/**
 * Base Styles
 * Global styles using design system variables
 *
 * Note: reset.css and variables.css are loaded via separate <link> tags
 * in _renderer.tsx for parallel fetching (avoids @import waterfall).
 */

/* Root element styles */
html {
  overflow-x: hidden;
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
}

/* Body styles */
body {
  overflow-x: hidden;
  font-weight: var(--font-weight-normal);
}

/* Headings - Satoshi bold */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  text-transform: uppercase;
}

h1 {
  font-size: var(--font-size-display);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tighter);
}

h2 {
  font-size: var(--font-size-headline);
  line-height: var(--line-height-tight);
  letter-spacing: var(--letter-spacing-tight);
}

h3 {
  font-size: var(--font-size-title);
  line-height: var(--line-height-snug);
  letter-spacing: var(--letter-spacing-tight);
}

h4 {
  font-size: var(--font-size-subhead);
  line-height: var(--line-height-snug);
}

h5 {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-snug);
}

h6 {
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
}

/* Paragraph */
p {
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
  line-height: var(--line-height-relaxed);
}

/* Message bubbles - ensure text color inheritance for nested elements */
.message__bubble p,
.message__bubble span,
.message__bubble a {
  color: inherit;
}

/* Lists - for markdown content */
ul,
ol {
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-lg);
  color: var(--color-text);
}

ul {
  list-style-type: disc;
}

ol {
  list-style-type: decimal;
}

li {
  margin-bottom: var(--spacing-xs);
  line-height: var(--line-height-relaxed);
}

/* Nested lists */
ul ul,
ol ul {
  list-style-type: circle;
  margin-top: var(--spacing-xs);
  margin-bottom: 0;
}

ul ul ul,
ol ul ul {
  list-style-type: square;
}

ol ol,
ul ol {
  list-style-type: lower-alpha;
  margin-top: var(--spacing-xs);
  margin-bottom: 0;
}

/* Blockquotes - for markdown content */
blockquote {
  margin: var(--spacing-md) 0;
  padding: 18px 24px;
  border: 1px solid var(--color-border-light);
  border-left: 3px solid var(--color-selection);
  background-color: var(--color-surface);
  border-radius: 8px;
  font-style: italic;
  color: var(--color-text-muted);
}

.lesson-page .screen-content blockquote {
  color: var(--color-text-muted);
}

/* Callout variants — global */
blockquote.callout--info {
  border-left-color: var(--color-info);
  background-color: var(--color-info-bg);
}

blockquote.callout--warning {
  border-left-color: var(--color-warning);
  background-color: var(--color-warning-bg);
}

blockquote.callout--tip {
  border-left-color: var(--color-success);
  background-color: var(--color-success-bg);
}

.callout--danger {
  border-left-color: var(--color-approach-bad);
  background-color: var(--color-callout-error-bg, #FFF5F5);
}

.callout--action {
  border-left-color: var(--color-callout-purple, #805AD5);
  background-color: var(--color-callout-purple-bg, #FAF5FF);
}

blockquote p {
  margin-bottom: 0;
}

blockquote p:not(:last-child) {
  margin-bottom: var(--spacing-sm);
}

/* Nested blockquotes */
blockquote blockquote {
  margin-top: var(--spacing-sm);
  border-left-color: var(--color-border-light);
}

/* Tables — Premium Apple-style (#399) */
.table-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-bottom: var(--spacing-lg);
  border-radius: var(--radius-md, 12px);
  background: var(--color-surface);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04), 0 4px 12px rgba(0, 0, 0, 0.03);
  border: 1px solid var(--color-border-light);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--font-size-sm);
  display: table;
}

thead {
  border-bottom: 2px solid var(--color-border-light);
}

th {
  background-color: var(--color-surface-hover);
  color: var(--color-text-heading);
  font-family: var(--font-family);
  font-weight: var(--font-weight-semibold, 600);
  font-size: var(--font-size-caption);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wider);
  text-align: left;
  padding: 0.75rem 1rem;
  border: none;
  white-space: nowrap;
}

td {
  background-color: transparent;
  color: var(--color-text);
  font-family: var(--font-family);
  padding: 0.875rem 1rem;
  border: none;
  border-bottom: 1px solid var(--color-course-border);
  transition: background-color 0.15s ease;
}

tr:last-child td {
  border-bottom: none;
}

tr:nth-child(even) td {
  background-color: rgba(0, 0, 0, 0.015);
}

tr:hover td {
  background-color: var(--color-main-10);
}

/* Responsive: stack table on small screens */
@media (max-width: 640px) {
  table {
    display: block;
  }
  
  thead {
    display: none;
  }
  
  tbody, tr, td {
    display: block;
  }
  
  tr {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border-light);
  }
  
  tr:last-child {
    border-bottom: none;
  }
  
  td {
    padding: 0.25rem 0;
    border: none;
    font-size: var(--font-size-sm);
  }
  
  td::before {
    content: attr(data-label);
    display: block;
    font-size: var(--font-size-caption);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    margin-bottom: 0.15rem;
  }
  
  tr:nth-child(even) td {
    background-color: transparent;
  }
  
  tr:nth-child(even) {
    background-color: rgba(0, 0, 0, 0.015);
    border-radius: 8px;
  }
}

/* ═══ DoDont Component ═══ */
.dodont {
  margin-bottom: var(--spacing-lg);
}

.dodont-col {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: 8px;
  padding: 1.25rem;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.dodont-col.dont { border-left: 3px solid var(--color-error); }
.dodont-col.do { border-left: 3px solid var(--color-success); }

.dodont-header {
  font-size: var(--font-size-caption);
  text-transform: uppercase;
  letter-spacing: 0.15em;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.dodont-col.dont .dodont-header { color: var(--color-error); }
.dodont-col.do .dodont-header { color: var(--color-success); }

.dodont-bubble {
  padding: 0.65rem 1rem;
  border-radius: 16px;
  margin-bottom: 0.5rem;
  font-size: var(--font-size-sm);
  max-width: 90%;
  border-bottom-left-radius: 4px;
}

.dodont-col.dont .dodont-bubble {
  background: var(--color-error-bg);
  border: 1px solid rgba(214, 69, 69, 0.15);
}

.dodont-col.do .dodont-bubble {
  background: var(--color-success-bg);
  border: 1px solid rgba(22, 163, 74, 0.15);
}

.dodont-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  padding: 0.5rem 0;
  font-size: var(--font-size-sm);
  border-bottom: 1px solid var(--color-border-light);
}

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

.dodont-icon {
  flex-shrink: 0;
  font-size: var(--font-size-caption);
  margin-top: 0.15rem;
}

.dodont-col.dont .dodont-icon { color: var(--color-error); }
.dodont-col.do .dodont-icon { color: var(--color-success); }

/* ═══ PlatformCards Component ═══ */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: var(--spacing-lg);
}

@media (max-width: 640px) {
  .platform-grid { grid-template-columns: 1fr; }
}

.platform-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md, 12px);
  padding: 1.25rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.platform-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.platform-card .platform-icon {
  font-size: var(--font-size-title);
  margin-bottom: 0.5rem;
}

.platform-card .platform-name {
  font-weight: 600;
  font-size: var(--font-size-base);
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.platform-card .platform-attr {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.35rem 0;
  border-top: 1px solid var(--color-border-light);
  font-size: var(--font-size-sm);
}

.platform-card .platform-attr-label { color: var(--color-text-muted); }
.platform-card .platform-attr-value { color: var(--color-text-secondary); }

/* ═══ ScenarioAction Component ═══ */
.scenario-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: var(--spacing-lg);
}

.scenario-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md, 12px);
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.scenario-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  cursor: pointer;
  transition: background-color 0.15s ease;
}

.scenario-header:hover {
  background-color: var(--color-surface-hover);
}

.scenario-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.scenario-dot.green { background: var(--color-success); box-shadow: 0 0 6px rgba(22, 163, 74, 0.3); }
.scenario-dot.yellow { background: var(--color-warning); box-shadow: 0 0 6px rgba(202, 138, 4, 0.3); }
.scenario-dot.red { background: var(--color-error); box-shadow: 0 0 6px rgba(214, 69, 69, 0.3); }

.scenario-text { flex: 1; font-size: var(--font-size-sm); }

.scenario-chevron {
  color: var(--color-text-muted);
  transition: transform 0.3s ease;
  font-size: var(--font-size-caption);
}

.scenario-item[open] .scenario-chevron { transform: rotate(90deg); }

.scenario-body {
  padding: 0 1.25rem 1rem 2.5rem;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.scenario-body strong {
  color: var(--color-text);
  font-weight: 600;
}

/* ═══ ToolkitGrid Component ═══ */
.toolkit-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: var(--spacing-lg);
}

@media (max-width: 640px) {
  .toolkit-grid { grid-template-columns: repeat(2, 1fr); }
}

.toolkit-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md, 12px);
  padding: 1.25rem 1rem;
  text-align: center;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  cursor: pointer;
  text-decoration: none;
  color: inherit;
  display: block;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.toolkit-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  text-decoration: none;
}

.toolkit-item .tk-icon {
  font-size: var(--font-size-subhead);
  margin-bottom: 0.5rem;
}

.toolkit-item .tk-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--color-main);
  color: var(--color-text-inverse);
  font-size: var(--font-size-caption);
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.toolkit-item .tk-title {
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: 0.25rem;
  color: var(--color-text);
}

.toolkit-item .tk-meta {
  font-size: var(--font-size-caption);
  color: var(--color-text-muted);
}

/* Links */
a {
  color: var(--color-main);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-main-hover);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

/* Code */
code {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  background-color: var(--color-surface);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
}

pre {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  background-color: var(--color-surface);
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  overflow-x: auto;
}

pre code {
  background-color: transparent;
  padding: 0;
}

/* Form elements */
input,
textarea,
select {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 2px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

/* Radio and checkbox - reset to allow custom styling */
input[type="radio"],
input[type="checkbox"] {
  padding: 0;
  border-radius: 0;
}

/* Course cards - equal height */
.course-card {
  height: 100%;
  border-color: var(--color-border-light) !important;
  padding: 24px !important;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
  cursor: pointer;
}

.course-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-border) !important;
  background-color: var(--color-surface-hover) !important;
}

.course-description {
  flex: 1;
}

/* Lessons card on course detail page */
.lessons-card {
  border-color: var(--color-border-light) !important;
  border-width: 1px !important;
  padding: 24px !important;
}

/* Lesson link hover effect */
.lesson-link,
.quiz-link {
  cursor: pointer;
}

.lesson-link:hover,
.quiz-link:hover {
  border-color: var(--color-border) !important;
  background-color: var(--color-surface-hover) !important;
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

/* Flashcard practice link */
.flashcard-link {
  cursor: pointer;
}

.flashcard-link:hover {
  border-color: var(--color-border) !important;
  background-color: var(--color-surface-hover) !important;
}

/* Lesson info card on lesson detail page */
.lesson-info-card {
  border-color: var(--color-border-light) !important;
}

/* Quiz cards */
.quiz-card {
  border-color: var(--color-border-light) !important;
  border-width: 1px !important;
}

/* Quiz split layout: conversation context + question side by side */
.quiz-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}

@media (min-width: 768px) {
  .quiz-split {
    grid-template-columns: 2fr 3fr;
    align-items: start;
  }
}

.quiz-context {
  display: flex;
  justify-content: center;
  align-items: flex-start;
}

.quiz-context .phone-frame {
  transform: scale(0.85);
  transform-origin: top center;
}

@media (max-width: 767px) {
  .quiz-context .phone-frame {
    transform: scale(0.75);
    transform-origin: top center;
  }

  .quiz-context {
    max-height: 350px;
    overflow-y: auto;
  }
}

.quiz-question-area {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

/* Quiz question number label */
.quiz-question-number {
  font-family: var(--font-family);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: var(--font-weight-medium);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Quiz question context text */
.quiz-question-context {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* Quiz option cards (single & multiple choice) */
.quiz-options {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  border: none;
  padding: 0;
  margin: 0;
}

.quiz-option-card {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md) var(--spacing-lg);
  border: 2px solid var(--color-border-light);
  border-radius: 12px;
  background-color: var(--color-surface);
  cursor: pointer;
  transition: border-color 0.2s, background-color 0.2s, box-shadow 0.2s, transform 0.15s;
  position: relative;
}

.quiz-option-card:hover {
  border-color: var(--color-border);
  background-color: var(--color-surface-hover);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  transform: translateY(-1px);
}

.quiz-option-card--selected {
  border-color: var(--color-accent, var(--color-main));
  background-color: var(--color-surface-hover);
  box-shadow: 0 0 0 1px var(--color-accent, var(--color-main));
}

.quiz-option-card--selected:hover {
  border-color: var(--color-accent, var(--color-main));
}

.quiz-option-text {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  line-height: 1.5;
}

/* Quiz radio button */
.quiz-radio {
  appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-radius: 50%;
  background-color: var(--color-surface);
  cursor: pointer;
  transition: border-color 0.2s, background-color 0.2s;
  flex-shrink: 0;
}

.quiz-radio:checked {
  border-color: var(--color-accent, var(--color-main));
  background-color: var(--color-accent, var(--color-main));
  box-shadow: inset 0 0 0 3px var(--color-surface);
}

/* Quiz checkbox */
.quiz-checkbox {
  appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--color-border);
  border-radius: 6px;
  background-color: var(--color-surface);
  cursor: pointer;
  transition: border-color 0.2s, background-color 0.2s;
  flex-shrink: 0;
  position: relative;
}

.quiz-checkbox:checked {
  border-color: var(--color-accent, var(--color-main));
  background-color: var(--color-accent, var(--color-main));
  background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 16 16' fill='white' xmlns='http://www.w3.org/2000/svg'%3e%3cpath d='M12.207 4.793a1 1 0 010 1.414l-5 5a1 1 0 01-1.414 0l-2-2a1 1 0 011.414-1.414L6.5 9.086l4.293-4.293a1 1 0 011.414 0z'/%3e%3c/svg%3e");
  background-size: 100% 100%;
  background-position: center;
  background-repeat: no-repeat;
}

/* Quiz navigation buttons */
.quiz-navigation {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-border-light);
  margin-top: var(--spacing-md);
}

.quiz-nav-btn {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  padding: var(--spacing-sm) var(--spacing-xl);
  border-radius: 12px;
  cursor: pointer;
  transition: background-color 0.2s, color 0.2s, box-shadow 0.2s, transform 0.15s;
  min-width: 140px;
  text-align: center;
}

.quiz-nav-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
}

.quiz-nav-btn--prev {
  border: 2px solid var(--color-border);
  background-color: transparent;
  color: var(--color-text);
}

.quiz-nav-btn--prev:hover:not(:disabled) {
  background-color: var(--color-surface-hover);
  border-color: var(--color-border);
  transform: translateY(-1px);
}

.quiz-nav-btn--next {
  border: none;
  background-color: var(--color-main);
  color: var(--color-text-inverse);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.quiz-nav-btn--next:hover:not(:disabled) {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  transform: translateY(-1px);
}

/* Quiz header */
.quiz-header {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

/* Quiz results page */
.quiz-results {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
  max-width: 800px;
  margin: 0 auto;
}

/* Quiz score display */
.quiz-score-display {
  font-family: var(--font-family);
  font-size: 4rem;
  font-weight: var(--font-weight-bold);
  color: var(--color-main);
  text-align: center;
  line-height: 1;
  padding: var(--spacing-md) 0;
}

/* Quiz answer summary items */
.quiz-summary-item {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--color-border-light);
  transition: background-color 0.15s;
}

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

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

.quiz-answer-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

/* Quiz container */
.quiz-container {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  max-width: 800px;
  margin: 0 auto;
}

/* Quiz dialogue bubbles */
.quiz-dialogue {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) 0;
}

.quiz-dialogue-line {
  display: flex;
  flex-direction: column;
  gap: 2px;
  max-width: 80%;
}

.quiz-dialogue-line--user {
  align-self: flex-end;
  align-items: flex-end;
}

.quiz-dialogue-line--match {
  align-self: flex-start;
  align-items: flex-start;
}

.quiz-dialogue-sender {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-weight: var(--font-weight-medium);
}

.quiz-dialogue-bubble {
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 16px;
  font-size: var(--font-size-sm);
  line-height: 1.4;
}

.quiz-dialogue-line--user .quiz-dialogue-bubble {
  background-color: var(--color-main);
  color: var(--color-text-inverse);
  border-bottom-right-radius: 4px;
}

.quiz-dialogue-line--match .quiz-dialogue-bubble {
  background-color: var(--color-surface-hover);
  color: var(--color-text);
  border-bottom-left-radius: 4px;
}

/* Survey cards */
.survey-card {
  border-color: var(--color-border-light) !important;
  border-width: 1px !important;
}

/* Login card */
.login-card {
  border-color: var(--color-border-light) !important;
  border-width: 1px !important;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
  background-color: var(--color-surface);
}

/* Survey step indicator */
.step-indicator {
  font-size: var(--font-size-sm) !important;
  color: var(--color-main) !important;
}

/* Survey question title - responsive */
.survey-question-title {
  font-size: var(--font-size-xl) !important;
}

@media (max-width: 768px) {
  .survey-question-title {
    font-size: var(--font-size-lg) !important;
  }
}

@media (max-width: 480px) {
  .survey-question-title {
    font-size: var(--font-size-base) !important;
  }
}

/* Quiz slider track */
.slider input[type="range"]::-webkit-slider-runnable-track {
  height: 0.5rem;
  border-radius: 9999px;
}

.slider input[type="range"]::-moz-range-track {
  height: 0.5rem;
  border-radius: 9999px;
}

/* Quiz slider thumb - circle */
.slider input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  background-color: var(--color-surface);
  border: 2px solid var(--color-main);
  cursor: grab;
  margin-top: -0.375rem;
}

.slider input[type="range"]::-webkit-slider-thumb:active {
  cursor: grabbing;
}

.slider input[type="range"]::-moz-range-thumb {
  width: 1.25rem;
  height: 1.25rem;
  border-radius: 50%;
  background-color: var(--color-surface);
  border: 2px solid var(--color-main);
  cursor: grab;
}

.slider input[type="range"]::-moz-range-thumb:active {
  cursor: grabbing;
}

.lesson-title {
  margin-bottom: 0 !important;
}

.badge-duration {
  background-color: var(--color-border) !important;
  color: var(--color-text-inverse) !important;
  border: none !important;
}

/* Section heading - lighter style with Inter */
.heading--section {
  font-family: var(--font-family) !important;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: var(--font-weight-bold) !important;
}

/* Extra top spacing on desktop for content pages */
@media (min-width: 768px) {
  .page-content {
    padding-top: 120px;
  }
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--color-border-focus);
  box-shadow: 0 0 0 3px var(--color-selection);
}

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

/* Selection */
::selection {
  background-color: var(--color-selection);
  color: var(--color-text);
}

/* Focus visible for accessibility */
:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

/* Toggle switch focus indicator */
.toggle-switch:focus {
  box-shadow: 0 0 0 3px var(--color-selection);
}

.toggle-switch:focus:not(:focus-visible) {
  box-shadow: none;
}

.toggle-switch[aria-disabled="true"]:focus {
  box-shadow: none;
}

/* Utility: visually hidden but accessible */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border-width: 0;
}

/* Container */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-md);
  padding-right: var(--spacing-md);
}

/* Main content area */
main {
  min-height: calc(100vh - 200px);
  padding: var(--spacing-lg) 0;
}

/* Landing page: remove main constraints so sections go full-bleed */
main:has([data-testid="dating-landing-page"]) {
  max-width: none !important;
  padding: 0 !important;
}

/* Dark landing page: override html/body background */
html:has([data-landing-theme="dark"]) {
  background-color: var(--ld-bg-body) !important;
  color: var(--ld-text-body) !important;
}

html:has([data-landing-theme="dark"]) body {
  background-color: var(--ld-bg-body) !important;
}

/* ═══════════════════════════════════════
   LANDING PAGE DARK THEME
   Scoped to [data-landing-theme="dark"]
   ═══════════════════════════════════════ */

[data-landing-theme="dark"] {
  background-color: var(--ld-bg-body);
  color: var(--ld-text-body);
  font-family: var(--ld-font-body);
  line-height: 1.6;
  overflow-wrap: break-word;
}

[data-landing-theme="dark"] *,
[data-landing-theme="dark"] *::before,
[data-landing-theme="dark"] *::after {
  border-color: var(--ld-border-subtle);
}

/* ── Landing headings ── */
[data-landing-theme="dark"] h1,
[data-landing-theme="dark"] h2,
[data-landing-theme="dark"] h3,
[data-landing-theme="dark"] h4 {
  font-family: var(--ld-font-heading);
  color: var(--ld-text-primary);
  text-transform: none;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

[data-landing-theme="dark"] h1 {
  font-size: var(--ld-hero-size);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  text-wrap: balance;
}

[data-landing-theme="dark"] h2 {
  font-size: var(--ld-h2-size);
  font-weight: 700;
}

[data-landing-theme="dark"] h3 {
  font-size: var(--ld-h3-size);
  font-weight: 600;
}

[data-landing-theme="dark"] h4 {
  font-size: var(--ld-h4-size);
  font-weight: 600;
}

[data-landing-theme="dark"] p {
  color: var(--ld-text-body);
}

/* ── Landing overline pattern ── */
[data-landing-theme="dark"] .ld-overline {
  font-family: var(--ld-font-body);
  font-size: var(--ld-overline-size);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ld-primary);
  line-height: 1.4;
  margin-bottom: 12px;
}

/* ── Landing sections ── */
[data-landing-theme="dark"] .ld-section {
  padding: var(--ld-section-py) var(--ld-section-px);
}

[data-landing-theme="dark"] .ld-section--body {
  background-color: var(--ld-bg-body);
}

[data-landing-theme="dark"] .ld-section--alt {
  background-color: var(--ld-bg-alt);
}

[data-landing-theme="dark"] .ld-container {
  max-width: var(--ld-max-content);
  margin: 0 auto;
}

[data-landing-theme="dark"] .ld-container--narrow {
  max-width: var(--ld-max-narrow);
  margin: 0 auto;
}

[data-landing-theme="dark"] .ld-container--hero {
  max-width: var(--ld-max-hero);
  margin: 0 auto;
}

/* ── Landing cards ── */
[data-landing-theme="dark"] .ld-card {
  background-color: var(--ld-bg-card);
  border: 1px solid var(--ld-border-card);
  border-radius: var(--ld-radius-md);
  transition: border-color var(--ld-transition-normal);
}

[data-landing-theme="dark"] .ld-card:hover {
  border-color: var(--ld-border-hover);
}

[data-landing-theme="dark"] .ld-card--highlighted {
  border-color: var(--ld-border-highlight);
  box-shadow: var(--ld-glow-highlight);
}

/* ── Landing separator ── */
[data-landing-theme="dark"] .ld-separator {
  height: 1px;
  background: var(--ld-gradient-separator);
  border: none;
}

/* ── Landing buttons ── */
[data-landing-theme="dark"] .ld-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: var(--ld-primary);
  color: var(--ld-text-on-primary);
  font-family: var(--ld-font-body);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1;
  padding: 16px 32px;
  border: none;
  border-radius: var(--ld-radius-md);
  cursor: pointer;
  transition: background-color var(--ld-transition-fast),
              transform var(--ld-transition-fast),
              box-shadow var(--ld-transition-fast);
  min-height: 52px;
}

[data-landing-theme="dark"] .ld-btn-primary:hover {
  background-color: var(--ld-primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--ld-shadow-button-hover);
}

[data-landing-theme="dark"] .ld-btn-primary:active {
  background-color: var(--ld-primary-active);
  transform: translateY(0);
  box-shadow: none;
}

[data-landing-theme="dark"] .ld-btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background-color: transparent;
  color: var(--ld-text-primary);
  font-family: var(--ld-font-body);
  font-size: 16px;
  font-weight: 600;
  line-height: 1;
  padding: 16px 32px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--ld-radius-md);
  cursor: pointer;
  transition: border-color var(--ld-transition-fast),
              background-color var(--ld-transition-fast);
  min-height: 52px;
}

[data-landing-theme="dark"] .ld-btn-secondary:hover {
  border-color: var(--ld-primary);
  background-color: var(--ld-primary-subtle);
}

/* ── Landing animations ── */
@keyframes ld-fade-in-up {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

[data-landing-theme="dark"] .ld-animate {
  animation: ld-fade-in-up 0.6s ease both;
}

@media (prefers-reduced-motion: reduce) {
  [data-landing-theme="dark"] .ld-animate {
    animation: none;
    opacity: 1;
    transform: none;
  }
}


/* Button hover/active states */
.button--primary:not(:disabled):hover {
  background-color: var(--color-main-hover);
}

.button--primary:not(:disabled):active {
  background-color: var(--color-main-active);
}

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

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

.button--cta:not(:disabled):hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(150, 150, 150, 0.45);
}

.button--cta:not(:disabled):active {
  transform: translateY(0);
  box-shadow: 0 2px 12px rgba(150, 150, 150, 0.3);
}

/* Survey question transitions */
@keyframes surveyFadeOut {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-10px);
  }
}

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

.survey-step {
  animation: surveyFadeIn var(--transition-slow) ease forwards;
}

.survey-step--exiting {
  animation: surveyFadeOut var(--transition-slow) ease forwards;
  pointer-events: none;
}

/* Radio button selection animation */
@keyframes radioSelectPop {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.1);
  }
  100% {
    transform: scale(1);
  }
}

.radio-select-animation {
  animation: radioSelectPop 200ms ease-out;
}

/* Card-style radio option selection animation */
@keyframes cardSelectPop {
  0% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.02);
  }
  100% {
    transform: scale(1);
  }
}

.radio-card-select-animation {
  animation: cardSelectPop 200ms ease-out;
}

/* Respect reduced motion preference */
@media (prefers-reduced-motion: reduce) {
  .survey-step,
  .survey-step--exiting {
    animation: none;
  }

  .radio-select-animation,
  .radio-card-select-animation {
    animation: none;
  }
}

/* Survey option card hover */
.survey-option-card:hover {
  background-color: var(--color-surface-hover) !important;
  border-color: var(--color-border) !important;
}

.survey-option-card:hover .survey-option-radio,
.survey-option-card:hover input[type="checkbox"] {
  border-color: var(--color-border) !important;
}

/* ═══════════════════════════════════════
   MOBILE NAVIGATION
   ═══════════════════════════════════════ */

/* ═══════════════════════════════════════
   HEADER — Redesign #458
   ═══════════════════════════════════════ */

.header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 32px;
  height: var(--header-height);
  background-color: var(--color-background);
  position: sticky;
  top: 0;
  z-index: calc(var(--z-sidebar, 300) + 10);
  border-bottom: 1px solid var(--color-border-light);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.header--hidden {
  transform: translateY(-100%);
}

.header__left {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.header__logo {
  font-family: var(--font-family);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-heading);
  text-decoration: none;
  letter-spacing: -0.3px;
  flex-shrink: 0;
}

.header__right {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  flex-shrink: 0;
}

/* Nav links — desktop only */
.header__nav-desktop {
  display: none;
  gap: var(--spacing-lg);
}

.header__nav-desktop a {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.header__nav-desktop a:hover {
  color: var(--color-text);
}

.header__nav-desktop a.active {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
}

/* UserPill */
.user-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  background: var(--color-bg-page);
  border: 1px solid var(--color-border-light);
  border-radius: 20px;
  padding: 5px 14px 5px 8px;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.user-pill:hover {
  border-color: var(--color-border);
}

.user-pill__avatar {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-border-light);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
}

.user-pill__name {
  max-width: 120px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Desktop: show nav, hide hamburger (≥1024px) */
@media (min-width: 1024px) {
  .header__nav-desktop {
    display: flex !important;
  }

  .mobile-menu-button {
    display: none !important;
  }
}

/* Mobile: hide nav, show hamburger (<1024px) */
@media (max-width: 1023px) {
  .header__nav-desktop {
    display: none !important;
  }

  .mobile-menu-button {
    display: flex !important;
  }
}

/* Mobile padding (<768px) */
@media (max-width: 768px) {
  .header {
    padding-left: var(--spacing-md) !important;
    padding-right: var(--spacing-md) !important;
  }
}

/* Mobile menu button hover state */
.mobile-menu-button:hover {
  background-color: var(--color-surface-hover);
}

/* Mobile menu link hover state */
[data-testid="mobile-menu-nav"] a:hover {
  background-color: var(--color-surface-hover);
}

/* Mobile menu close button hover state */
[data-testid="mobile-menu-close"]:hover {
  background-color: var(--color-surface-hover);
  color: var(--color-text);
}

/* ═══════════════════════════════════════
   SKELETON LOADING
   ═══════════════════════════════════════ */

@keyframes skeleton-shimmer {
  0% {
    background-position: -200% 0;
  }
  100% {
    background-position: 200% 0;
  }
}

.skeleton {
  background: linear-gradient(
    90deg,
    var(--color-border-light) 25%,
    var(--color-surface) 50%,
    var(--color-border-light) 75%
  );
  background-size: 200% 100%;
  animation: skeleton-shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

/* Respect reduced motion preference for skeleton */
@media (prefers-reduced-motion: reduce) {
  .skeleton {
    animation: none;
    background: var(--color-border-light);
  }
}