:root {
  --bg: #0f1220;
  --panel: #171a2b;
  --panel-2: #1f2338;
  --text: #e7e9f3;
  --muted: #9aa0bd;
  --accent: #6ea8fe;
  --accent-2: #7ee787;
  --warn: #f0b429;
  --danger: #ff8a9c;
  --border: #2a2f4a;
  --code-bg: #0b0e1a;
  --radius: 12px;
  font-size: 15px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.5;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { margin: 0; }
.muted { color: var(--muted); }
.hidden { display: none !important; }

/* -- top bar -- */
.topbar {
  display: flex; align-items: center; gap: 16px;
  padding: 14px 24px;
  background: var(--panel);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 10;
}
.topbar .brand { font-weight: 700; font-size: 1.1rem; }
.topbar .brand span { color: var(--accent); }
.topbar .spacer { flex: 1; }
.topbar .persona {
  display: flex; align-items: center; gap: 10px;
  font-size: 0.85rem;
}
.badge {
  display: inline-block; padding: 3px 10px; border-radius: 999px;
  font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: .05em;
}
.badge.rider { background: #16294d; color: var(--accent); }
.badge.driver { background: #163a2b; color: var(--accent-2); }

/* -- login -- */
.login-wrap { display: flex; align-items: center; justify-content: center; min-height: 100vh; padding: 24px; }
.login-card {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 32px; width: 100%; max-width: 420px;
}
.login-card h1 { font-size: 1.5rem; margin-bottom: 4px; }
.login-card h1 span { color: var(--accent); }
.login-card .sub { color: var(--muted); margin-bottom: 22px; font-size: 0.9rem; }
.role-toggle { display: flex; gap: 10px; margin-bottom: 18px; }
.role-toggle button {
  flex: 1; padding: 14px; border-radius: 10px; cursor: pointer;
  background: var(--panel-2); border: 1px solid var(--border); color: var(--text);
  font-size: 0.95rem; font-weight: 600;
}
.role-toggle button.active.rider { background: var(--accent); color: #08122b; border-color: var(--accent); }
.role-toggle button.active.driver { background: var(--accent-2); color: #08122b; border-color: var(--accent-2); }

/* -- layout -- */
.workspace { display: grid; grid-template-columns: 340px 1fr; gap: 0; min-height: calc(100vh - 57px); }
.controls { background: var(--panel); border-right: 1px solid var(--border); padding: 20px; overflow-y: auto; }
.results { padding: 24px 28px; overflow-y: auto; }

/* -- form controls -- */
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 0.8rem; color: var(--muted); margin-bottom: 5px; }
.field .val { float: right; color: var(--accent); font-variant-numeric: tabular-nums; }
input[type="text"], input[type="number"], select {
  width: 100%; padding: 8px 10px; border-radius: 8px;
  background: var(--code-bg); border: 1px solid var(--border); color: var(--text);
  font-size: 0.9rem;
}
input[type="range"] { width: 100%; accent-color: var(--accent); }
.checks { display: flex; flex-wrap: wrap; gap: 12px; }
.checks label { display: flex; align-items: center; gap: 6px; color: var(--text); font-size: 0.85rem; cursor: pointer; }
.section-title {
  font-size: 0.72rem; text-transform: uppercase; letter-spacing: .08em;
  color: var(--muted); margin: 22px 0 10px; padding-bottom: 6px; border-bottom: 1px solid var(--border);
}
.section-title:first-child { margin-top: 0; }
.btn {
  padding: 9px 14px; border-radius: 8px; cursor: pointer; font-weight: 600; font-size: 0.85rem;
  background: var(--accent); color: #08122b; border: none;
}
.btn.ghost { background: var(--panel-2); color: var(--text); border: 1px solid var(--border); }

/* -- results -- */
.card { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 20px; margin-bottom: 18px; }
.card h2 { font-size: 1.05rem; margin-bottom: 12px; }
.card h3 { font-size: 0.95rem; color: var(--accent-2); margin: 4px 0 10px; }

.totals { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; }
.stat { background: var(--panel-2); border: 1px solid var(--border); border-radius: 10px; padding: 14px; }
.stat .k { font-size: 0.72rem; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
.stat .v { font-size: 1.5rem; font-weight: 700; font-variant-numeric: tabular-nums; margin-top: 4px; }
.stat .v.pos { color: var(--accent-2); }
.stat .v.neg { color: var(--danger); }
.stat .v.accent { color: var(--accent); }

table { border-collapse: collapse; width: 100%; font-size: 0.85rem; }
th, td { border-bottom: 1px solid var(--border); padding: 7px 9px; text-align: left; }
th { color: var(--muted); font-weight: 600; font-size: 0.75rem; text-transform: uppercase; letter-spacing: .04em; }
td.num, th.num { text-align: right; font-variant-numeric: tabular-nums; }
tr.total-row td { font-weight: 700; border-top: 2px solid var(--border); }
.amt-neg { color: var(--danger); }

/* buckets bars */
.bar-row { display: grid; grid-template-columns: 130px 1fr 90px; align-items: center; gap: 10px; margin-bottom: 7px; font-size: 0.82rem; }
.bar-track { background: var(--code-bg); border-radius: 6px; height: 18px; overflow: hidden; border: 1px solid var(--border); }
.bar-fill { height: 100%; border-radius: 6px; }
.bar-row .num { text-align: right; font-variant-numeric: tabular-nums; }

/* calc steps */
.step { border: 1px solid var(--border); border-radius: 8px; margin-bottom: 8px; overflow: hidden; }
.step .head { display: flex; align-items: center; gap: 10px; padding: 8px 12px; background: var(--panel-2); font-size: 0.82rem; }
.step .op { font-family: monospace; color: var(--accent); }
.step .seq { color: var(--muted); font-family: monospace; font-size: 0.75rem; }
.step .bucket-tag { margin-left: auto; font-size: 0.72rem; color: var(--muted); }
.step .detail { padding: 8px 12px; font-size: 0.82rem; color: var(--muted); }
.step .contrib { float: right; font-variant-numeric: tabular-nums; color: var(--text); }
.step .contrib.neg { color: var(--danger); }

/* offers */
.offer { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; margin-bottom: 8px; }
.offer .code { font-weight: 700; color: var(--accent); }
.offer .save { margin-left: auto; color: var(--accent-2); font-weight: 700; }
.tag { font-size: 0.7rem; padding: 2px 7px; border-radius: 999px; background: var(--panel-2); color: var(--muted); }
.validate-ok { color: var(--accent-2); }
.validate-bad { color: var(--danger); }

/* activity log */
.log-entry { border: 1px solid var(--border); border-radius: 8px; margin-bottom: 8px; overflow: hidden; }
.log-entry summary { cursor: pointer; padding: 8px 12px; background: var(--panel-2); font-family: monospace; font-size: 0.8rem; display: flex; gap: 8px; align-items: center; }
.log-entry pre { margin: 0; padding: 12px; background: var(--code-bg); font-size: 0.75rem; overflow-x: auto; color: #d7e0ff; }
.status-ok { color: var(--accent-2); }
.status-err { color: var(--danger); }
.pill { display: inline-block; padding: 1px 8px; border-radius: 999px; font-size: 0.68rem; font-weight: 700; }
.pill.post { background: #16294d; color: var(--accent); }
.pill.get { background: #163a2b; color: var(--accent-2); }

.error-banner { background: #3a1620; border: 1px solid var(--danger); color: var(--danger); padding: 10px 14px; border-radius: 8px; margin-bottom: 16px; font-size: 0.85rem; }