:root {
  --background-color: #f8f9fa; /* Light grey */
  --surface-color: #ffffff; /* White */
  --primary-color: #6200ee;
  --primary-variant-color: #3700b3;
  --on-background-color: #212529; /* Near black */
  --on-surface-color: #212529; /* Near black */
  --on-primary-color: #ffffff;
  --border-color: #dee2e6; /* Light grey */
  --input-background-color: #ffffff; /* White */
  --success-color: #198754; /* Green */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

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

html, body {
  font-family: var(--font-family);
  background-color: var(--background-color);
  color: var(--on-background-color);
  line-height: 1.6;
  font-size: 16px;
}

.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 2rem 1rem 8rem 1rem; /* Padding at bottom for command bar */
}

header {
  text-align: center;
  margin-bottom: 2rem;
}

header h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--on-surface-color);
  margin-bottom: 0.5rem;
}

header p {
  font-size: 1.1rem;
  max-width: 600px;
  margin: 0 auto;
  color: #6c757d; /* Darker grey for readability */
}

.card {
  background-color: var(--surface-color);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  transition: box-shadow 0.3s ease;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05); /* Add subtle shadow for depth */
}

.card:focus-within {
    box-shadow: 0 0 0 2px var(--primary-color);
}

.quick-config-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.75rem;
}

.quick-config-btn {
    padding: 0.75rem 1rem;
    background-color: var(--input-background-color);
    color: var(--on-background-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s ease, border-color 0.3s ease, color 0.3s ease;
    text-align: center;
    font-size: 0.9rem;
}

.quick-config-btn:hover {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--on-primary-color);
}

.quick-config-btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 2px var(--primary-color);
}

.card-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--on-surface-color);
}

#argo-fieldset {
  border: 1px solid var(--border-color);
}

#argo-fieldset:disabled {
    opacity: 0.5;
    pointer-events: none;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

input[type="text"],
select {
  width: 100%;
  padding: 0.75rem;
  background-color: var(--input-background-color);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: var(--on-background-color);
  font-size: 1rem;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 2px rgba(98, 0, 238, 0.3);
}

select {
  appearance: none;
  /* Updated SVG arrow color for light background */
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23212529' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  background-size: 1em;
}

.input-with-button {
  display: flex;
  gap: 0.5rem;
}

.input-with-button input {
  flex-grow: 1;
}

.input-with-button button {
  padding: 0 1.5rem;
  background-color: var(--primary-color);
  color: var(--on-primary-color);
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.input-with-button button:hover {
  background-color: var(--primary-variant-color);
}

.protocol-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.toggle-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 0;
}

.toggle-switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 28px;
  flex-shrink: 0;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: #ced4da; /* Light grey for off state */
  transition: .4s;
  border-radius: 28px;
}

.slider:before {
  position: absolute;
  content: "";
  height: 20px;
  width: 20px;
  left: 4px;
  bottom: 4px;
  background-color: white;
  transition: .4s;
  border-radius: 50%;
  box-shadow: 0 1px 2px rgba(0,0,0,0.2); /* Add subtle shadow to handle */
}

input:checked + .slider {
  background-color: var(--primary-color);
}

input:focus-visible + .slider {
  box-shadow: 0 0 1px var(--primary-color);
}

input:checked + .slider:before {
  transform: translateX(22px);
}

.conditional-group {
    display: none;
    margin-top: 1.5rem;
}

.conditional-group.visible {
    display: block;
}

.conditional-group label {
    margin-top: 1rem;
}

.conditional-group label:first-child {
    margin-top: 0;
}


.command-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--surface-color);
    border-top: 1px solid var(--border-color);
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: 0 -2px 10px rgba(0,0,0,0.1); /* Lighter shadow */
    z-index: 100;
}

.command-output {
    flex-grow: 1;
    background-color: #e9ecef; /* Lighter background for code */
    padding: 0.75rem;
    border-radius: 8px;
    overflow-x: auto;
    max-height: 100px;
    border: 1px solid var(--border-color);
}

.command-output pre {
    white-space: pre-wrap;
    word-wrap: break-word;
}

#generated-command {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.9rem;
  color: var(--on-background-color);
}

#copy-button {
  background-color: var(--primary-color);
  color: var(--on-primary-color);
  border: none;
  border-radius: 8px;
  padding: 0.75rem 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s ease;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

#copy-button:hover {
  background-color: var(--primary-variant-color);
}

#copy-button.copied {
    background-color: var(--success-color);
    color: var(--on-primary-color); /* White text on green background */
}

#copy-button svg {
  fill: currentColor;
}