/* Bitcoin Power Law Observatory - Styles */
/* Design: Minimalist, Stripe/Strike inspired */

:root {
  /* Colors */
  --black: #000000;
  --white: #FFFFFF;
  --orange: #F7931A;
  --green: #00C853;
  --red: #FF1744;
  --gray: #757575;
  --gray-light: #F5F5F5;
  --gray-border: #E0E0E0;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;

  /* Layout */
  --max-width: 1200px;
  --border-radius: 8px;
}

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

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

body {
  font-family: var(--font-family);
  background: var(--white);
  color: var(--black);
  line-height: 1.6;
  min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4 {
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

h2 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-sm);
}

h3 {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
}

p {
  margin-bottom: var(--spacing-sm);
  color: var(--gray);
}

a {
  color: var(--orange);
  text-decoration: none;
  transition: opacity 0.2s;
}

a:hover {
  opacity: 0.8;
}

/* Layout */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* Header */
.header {
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--gray-border);
  position: sticky;
  top: 0;
  background: var(--white);
  z-index: 100;
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--black);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.logo-icon {
  color: var(--orange);
}

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

.nav a {
  color: var(--gray);
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.2s;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: var(--spacing-md);
}

.lang-link {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--gray);
  text-decoration: none;
  padding: 2px 8px;
  border-radius: 4px;
  transition: color 0.2s;
}

.lang-link:hover { color: var(--black); }

.lang-link.active {
  color: var(--black);
  background: var(--gray-light);
}

.nav a:hover,
.nav a.active {
  color: var(--black);
}

/* Main content */
main {
  padding: var(--spacing-xxl) 0;
}

/* Hero section */
.hero {
  text-align: center;
  margin-bottom: var(--spacing-xxl);
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
}

.hero p {
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto;
}

/* Dashboard cards */
.dashboard {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xxl);
}

.card {
  background: var(--white);
  border: 1px solid var(--gray-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  transition: box-shadow 0.2s;
}

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

.card-label {
  font-size: 0.875rem;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--spacing-xs);
}

.card-value {
  font-size: 2rem;
  font-weight: 700;
  color: var(--black);
  margin-bottom: var(--spacing-xs);
}

.card-value.large {
  font-size: 2.5rem;
}

.card-sub {
  font-size: 0.875rem;
  color: var(--gray);
}

.card-sub.green { color: var(--green); }
.card-sub.red { color: var(--red); }

/* Model toggle */
.model-toggle {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-xl);
}

.toggle-btn {
  padding: var(--spacing-xs) var(--spacing-md);
  border: 1px solid var(--gray-border);
  background: var(--white);
  border-radius: var(--border-radius);
  font-family: var(--font-family);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray);
  cursor: pointer;
  transition: all 0.2s;
}

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

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

/* Valuation badge */
.valuation-badge {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  font-size: 0.875rem;
  font-weight: 600;
}

.valuation-badge.undervalued {
  background: rgba(0, 200, 83, 0.1);
  color: var(--green);
}

.valuation-badge.fair {
  background: rgba(117, 117, 117, 0.1);
  color: var(--gray);
}

.valuation-badge.overvalued {
  background: rgba(255, 23, 68, 0.1);
  color: var(--red);
}

/* Sparkline container */
.sparkline-container {
  margin-top: var(--spacing-lg);
  padding: var(--spacing-lg);
  background: var(--gray-light);
  border-radius: var(--border-radius);
}

.sparkline-container h3 {
  margin-bottom: 0;
}

.sparkline-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: var(--spacing-sm);
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.range-toggle {
  display: flex;
  gap: 4px;
}

.range-btn {
  padding: 4px 10px;
  border: 1px solid var(--gray-border);
  border-radius: 4px;
  background: var(--white);
  font-family: var(--font-family);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--gray);
  cursor: pointer;
  transition: all 0.15s;
}

.range-btn:hover {
  border-color: var(--gray);
  color: var(--black);
}

.range-btn.active {
  background: var(--black);
  color: var(--white);
  border-color: var(--black);
}

/* Chart container */
.chart-container {
  background: var(--white);
  border: 1px solid var(--gray-border);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.chart-container canvas {
  width: 100% !important;
  height: 400px !important;
}

/* Tooltip */
.tooltip {
  background: var(--black);
  color: var(--white);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 4px;
  font-size: 0.75rem;
  max-width: 300px;
}

/* Info box */
.info-box {
  background: var(--gray-light);
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  margin: var(--spacing-lg) 0;
}

.info-box h4 {
  margin-bottom: var(--spacing-xs);
}

.info-box p {
  margin-bottom: 0;
  font-size: 0.9375rem;
}

/* Tables */
.table-container {
  overflow-x: auto;
  margin: var(--spacing-lg) 0;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

th, td {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  border-bottom: 1px solid var(--gray-border);
}

th {
  font-weight: 600;
  color: var(--gray);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

tr:hover td {
  background: var(--gray-light);
}

/* Timeline */
.timeline {
  display: flex;
  overflow-x: auto;
  gap: var(--spacing-lg);
  padding: var(--spacing-lg) 0;
  margin: var(--spacing-lg) 0;
}

.timeline-item {
  flex: 0 0 auto;
  text-align: center;
  padding: var(--spacing-md);
  background: var(--gray-light);
  border-radius: var(--border-radius);
  min-width: 150px;
}

.timeline-date {
  font-size: 0.875rem;
  color: var(--gray);
  margin-bottom: var(--spacing-xs);
}

.timeline-price {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--orange);
}

.timeline-label {
  font-size: 0.75rem;
  color: var(--gray);
  margin-top: var(--spacing-xs);
}

/* Slider */
.slider-container {
  margin: var(--spacing-xl) 0;
}

.slider-container label {
  display: block;
  font-weight: 500;
  margin-bottom: var(--spacing-sm);
}

input[type="range"] {
  width: 100%;
  height: 8px;
  border-radius: 4px;
  background: var(--gray-light);
  appearance: none;
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--orange);
  cursor: pointer;
}

/* Disclaimer */
.disclaimer {
  background: rgba(255, 23, 68, 0.05);
  border-left: 3px solid var(--red);
  padding: var(--spacing-md);
  margin: var(--spacing-lg) 0;
  font-size: 0.875rem;
}

.disclaimer p {
  margin-bottom: 0;
  color: var(--black);
}

/* Footer */
.footer {
  border-top: 1px solid var(--gray-border);
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-xxl);
}

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

.footer-section h4 {
  font-size: 0.875rem;
  margin-bottom: var(--spacing-sm);
}

.footer-section p,
.footer-section a {
  font-size: 0.8125rem;
  color: var(--gray);
}

.footer-bottom {
  margin-top: var(--spacing-lg);
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--gray-border);
  font-size: 0.75rem;
  color: var(--gray);
  text-align: center;
}

/* Loading state */
.loading {
  opacity: 0.5;
  pointer-events: none;
}

.loading::after {
  content: '';
  display: inline-block;
  width: 1em;
  height: 1em;
  border: 2px solid var(--gray-border);
  border-top-color: var(--orange);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-left: var(--spacing-xs);
}

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

/* Responsive */
@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }

  .hero h1 {
    font-size: 2.25rem;
  }

  .header .container {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .nav {
    gap: var(--spacing-md);
  }

  .card-value.large {
    font-size: 2rem;
  }

  .footer-content {
    flex-direction: column;
  }
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

/* High contrast patterns for color-blind users */
.band-extreme-under { background: repeating-linear-gradient(45deg, transparent, transparent 5px, rgba(0,200,83,0.1) 5px, rgba(0,200,83,0.1) 10px); }
.band-under { background: rgba(0,200,83,0.15); }
.band-fair { background: rgba(117,117,117,0.05); }
.band-over { background: rgba(255,23,68,0.1); }
.band-extreme-over { background: repeating-linear-gradient(45deg, transparent, transparent 5px, rgba(255,23,68,0.15) 5px, rgba(255,23,68,0.15) 10px); }

/* Weekly History Table */
.weekly-table-section {
  margin-top: var(--spacing-xxl);
}

.weekly-table-wrapper {
  max-height: 600px;
  overflow-y: auto;
  border: 1px solid var(--gray-border);
  border-radius: var(--border-radius);
  position: relative;
}

.weekly-table-wrapper table {
  margin: 0;
}

.weekly-table-wrapper thead {
  position: sticky;
  top: 0;
  background: var(--white);
  z-index: 10;
  box-shadow: 0 1px 0 var(--gray-border);
}

.weekly-table-wrapper tbody tr:last-child td {
  border-bottom: none;
}

/* Log deviation bar visualization */
.log-dev-cell {
  position: relative;
  min-width: 180px;
}

.log-dev-bar-container {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.log-dev-bar {
  flex: 1;
  height: 24px;
  background: var(--gray-light);
  border-radius: 4px;
  position: relative;
  overflow: hidden;
}

.log-dev-bar-center {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--gray);
  z-index: 2;
}

.log-dev-bar-fill {
  position: absolute;
  top: 2px;
  bottom: 2px;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.log-dev-bar-fill.under {
  right: 50%;
  background: linear-gradient(90deg, var(--green), rgba(0, 200, 83, 0.5));
}

.log-dev-bar-fill.over {
  left: 50%;
  background: linear-gradient(90deg, rgba(255, 23, 68, 0.5), var(--red));
}

.log-dev-value {
  min-width: 60px;
  font-weight: 600;
  font-size: 0.875rem;
  text-align: right;
}

.log-dev-value.under { color: var(--green); }
.log-dev-value.over { color: var(--red); }
.log-dev-value.fair { color: var(--gray); }

/* Log deviation semantic label */
.log-dev-label {
  font-size: 0.75rem;
  padding: 2px 6px;
  border-radius: 3px;
  white-space: nowrap;
}

.log-dev-label.extreme-under {
  background: rgba(0, 200, 83, 0.15);
  color: var(--green);
}

.log-dev-label.under {
  background: rgba(0, 200, 83, 0.1);
  color: var(--green);
}

.log-dev-label.fair {
  background: rgba(117, 117, 117, 0.1);
  color: var(--gray);
}

.log-dev-label.over {
  background: rgba(255, 23, 68, 0.1);
  color: var(--red);
}

.log-dev-label.extreme-over {
  background: rgba(255, 23, 68, 0.15);
  color: var(--red);
}

/* Multiple column styling */
.multiple-cell {
  font-weight: 600;
}

.multiple-cell.under { color: var(--green); }
.multiple-cell.over { color: var(--red); }
.multiple-cell.fair { color: var(--gray); }

/* Info tooltip for log deviation explanation */
.log-dev-info {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--gray-light);
  color: var(--gray);
  font-size: 0.75rem;
  font-weight: 600;
  cursor: help;
  margin-left: var(--spacing-xs);
  position: relative;
}

.log-dev-info:hover::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--black);
  color: var(--white);
  padding: var(--spacing-sm);
  border-radius: var(--border-radius);
  font-size: 0.8125rem;
  font-weight: 400;
  width: 280px;
  line-height: 1.4;
  z-index: 100;
  white-space: normal;
}

.log-dev-info:hover::before {
  content: '';
  position: absolute;
  bottom: calc(100% + 2px);
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--black);
  z-index: 100;
}

/* Search/filter for weekly table */
.weekly-table-controls {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
  flex-wrap: wrap;
  align-items: center;
}

.weekly-table-search {
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--gray-border);
  border-radius: var(--border-radius);
  font-family: var(--font-family);
  font-size: 0.9375rem;
  min-width: 200px;
}

.weekly-table-search:focus {
  outline: none;
  border-color: var(--orange);
}

/* Quick jump buttons */
.quick-jump-btns {
  display: flex;
  gap: var(--spacing-xs);
}

.quick-jump-btn {
  padding: 4px 10px;
  border: 1px solid var(--gray-border);
  background: var(--white);
  border-radius: var(--border-radius);
  font-family: var(--font-family);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--gray);
  cursor: pointer;
  transition: all 0.2s;
}

.quick-jump-btn:hover {
  border-color: var(--orange);
  color: var(--orange);
}

/* Row highlight for current week */
.weekly-table-wrapper tr.current-week {
  background: rgba(247, 147, 26, 0.08);
}

.weekly-table-wrapper tr.current-week td {
  font-weight: 600;
}

/* Scale toggle pill group */
.scale-toggles {
  display: flex;
  justify-content: center;
  gap: var(--spacing-xl);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-xl);
}

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

.scale-group-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  min-width: 52px;
}

.pill-group {
  display: flex;
  border: 1px solid var(--gray-border);
  border-radius: 20px;
  overflow: hidden;
  background: var(--white);
}

.pill-btn {
  padding: 6px 18px;
  border: none;
  background: transparent;
  font-family: var(--font-family);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray);
  cursor: pointer;
  transition: background 0.2s, color 0.2s;
  white-space: nowrap;
}

.pill-btn:hover {
  background: var(--gray-light);
}

.pill-btn.active {
  background: var(--black);
  color: var(--white);
}

/* Stats row */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.stat-item {
  text-align: center;
  padding: var(--spacing-sm);
  background: var(--gray-light);
  border-radius: var(--border-radius);
}

.stat-item .stat-label {
  font-size: 0.75rem;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 2px;
}

.stat-item .stat-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--black);
}

.stat-item .stat-value.green { color: var(--green); }
.stat-item .stat-value.red   { color: var(--red); }

/* Chart controls row (zoom + export) */
.chart-controls {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: var(--spacing-md);
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.zoom-group {
  display: flex;
  gap: 0;
  border: 1px solid var(--gray-border);
  border-radius: var(--border-radius);
  overflow: hidden;
}

.zoom-btn {
  padding: 0.4rem 0.85rem;
  font-size: 0.8rem;
  font-weight: 600;
  border: none;
  background: var(--white);
  color: var(--gray);
  cursor: pointer;
  transition: all 0.15s ease;
  border-right: 1px solid var(--gray-border);
}

.zoom-btn:last-child {
  border-right: none;
}

.zoom-btn:hover {
  background: var(--gray-light);
  color: var(--black);
}

.zoom-btn.active {
  background: var(--black);
  color: var(--white);
}

/* Responsive adjustments */
@media (max-width: 768px) {
  .weekly-table-wrapper {
    max-height: 400px;
  }

  .log-dev-bar-container {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .log-dev-value {
    text-align: left;
  }

  .weekly-table-controls {
    flex-direction: column;
    align-items: stretch;
  }
}