/**
 * Component Styles
 * Reusable UI component styling
 */

/* ===== Buttons ===== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  height: var(--button-height);
  padding: var(--button-padding-y) var(--button-padding-x);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  border-radius: var(--button-border-radius);
  transition: all var(--transition-fast);
  cursor: pointer;
  user-select: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-bg);
}

.btn-primary:hover:not(:disabled) {
  background-color: var(--color-accent-hover);
}

.btn-secondary {
  background-color: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  background-color: var(--color-surface-hover);
}

.btn-danger {
  background-color: var(--color-danger);
  color: var(--color-text);
}

.btn-danger:hover:not(:disabled) {
  background-color: var(--color-danger-hover);
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-text-secondary);
}

.btn-ghost:hover:not(:disabled) {
  background-color: var(--color-surface);
  color: var(--color-text);
}

.btn-sm {
  height: 36px;
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-sm);
}

.btn-lg {
  height: 52px;
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-lg);
}

/* ===== Form Elements ===== */

.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-secondary);
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  height: var(--input-height);
  padding: var(--input-padding-y) var(--input-padding-x);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-surface);
  border: var(--input-border-width) solid var(--color-border);
  border-radius: var(--input-border-radius);
  transition: all var(--transition-fast);
}

.form-textarea {
  height: auto;
  min-height: 100px;
  resize: vertical;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: var(--shadow-focus);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-muted);
}

.form-error {
  display: block;
  margin-top: var(--spacing-xs);
  font-size: var(--font-size-sm);
  color: var(--color-danger);
}

.form-hint {
  display: block;
  margin-top: var(--spacing-xs);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* Range Slider */
input[type="range"].form-range {
  width: 100%;
  height: 6px;
  background: var(--color-coffee);
  border-radius: var(--radius-full);
  outline: none;
}

.form-range::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: background-color var(--transition-fast);
}

.form-range::-webkit-slider-thumb:hover {
  background: var(--color-accent-hover);
}

.form-range::-moz-range-thumb {
  width: 20px;
  height: 20px;
  background: var(--color-accent);
  border: none;
  border-radius: var(--radius-full);
  cursor: pointer;
}

/* ===== Cards ===== */

.card {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.card-body {
  padding: var(--spacing-lg);
}

.card-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

/* ===== Rating Stars ===== */

.rating {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.rating-star {
  font-size: var(--font-size-xl);
  color: var(--color-star-empty);
  cursor: pointer;
  transition: color var(--transition-fast);
}

.rating-star.filled {
  color: var(--color-star);
}

.rating-star:hover {
  color: var(--color-star);
}

.rating-value {
  margin-left: var(--spacing-sm);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}

/* ===== Badge ===== */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  line-height: 1;
  border-radius: var(--radius-full);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
}

.badge-success {
  background-color: var(--color-success-bg);
  color: var(--color-success);
}

.badge-danger {
  background-color: var(--color-danger-bg);
  color: var(--color-danger);
}

.badge-warning {
  background-color: var(--color-warning-bg);
  color: var(--color-warning);
}

.badge-info {
  background-color: var(--color-info-bg);
  color: var(--color-info);
}

/* ===== Alert/Toast ===== */

.alert {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
}

.alert-success {
  background-color: var(--color-success-bg);
  border: 1px solid var(--color-success);
  color: var(--color-success);
}

.alert-error {
  background-color: var(--color-danger-bg);
  border: 1px solid var(--color-danger);
  color: var(--color-danger);
}

.alert-warning {
  background-color: var(--color-warning-bg);
  border: 1px solid var(--color-warning);
  color: var(--color-warning);
}

.alert-info {
  background-color: var(--color-info-bg);
  border: 1px solid var(--color-info);
  color: var(--color-info);
}

/* ===== Modal ===== */

.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.7);
  z-index: var(--z-index-modal-backdrop);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-md);
}

.modal {
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  max-width: 500px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  z-index: var(--z-index-modal);
}

.modal-header {
  padding: var(--spacing-lg);
  border-bottom: 1px solid var(--color-border);
}

.modal-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin: 0;
}

.modal-body {
  padding: var(--spacing-lg);
}

.modal-footer {
  padding: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-end;
}

/* ===== Empty State ===== */

.empty-state {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-md);
}

.empty-state-icon {
  font-size: var(--font-size-4xl);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-md);
}

.empty-state-title {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.empty-state-message {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-lg);
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== Loading Spinner ===== */

.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-surface);
  border-top-color: var(--color-accent);
  border-radius: var(--radius-full);
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: var(--z-index-modal);
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid var(--color-surface);
  border-top-color: var(--color-accent);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

/* ===== List ===== */

.list {
  list-style: none;
}

.list-item {
  padding: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  transition: background-color var(--transition-fast);
  cursor: pointer;
}

.list-item:last-child {
  border-bottom: none;
}

.list-item:hover {
  background-color: var(--color-surface-hover);
}

.list-item-clickable {
  cursor: pointer;
}

/* ===== Parameters Section ===== */

.parameters-section {
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border);
}

.parameter-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.parameter-card:last-child {
  margin-bottom: 0;
}

.parameter-config {
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
}

#parameters-container {
  margin-top: var(--spacing-md);
}

/* ===== Language Switcher ===== */

.language-switcher {
  display: flex;
  gap: var(--spacing-xs);
  align-items: center;
}

.language-btn {
  background: transparent;
  border: 2px solid transparent;
  border-radius: var(--border-radius);
  padding: var(--spacing-xs);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: all var(--transition-fast);
  opacity: 0.6;
}

.language-btn:hover {
  opacity: 1;
  background-color: var(--color-surface);
  transform: scale(1.1);
}

.language-btn.active {
  opacity: 1;
  border-color: var(--color-accent);
  background-color: var(--color-surface);
}

/* ===== Checkbox ===== */

.checkbox-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.checkbox-input {
  width: 18px;
  height: 18px;
  cursor: pointer;
  accent-color: var(--color-accent);
}

.checkbox-label {
  font-size: var(--font-size-sm);
  color: var(--color-text);
  cursor: pointer;
  user-select: none;
}

/* ===== AI Suggestion Card ===== */

.ai-suggestion-card {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 12px;
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  color: white;
  position: relative;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.ai-suggestion-card.blurred .ai-suggestion-header,
.ai-suggestion-card.blurred .ai-suggestion-params,
.ai-suggestion-card.blurred .ai-suggestion-actions {
  filter: blur(8px);
  pointer-events: none;
}

.ai-suggestion-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-md);
}

.ai-badge {
  background: rgba(255, 255, 255, 0.2);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-weight: 600;
  font-size: var(--font-size-sm);
  backdrop-filter: blur(10px);
}

.ai-status {
  font-size: var(--font-size-sm);
  opacity: 0.9;
  font-weight: 500;
}

.ai-suggestion-params {
  background: rgba(255, 255, 255, 0.1);
  padding: var(--spacing-md);
  border-radius: 8px;
  margin-bottom: var(--spacing-md);
  backdrop-filter: blur(5px);
}

.ai-suggestion-params .param-row {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.ai-suggestion-params .param-row:last-child {
  border-bottom: none;
}

.ai-suggestion-params .param-name {
  font-weight: 500;
  opacity: 0.9;
}

.ai-suggestion-params .param-value {
  font-weight: 700;
  font-family: var(--font-mono);
}

.ai-expected-rating {
  background: rgba(255, 255, 255, 0.15);
  padding: var(--spacing-md);
  border-radius: 8px;
  margin-bottom: var(--spacing-md);
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.ai-expected-rating .expected-label {
  font-weight: 600;
  font-size: var(--font-size-sm);
  opacity: 0.9;
  margin-bottom: var(--spacing-xs);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.ai-expected-rating .expected-rating-value {
  font-size: var(--font-size-xl);
  font-weight: 700;
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
}

.ai-expected-rating .rating-mean {
  font-size: var(--font-size-xl);
  font-weight: 700;
}

.ai-expected-rating .rating-variance {
  font-size: var(--font-size-lg);
  font-weight: 600;
  opacity: 0.9;
}

.ai-expected-rating .rating-range {
  font-size: var(--font-size-sm);
  font-weight: 500;
  opacity: 0.8;
  margin-left: var(--spacing-xs);
}

.ai-suggestion-card.blurred .ai-expected-rating {
  filter: blur(8px);
  pointer-events: none;
}

.ai-suggestion-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  padding: var(--spacing-xl);
  text-align: center;
  backdrop-filter: blur(10px);
  pointer-events: auto;
  z-index: 10;
}

.ai-overlay-title {
  color: white;
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin: 0 0 var(--spacing-md) 0;
  line-height: 1.3;
}

.ai-overlay-message {
  color: rgba(255, 255, 255, 0.95);
  font-size: var(--font-size-base);
  margin: 0 0 var(--spacing-lg) 0;
  line-height: 1.6;
  max-width: 320px;
}

.ai-suggestion-overlay p {
  color: white;
  font-size: var(--font-size-base);
  margin-bottom: var(--spacing-md);
  line-height: 1.5;
}

.ai-suggestion-actions {
  display: flex;
  gap: var(--spacing-md);
  justify-content: flex-end;
}

.ai-suggestion-actions button {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* AI Visualization Section */

.ai-viz-section {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  margin-top: var(--spacing-md);
  padding-top: var(--spacing-md);
}

.ai-viz-toggle,
.ai-viz-collapse {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  padding: 0.75rem;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 6px;
  color: white;
  cursor: pointer;
  font-family: inherit;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
}

.ai-viz-toggle:hover,
.ai-viz-collapse:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
}

.ai-viz-toggle .toggle-icon,
.ai-viz-collapse .toggle-icon {
  font-size: 0.75rem;
  transition: transform 0.2s ease;
}

.ai-viz-content {
  margin-top: var(--spacing-md);
}

.ai-viz-content .bo-curve-visualization {
  margin: 0;
  background: transparent;
  backdrop-filter: none;
}

.ai-viz-collapse {
  margin-top: var(--spacing-md);
  background: rgba(255, 255, 255, 0.05);
}

/* ===== AI Settings Form ===== */

.ai-settings-form {
  margin-bottom: var(--spacing-lg);
}

.ai-settings-form .form-group {
  margin-bottom: var(--spacing-lg);
}

.ai-settings-form .form-help {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: var(--spacing-xs) 0 var(--spacing-sm) 0;
  line-height: 1.4;
}

/* ===== BO Curve Visualization ===== */

.bo-curve-visualization {
  margin: 2rem 0;
  padding: 1.5rem;
  background: transparent;
  border-radius: 8px;
}

.bo-curve-canvas {
  display: block;
  margin: 0 auto 1.5rem;
  background: transparent;
  border-radius: 4px;
  user-select: none;
  -webkit-user-select: none;
  touch-action: none;
  cursor: ew-resize;
}

.bo-param-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.bo-param-button {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  padding: 0.75rem 1.25rem;
  background: rgba(255, 255, 255, 0.15);
  border: none;
  border-radius: 999px;
  cursor: pointer;
  transition: all 0.2s ease;
  font-family: inherit;
  min-width: 100px;
}

.bo-param-button:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-1px);
}

.bo-param-button.active {
  background: rgba(255, 255, 255, 0.2);
  box-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

.bo-param-button .param-name {
  font-size: 0.85rem;
  color: white;
  font-weight: 700;
}

.bo-param-button.active .param-name {
  font-weight: 900;
}

.bo-param-button .param-value {
  font-size: 1rem;
  color: white;
  font-weight: 700;
  font-family: 'Courier New', monospace;
}

.bo-param-button.active .param-value {
  color: white;
}

/* ===== Introduction/Tutorial Overlay ===== */

.intro-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.95);
  z-index: 10000;
  opacity: 0;
  transition: opacity 0.3s ease;
  overflow-y: auto;
  overflow-x: hidden;
  padding: var(--spacing-lg) var(--spacing-md);
}

.intro-overlay-visible {
  opacity: 1;
}

.intro-content {
  position: relative;
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  background-color: var(--color-surface);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-xl);
  min-height: min-content;
}

.intro-close-btn {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: var(--color-danger);
  color: white;
  border: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  z-index: 10;
}

.intro-close-btn:hover {
  background-color: var(--color-danger-hover);
  transform: scale(1.1);
}

.intro-language-selector {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 2px solid var(--color-border);
}

/* Modern language button style for intro */
.intro-language-selector .language-btn {
  background-color: var(--color-bg-secondary);
  border: 2px solid var(--color-border);
  border-radius: 50px; /* Pill shape */
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  transition: all var(--transition-fast);
  opacity: 1;
}

.intro-language-selector .language-btn:hover {
  background-color: var(--color-surface-hover);
  border-color: var(--color-accent);
  transform: scale(1.05);
}

.intro-language-selector .language-btn.active {
  background-color: var(--color-accent);
  color: var(--color-bg);
  border-color: var(--color-accent);
}

.skip-tutorial-btn {
  background-color: var(--color-bg-secondary);
  color: var(--color-text-primary);
  border: 2px solid var(--color-border);
  border-radius: 50px; /* Pill shape */
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.skip-tutorial-btn:hover {
  background-color: var(--color-surface-hover);
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.intro-steps-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
}

.intro-step {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.intro-step-label {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-accent);
  text-align: center;
  padding: var(--spacing-sm) 0;
}

.intro-step-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  text-align: center;
  padding: 0 0 var(--spacing-md) 0;
  margin-bottom: var(--spacing-sm);
}

.intro-image-container {
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--color-bg);
}

.intro-image {
  width: 100%;
  height: auto;
  display: block;
}

.intro-button-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-lg);
  padding-top: var(--spacing-xl);
  margin-top: var(--spacing-xl);
  border-top: 2px solid var(--color-border);
}

.intro-ready-text {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  text-align: center;
  max-width: 600px;
  line-height: 1.6;
  margin: 0;
}

/* Responsive adjustments for introduction */
@media (max-width: 768px) {
  .intro-content {
    padding: var(--spacing-md);
  }

  .intro-step-label {
    font-size: var(--font-size-lg);
  }

  .intro-close-btn {
    width: 36px;
    height: 36px;
    font-size: 20px;
  }

  .intro-ready-text {
    font-size: var(--font-size-base);
  }
}