.form-container {
  font-family: system-ui, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  background: #ffffff;
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
  max-width: 500px;
  margin: 0 auto;
  width: 100%;
}
.stepper-wrapper {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
  position: relative;
}
.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 2;
  position: relative;
}
.circle {
  width: 35px;
  height: 35px;
  border-radius: 50%;
  background: #fff;
  border: 2px solid #e5e7eb;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: #9ca3af;
  transition: all 0.3s ease;
}
.label {
  margin-top: 8px;
  font-size: 0.8rem;
  color: #9ca3af;
  font-weight: 500;
}
.line {
  flex: 1;
  height: 2px;
  background: #e5e7eb;
  margin: 0 -10px 25px -10px;
  z-index: 1;
  transition: background 0.3s ease;
}
/* Active & Completed States */
.step.active .circle {
  border-color: #3b82f6;
  color: #3b82f6;
}
.step.active .label {
  color: #3b82f6;
}
.step.completed .circle {
  background: #3b82f6;
  border-color: #3b82f6;
  color: white;
}
.line.completed {
  background: #3b82f6;
}

.form-step {
  display: none;
  animation: fade 0.3s ease-in-out;
}
.form-step.active {
  display: block;
}
@keyframes fade {
  from { opacity: 0; transform: translateY(5px); }
  to { opacity: 1; transform: translateY(0); }
}
.form-step h2 {
  margin: 0 0 20px 0;
  color: #1f2937;
  font-size: 1.5rem;
}
.input-group {
  margin-bottom: 20px;
}
.input-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: #4b5563;
}
.input-group input {
  width: 100%;
  padding: 12px;
  border: 1px solid #d1d5db;
  border-radius: 8px;
  font-size: 1rem;
  outline: none;
  box-sizing: border-box;
}
.input-group input:focus {
  border-color: #3b82f6;
}
.btn-group {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 30px;
}
button {
  padding: 12px 24px;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}
.btn-next, .btn-submit {
  background: #3b82f6;
  color: white;
}
.btn-next:hover, .btn-submit:hover {
  background: #2563eb;
}
.btn-prev {
  background: #f3f4f6;
  color: #374151;
}
.btn-prev:hover {
  background: #e5e7eb;
}

const nextBtns = document.querySelectorAll(".btn-next");
const prevBtns = document.querySelectorAll(".btn-prev");
const steps = document.querySelectorAll(".step");
const formSteps = document.querySelectorAll(".form-step");
const lines = document.querySelectorAll(".line");

let currentStep = 0;

nextBtns.forEach((btn) => {
  btn.addEventListener("click", () => {
    // Simple validation (check required fields)
    const inputs = formSteps[currentStep].querySelectorAll("input[required]");
    let valid = true;
    inputs.forEach(input => {
        if(!input.value) {
            valid = false;
            input.style.borderColor = "red";
        } else {
            input.style.borderColor = "#d1d5db";
        }
    });
    
    if (valid) {
        currentStep++;
        updateForm();
    }
  });
});

prevBtns.forEach((btn) => {
  btn.addEventListener("click", () => {
    currentStep--;
    updateForm();
  });
});

function updateForm() {
  // Update Form Steps
  formSteps.forEach((step) => step.classList.remove("active"));
  formSteps[currentStep].classList.add("active");

  // Update Stepper UI
  steps.forEach((step, idx) => {
    if (idx <= currentStep) {
        step.classList.add("active");
    } else {
        step.classList.remove("active");
    }
    
    // Mark previous steps as completed
    if (idx < currentStep) {
        step.classList.add("completed");
    } else {
        step.classList.remove("completed");
    }
  });
  
  // Update Connecting Lines
  lines.forEach((line, idx) => {
      if(idx < currentStep) {
          line.classList.add("completed");
      } else {
          line.classList.remove("completed");
      }
  });
}