* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: system-ui, sans-serif;
}

body {
  min-height: 100vh;
  background: #f3f4f6;
  display: flex;
  justify-content: center;
  align-items: center;
}

.wrapper {
  width: 100%;
  max-width: 420px;
  background: #ffffff;
  padding: 28px;
  border-radius: 14px;
  box-shadow: 0 15px 40px rgba(0,0,0,0.12);
}

/* Progress Bar */
.progress-container {
  width: 100%;
  height: 6px;
  background: #e5e7eb;
  border-radius: 20px;
  margin-bottom: 25px;
  overflow: hidden;
}

.progress-line {
  height: 100%;
  width: 0%;
  background: #22c55e;
  transition: width 0.3s ease;
}

/* Steps */
.form-step {
  display: none;
}

.form-step.active {
  display: block;
}

h2 {
  margin-bottom: 16px;
  color: #111827;
}

/* Inputs */
input {
  width: 100%;
  padding: 12px 14px;
  margin-bottom: 14px;
  border-radius: 8px;
  border: 1px solid #d1d5db;
  outline: none;
}

input:focus {
  border-color: #22c55e;
}

input.error {
  border-color: #ef4444;
}

/* Buttons */
.btn {
  padding: 12px;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 500;
}

.next-btn,
.submit-btn {
  background: #22c55e;
  color: #ffffff;
  width: 100%;
}

.next-btn:hover,
.submit-btn:hover {
  background: #16a34a;
}

.back-btn {
  background: #9ca3af;
  color: #ffffff;
  width: 100%;
}

.back-btn:hover {
  background: #6b7280;
}

.btn-group {
  display: flex;
  gap: 10px;
}

/* Responsive */
@media (max-width: 480px) {
  .wrapper {
    margin: 10px;
  }
}