body {
  margin: 0;
  font-family: Inter, system-ui, sans-serif;
  background-color: #0b1020;
  color: #e6eef8;
}
.container {
  padding: 20px;
  max-width: 900px;
  margin: auto;
}
header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 20px;
}
input, button {
  padding: 8px 10px;
  border-radius: 8px;
  border: none;
  outline: none;
}
button {
  background-color: #0070f3;
  color: white;
  cursor: pointer;
}
.info {
  background: #121a2f;
  padding: 15px;
  border-radius: 10px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.chart {
  background: #121a2f;
  padding: 20px;
  border-radius: 10px;
}

/* Overview cards */
#overview-cards {
  display: flex;
  gap: 12px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}
.card {
  background: linear-gradient(180deg, #1f2a3a, #162029);
  color: #e6eef8;
  padding: 10px 14px;
  border-radius: 8px;
  min-width: 140px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.45);
}
.card div:first-child { font-size: 12px; opacity: 0.85 }
.card div:last-child { font-size: 18px; font-weight: 700; margin-top: 6px }

/* ATM control */
#atm-control {
  display: flex;
  gap: 8px;
  align-items: center;
  margin-bottom: 8px;
  color: #cbd7e6;
}
#atm-control input[type="number"] {
  width: 70px;
  padding: 6px 8px;
  border-radius: 8px;
  border: none;
}