* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Inter", sans-serif;
  background: linear-gradient(180deg, #0a2018, #08070c 60%);
}

.card {
  width: 360px;
  padding: 24px;
  border-radius: 28px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: #0d1310;
}

.sheet-title {
  margin-bottom: 18px;
  font-size: 20px;
  font-weight: 700;
  color: #ecfdf5;
}

.credit-card {
  padding: 22px;
  border-radius: 18px;
  background: linear-gradient(135deg, #10b981, #065f46);
}

.card-top {
  display: flex;
  justify-content: space-between;
}

.chip {
  width: 42px;
  height: 30px;
  border-radius: 7px;
  background: linear-gradient(135deg, #f4d27a, #c79a3c);
}

.brand {
  font-size: 17px;
  font-weight: 800;
  font-style: italic;
  color: #fff;
}

.card-number {
  margin-top: 34px;
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: #f0fdf4;
}

.card-foot {
  display: flex;
  justify-content: space-between;
  margin-top: 18px;
  font-size: 13px;
  font-weight: 600;
  color: rgba(240, 253, 244, 0.85);
}

.amount {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 20px;
  padding: 16px 18px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.04);
  font-size: 14px;
  color: rgba(220, 244, 234, 0.55);
}

.amount-value {
  font-size: 24px;
  font-weight: 800;
  color: #ecfdf5;
}

.confirm {
  width: 100%;
  margin-top: 18px;
  padding: 17px 0;
  border: none;
  border-radius: 16px;
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  color: #022c22;
  background: linear-gradient(135deg, #34d399, #059669);
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.5);
  }
  50% {
    box-shadow: 0 0 0 10px rgba(16, 185, 129, 0);
  }
}