/* Client Invoice Portal */
:root {
  --ink: #1b2a4a;
  --paper: #f7f5f2;
  --accent: #c8532b;
  --muted: #5b6577;
  --card: #ffffff;
  --line: #e3ded7;
  --ok: #2e6b3f;
  --warn: #8a4b12;
}

* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Georgia, "Times New Roman", serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.5;
}

.site-header {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  background: var(--ink);
  color: var(--paper);
}
.site-header h1 { font-size: 1.25rem; margin: 0; }
.session-box { display: flex; align-items: center; gap: 0.75rem; font-size: 0.95rem; }
.session-box[hidden] { display: none; }

main { max-width: 880px; margin: 0 auto; padding: 1.5rem; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 1.5rem;
}
.login-card { max-width: 420px; margin: 2rem auto; }

h2 { margin-top: 0; font-size: 1.35rem; }

label { display: block; margin: 0.75rem 0 0.25rem; font-weight: bold; }
input {
  width: 100%;
  padding: 0.6rem;
  font: inherit;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--paper);
  color: var(--ink);
}

button {
  font: inherit;
  cursor: pointer;
  border-radius: 4px;
  padding: 0.55rem 1rem;
  border: 1px solid var(--ink);
}
button:focus-visible, input:focus-visible, a:focus-visible, td:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; margin-top: 1rem; }
.btn-primary:hover { background: #a84322; }
.btn-secondary { background: transparent; color: var(--ink); margin-bottom: 1rem; }

table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--line); }
th, td { text-align: left; padding: 0.75rem 1rem; border-bottom: 1px solid var(--line); }
th { background: var(--ink); color: var(--paper); }
tbody tr { cursor: pointer; }
tbody tr:hover { background: #efe9e2; }

.status { display: inline-block; padding: 0.15rem 0.6rem; border-radius: 999px; font-size: 0.85rem; font-weight: bold; }
.status-draft   { background: #e5e0d8; color: var(--ink); }
.status-sent    { background: #dce7f2; color: var(--ink); }
.status-paid    { background: #d9ecdd; color: var(--ok); }
.status-overdue { background: #f6e0d3; color: var(--warn); }

.error { color: #8f1d1d; font-weight: bold; }
.error[hidden] { display: none; }

dl { display: grid; grid-template-columns: max-content 1fr; gap: 0.5rem 1.25rem; margin: 0; }
dt { font-weight: bold; color: var(--muted); }
dd { margin: 0; }

.site-footer { text-align: center; color: var(--muted); padding: 1.5rem; font-size: 0.9rem; }
#empty-msg { color: var(--muted); }

@media (max-width: 600px) {
  main { padding: 1rem; }
  table, thead, tbody, tr, td, th { display: block; }
  thead { display: none; }
  tr { border-bottom: 2px solid var(--line); padding-bottom: 0.5rem; margin-bottom: 0.5rem; }
  td { border: none; padding: 0.25rem 0; }
  td::before { content: attr(data-label) ": "; font-weight: bold; color: var(--muted); }
}