body {
  margin: 0;
  font-family: Arial;
  background: #f5f5f5;
}

.container {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.logo {
  width: 120px;
  margin-bottom: 20px;
}

.card {
  background: white;
  padding: 25px;
  width: 90%;
  max-width: 350px;
  border-radius: 8px;
  box-shadow: 0 0 10px rgba(0,0,0,0.1);
}

.card h2 {
  text-align: center;
}

.card input {
  box-sizing: border-box;
  width: 100%;
  padding: 10px;
  margin: 10px 0;
}

.card textarea {
  box-sizing: border-box;
  width: 100%;
  padding: 10px;
  margin: 10px 0;
  font-family: Arial;
  resize: vertical;
}

.card button {
  width: 100%;
  padding: 10px;
  background: #007bff;
  color: white;
  border: none;
  border-radius: 5px;
}

.card button:disabled {
  opacity: .7;
  cursor: not-allowed;
}

.card p {
  text-align: center;
}

.register-card {
  max-width: 430px;
}

.selected-plan {
  background: #f3f8ff;
  border: 1px solid #d9eaff;
  border-radius: 8px;
  margin: 14px 0;
  padding: 14px;
}

.selected-plan-head {
  align-items: center;
  display: flex;
  justify-content: space-between;
  gap: 12px;
}

.selected-plan-head button {
  background: #ffffff;
  border: 1px solid #007bff;
  border-radius: 5px;
  color: #007bff;
  flex: 0 0 auto;
  font-size: 12px;
  padding: 7px 10px;
  width: auto;
}

.selected-plan span,
.selected-plan small {
  color: #666;
  display: block;
}

.selected-plan strong {
  color: #111;
  display: block;
  font-size: 20px;
  margin: 4px 0 10px;
}

.selected-plan-price {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.selected-plan b {
  color: #007bff;
  font-size: 18px;
}

.alert {
  border-radius: 6px;
  box-sizing: border-box;
  margin: 12px 0;
  padding: 10px;
  width: 100%;
}

.alert-error {
  background: #fff1f1;
  border: 1px solid #ffc8c8;
  color: #b00020;
}

.alert-success {
  background: #effaf1;
  border: 1px solid #c7efcf;
  color: #176b2c;
}

.plan-picker label {
  color: #333;
  display: block;
  font-weight: 700;
  margin: 12px 0 8px;
}

.plan-picker select {
  background: #fff;
  border: 1px solid #cfd8e3;
  border-radius: 6px;
  box-sizing: border-box;
  font-size: 15px;
  margin: 0 0 14px;
  padding: 11px;
  width: 100%;
}

.result-modal {
  align-items: center;
  background: rgba(0,0,0,.5);
  bottom: 0;
  display: flex;
  justify-content: center;
  left: 0;
  padding: 20px;
  position: fixed;
  right: 0;
  top: 0;
  z-index: 50;
}

.result-modal[hidden] {
  display: none;
}

.result-box {
  background: #fff;
  border-radius: 8px;
  box-shadow: 0 20px 50px rgba(0,0,0,.25);
  max-width: 360px;
  overflow: hidden;
  padding: 30px 24px 24px;
  position: relative;
  text-align: center;
  width: 100%;
}

.result-icon {
  align-items: center;
  border-radius: 50%;
  color: #fff;
  display: inline-flex;
  font-weight: 700;
  height: 64px;
  justify-content: center;
  margin-bottom: 12px;
  width: 64px;
}

.result-box.success .result-icon {
  background: #10a95b;
}

.result-box.failure .result-icon {
  background: #d93025;
}

.result-box h3 {
  font-size: 24px;
  margin: 8px 0;
}

.result-box p {
  color: #555;
  line-height: 1.45;
  margin: 0 0 18px;
}

.result-box button {
  background: #007bff;
  border: none;
  border-radius: 5px;
  color: #fff;
  padding: 11px 16px;
}

.success-burst {
  height: 140px;
  left: 50%;
  pointer-events: none;
  position: absolute;
  top: 24px;
  transform: translateX(-50%);
  width: 220px;
}

.success-burst span {
  animation: burst 900ms ease-out infinite;
  background: #ffbf00;
  border-radius: 2px;
  height: 10px;
  left: 50%;
  position: absolute;
  top: 42px;
  transform-origin: center;
  width: 6px;
}

.success-burst span:nth-child(2n) {
  background: #11a5ff;
}

.success-burst span:nth-child(3n) {
  background: #10a95b;
}

.success-burst span:nth-child(1) { transform: rotate(0deg) translateY(-58px); }
.success-burst span:nth-child(2) { transform: rotate(30deg) translateY(-58px); }
.success-burst span:nth-child(3) { transform: rotate(60deg) translateY(-58px); }
.success-burst span:nth-child(4) { transform: rotate(90deg) translateY(-58px); }
.success-burst span:nth-child(5) { transform: rotate(120deg) translateY(-58px); }
.success-burst span:nth-child(6) { transform: rotate(150deg) translateY(-58px); }
.success-burst span:nth-child(7) { transform: rotate(180deg) translateY(-58px); }
.success-burst span:nth-child(8) { transform: rotate(210deg) translateY(-58px); }
.success-burst span:nth-child(9) { transform: rotate(240deg) translateY(-58px); }
.success-burst span:nth-child(10) { transform: rotate(270deg) translateY(-58px); }
.success-burst span:nth-child(11) { transform: rotate(300deg) translateY(-58px); }
.success-burst span:nth-child(12) { transform: rotate(330deg) translateY(-58px); }

@keyframes burst {
  0% {
    opacity: 0;
  }
  25% {
    opacity: 1;
  }
  100% {
    opacity: 0;
    top: 4px;
  }
}