/* ===========================================
   Foxfire — CSS Design System
   Single file: tokens → base → layout → components → theme → utilities
   From: workspace/product/design-system.md (Session 4)
   =========================================== */

/* -------------------------------------------
   Design Tokens — Light Theme (Default)
   ------------------------------------------- */
:root {
  /* Surface hierarchy — warm undertones */
  --color-bg-primary: #FEFCF9;
  --color-bg-secondary: #F7F3EE;
  --color-bg-tertiary: #EFEBE4;
  --color-bg-writing: #FFFFFF;

  /* Text hierarchy */
  --color-text-primary: #1A1714;
  --color-text-secondary: #5C564D;
  --color-text-tertiary: #8C857A;
  --color-text-inverse: #FEFCF9;

  /* Brand */
  --color-brand-primary: #C4501A;
  --color-brand-primary-hover: #A8420F;
  --color-brand-primary-subtle: #FFF0E8;
  --color-brand-secondary: #2C5F4A;

  /* Feedback-specific */
  --color-feedback-positive: #2C5F4A;
  --color-feedback-growth: #C4501A;
  --color-feedback-insight: #5B4A8A;

  /* UI elements */
  --color-border: #E2DCD4;
  --color-border-focus: #C4501A;
  --color-border-subtle: #EFEBE4;

  /* Streak & progress */
  --color-streak: #C4501A;
  --color-skill-strong: #C4501A;
  --color-skill-growing: #D4885A;
  --color-skill-developing: #E2DCD4;

  /* Semantic */
  --color-error: #B33D26;
  --color-error-bg: #FFF0EC;
  --color-success: #2C5F4A;
  --color-success-bg: #EDF5F0;

  /* Button states */
  --color-button-primary-bg: #C4501A;
  --color-button-primary-text: #FFFFFF;
  --color-button-primary-hover: #A8420F;
  --color-button-secondary-bg: transparent;
  --color-button-secondary-text: #C4501A;
  --color-button-secondary-border: #C4501A;
  --color-button-disabled-bg: #EFEBE4;
  --color-button-disabled-text: #8C857A;

  /* Typography */
  --font-serif: 'Lora', Georgia, 'Times New Roman', serif;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-md: 1.125rem;
  --text-lg: 1.25rem;
  --text-xl: 1.5rem;
  --text-2xl: 1.875rem;
  --text-3xl: 2.5rem;

  --leading-tight: 1.3;
  --leading-normal: 1.6;
  --leading-relaxed: 1.8;

  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.02em;

  /* Spacing — 4px base */
  --space-0: 0;
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;

  /* Layout */
  --container-narrow: 560px;
  --container-medium: 680px;
  --container-wide: 800px;
  --container-max: 1024px;

  /* Border & Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-full: 9999px;
  --border-width: 1px;
  --border-style: solid;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(26, 23, 20, 0.05);
  --shadow-md: 0 2px 8px rgba(26, 23, 20, 0.08);
  --shadow-focus: 0 0 0 3px rgba(196, 80, 26, 0.2);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 200ms ease;
  --transition-slow: 300ms ease;
}

/* -------------------------------------------
   Dark Theme
   ------------------------------------------- */
[data-theme="dark"] {
  --color-bg-primary: #171411;
  --color-bg-secondary: #221E19;
  --color-bg-tertiary: #2D2822;
  --color-bg-writing: #1C1916;

  --color-text-primary: #E8E2D9;
  --color-text-secondary: #A59E94;
  --color-text-tertiary: #6B645B;
  --color-text-inverse: #171411;

  --color-brand-primary: #D96835;
  --color-brand-primary-hover: #E87D4D;
  --color-brand-primary-subtle: #2D1E14;
  --color-brand-secondary: #4A8F72;

  --color-feedback-positive: #4A8F72;
  --color-feedback-growth: #D96835;
  --color-feedback-insight: #8B78B8;

  --color-border: #2D2822;
  --color-border-focus: #D96835;
  --color-border-subtle: #221E19;

  --color-streak: #D96835;
  --color-skill-strong: #D96835;
  --color-skill-growing: #C4885A;
  --color-skill-developing: #2D2822;

  --color-error: #E05A42;
  --color-error-bg: #2D1A14;
  --color-success: #4A8F72;
  --color-success-bg: #142D20;

  --color-button-primary-bg: #D96835;
  --color-button-primary-text: #171411;
  --color-button-primary-hover: #E87D4D;
  --color-button-secondary-bg: transparent;
  --color-button-secondary-text: #D96835;
  --color-button-secondary-border: #D96835;
  --color-button-disabled-bg: #2D2822;
  --color-button-disabled-text: #6B645B;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-focus: 0 0 0 3px rgba(217, 104, 53, 0.3);
}

/* System preference detection */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg-primary: #171411;
    --color-bg-secondary: #221E19;
    --color-bg-tertiary: #2D2822;
    --color-bg-writing: #1C1916;
    --color-text-primary: #E8E2D9;
    --color-text-secondary: #A59E94;
    --color-text-tertiary: #6B645B;
    --color-text-inverse: #171411;
    --color-brand-primary: #D96835;
    --color-brand-primary-hover: #E87D4D;
    --color-brand-primary-subtle: #2D1E14;
    --color-brand-secondary: #4A8F72;
    --color-feedback-positive: #4A8F72;
    --color-feedback-growth: #D96835;
    --color-feedback-insight: #8B78B8;
    --color-border: #2D2822;
    --color-border-focus: #D96835;
    --color-border-subtle: #221E19;
    --color-streak: #D96835;
    --color-skill-strong: #D96835;
    --color-skill-growing: #C4885A;
    --color-skill-developing: #2D2822;
    --color-error: #E05A42;
    --color-error-bg: #2D1A14;
    --color-success: #4A8F72;
    --color-success-bg: #142D20;
    --color-button-primary-bg: #D96835;
    --color-button-primary-text: #171411;
    --color-button-primary-hover: #E87D4D;
    --color-button-secondary-bg: transparent;
    --color-button-secondary-text: #D96835;
    --color-button-secondary-border: #D96835;
    --color-button-disabled-bg: #2D2822;
    --color-button-disabled-text: #6B645B;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-focus: 0 0 0 3px rgba(217, 104, 53, 0.3);
  }
}

/* -------------------------------------------
   Base Reset & Typography
   ------------------------------------------- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
  background: var(--color-bg-primary);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3 {
  font-family: var(--font-serif);
  line-height: var(--leading-tight);
}

a {
  color: var(--color-brand-primary);
  text-decoration: none;
}

a:hover {
  color: var(--color-brand-primary-hover);
}

img {
  max-width: 100%;
  display: block;
}

/* Focus visible — keyboard navigation only */
:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Minimum touch targets */
button, a, [role="button"] {
  min-height: 44px;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* -------------------------------------------
   Layout Utilities
   ------------------------------------------- */
.container {
  max-width: var(--container-medium);
  margin: 0 auto;
  padding: 0 var(--space-4);
}

.container-narrow {
  max-width: var(--container-narrow);
}

.container-wide {
  max-width: var(--container-wide);
}

.text-center {
  text-align: center;
}

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

/* Pro/Free visibility */
.pro-only { display: none; }
.is-pro .pro-only { display: block; }
.free-only { display: block; }
.is-pro .free-only { display: none; }

[hidden] { display: none !important; }

/* -------------------------------------------
   Keyframe Animations (only 2 in the system)
   ------------------------------------------- */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes dots {
  0%, 20% { content: ''; }
  40% { content: '.'; }
  60% { content: '..'; }
  80%, 100% { content: '...'; }
}

/* -------------------------------------------
   Component: Buttons
   ------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  text-decoration: none;
  line-height: 1;
}

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

.btn-primary:hover {
  background: var(--color-button-primary-hover);
  color: var(--color-button-primary-text);
}

.btn-secondary {
  color: var(--color-button-secondary-text);
  background: var(--color-button-secondary-bg);
  border: var(--border-width) var(--border-style) var(--color-button-secondary-border);
}

.btn-secondary:hover {
  background: var(--color-brand-primary-subtle);
  color: var(--color-button-secondary-text);
}

.btn:focus-visible {
  box-shadow: var(--shadow-focus);
  outline: none;
}

.btn:disabled, .btn.disabled {
  background: var(--color-button-disabled-bg);
  color: var(--color-button-disabled-text);
  cursor: not-allowed;
  border-color: transparent;
}

.btn.loading {
  opacity: 0.7;
  pointer-events: none;
}

/* Submit button — specialized */
.btn-submit {
  display: block;
  width: 100%;
  max-width: 280px;
  margin: var(--space-4) auto 0;
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 500;
  color: var(--color-button-primary-text);
  background: var(--color-button-primary-bg);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast);
}

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

.btn-submit:focus-visible {
  box-shadow: var(--shadow-focus);
  outline: none;
}

.btn-submit:disabled {
  background: var(--color-button-disabled-bg);
  color: var(--color-button-disabled-text);
  cursor: not-allowed;
}

.btn-submit.loading {
  opacity: 0.7;
  pointer-events: none;
}

@media (min-width: 768px) {
  .btn-submit {
    width: auto;
    min-width: 200px;
  }
}

/* -------------------------------------------
   Component: App Header (authenticated)
   ------------------------------------------- */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-bottom: var(--border-width) var(--border-style) var(--color-border-subtle);
  background: var(--color-bg-primary);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-logo {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-brand-primary);
  text-decoration: none;
  min-height: auto;
}

.header-logo:hover {
  color: var(--color-brand-primary-hover);
}

.header-right {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.header-streak {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-streak);
}

.header-avatar {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  object-fit: cover;
  min-height: auto;
}

.header-avatar-link {
  display: flex;
  min-height: auto;
}

.header-avatar-placeholder {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  background: var(--color-bg-tertiary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
}

/* -------------------------------------------
   Component: Landing Page
   ------------------------------------------- */
.landing-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  max-width: var(--container-max);
  margin: 0 auto;
}

.landing-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.landing-nav a {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  min-height: auto;
}

.landing-nav a:hover {
  color: var(--color-text-primary);
}

.landing-nav .btn {
  min-height: 44px;
}

/* Hide nav links on mobile, keep CTA */
@media (max-width: 767px) {
  .landing-nav-link {
    display: none;
  }
}

/* Hero section */
.hero {
  text-align: center;
  padding: var(--space-16) var(--space-4) var(--space-12);
  max-width: var(--container-wide);
  margin: 0 auto;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.hero-subtitle {
  font-family: var(--font-sans);
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
  max-width: 520px;
  margin: 0 auto var(--space-8);
}

.hero .btn {
  font-size: var(--text-md);
  padding: var(--space-4) var(--space-8);
}

/* Example challenge on landing */
.example-challenge {
  max-width: var(--container-narrow);
  margin: var(--space-10) auto 0;
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: left;
}

.example-challenge-label {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-brand-primary);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
  margin-bottom: var(--space-3);
}

.example-challenge-text {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.example-challenge-meta {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* How it works section */
.how-it-works {
  padding: var(--space-16) var(--space-4);
  max-width: var(--container-wide);
  margin: 0 auto;
}

.how-it-works h2 {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-10);
}

.steps-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
}

@media (min-width: 768px) {
  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-8);
  }
}

.step {
  text-align: center;
}

.step-number {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-brand-primary);
  margin-bottom: var(--space-2);
}

.step-title {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.step-desc {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

/* Landing pricing preview */
.pricing-preview {
  padding: var(--space-16) var(--space-4);
  max-width: var(--container-wide);
  margin: 0 auto;
}

.pricing-preview h2 {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--space-10);
}

/* Bottom CTA */
.cta-bottom {
  text-align: center;
  padding: var(--space-16) var(--space-4);
  max-width: var(--container-wide);
  margin: 0 auto;
}

.cta-bottom p {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  color: var(--color-text-primary);
  margin-bottom: var(--space-8);
  line-height: var(--leading-normal);
}

/* Landing footer */
.landing-footer {
  padding: var(--space-6) var(--space-4);
  border-top: var(--border-width) var(--border-style) var(--color-border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-max);
  margin: 0 auto;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

/* -------------------------------------------
   Component: Challenge Card
   ------------------------------------------- */
.challenge-card {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  max-width: var(--container-narrow);
  margin: 0 auto;
  transition: padding var(--transition-normal);
}

.challenge-card.compact {
  padding: var(--space-4);
}

.challenge-card.compact .challenge-prompt {
  font-size: var(--text-base);
  margin-bottom: var(--space-2);
}

.challenge-prompt {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  line-height: var(--leading-relaxed);
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
  transition: font-size var(--transition-normal), margin-bottom var(--transition-normal);
}

.challenge-meta {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.challenge-skill-tag {
  display: inline-block;
  padding: var(--space-1) var(--space-2);
  background: var(--color-brand-primary-subtle);
  color: var(--color-brand-primary);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

.challenge-constraints {
  margin-top: var(--space-3);
  padding-left: var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
}

.challenge-constraints li {
  margin-bottom: var(--space-1);
}

/* -------------------------------------------
   Component: Writing Area
   ------------------------------------------- */
.writing-area {
  max-width: var(--container-narrow);
  margin: var(--space-4) auto 0;
  position: relative;
}

.writing-textarea {
  width: 100%;
  min-height: 200px;
  padding: var(--space-4);
  padding-bottom: var(--space-8);
  font-family: var(--font-serif);
  font-size: var(--text-md);
  line-height: var(--leading-relaxed);
  color: var(--color-text-primary);
  background: var(--color-bg-writing);
  border: var(--border-width) var(--border-style) var(--color-border);
  border-radius: var(--radius-md);
  resize: none;
  outline: none;
  transition: border-color var(--transition-fast);
}

.writing-textarea:focus {
  border-color: var(--color-border-focus);
  box-shadow: var(--shadow-focus);
}

.writing-textarea::placeholder {
  color: var(--color-text-tertiary);
  font-style: italic;
}

.writing-textarea[readonly] {
  background: var(--color-bg-secondary);
  border-color: var(--color-border-subtle);
  opacity: 0.85;
  cursor: default;
}

.word-count {
  position: absolute;
  bottom: var(--space-3);
  right: var(--space-4);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-tertiary);
}

.word-count.target-reached {
  color: var(--color-success);
}

@media (min-width: 768px) {
  .writing-textarea { min-height: 280px; }
}

@media (min-width: 1024px) {
  .writing-textarea { min-height: 320px; }
}

/* -------------------------------------------
   Component: Feedback Card
   ------------------------------------------- */
.feedback-card {
  max-width: var(--container-narrow);
  margin: var(--space-6) auto 0;
  padding: var(--space-6);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--color-brand-primary);
  animation: fadeIn var(--transition-slow);
}

.feedback-header {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
}

.feedback-section {
  margin-bottom: var(--space-4);
}

.feedback-section:last-child {
  margin-bottom: 0;
}

.feedback-label {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-2);
}

.feedback-positive .feedback-label {
  color: var(--color-feedback-positive);
}

.feedback-growth .feedback-label {
  color: var(--color-feedback-growth);
}

.feedback-insight .feedback-label {
  color: var(--color-feedback-insight);
}

.feedback-body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-text-primary);
}

.feedback-skill-focus {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: var(--border-width) var(--border-style) var(--color-border-subtle);
}

/* -------------------------------------------
   Component: Completion State
   ------------------------------------------- */
.completion {
  max-width: var(--container-narrow);
  margin: var(--space-12) auto;
  text-align: center;
}

.completion-message {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.completion-streak {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-8);
}

.upgrade-prompt {
  background: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  text-align: left;
  margin-bottom: var(--space-6);
}

.upgrade-prompt h3 {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-3);
}

.upgrade-prompt ul {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--leading-normal);
  padding-left: var(--space-4);
  margin-bottom: var(--space-4);
}

.completion-footer {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

/* -------------------------------------------
   Component: Loading State
   ------------------------------------------- */
.loading-message {
  max-width: var(--container-narrow);
  margin: var(--space-8) auto;
  text-align: center;
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-text-secondary);
}

.loading-dots::after {
  content: '';
  animation: dots 1.5s steps(4, end) infinite;
}

/* -------------------------------------------
   Component: Pricing Cards
   ------------------------------------------- */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
  max-width: var(--container-wide);
  margin: 0 auto;
}

@media (min-width: 768px) {
  .pricing-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.pricing-card {
  background: var(--color-bg-secondary);
  border: var(--border-width) var(--border-style) var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
}

.pricing-card.featured {
  border-color: var(--color-brand-primary);
  border-width: 2px;
}

.pricing-card-name {
  font-family: var(--font-sans);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-2);
}

.pricing-card-price {
  font-family: var(--font-sans);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.pricing-card-price span {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text-secondary);
}

.pricing-feature-list {
  list-style: none;
  padding: 0;
  margin-bottom: var(--space-6);
}

.pricing-feature-list li {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  padding: var(--space-2) 0;
  padding-left: var(--space-4);
  position: relative;
}

.pricing-feature-list li::before {
  content: "\00B7";
  position: absolute;
  left: 0;
  color: var(--color-brand-primary);
  font-weight: 700;
}

.pricing-anchor {
  text-align: center;
  margin-top: var(--space-8);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  line-height: var(--leading-normal);
}

/* -------------------------------------------
   Component: Skill Map (Progress Dashboard)
   ------------------------------------------- */
.skill-map {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.skill-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-2) 0;
}

.skill-name {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  width: 160px;
  flex-shrink: 0;
  text-align: right;
}

.skill-bar-track {
  flex: 1;
  height: 8px;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.skill-bar-fill {
  height: 100%;
  border-radius: var(--radius-full);
  transition: width var(--transition-slow);
}

.skill-bar-fill.strong { background: var(--color-skill-strong); }
.skill-bar-fill.growing { background: var(--color-skill-growing); }
.skill-bar-fill.developing { background: var(--color-skill-developing); }

.skill-level {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  width: 80px;
}

@media (max-width: 767px) {
  .skill-row {
    flex-wrap: wrap;
  }
  .skill-name {
    width: 100%;
    text-align: left;
    margin-bottom: calc(-1 * var(--space-1));
  }
  .skill-level {
    width: auto;
  }
}

/* -------------------------------------------
   Component: Challenge History List
   ------------------------------------------- */
.challenge-list-item {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  border-bottom: var(--border-width) var(--border-style) var(--color-border-subtle);
  cursor: pointer;
  transition: background var(--transition-fast);
  text-decoration: none;
  color: inherit;
}

.challenge-list-item:first-child {
  border-top: var(--border-width) var(--border-style) var(--color-border-subtle);
}

.challenge-list-item:hover {
  background: var(--color-bg-tertiary);
  color: inherit;
}

.challenge-list-date {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  width: 64px;
  flex-shrink: 0;
}

.challenge-list-skill {
  flex-shrink: 0;
}

.challenge-list-preview {
  flex: 1;
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.challenge-list-chevron {
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

/* -------------------------------------------
   Component: Stats Row (Progress Dashboard)
   ------------------------------------------- */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}

.stat-card {
  text-align: center;
  padding: var(--space-4);
  background: var(--color-bg-secondary);
  border-radius: var(--radius-md);
}

.stat-number {
  font-family: var(--font-sans);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text-primary);
}

.stat-label {
  font-family: var(--font-sans);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  margin-top: var(--space-1);
}

/* -------------------------------------------
   Component: Profile
   ------------------------------------------- */
.profile-section {
  max-width: var(--container-narrow);
  margin: var(--space-8) auto;
}

.profile-header {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}

.profile-avatar {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-full);
  object-fit: cover;
}

.profile-name {
  font-family: var(--font-serif);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text-primary);
}

.profile-email {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

.profile-divider {
  border: none;
  border-top: var(--border-width) var(--border-style) var(--color-border-subtle);
  margin: var(--space-6) 0;
}

.profile-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) 0;
}

.profile-row-label {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  color: var(--color-text-primary);
}

.profile-row-value {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* -------------------------------------------
   Component: Theme Toggle
   ------------------------------------------- */
.theme-toggle {
  display: inline-flex;
  background: var(--color-bg-tertiary);
  border-radius: var(--radius-full);
  padding: 2px;
}

.theme-toggle-option {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  padding: var(--space-1) var(--space-3);
  border: none;
  border-radius: var(--radius-full);
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
  min-height: auto;
}

.theme-toggle-option.active {
  background: var(--color-bg-writing);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-sm);
}

/* -------------------------------------------
   Component: Error State
   ------------------------------------------- */
.error-message {
  max-width: var(--container-narrow);
  margin: var(--space-4) auto;
  padding: var(--space-4);
  background: var(--color-error-bg);
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-error);
}

/* -------------------------------------------
   Page sections
   ------------------------------------------- */
.page-title {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-text-primary);
  margin-bottom: var(--space-6);
}

.page-content {
  padding: var(--space-6) var(--space-4);
  padding-bottom: calc(var(--space-8) + env(safe-area-inset-bottom, 0px));
}

@media (min-width: 768px) {
  .page-content {
    padding: var(--space-8) var(--space-6);
  }
}

@media (min-width: 1024px) {
  .page-content {
    padding: var(--space-10) var(--space-8);
  }
}

/* -------------------------------------------
   View: Challenge screen states
   ------------------------------------------- */
.challenge-view {
  padding: var(--space-6) var(--space-4);
  padding-bottom: calc(var(--space-8) + env(safe-area-inset-bottom, 0px));
}

@media (min-width: 768px) {
  .challenge-view {
    padding: var(--space-8) var(--space-4);
    padding-bottom: var(--space-10);
  }
}

/* Sign-in prompt (when not authed but on app route) */
.auth-prompt {
  max-width: var(--container-narrow);
  margin: var(--space-16) auto;
  text-align: center;
}

.auth-prompt h2 {
  font-family: var(--font-serif);
  font-size: var(--text-2xl);
  margin-bottom: var(--space-4);
}

.auth-prompt p {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

/* Back link */
.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-4);
  min-height: auto;
}

.back-link:hover {
  color: var(--color-text-primary);
}

/* -------------------------------------------
   Component: Header Progress Link
   ------------------------------------------- */
.header-progress-link {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  text-decoration: none;
  min-height: auto;
  transition: color var(--transition-fast);
}

.header-progress-link:hover {
  color: var(--color-brand-primary);
}

/* -------------------------------------------
   Component: Button — Small variant
   ------------------------------------------- */
.btn-small {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  min-height: auto;
}

/* -------------------------------------------
   Component: Completion Upgrade Card
   ------------------------------------------- */
.completion-upgrade-card {
  margin-top: var(--space-8);
  padding: var(--space-6);
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  text-align: center;
}

.completion-upgrade-lead {
  font-family: var(--font-serif);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: var(--space-4);
}

.completion-upgrade-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-6) 0;
  text-align: left;
  max-width: 320px;
  margin-left: auto;
  margin-right: auto;
}

.completion-upgrade-list li {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  padding: var(--space-1) 0;
}

.completion-upgrade-list li::before {
  content: "· ";
  color: var(--color-brand-primary);
  font-weight: 700;
}

.completion-upgrade-footer {
  font-family: var(--font-sans);
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  margin-top: var(--space-4);
}