/* Mobile first. Class based rules only, no inline overrides. */
:root {
  --ink: #16202b;
  --muted: #5d6b7a;
  --line: #dfe5ec;
  --paper: #ffffff;
  --wash: #f5f7fa;
  --brand: #1f6f4a;
  --warn: #9a5b00;
  --stop: #8a1f2d;
}

body {
  margin: 0;
  background: var(--wash);
  color: var(--ink);
  font: 16px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.wrap {
  max-width: 46rem;
  margin: 0 auto;
  padding: 1rem;
}

.brand {
  margin: 0 0 .25rem;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--brand);
}

h1 { font-size: 1.5rem; line-height: 1.25; margin: 0 0 .5rem; }
h2 { font-size: 1.1rem; margin: 0 0 .5rem; }

.lede { color: var(--muted); margin: 0 0 1rem; }

.invoices { list-style: none; margin: 0 0 1rem; padding: 0; }

.invoice { margin-bottom: .5rem; }

.invoice-btn {
  width: 100%;
  text-align: left;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: .6rem;
  padding: .75rem .85rem;
  font: inherit;
  color: inherit;
  display: block;
}

.invoice.selected .invoice-btn {
  border-color: var(--brand);
  box-shadow: 0 0 0 2px rgba(31, 111, 74, .15);
}

.row1, .row2 {
  display: flex;
  justify-content: space-between;
  gap: .75rem;
}

.who { font-weight: 600; }
.amount { font-variant-numeric: tabular-nums; }
.row2 { color: var(--muted); font-size: .9rem; }

.state {
  display: inline-block;
  margin-top: .5rem;
  font-size: .8rem;
  padding: .15rem .5rem;
  border-radius: 999px;
  background: #e8eef4;
  color: var(--muted);
}

.state-chasing { background: #e7f2ec; color: var(--brand); }
.state-paid { background: #eef0f3; color: var(--muted); }
.state-paused { background: #fdf0e3; color: var(--warn); }
.state-final { background: #fbe9ec; color: var(--stop); }

.panel {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: .6rem;
  padding: 1rem;
  margin-bottom: 1rem;
}

.meta { color: var(--muted); font-size: .93rem; }

.timeline { list-style: none; margin: 0; padding: 0; }

.step {
  border-left: 3px solid var(--line);
  padding: 0 0 .75rem .85rem;
  margin-bottom: .25rem;
}

.step-now { border-left-color: var(--brand); }

.step-day {
  margin: 0;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted);
}

.step-what { margin: .15rem 0 .5rem; font-weight: 600; }

.message {
  margin: 0;
  background: var(--wash);
  border: 1px solid var(--line);
  border-radius: .5rem;
  padding: .7rem .8rem;
}

.message p { margin: 0 0 .4rem; font-size: .95rem; }
.message p:last-child { margin-bottom: 0; }
.subject { font-weight: 600; }

.next { margin: .5rem 0 0; font-weight: 600; color: var(--brand); }

.rules, .cta {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: .6rem;
  padding: 1rem;
  margin-bottom: 1rem;
}

.rules ul { margin: 0; padding-left: 1.1rem; }
.rules li { margin-bottom: .45rem; }

.go {
  display: inline-block;
  margin-top: .25rem;
  background: var(--brand);
  color: #fff;
  text-decoration: none;
  padding: .55rem .9rem;
  border-radius: .5rem;
  font-weight: 600;
}

footer { padding-top: 0; padding-bottom: 2rem; color: var(--muted); font-size: .9rem; }
footer a, .cta a { color: inherit; }

@media (min-width: 40rem) {
  h1 { font-size: 2rem; }
  .wrap { padding: 1.5rem; }
  .panel, .rules, .cta { padding: 1.25rem; }
}