: radial-gradient(1200px 600px at 70% -10%, #16213a 0%, var(--bg) 55%) fixed;
  color: var(--text); font: 15px/1.5 -apple-system, Segoe UI, Roboto, Inter, system-ui, sans-serif;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { font-weight: 650; letter-spacing: -.01em; }
.wrap { max-width: 1180px; margin: 0 auto; padding: 22px; }
header.top { display: flex; align-items: center; gap: 14px; padding: 16px 22px; border-bottom: 1px solid var(--border); background: rgba(11,18,32,.7); backdrop-filter: blur(8px); position: sticky; top: 0; z-index: 5; }
header.top .logo { font-weight: 750; font-size: 18px; }
header.top .logo span { color: var(--accent); }
header.top .spacer { flex: 1; }
.badge-role { font-size: 12px; color: var(--muted); background: var(--chip); padding: 4px 10px; border-radius: 20px; border: 1px solid var(--border); }

.grid { display: grid; gap: 14px; }
.cards { grid-template-columns: repeat(auto-fit, minmax(190px, 1fr)); }
.card { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 16px 18px; }
.card.kpi .label { color: var(--muted); font-size: 13px; }
.card.kpi .val { font-size: 26px; font-weight: 700; margin-top: 6px; letter-spacing: -.02em; }
.card.kpi .val.green { color: var(--green); }
.card.kpi .val.amber { color: var(--amber); }
.card.kpi .sub { color: var(--muted); font-size: 12px; margin-top: 4px; }

.panel { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; padding: 18px; margin-top: 16px; }
.panel h2 { margin: 0 0 12px; font-size: 16px; }
.panel .hint { color: var(--muted); font-size: 13px; margin: -6px 0 12px; }

table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--border); white-space: nowrap; }
th { color: var(--muted); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
td.mono, .mono { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 12.5px; }
tbody tr:hover { background: var(--panel2); }
.scroll { overflow: auto; max-height: 420px; border-radius: 10px; }

.chip { display: inline-block; font-size: 11.5px; padding: 3px 9px; border-radius: 20px; border: 1px solid var(--border); background: var(--chip); color: var(--text); }
.chip.green { background: rgba(46,194,126,.14); color: #7ef0b6; border-color: rgba(46,194,126,.3); }
.chip.amber { background: rgba(245,177,76,.14); color: #ffd79a; border-color: rgba(245,177,76,.3); }
.chip.red { background: rgba(255,93,108,.14); color: #ffb3bb; border-color: rgba(255,93,108,.3); }
.chip.blue { background: rgba(79,140,255,.14); color: #bcd3ff; border-color: rgba(79,140,255,.3); }
.chip.grey { color: var(--muted); }

input, select, button, textarea { font: inherit; }
input, select, textarea {
  background: var(--panel2); border: 1px solid var(--border); color: var(--text);
  border-radius: 10px; padding: 9px 11px; width: 100%;
}
label { display: block; font-size: 12.5px; color: var(--muted); margin: 0 0 5px; }
.field { margin-bottom: 12px; }
.row { display: flex; gap: 12px; flex-wrap: wrap; }
.row > * { flex: 1; min-width: 130px; }
.row > button { flex: 0 0 auto; min-width: 0; }
button {
  background: linear-gradient(180deg, var(--accent), #3f78e8); color: #fff; border: 0;
  border-radius: 10px; padding: 10px 16px; cursor: pointer; font-weight: 600; width: auto;
}
button:hover { filter: brightness(1.08); }
button.ghost { background: transparent; border: 1px solid var(--border); color: var(--text); }
button.sm { padding: 6px 11px; font-size: 12.5px; }
button.danger { background: linear-gradient(180deg, #ff6b78, #e8455a); }
button:disabled { opacity: .5; cursor: not-allowed; }
.inline-actions { display: flex; gap: 6px; }

.tabs { display: flex; gap: 6px; flex-wrap: wrap; margin: 8px 0 4px; }
.tabs button { background: var(--panel); border: 1px solid var(--border); color: var(--muted); font-weight: 600; }
.tabs button.active { background: var(--panel2); color: var(--text); border-color: var(--accent); }

.login { max-width: 380px; margin: 8vh auto; }
.notice { padding: 10px 14px; border-radius: 10px; margin: 10px 0; font-size: 13.5px; }
.notice.err { background: rgba(255,93,108,.12); border: 1px solid rgba(255,93,108,.3); color: #ffb3bb; }
.notice.ok { background: rgba(46,194,126,.12); border: 1px solid rgba(46,194,126,.3); color: #7ef0b6; }
.muted { color: var(--muted); }
.qr { background: #fff; padding: 10px; border-radius: 12px; display: inline-block; }
.balance-banner { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.dot { width: 10px; height: 10px; border-radius: 50%; }
.dot.green { background: var(--green); box-shadow: 0 0 10px var(--green); }
.dot.red { background: var(--red); box-shadow: 0 0 10px var(--red); }
.copy { cursor: pointer; }

/* ── Polish ──────────────────────────────────────────────────────────────── */
.panel { box-shadow: 0 1px 0 rgba(255,255,255,.03) inset, 0 14px 40px -28px rgba(0,0,0,.7); }
.card { transition: transform .15s ease, border-color .15s ease; }

/* ── Landing: hero + role cards + flow ───────────────────────────────────── */
.hero { padding: 30px 4px 8px; }
.hero h1 { font-size: 36px; line-height: 1.08; margin: 0 0 12px; }
.hero .grad { background: linear-gradient(90deg, var(--accent), var(--accent2)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero .lead { color: var(--muted); max-width: 780px; font-size: 16px; line-height: 1.6; }

.roles { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 16px; margin: 20px 0; }
.role-card { display: block; text-decoration: none; color: var(--text); position: relative; overflow: hidden;
  background: linear-gradient(180deg, var(--panel2), var(--panel)); border: 1px solid var(--border);
  border-radius: 18px; padding: 20px; transition: transform .16s ease, border-color .16s ease, box-shadow .16s ease; }
.role-card::before { content: ''; position: absolute; left: 0; right: 0; top: 0; height: 4px; background: var(--rc, var(--accent)); }
.role-card:hover { transform: translateY(-3px); border-color: var(--rc, var(--accent)); box-shadow: 0 18px 44px -22px var(--rc, var(--accent)); text-decoration: none; }
.role-card .role-ic { font-size: 28px; width: 54px; height: 54px; display: flex; align-items: center; justify-content: center; border-radius: 15px; }
.role-card h3 { margin: 14px 0 6px; font-size: 18px; }
.role-card p { color: var(--muted); font-size: 13.5px; line-height: 1.55; margin: 0 0 14px; }
.role-card .role-meta { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.role-card .open { color: var(--rc, var(--accent)); font-weight: 650; font-size: 13.5px; white-space: nowrap; }
.role-card .role-demo { color: var(--muted); font-size: 11.5px; margin-top: 10px; font-family: ui-monospace, monospace; }
.role-card.admin    { --rc: #7c5cff; } .role-card.admin .role-ic    { background: rgba(124,92,255,.16); border: 1px solid rgba(124,92,255,.4); }
.role-card.merchant { --rc: #2ec27e; } .role-card.merchant .role-ic { background: rgba(46,194,126,.16); border: 1px solid rgba(46,194,126,.4); }
.role-card.trader   { --rc: #4f8cff; } .role-card.trader .role-ic   { background: rgba(79,140,255,.16); border: 1px solid rgba(79,140,255,.4); }
.role-card.client   { --rc: #f5b14c; } .role-card.client .role-ic   { background: rgba(245,177,76,.16); border: 1px solid rgba(245,177,76,.4); }

.flow { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 10px; margin: 6px 0; }
.flow .fnode { background: var(--panel2); border: 1px solid var(--border); border-radius: 12px; padding: 9px 13px; font-weight: 600; font-size: 14px; }
.flow .fnode.vault { background: linear-gradient(135deg, rgba(46,194,126,.16), rgba(124,92,255,.14)); border-color: rgba(46,194,126,.4); }
.flow .farr { color: var(--muted); font-size: 12.5px; }

/* ── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 760px) {
  .wrap { padding: 16px 13px; }
  header.top { flex-wrap: wrap; padding: 12px 14px; gap: 10px; }
  header.top .spacer { flex-basis: 100%; height: 0; }
  .hero { padding: 18px 2px 4px; }
  .hero h1 { font-size: 27px; }
  .hero .lead { font-size: 14.5px; }
  .panel { padding: 14px; }
  .row { flex-direction: column; gap: 10px; }
  .row > * { min-width: 0; width: 100%; }
  .tabs { flex-wrap: nowrap; overflow-x: auto; -webkit-overflow-scrolling: touch; padding-bottom: 6px; margin-right: -13px; }
  .tabs button { flex: 0 0 auto; }
  button { padding: 12px 16px; }
  button.sm { padding: 9px 12px; }
  .inline-actions { flex-wrap: wrap; }
  .scroll { max-height: none; }
  table { font-size: 13px; }
  th, td { padding: 9px 8px; }
}
@media (max-width: 460px) {
  .hero h1 { font-size: 23px; }
  .roles { grid-template-columns: 1fr; }
  .card.kpi .val { font-size: 22px; }
  .login { margin: 5vh auto; }
}