:root {
  --bg: #f7f6f3;
  --panel: #ffffff;
  --ink: #1a1a18;
  --muted: #5c5a55;
  --line: #e4e2db;
  --accent: #0f5c4c;
  --accent-ink: #ffffff;
  --ok: #0f5c4c;
  --warn: #8a4b12;
  --radius: 14px;
  --font: "Avenir Next", "Segoe UI", "Helvetica Neue", sans-serif;
  color-scheme: light;
}

:root[data-theme="dark"] {
  --bg: #141413;
  --panel: #1e1e1c;
  --ink: #f3f1ea;
  --muted: #a8a59c;
  --line: #32312d;
  --accent: #3ecfad;
  --accent-ink: #0b1f1a;
  --ok: #3ecfad;
  --warn: #e0a15a;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.45;
}
body { min-height: 100%; }
.wrap {
  padding: 14px;
  max-width: 440px;
  margin: 0 auto;
}
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}
h1 {
  margin: 0 0 4px;
  font-size: 1.15rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}
.lead {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 0.9rem;
}
form {
  display: grid;
  gap: 10px;
}
label {
  display: grid;
  gap: 4px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.01em;
}
input, select, button {
  font: inherit;
  color: var(--ink);
}
input, select {
  width: 100%;
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  padding: 0 11px;
}
input:focus, select:focus, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.out {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}
.receipt {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}
.note {
  margin: 6px 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}
.note.warn { color: var(--warn); }
.credit {
  display: block;
  margin-top: 12px;
  text-align: center;
  color: var(--muted);
  font-size: 0.78rem;
  text-decoration: none;
}
.credit:hover { color: var(--accent); text-decoration: underline; }
.credit strong { font-weight: 650; color: var(--ink); }
.opt {
  font-weight: 500;
  color: var(--muted);
  opacity: 0.85;
}
.search-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 8px;
  align-items: end;
}
.search-form label { grid-column: 1 / -1; }
button.go {
  min-height: 40px;
  border: 0;
  border-radius: 10px;
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 650;
  padding: 0 14px;
  cursor: pointer;
}
button.go:hover { filter: brightness(1.05); }
@media (max-width: 360px) {
  .row, .search-form { grid-template-columns: 1fr; }
}