* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, sans-serif;
  background: #f7f7f8;
  color: #1a1a1a;
}
#app {
  max-width: 480px;
  margin: 0 auto;
  padding: 1rem;
}

/* Login card */
.card {
  background: #fff;
  border: 1px solid #e2e2e5;
  border-radius: 12px;
  padding: 1.5rem;
  text-align: center;
}
.card h1 {
  font-size: 1.25rem;
  margin: 0 0 1rem;
}
.card input {
  width: 100%;
  font-size: 1.1rem;
  padding: 0.6rem 0.75rem;
  border: 1px solid #ccc;
  border-radius: 8px;
  margin-bottom: 0.75rem;
}
.card button,
button {
  font-size: 1rem;
  padding: 0.6rem 1rem;
  border: none;
  border-radius: 8px;
  background: #e88005;
  color: #fff;
  cursor: pointer;
}
.card button:active,
button:active {
  opacity: 0.85;
}
.err {
  color: #c0392b;
  min-height: 1.2em;
  margin: 0.5rem 0 0;
  font-size: 0.9rem;
}

/* Tabs */
.tabs {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1rem;
}
.tabs button {
  flex: 1;
  background: #eee;
  color: #333;
}
.tabs button:hover {
  background: #e0e0e0;
}

/* Reset screen */
#reset-all {
  width: 100%;
  margin-bottom: 1rem;
  background: #c0392b;
}
.machine {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: #fff;
  border: 1px solid #e2e2e5;
  border-radius: 8px;
  padding: 0.6rem 0.9rem;
  margin-bottom: 0.5rem;
}
.machine.busy {
  border-color: #e88005;
  background: #fff6ec;
}
.machine .idle {
  color: #2a9d5c;
  font-size: 0.9rem;
}

/* Voucher screen */
.values {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.6rem;
  margin-bottom: 1rem;
}
.values button {
  padding: 0.9rem;
  font-size: 1.1rem;
}
#qr {
  text-align: center;
}
#qr img {
  display: block;
  margin: 0 auto;
  max-width: 100%;
}
#qr .num {
  margin-top: 0.5rem;
  font-weight: 600;
  word-break: break-all;
}