/**
 * HabitFlow - Phase 2 Interactive Onboarding Styles
 * Mobile-first, app-like questionnaire interface.
 * Reuses Phase 1 design tokens from variables.css.
 */

/* ==========================================================================
   1. Onboarding Page Layout & App Shell
   ========================================================================== */
.onboarding-app {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background-color: var(--background);
  color: var(--text);
  font-family: var(--font-sans);
  position: relative;
  overflow-x: hidden;
}

/* App Header / Navigation Bar */
.onboarding-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.onboarding-nav-left {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.onboarding-back-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: 38px;
  min-width: 44px;
}

.onboarding-back-btn:hover:not(:disabled) {
  background-color: var(--surface-secondary);
  color: var(--text);
  border-color: var(--text-muted);
}

.onboarding-back-btn:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}

.onboarding-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-weight: 800;
  font-size: 1.15rem;
  color: var(--text);
  text-decoration: none;
}

.onboarding-brand-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background-color: var(--primary);
  color: var(--text-on-primary);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 900;
}

.onboarding-step-counter {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
  background-color: var(--surface-secondary);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  letter-spacing: 0.5px;
}

/* Smooth Progress Bar */
.onboarding-progress-track {
  width: 100%;
  height: 4px;
  background-color: var(--surface-muted);
  position: relative;
  overflow: hidden;
}

.onboarding-progress-fill {
  height: 100%;
  background-color: var(--primary);
  width: 0%;
  transition: width var(--transition-smooth);
}

/* ==========================================================================
   2. Main Content Canvas
   ========================================================================== */
.onboarding-main {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 100%;
  max-width: 680px;
  margin: 0 auto;
  padding: var(--space-5) var(--space-4) var(--space-12);
  position: relative;
}

/* Motivational Microcopy Tag */
.onboarding-microcopy {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--primary-dark);
  background-color: var(--primary-light);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-3);
  align-self: flex-start;
  animation: fadeIn 300ms ease-out;
}

/* Question Header */
.question-title {
  font-size: clamp(1.4rem, 4vw, 1.85rem);
  font-weight: 800;
  line-height: 1.25;
  color: var(--text);
  margin-bottom: var(--space-2);
  letter-spacing: -0.02em;
}

.question-subtitle {
  font-size: 0.95rem;
  line-height: 1.55;
  color: var(--text-secondary);
  margin-bottom: var(--space-6);
}

/* Step Container & Transition Animations */
.step-pane {
  display: none;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.step-pane.active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .step-pane,
  .onboarding-progress-fill,
  .onboarding-microcopy {
    transition: none !important;
    animation: none !important;
  }
}

/* ==========================================================================
   3. Form Inputs & Selectable Options
   ========================================================================== */

/* Text / Email / Phone Controls */
.input-wrapper {
  margin-bottom: var(--space-4);
  position: relative;
}

.input-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: var(--space-2);
}

.text-input-field {
  width: 100%;
  height: 54px;
  padding: 0 var(--space-4);
  font-size: 1.05rem;
  font-family: inherit;
  color: var(--text);
  background-color: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.text-input-field:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.text-input-field::placeholder {
  color: var(--text-muted);
}

/* Phone input with country dial prefix */
.phone-input-group {
  display: flex;
  gap: var(--space-2);
  align-items: stretch;
}

.phone-prefix-select {
  width: 110px;
  height: 54px;
  padding: 0 var(--space-3);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  background-color: var(--surface-secondary);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  outline: none;
}

.phone-prefix-select:focus {
  border-color: var(--primary);
}

/* Custom Goal Textarea */
.textarea-field {
  width: 100%;
  min-height: 120px;
  padding: var(--space-3) var(--space-4);
  font-size: 1rem;
  font-family: inherit;
  color: var(--text);
  background-color: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  resize: vertical;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.textarea-field:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.char-counter {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: right;
  margin-top: 4px;
}

/* Validation Feedback Messages */
.field-error-msg {
  display: none;
  align-items: center;
  gap: 6px;
  color: var(--danger);
  font-size: 0.85rem;
  font-weight: 600;
  margin-top: 6px;
}

.field-error-msg.visible {
  display: flex;
}

/* ==========================================================================
   4. Option Cards (Single Select & Multi Select)
   ========================================================================== */
.options-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.options-grid-2col {
  grid-template-columns: 1fr;
}

@media (min-width: 540px) {
  .options-grid-2col {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Selectable Card Base */
.option-card {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  padding: var(--space-4);
  min-height: 60px;
  background-color: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
  text-align: left;
  width: 100%;
}

.option-card:hover {
  border-color: var(--primary-dark);
  background-color: var(--surface-secondary);
}

.option-card:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* Selected State */
.option-card.selected {
  border-color: var(--primary);
  background-color: var(--primary-light);
  box-shadow: 0 2px 8px var(--primary-glow);
}

.option-card-content {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex: 1;
}

.option-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background-color: var(--surface-secondary);
}

.option-card.selected .option-icon {
  background-color: var(--surface);
}

.option-text-group {
  display: flex;
  flex-direction: column;
}

.option-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}

.option-desc {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  margin-top: 2px;
  line-height: 1.4;
}

/* Checkbox / Radio Indicator */
.option-indicator {
  width: 22px;
  height: 22px;
  border-radius: var(--radius-sm);
  border: 1.5px solid var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: all var(--transition-fast);
  background-color: var(--surface);
}

.option-indicator.indicator-radio {
  border-radius: var(--radius-full);
}

.option-card.selected .option-indicator {
  border-color: var(--primary);
  background-color: var(--primary);
  color: var(--text-on-primary);
}

.option-indicator svg {
  width: 14px;
  height: 14px;
  stroke: var(--text-on-primary);
  stroke-width: 2.5;
  fill: none;
  opacity: 0;
  transform: scale(0.5);
  transition: all var(--transition-fast);
}

.option-card.selected .option-indicator svg {
  opacity: 1;
  transform: scale(1);
}

/* Selection counter pill for multi-select (e.g. "Selected: 4") */
.selection-counter-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-3);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.selection-badge {
  background-color: var(--primary-light);
  color: var(--primary-dark);
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
}

/* Categorized Interests Sections (Step 07) */
.interest-category-group {
  margin-bottom: var(--space-5);
}

.interest-category-header {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: var(--space-2);
  padding-bottom: 4px;
  border-bottom: 1px solid var(--border);
}

/* ==========================================================================
   5. Action Buttons (Continue, Skip, Loading State)
   ========================================================================== */
.onboarding-footer {
  margin-top: var(--space-6);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.btn-continue {
  height: 52px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  width: 100%;
  font-size: 1rem;
  font-weight: 700;
  background-color: var(--primary);
  color: var(--text-on-primary);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  min-height: 48px;
}

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

.btn-continue:active:not(:disabled) {
  transform: scale(0.99);
}

.btn-continue:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-skip {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 600;
  padding: var(--space-2);
  cursor: pointer;
  text-align: center;
  transition: color var(--transition-fast);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn-skip:hover {
  color: var(--text);
  text-decoration: underline;
}

/* Loading Spinner on Button */
.btn-spinner {
  width: 18px;
  height: 18px;
  border: 2.5px solid rgba(255, 255, 255, 0.3);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  display: none;
}

.btn-continue.is-loading .btn-spinner {
  display: inline-block;
}

.btn-continue.is-loading .btn-text {
  display: none;
}

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

/* Toast / Global Error Banner */
.onboarding-toast {
  display: none;
  position: fixed;
  bottom: calc(var(--space-6) + var(--safe-bottom));
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--surface-elevated);
  border: 1px solid var(--danger);
  color: var(--text);
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  z-index: 100;
  font-size: 0.875rem;
  font-weight: 600;
  max-width: 90%;
  animation: slideUp 200ms ease-out;
}

.onboarding-toast.visible {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

@keyframes slideUp {
  from { transform: translate(-50%, 15px); opacity: 0; }
  to   { transform: translate(-50%, 0); opacity: 1; }
}