/* ========================================
   LongRunLogic — Global Styles
   ======================================== */

/* CSS Variables */
:root {
    color-scheme: light;
    background: var(--color-bg);
    color: var(--color-text);
  /* Colors - Refined palette */
  --color-bg: #fafbfa;
  --color-surface: #ffffff;
  --color-text: #2d2d2d;
  --color-text-muted: #5f6d68;
  --color-accent: #4a7c6f;
  --color-accent-light: #5a9485;
  --color-accent-hover: #3d6960;
  --color-accent-subtle: rgba(74, 124, 111, 0.08);
  --color-border: #e2e8e5;
  --color-input-bg: #f5f7f6;
  --color-result-bg: #eef5f2;
  
  /* Gradient */
  --gradient-accent: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
  
  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.5rem;
  
  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  
  /* Layout */
  --max-width: 1000px;
  --border-radius: 8px;
  --border-radius-sm: 4px;
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
}

/* Skip to Content (Accessibility) */
.skip-to-content {
  position: absolute;
  top: -100px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-accent);
  color: white;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--border-radius);
  font-weight: 500;
  z-index: 1000;
  transition: top var(--transition-fast);
}

.skip-to-content:focus {
  top: var(--space-md);
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  text-decoration: none;
  color: white;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  min-height: 100vh;
  /* Green accent gradient with topo overlay */
  background:
    linear-gradient(135deg, rgba(74,124,111,0.18) 0%, rgba(90,148,133,0.18) 100%),
    var(--gradient-accent),
    url('../assets/topo-pattern.svg');
  background-blend-mode: lighten, normal;
  background-repeat: repeat;
  background-size: 200px 200px, cover, 200px 200px;
}

/* Typography */
h1, h2, h3, h4 {
  line-height: 1.3;
  font-weight: 600;
}

h1 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-md);
}

h2 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-md);
}

h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-sm);
}

p {
  margin-bottom: var(--space-md);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* Layout */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-lg);
  background: rgba(255,255,255,0.92);
  border-radius: var(--border-radius);
  box-shadow: 0 2px 12px rgba(74,124,111,0.10), 0 1.5px 8px rgba(0,0,0,0.04);
}

.page {
  padding-top: var(--space-xl);
  padding-bottom: var(--space-3xl);
}

/* Header */
.site-header {
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface);
}

.site-header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 0;
  padding-bottom: 0;
}

.site-logo {
  display: flex;
  align-items: center;
  font-size: var(--font-size-lg);
  font-weight: 600;
  text-decoration: none;
  letter-spacing: -0.3px;
}

.site-logo-accent {
  color: var(--color-accent);
}

.site-logo-dark {
  color: var(--color-text);
}

.site-logo:hover {
  text-decoration: none;
}

.site-logo:hover .site-logo-dark {
  color: var(--color-accent);
}

.site-nav {
  display: flex;
  gap: var(--space-lg);
}

.site-nav a {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.site-nav a:hover {
  color: var(--color-accent);
}

/* Unit Toggle */
.unit-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.unit-toggle-btn {
  background: var(--color-input-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  padding: var(--space-xs) var(--space-sm);
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.unit-toggle-btn:hover {
  border-color: var(--color-accent);
}

.unit-toggle-btn.active {
  background: var(--color-accent);
  color: white;
  border-color: var(--color-accent);
}

/* Page Header */
.page-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
}

.page-header h1 {
  margin-bottom: var(--space-sm);
}

.page-subtitle {
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  max-width: 480px;
  margin: 0 auto;
}

/* Calculator Card */
.calculator-card {
  background: rgba(255,255,255,0.96);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
  box-shadow: 0 2px 12px rgba(74,124,111,0.10), 0 1.5px 8px rgba(0,0,0,0.04);
  border: 1px solid var(--color-border);
}

/* Form Elements */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-sm);
}

.form-hint {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  font-weight: 400;
  margin-left: var(--space-xs);
}

.form-select,
.form-input {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-size: var(--font-size-base);
  font-family: inherit;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-sm);
  background: var(--color-input-bg);
  color: var(--color-text);
  transition: border-color var(--transition-fast);
}

.form-select:focus,
.form-input:focus {
  outline: none;
  border-color: var(--color-accent);
  background: var(--color-surface);
}

/* Slider + Input Sync */
.slider-group {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.slider-input {
  flex: 1;
  -webkit-appearance: none;
  appearance: none;
  height: 6px;
  background: var(--color-border);
  border-radius: 3px;
  cursor: pointer;
}

.slider-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  background: var(--color-accent);
  border-radius: 50%;
  cursor: pointer;
  transition: transform var(--transition-fast);
}

.slider-input::-webkit-slider-thumb:hover {
  transform: scale(1.1);
}

.slider-input::-moz-range-thumb {
  width: 18px;
  height: 18px;
  background: var(--color-accent);
  border-radius: 50%;
  cursor: pointer;
  border: none;
}

.slider-value {
  min-width: 80px;
}

.slider-value .form-input {
  text-align: center;
  padding: var(--space-sm);
}

/* Pace Input */
.pace-input-group {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.pace-input {
  width: 70px;
  text-align: center;
  padding-left: var(--space-sm);
  padding-right: var(--space-sm);
}

.pace-separator {
  color: var(--color-text-muted);
  font-weight: 500;
}

.pace-unit {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin-left: var(--space-xs);
}

/* Optional Section (Collapsible) */
.optional-section {
  border-top: 1px solid var(--color-border);
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
}

.optional-toggle {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  background: none;
  border: none;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  cursor: pointer;
  padding: 0;
  transition: color var(--transition-fast);
}

.optional-toggle:hover {
  color: var(--color-accent);
}

.optional-toggle-icon {
  transition: transform var(--transition-base);
}

.optional-toggle.expanded .optional-toggle-icon {
  transform: rotate(180deg);
}

.optional-content {
  display: none;
  padding-top: var(--space-lg);
}

.optional-content.visible {
  display: block;
}

/* Calculate Button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-base);
  font-weight: 500;
  font-family: inherit;
  border: none;
  border-radius: var(--border-radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-primary {
  width: 100%;
  background: var(--gradient-accent);
  color: white;
  box-shadow: 0 2px 4px rgba(74, 124, 111, 0.2);
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
  box-shadow: 0 4px 8px rgba(74, 124, 111, 0.25);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(1px);
}

/* Results Section */
.results-section {
  display: none;
  margin-top: var(--space-xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.results-section.visible {
  display: block;
}

.results-card {
  background: var(--color-result-bg);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
  text-align: center;
}

.results-label {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.results-primary {
  font-size: var(--font-size-3xl);
  font-weight: 600;
  color: var(--color-accent);
  line-height: 1.2;
}

.results-secondary {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  margin-top: var(--space-sm);
}

.results-context {
  margin-top: var(--space-lg);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  text-align: left;
}

.results-context h3 {
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.results-context p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* Risk Band Section */
.risk-band-section {
  margin-top: var(--space-lg);
  padding: var(--space-lg);
  background: var(--color-surface);
  border-radius: var(--border-radius);
  border: 1px solid var(--color-border);
}

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

.risk-band-header h3 {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: var(--font-size-sm);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin: 0;
}

.risk-band-percentage {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--color-accent);
  margin: 0;
}

.risk-band-bar-container {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xs);
}

.risk-band-bar {
  position: relative;
  display: flex;
  flex: 1;
  height: 24px;
  border-radius: 12px;
  overflow: hidden;
}

.risk-band-tooltip {
  flex-shrink: 0;
}

.risk-band-zone {
  flex: 1;
  position: relative;
}

.risk-band-green { background: #4ade80; }
.risk-band-yellow { background: #facc15; }
.risk-band-red { background: #f87171; }

.risk-band-marker {
  position: absolute;
  top: -4px;
  width: 4px;
  height: 32px;
  background: var(--color-text);
  border-radius: 2px;
  transform: translateX(-50%);
  transition: left 0.3s ease;
  box-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.risk-band-labels {
  display: flex;
  justify-content: space-between;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.risk-band-labels span {
  flex: 1;
  text-align: center;
  line-height: 1.3;
}

.risk-band-labels small {
  font-size: 0.85em;
  opacity: 0.8;
}

.risk-band-description {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: 0;
  padding-top: var(--space-sm);
  border-top: 1px solid var(--color-border);
}

/* Tooltip */
.tooltip-trigger {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  padding: 0;
  background: transparent;
  border: none;
  color: var(--color-text-muted);
  cursor: help;
}

.tooltip-trigger:hover {
  color: var(--color-accent);
}

.tooltip-content {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  width: 280px;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-text);
  color: white;
  font-size: var(--font-size-xs);
  font-weight: 400;
  text-transform: none;
  letter-spacing: normal;
  line-height: 1.5;
  border-radius: var(--border-radius);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s, visibility 0.2s;
  z-index: 100;
  pointer-events: none;
}

.tooltip-content::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--color-text);
}

.tooltip-trigger:hover .tooltip-content,
.tooltip-trigger:focus .tooltip-content {
  opacity: 1;
  visibility: visible;
}

/* High Percentage Warning */
.high-percentage-warning {
  display: none;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  padding: var(--space-md);
  background: #fef2f2;
  border: 1px solid #ef4444;
  border-radius: var(--border-radius);
  color: #991b1b;
}

.high-percentage-warning.visible {
  display: flex;
}

.high-percentage-warning svg {
  flex-shrink: 0;
  color: #ef4444;
}

.high-percentage-warning > div {
  flex: 1;
}

.high-percentage-warning p {
  margin: 0;
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

/* Frequency Warning */
.frequency-warning {
  display: none;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  padding: var(--space-md);
  background: #fef3c7;
  border: 1px solid #f59e0b;
  border-radius: var(--border-radius);
  color: #92400e;
}

.frequency-warning.visible {
  display: flex;
}

.frequency-warning svg {
  flex-shrink: 0;
  color: #f59e0b;
}

.frequency-warning p {
  margin: 0;
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

/* Marathon Override Notice */
.marathon-override-notice {
  display: none;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  padding: var(--space-md);
  background: #dbeafe;
  border: 1px solid #3b82f6;
  border-radius: var(--border-radius);
  color: #1e40af;
}

.marathon-override-notice.visible {
  display: flex;
}

.marathon-override-notice svg {
  flex-shrink: 0;
  color: #3b82f6;
}

.marathon-override-notice > div {
  flex: 1;
}

.marathon-override-notice p {
  margin: 0;
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

/* Build Mileage Notice */
.build-mileage-notice {
  display: none;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  padding: var(--space-md);
  background: #f0fdf4;
  border: 1px solid #22c55e;
  border-radius: var(--border-radius);
  color: #166534;
}

.build-mileage-notice.visible {
  display: flex;
}

.build-mileage-notice svg {
  flex-shrink: 0;
  color: #22c55e;
}

.build-mileage-notice p {
  margin: 0;
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

/* Inline Tooltip */
.tooltip-inline {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  margin-top: var(--space-xs);
  padding: 0;
  background: none;
  border: none;
  font-size: var(--font-size-xs);
  color: inherit;
  text-decoration: underline;
  cursor: help;
  width: auto;
  height: auto;
}

.tooltip-inline:hover {
  opacity: 0.8;
}

.tooltip-inline .tooltip-content {
  width: 260px;
  bottom: 100%;
  left: 0;
  transform: none;
}

.tooltip-inline .tooltip-content::after {
  left: 20px;
  transform: none;
}

/* Responsible Use Notice */
.responsible-use-notice {
  margin-top: var(--space-lg);
  padding: var(--space-md);
  background: var(--color-surface);
  border-radius: var(--border-radius);
  border-left: 3px solid var(--color-accent);
}

.responsible-use-notice p {
  margin: 0;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* Affiliate Section */
.affiliate-section {
  display: block;
  margin: var(--space-2xl) auto;
  padding: var(--space-lg);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  max-width: 520px;
  box-shadow: 0 2px 12px rgba(74,124,111,0.10), 0 1.5px 8px rgba(0,0,0,0.04);
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  justify-content: center;
}
  flex: 1 1 120px;
  max-width: 150px;
  min-width: 120px;
  background: var(--color-input-bg);
  border-radius: var(--border-radius);
  box-shadow: 0 1px 4px rgba(74,124,111,0.08);
  padding: var(--space-sm);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
  width: 80px;
  height: 80px;
  object-fit: contain;
  border-radius: var(--border-radius-sm);
  margin-bottom: var(--space-xs);
  background: #f5f7f6;
}

.affiliate-section.visible {
  display: block;
}

.affiliate-section h3 {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.affiliate-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.affiliate-link {
  display: inline-block;
  padding: var(--space-sm) var(--space-md);
  background: var(--color-input-bg);
  border-radius: var(--border-radius-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.affiliate-link:hover {
  background: var(--color-accent);
  color: white;
  text-decoration: none;
}

/* Footer */
.site-footer {
  padding: var(--space-xl) 0;
  border-top: 1px solid var(--color-border);
  background: var(--color-surface);
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-md);
}

.footer-links {
  display: flex;
  gap: var(--space-lg);
}

.footer-links a {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.footer-disclaimer {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  max-width: 100%;
}

/* Cross-links */
.cross-links {
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--color-border);
}

.cross-links h2,
.cross-links h3 {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
}

.cross-links-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.cross-link-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md);
  background: var(--color-surface);
  border-radius: var(--border-radius);
  transition: all var(--transition-base);
  border: 1px solid var(--color-border);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.04);
}

.cross-link-item:hover {
  background: var(--color-surface);
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(74, 124, 111, 0.15);
  transform: translateY(-2px);
  text-decoration: none;
}

.cross-link-item span {
  color: var(--color-text);
  transition: color var(--transition-fast);
}

.cross-link-item span:first-child {
  color: var(--color-accent);
}

.cross-link-item:hover span {
  color: var(--color-accent);
}

/* Calculator icon in cross-links */
.cross-link-icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

/* Results Tips List */
.results-tips-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.results-tips-list li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.results-tips-list li:before {
  content: "•";
  position: absolute;
  left: var(--space-sm);
  color: var(--color-accent);
}

.results-tips-list li:last-child {
  margin-bottom: 0;
}

/* Form Helper Text */
.form-helper-text {
  font-size: var(--font-size-xs);
  color: var(--color-accent);
  margin-top: var(--space-sm);
}

/* Position Indicator */
.results-position {
  margin-top: var(--space-lg);
  padding: var(--space-lg);
  background: var(--color-input-bg);
  border-radius: var(--border-radius);
}

.position-bar {
  position: relative;
  height: 8px;
  background: var(--color-border);
  border-radius: 4px;
  margin-bottom: var(--space-md);
}

.position-fill {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--color-accent);
  border-radius: 4px;
  opacity: 0.3;
}

.position-marker {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  background: var(--color-accent);
  border: 3px solid var(--color-surface);
  border-radius: 50%;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.position-labels {
  display: flex;
  justify-content: space-between;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.position-labels span:nth-child(2) {
  font-weight: 500;
  color: var(--color-accent);
}

/* Content Pages (About, Methodology, Disclaimer) */
.content-page {
  max-width: 640px;
  margin: 0 auto;
}

.content-section {
  margin-bottom: var(--space-2xl);
}

.content-section h2 {
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.content-section h3 {
  margin-top: var(--space-lg);
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

.content-section p {
  color: var(--color-text);
  line-height: 1.7;
}

/* About Page Author Section */
.about-author .author-intro {
  display: flex;
  gap: var(--space-xl);
  align-items: flex-start;
}

.author-photo {
  width: 200px;
  height: 260px;
  object-fit: cover;
  object-position: center top;
  border-radius: var(--border-radius);
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.author-bio p:first-child {
  margin-top: 0;
}

@media (max-width: 600px) {
  .about-author .author-intro {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  
  .author-photo {
    width: 180px;
    height: 234px;
  }
}

.content-list {
  list-style: none;
  padding: 0;
  margin: 0 0 var(--space-md) 0;
}

.content-list li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-sm);
  line-height: 1.7;
}

.content-list li:before {
  content: "•";
  position: absolute;
  left: var(--space-sm);
  color: var(--color-accent);
}

/* Article-specific styles */
.article-page {
  max-width: 680px;
}

.article-meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

.article-meta time {
  color: var(--color-text-muted);
}

.article-category {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.article-intro {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  line-height: 1.7;
  border-left: 3px solid var(--color-accent);
  padding-left: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.article-callout {
  background: var(--color-result-bg);
  border-radius: var(--border-radius);
  padding: var(--space-lg);
  margin: var(--space-lg) 0;
}

.article-callout h3 {
  margin-top: 0;
  margin-bottom: var(--space-sm);
  font-size: var(--font-size-base);
}

.article-callout p {
  margin-bottom: 0;
}

.article-callout .content-list {
  margin-bottom: 0;
}

.article-callout .content-list li:last-child {
  margin-bottom: 0;
}

.article-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  font-size: var(--font-size-sm);
}

.article-table th,
.article-table td {
  padding: var(--space-sm) var(--space-md);
  text-align: left;
  border-bottom: 1px solid var(--color-border);
}

.article-table th {
  background: var(--color-input-bg);
  font-weight: 500;
}

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

.article-cta {
  background: var(--color-surface);
  border: 2px solid var(--color-accent);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
  margin: var(--space-xl) 0;
  text-align: center;
}

.article-cta h3 {
  margin-top: 0;
  color: var(--color-accent);
}

.article-cta p {
  margin-bottom: var(--space-md);
}

.article-cta .btn {
  display: inline-flex;
}

/* FAQ Section */
.faq-section {
  background: var(--color-input-bg);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
  margin-top: var(--space-2xl);
}

.faq-section h2 {
  margin-top: 0;
  border-bottom: none;
  padding-bottom: 0;
}

.faq-item {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.faq-item:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.faq-item h3 {
  font-size: var(--font-size-base);
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.faq-item p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: 0;
  line-height: 1.6;
}

/* Articles List */
.articles-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-bottom: var(--space-2xl);
}

.article-card {
  background: var(--color-surface);
  border-radius: var(--border-radius);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
  overflow: hidden;
  transition: box-shadow var(--transition-base);
}

.article-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.article-card-link {
  display: block;
  padding: var(--space-xl);
  text-decoration: none;
}

.article-card-link:hover {
  text-decoration: none;
}

.article-card-category {
  display: inline-block;
  font-size: var(--font-size-xs);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
}

.article-card-title {
  font-size: var(--font-size-xl);
  color: var(--color-text);
  margin-bottom: var(--space-sm);
  line-height: 1.3;
}

.article-card-excerpt {
  font-size: var(--font-size-base);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-md);
}

.article-card-cta {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  font-weight: 500;
}

/* ========================================
   Gear Page
   ======================================== */

.affiliate-notice {
  background: var(--color-accent-subtle);
  border-left: 3px solid var(--color-accent);
  padding: var(--space-md) var(--space-lg);
  margin-bottom: var(--space-2xl);
  border-radius: var(--border-radius-sm);
}

.affiliate-notice p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin: 0;
  line-height: 1.6;
}

.gear-section {
  margin-bottom: var(--space-3xl);
}

.gear-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
  margin-top: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.gear-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

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

.gear-card-content {
  padding: var(--space-lg);
}

.gear-card h4 {
  font-size: var(--font-size-lg);
  color: var(--color-text);
  margin-bottom: var(--space-xs);
}

.gear-category {
  display: inline-block;
  font-size: var(--font-size-xs);
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-sm);
  font-weight: 500;
}

.gear-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  margin-bottom: var(--space-sm);
}

.gear-price {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.gear-link {
  display: inline-block;
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  font-weight: 500;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.gear-link:hover {
  color: var(--color-accent-hover);
  text-decoration: underline;
}

/* ========================================
   Animations
   ======================================== */

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

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

/* Results animation */
.results-section.visible {
  animation: fadeInUp 0.4s ease-out;
}

.results-section.visible .results-card {
  animation: fadeIn 0.3s ease-out 0.1s both;
}

.results-section.visible .results-context {
  animation: fadeIn 0.3s ease-out 0.2s both;
}

.affiliate-section.visible {
  animation: fadeIn 0.3s ease-out 0.3s both;
}

/* ========================================
   Focus States (Accessibility)
   ======================================== */

/* Global focus outline */
:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

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

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

/* Form element focus */
.form-select:focus-visible,
.form-input:focus-visible {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(74, 124, 111, 0.15);
}

/* Button focus */
.btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(74, 124, 111, 0.3);
}

.unit-toggle-btn:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(74, 124, 111, 0.3);
}

/* Link focus */
a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: 2px;
}

/* Slider focus */
.slider-input:focus-visible {
  outline: none;
}

.slider-input:focus-visible::-webkit-slider-thumb {
  box-shadow: 0 0 0 3px rgba(74, 124, 111, 0.3);
}

/* Cross-link focus */
.cross-link-item:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(74, 124, 111, 0.2);
}

/* ========================================
   Button States
   ======================================== */

.btn-primary {
  position: relative;
  overflow: hidden;
}

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.btn-primary.loading {
  color: transparent;
  pointer-events: none;
}

.btn-primary.loading::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 20px;
  height: 20px;
  margin: -10px 0 0 -10px;
  border: 2px solid transparent;
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

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

/* ========================================
   404 Error Page
   ======================================== */

.error-page {
  text-align: center;
  padding: var(--space-2xl) 0;
}

.error-code {
  font-size: 6rem;
  font-weight: 600;
  color: var(--color-border);
  line-height: 1;
  margin-bottom: var(--space-md);
}

.error-page h1 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-sm);
}

.error-message {
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-xl);
}

.error-actions {
  margin-bottom: var(--space-2xl);
}

.error-actions .btn {
  display: inline-flex;
}

.error-links {
  max-width: 400px;
  margin: 0 auto;
  text-align: left;
}

.error-links h2 {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-md);
  text-align: center;
}

/* Mobile Responsive */
@media (max-width: 640px) {
  :root {
    --font-size-2xl: 1.75rem;
    --font-size-3xl: 2rem;
  }
  
  .container {
    padding: var(--space-md);
  }
  
  .site-header .container {
    flex-direction: row;
    justify-content: space-between;
  }
  
  /* Mobile Navigation */
  .site-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: var(--color-surface);
    flex-direction: column;
    padding: var(--space-3xl) var(--space-xl) var(--space-xl);
    gap: var(--space-sm);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.1);
    transition: right var(--transition-base);
    z-index: 1000;
  }
  
  .site-nav.is-open {
    right: 0;
  }
  
  .site-nav a {
    font-size: var(--font-size-lg);
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-border);
  }
  
  .site-nav a:last-child {
    border-bottom: none;
  }
  
  /* Hamburger Button */
  .nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1001;
  }
  
  .nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition-fast);
  }
  
  .nav-toggle.is-open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .nav-toggle.is-open span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.is-open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
  
  /* Mobile Nav Overlay */
  .nav-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
  }
  
  .nav-overlay.is-visible {
    opacity: 1;
    visibility: visible;
  }
  
  .calculator-card {
    padding: var(--space-lg);
  }
  
  .footer-content {
    flex-direction: column;
    text-align: center;
  }
  
  .pace-input-group {
    flex-wrap: wrap;
  }
  
  .cross-links-list {
    gap: var(--space-md);
  }
}

/* Hide hamburger on desktop */
.nav-toggle {
  display: none;
}

.nav-overlay {
  display: none;
}

@media (max-width: 640px) {
  .nav-toggle {
    display: flex;
  }
  
  .nav-overlay {
    display: block;
  }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mb-0 { margin-bottom: 0; }
/* ========================================
   Homepage Hero & Trust Signals
   ======================================== */

.homepage-hero {
  margin-bottom: var(--space-2xl);
}

.homepage-hero h1 {
  font-size: var(--font-size-3xl);
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

.trust-signals {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md) var(--space-lg);
  margin-top: var(--space-lg);
}

.trust-signal {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* ========================================
   How To Use Section
   ======================================== */

.how-to-use {
  background: var(--color-surface);
  border-radius: var(--border-radius);
  padding: var(--space-xl);
  margin-top: var(--space-2xl);
  border: 1px solid var(--color-border);
}

.how-to-use h2 {
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-lg);
  text-align: center;
}

.how-to-steps {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-bottom: var(--space-lg);
}

.how-to-step {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  min-width: 32px;
  background: var(--color-accent);
  color: white;
  border-radius: 50%;
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.how-to-step strong {
  display: block;
  margin-bottom: var(--space-xs);
}

.how-to-step p {
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
  margin: 0;
  line-height: 1.5;
}

.how-to-note {
  text-align: center;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
  margin: 0;
}

.how-to-note a {
  color: var(--color-accent);
  text-decoration: none;
}

.how-to-note a:hover {
  text-decoration: underline;
}

@media (max-width: 640px) {
  .homepage-hero h1 {
    font-size: var(--font-size-2xl);
  }
  
  .trust-signals {
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
  }
}

/* ========================================
   Article Calculator CTA Box
   ======================================== */

.article-calculator-cta {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
  border-radius: var(--border-radius);
  padding: var(--space-lg);
  margin: var(--space-xl) 0;
  text-align: center;
  color: white;
}

.article-calculator-cta h3 {
  margin: 0 0 var(--space-sm) 0;
  font-size: var(--font-size-lg);
  color: white;
}

.article-calculator-cta p {
  margin: 0 0 var(--space-md) 0;
  opacity: 0.9;
  font-size: var(--font-size-sm);
}

.article-calculator-cta .btn {
  background: white;
  color: var(--color-accent);
  font-weight: 600;
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--border-radius-sm);
  text-decoration: none;
  display: inline-block;
  transition: var(--transition-base);
}

.article-calculator-cta .btn:hover {
  background: var(--color-bg);
  transform: translateY(-1px);
}

/* ========================================
   Inline Affiliate Links
   ======================================== */

.affiliate-link {
  color: var(--color-accent);
  text-decoration: underline;
  text-decoration-style: dotted;
  text-underline-offset: 2px;
}

.affiliate-link:hover {
  text-decoration-style: solid;
  color: var(--color-accent-hover);
}

/* ========================================
   Share Results Button
   ======================================== */

.share-results {
  margin-top: var(--space-lg);
  text-align: center;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  background: var(--color-surface);
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  padding: var(--space-sm) var(--space-lg);
  border-radius: var(--border-radius-sm);
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition-base);
}

.btn-secondary:hover {
  background: var(--color-accent-subtle);
}

.btn-secondary.copied {
  background: var(--color-accent);
  color: white;
}

/* ========================================
   Landing Page CTA Card
   ======================================== */

.landing-cta-card {
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
  border-radius: var(--border-radius);
  padding: var(--space-2xl);
  margin-bottom: var(--space-2xl);
  text-align: center;
  color: white;
}

.landing-cta-card h2 {
  color: white;
  margin-bottom: var(--space-sm);
}

.landing-cta-card p {
  opacity: 0.9;
  margin-bottom: var(--space-lg);
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.btn-large {
  padding: var(--space-md) var(--space-xl);
  font-size: var(--font-size-lg);
}

.landing-cta-card .btn-primary {
  background: white;
  color: var(--color-accent);
}

.landing-cta-card .btn-primary:hover {
  background: var(--color-bg);
  transform: translateY(-2px);
}

/* ========================================
   Email Capture CTA
   ======================================== */

.email-capture-cta {
  margin-top: var(--space-xl);
  padding: var(--space-lg);
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-light) 100%);
  border-radius: var(--border-radius);
  text-align: center;
  color: white;
}

.email-capture-cta h3 {
  margin: 0 0 var(--space-sm) 0;
  font-size: var(--font-size-lg);
  color: white;
}

.email-capture-cta > p {
  margin: 0 0 var(--space-md) 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--font-size-sm);
}

.email-capture-form {
  display: flex;
  gap: var(--space-sm);
  max-width: 400px;
  margin: 0 auto;
}

.email-input {
  flex: 1;
  padding: var(--space-sm) var(--space-md);
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--border-radius-sm);
  background: rgba(255, 255, 255, 0.95);
  font-size: var(--font-size-base);
  color: var(--color-text);
}

.email-input:focus {
  outline: none;
  border-color: white;
}

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

.email-capture-form .btn-primary {
  background: white;
  color: var(--color-accent);
  border: none;
  white-space: nowrap;
  font-weight: 600;
}

.email-capture-form .btn-primary:hover {
  background: var(--color-bg);
  transform: translateY(-1px);
}

.email-privacy {
  margin: var(--space-sm) 0 0 0 !important;
  font-size: var(--font-size-xs) !important;
  color: rgba(255, 255, 255, 0.7) !important;
}

/* Email capture success state */
.email-capture-cta.success {
  background: #22c55e;
}

.email-capture-cta.success h3::before {
  content: "✓ ";
}

@media (max-width: 480px) {
  .email-capture-form {
    flex-direction: column;
  }
  
  .email-capture-form .btn-primary {
    width: 100%;
  }
}

/* ========================================
   Mobile Improvements
   ======================================== */

@media (max-width: 640px) {
  .landing-cta-card {
    padding: var(--space-lg);
  }
  
  .btn-large {
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-base);
    width: 100%;
  }
  
  .how-to-step {
    flex-direction: column;
    text-align: center;
  }
  
  .step-number {
    margin: 0 auto var(--space-sm);
  }
  
  .share-results {
    padding-top: var(--space-md);
  }
  
  .btn-secondary {
    width: 100%;
    justify-content: center;
  }
}