:root {
  --bg: #f5f6f8;
  --card: #fff;
  --text: #1b1f24;
  --muted: #667085;
  --border: #d8dce2;
  --accent: #1d4ed8;
  --err-bg: #fdecec;
  --err: #b42318;
  --add: #0f766e;
  --wa: #15803d;
  --neutral: #475467;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}
main { max-width: 520px; margin: 0 auto; padding: 16px; }
h1 { font-size: 1.35rem; margin: 0 0 16px; }
h2 { font-size: 1.05rem; margin: 0; }
.muted { color: var(--muted); }
[hidden] { display: none !important; }

/* Step indicator */
.steps { display: flex; gap: 8px; margin: 4px 0 20px; padding: 0; list-style: none; font-size: .85rem; color: var(--muted); }
.steps li { flex: 1; border-top: 3px solid var(--border); padding-top: 6px; }
.steps li.done, .steps li.current { border-color: var(--accent); color: var(--text); }
.steps li.current { font-weight: 600; }

/* Cards and forms */
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; display: grid; gap: 14px; }
label { display: grid; gap: 4px; font-size: .9rem; font-weight: 600; }
.opt { font-weight: 400; color: var(--muted); }
input, select, textarea {
  font: inherit; /* 16px keeps iOS from zooming on focus */
  width: 100%; padding: 11px 12px; border: 1px solid var(--border); border-radius: 8px; background: #fff; color: var(--text);
}
input:focus, select:focus, textarea:focus { outline: 2px solid var(--accent); outline-offset: -1px; }
textarea { resize: vertical; min-height: 80px; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.prefix { display: flex; }
.prefix span { padding: 11px 10px; border: 1px solid var(--border); border-right: 0; border-radius: 8px 0 0 8px; background: var(--bg); font-weight: 400; }
.prefix input { border-radius: 0 8px 8px 0; }

button, .btn {
  font: inherit; font-weight: 600; padding: 13px; border: 0; border-radius: 8px; cursor: pointer;
  background: var(--accent); color: #fff; text-align: center; text-decoration: none; display: block; width: 100%;
}
button:disabled, .btn.disabled { opacity: .55; cursor: not-allowed; pointer-events: none; }
.btn.add { background: var(--add); }
.btn.wa { background: var(--wa); }
.btn.restart { background: var(--neutral); }
.btn.ghost { background: transparent; color: var(--accent); border: 1px solid var(--accent); }
.link { color: var(--accent); font-weight: 600; text-decoration: none; }
button.link { background: none; border: 0; padding: 0; width: auto; font-size: .9rem; }
button.link.danger { color: var(--err); }
.stack { display: grid; gap: 12px; }
.btn-row { display: grid; grid-auto-flow: column; grid-auto-columns: 1fr; gap: 10px; }

/* Uploaded receipt cards */
.head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; }
.rbody { display: grid; grid-template-columns: 64px 1fr; gap: 12px; align-items: start; }
.thumb { width: 64px; height: 64px; border-radius: 8px; object-fit: cover; background: var(--bg); border: 1px solid var(--border); display: grid; place-items: center; font-size: .75rem; color: var(--muted); }
.rbody .summary { gap: 4px; font-size: .95rem; }
.rnotes { margin: 0; font-size: .85rem; color: var(--muted); grid-column: 1 / -1; white-space: pre-wrap; }
.summary .grand { border-top: 1px solid var(--border); padding-top: 10px; font-size: 1.1rem; }
.summary .grand dt { color: var(--text); font-weight: 600; }
.totals { display: flex; justify-content: space-between; font-weight: 600; padding: 0 4px; }

/* WhatsApp message preview */
.message { margin: 0; padding: 12px; background: var(--bg); border-radius: 8px; white-space: pre-wrap; font: inherit; font-size: .95rem; }

.msg { padding: 12px; border-radius: 8px; font-size: .95rem; }
.msg.ok { background: #e7f6ec; color: #146c2e; }
.msg.err { background: var(--err-bg); color: var(--err); }
.msg.info { background: #eef2ff; color: #3730a3; }

/* Photo picker */
.drop {
  display: grid; place-items: center; gap: 4px; text-align: center; min-height: 140px; padding: 16px;
  border: 2px dashed var(--border); border-radius: 12px; cursor: pointer; font-weight: 600;
}
.drop input { position: absolute; width: 1px; height: 1px; opacity: 0; }
.drop:focus-within { border-color: var(--accent); }
.drop img { max-width: 100%; max-height: 260px; border-radius: 8px; }
.drop .muted { font-weight: 400; font-size: .85rem; }

/* Summary list */
.summary { display: grid; gap: 10px; margin: 0; }
.summary div { display: flex; justify-content: space-between; gap: 16px; }
.summary dt { color: var(--muted); }
.summary dd { margin: 0; text-align: right; font-weight: 600; }