body, html {
  height: 100%;
  margin: 0;
  padding: 0;
}

.center-bg {
  min-height: 100vh;
  width: 100vw;
  background: linear-gradient(120deg, #724c9a 0%, #6e3bab 100%);
  display: flex;
  align-items: center;
  justify-content: center;
}

.bank-card {
  background: #141517;
  border-radius: 32px;
  box-shadow: 0 6px 44px rgba(24,30,80,0.33);
  width: 370px;
  padding: 36px 30px 34px 30px;
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.logo-circle {
  background: #2d3042;
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  margin-top: -38px;
}

.main-heading {
  font-size: 1.5em;
  font-weight: bold;
  margin: 2px 0 7px 0;
  text-align: center;
}

.sub-heading {
  color: #aaa;
  margin-bottom: 26px;
  font-size: 1em;
  text-align: center;
}

form {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: stretch;
}

.label-group {
  font-weight: 700;
  color: #fafafa;
  font-size: 1em;
  margin-top: 13px;
  margin-bottom: 7px;
  text-align: left;
}

.input-field {
  width: 100%;
  padding: 11px 13px;
  border-radius: 7px;
  border: none;
  margin-bottom: 13px;
  font-size: 1.07em;
  background: #23272f;
  color: #fff;
  box-sizing: border-box;
  outline: none;
}

.input-field:focus {
  background: #1a5e6b;
  outline: 2px solid #2299FF;
}

.btn {
  font-size: 1.1em;
  font-weight: 700;
  border: none;
  border-radius: 8px;
  padding: 13px 0;
  width: 100%;
  margin-bottom: 16px;
  transition: background 0.18s, transform 0.10s;
  cursor: pointer;
  letter-spacing: 1.2px;
}

.deposit-btn {
  background: #62be82;
  color: #fff;
  margin-bottom: 19px;
}
.deposit-btn:hover {
  background: #409955;
  transform: scale(1.02);
}

.withdraw-btn {
  background: #e24545;
  color: #fff;
}
.withdraw-btn:hover {
  background: #b93030;
  transform: scale(1.02);
}

.balance-label {
  color: #888eb3;
  margin-top: 24px;
  font-size: 1em;
  text-align: center;
}

.balance-value {
  color: #fff;
  font-size: 2.12em;
  font-weight: bold;
  letter-spacing: 1.2px;
  margin-top: 7px;
  text-align: center;
  text-shadow: 0 2px 8px #232343;
}