/* --- General & Reset --- */
body {
  font-family: 'Noto Sans KR', sans-serif;
  margin: 0;
  background-color: #f0f4f8; /* Lighter, cooler background */
  color: #333;
  line-height: 1.6;
  display: flex;
  justify-content: center;
  align-items: flex-start;
  min-height: 100vh;
  padding: 20px;
  box-sizing: border-box;
}

button, input, textarea, select {
  font-family: inherit;
  font-size: 1em;
}

/* --- Main Container & Header --- */
.container {
  width: 100%;
  max-width: 800px;
  background-color: #ffffff;
  border-radius: 16px;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.1);
  padding: 30px 40px;
  box-sizing: border-box;
}

.header {
  text-align: center;
  margin-bottom: 30px;
  border-bottom: 1px solid #e0e0e0;
  padding-bottom: 20px;
}

h1 {
  color: #1a237e; /* Deep indigo */
  font-weight: 700;
  font-size: 2.2em;
  margin: 0;
}

.subtitle {
  font-size: 1.1em;
  color: #555;
  margin: 5px 0 0;
}

/* --- Steps Indicator --- */
.steps-indicator {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
  user-select: none;
}

.step-marker {
  font-size: 0.9em;
  color: #888;
  font-weight: 500;
  padding: 8px 12px;
  border-radius: 20px;
  background-color: #f1f1f1;
  transition: all 0.3s ease;
}

.step-marker.active {
  background-color: #3f51b5; /* Indigo */
  color: #fff;
  font-weight: 700;
}

.step-connector {
  flex-grow: 1;
  height: 2px;
  background-color: #e0e0e0;
  margin: 0 10px;
}

/* --- Step Content --- */
.step {
  display: none; /* Hidden by default */
  padding: 20px 0;
  animation: fadeIn 0.5s ease;
}

.step.active {
  display: block; /* Shown when active */
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.step h2 {
  font-size: 1.5em;
  color: #333;
  margin-bottom: 25px;
  text-align: center;
}

/* --- Choice & Form Sections --- */
.choice-section {
  margin-bottom: 25px;
}

.choice-section h3, .choice-section > label {
  font-size: 1.2em;
  color: #444;
  margin-bottom: 15px;
  text-align: center;
  display: block;
  font-weight: 500;
}

/* Hybrid (Button + Select) Styles */
.hybrid-options {
  display: flex;
  gap: 10px;
}

.option-btn {
  padding: 10px 15px;
  border: 2px solid #ddd;
  background-color: #fff;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-weight: 500;
  flex-shrink: 0; /* Prevent buttons from shrinking */
}

.option-btn:hover {
  border-color: #3f51b5;
  color: #3f51b5;
}

.option-btn.selected {
  background-color: #e8eaf6; /* Light indigo */
  border-color: #3f51b5;
  color: #1a237e;
  font-weight: 700;
}

.choice-select-hybrid {
  flex-grow: 1; /* Dropdown takes remaining space */
}

/* Select Elements */
.choice-select, .choice-select-hybrid {
  width: 100%;
  padding: 12px;
  border: 1px solid #ccc;
  border-radius: 6px;
  background-color: #fff;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23666' width='18px' height='18px'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3Cpath d='M0 0h24v24H0z' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  cursor: pointer;
  box-sizing: border-box;
  transition: border-color 0.3s ease;
}

.choice-select:focus, .choice-select-hybrid:focus {
  border-color: #3f51b5;
  outline: none;
}

/* Checkbox Styles (Step 3) */
.checkbox-options {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
  margin-bottom: 15px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  padding: 10px;
  background-color: #fafafa;
  border-radius: 6px;
  border: 1px solid #eee;
  cursor: pointer;
  transition: background-color 0.2s;
}

.checkbox-label:hover {
  background-color: #f0f0f0;
}

.checkbox-label input[type="checkbox"] {
  margin-right: 10px;
  transform: scale(1.1);
  accent-color: #3f51b5;
}

/* Custom Input Fields */
.custom-input {
  display: none; /* Hidden by default */
  width: 100%;
  padding: 12px;
  border: 1px solid #3f51b5; /* Highlight as it's a special input */
  border-radius: 6px;
  box-sizing: border-box;
  margin-top: 10px;
}

.custom-input.visible {
  display: block; /* Shown when JS adds this class */
  animation: fadeIn 0.5s ease;
}


/* --- Form (Step 3) --- */
.form-container {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.form-container > label {
  font-weight: 500;
  color: #333;
}

.form-container input[type="text"], .form-container textarea {
  width: 100%;
  padding: 12px;
  border: 1px solid #ccc;
  border-radius: 6px;
  box-sizing: border-box;
  transition: border-color 0.3s ease;
}

.form-container input[type="text"]:focus, .form-container textarea:focus {
  border-color: #3f51b5;
  outline: none;
}

.form-container textarea {
  min-height: 80px;
  resize: vertical;
}

/* --- Navigation & Output --- */
.navigation-btns {
  display: flex;
  justify-content: flex-end; /* Align buttons to the right */
  gap: 10px;
  margin-top: 30px;
}

.navigation-btns .back-btn {
  margin-right: auto; /* Pushes back button to the left */
}

.nav-btn {
  background-color: #3f51b5;
  color: #fff;
  border: none;
  padding: 12px 30px;
  font-size: 1em;
  font-weight: 700;
  border-radius: 8px;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.nav-btn:hover {
  background-color: #303f9f; /* Darker indigo */
}

.nav-btn.back-btn {
  background-color: #78909c; /* Blue grey */
}

.nav-btn.back-btn:hover {
  background-color: #546e7a;
}

.output-section {
  margin-top: 40px;
  border-top: 1px solid #e0e0e0;
  padding-top: 30px;
}

.output-section h2 {
  text-align: center;
  color: #1a237e;
  margin-bottom: 20px;
}

.prompt-display {
  background-color: #f9f9f9;
  padding: 20px;
  border-radius: 8px;
  min-height: 150px;
  font-family: 'D2 Coding', 'Fira Code', 'Lucida Console', Monaco, monospace;
  font-size: 0.95em;
  color: #2c3e50;
  white-space: pre-wrap;
  word-wrap: break-word;
  border: 1px solid #eee;
}

#copyButton {
  display: block;
  width: auto;
  margin: 20px auto 0;
  padding: 12px 25px;
  background-color: #4caf50; /* Green */
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 1.1em;
  cursor: pointer;
  transition: all 0.3s ease;
  font-weight: 700;
}

#copyButton:hover {
  background-color: #388e3c; /* Darker green */
  transform: translateY(-2px);
}

/* --- Responsive Adjustments --- */
@media (max-width: 600px) {
  body {
    padding: 10px;
  }
  .container {
    padding: 20px;
  }
  .steps-indicator {
    font-size: 0.8em;
  }
  h1 { font-size: 1.8em; }
  .step h2 { font-size: 1.3em; }
}