/* Base Styles & Custom Variables */
:root {
  --bg-color: #FAF9F6; /* Warm off-white paper background */
  --text-color: #2A2A2A; /* Graphite text */
  --text-dark: #1C1C1C;
  --text-muted: #66615B;
  --border-color: #E5E0D8; /* Muted gray divider lines */
  
  /* Restrained Accents */
  --accent-color: #4C5E70; /* Restrained blue-gray */
  --accent-hover: #3A4A58;
  --accent-bg: #F1F4F6;
  
  /* Muted Green (Evidence/Accepted) */
  --green-text: #2C5E3B;
  --green-bg: #EBF2ED;
  --green-border: #C6DBCB;
  
  /* Amber (Limitations/Caution) */
  --amber-text: #7C501A;
  --amber-bg: #FCF6E8;
  --amber-border: #EAD8B5;
  
  /* Fonts */
  --font-serif: Georgia, Cambria, "Times New Roman", Times, serif;
  --font-mono: Consolas, "Andale Mono", "Lucida Console", Monaco, monospace;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: var(--bg-color);
  color: var(--text-color);
  font-family: var(--font-serif);
  font-size: 1.125rem;
  line-height: 1.625;
  padding: 4rem 2rem;
  -webkit-font-smoothing: antialiased;
}

/* Page Layout */
.page-container {
  max-width: 740px;
  margin: 0 auto;
}

.section {
  padding: 3rem 0;
}

.section-divider {
  border: 0;
  border-top: 1px solid var(--border-color);
  margin: 1rem 0;
}

/* Typography Details */
h1, h2, h3 {
  color: var(--text-dark);
  font-weight: 600;
  line-height: 1.25;
}

h1 {
  font-size: 2.75rem;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
}

h2 {
  font-size: 1.625rem;
  letter-spacing: -0.01em;
  margin-bottom: 1.5rem;
}

h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

p {
  margin-bottom: 1.25rem;
}

ul {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
}

li {
  margin-bottom: 0.5rem;
}

/* Eyebrows and Monospace Metadata */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent-color);
  margin-bottom: 1rem;
  display: block;
}

.note-label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

/* Hero Section Specifics */
.hero-section {
  padding-bottom: 4rem;
}

.hero-subtitle {
  font-size: 1.375rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  font-style: italic;
}

.hero-content {
  margin-bottom: 2.5rem;
}

.hero-paragraph {
  font-size: 1.25rem;
  line-height: 1.55;
  margin-bottom: 1rem;
}

.non-claim-highlight {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--amber-text);
  background-color: var(--amber-bg);
  border: 1px solid var(--amber-border);
  padding: 0.75rem 1rem;
  border-radius: 4px;
  display: inline-block;
}

/* Evidence Strip */
.evidence-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
  border-top: 1px solid var(--border-color);
  border-bottom: 1px solid var(--border-color);
  padding: 1rem 0;
}

.evidence-strip-item {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--text-dark);
}

.dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  display: inline-block;
}

.green-dot {
  background-color: var(--green-text);
}

.gray-dot {
  background-color: var(--text-muted);
}

.amber-dot {
  background-color: var(--amber-text);
}

/* CTAs and Buttons */
.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.btn {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  text-decoration: none;
  padding: 0.875rem 1.75rem;
  border-radius: 4px;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
  text-align: center;
  font-weight: 500;
}

.btn-primary {
  background-color: var(--accent-color);
  color: #FFFFFF;
  border: 1px solid var(--accent-color);
}

.btn-primary:hover {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-dark);
  border: 1px solid var(--border-color);
}

.btn-secondary:hover {
  background-color: #FAF6EE;
  border-color: var(--text-dark);
}

.future-product-note {
  font-size: 0.9375rem;
  color: var(--text-muted);
  border-left: 2px solid var(--accent-color);
  padding-left: 0.75rem;
}

/* Abstract Section */
.abstract-future-product-note {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px dashed var(--border-color);
  font-size: 1rem;
  color: var(--text-muted);
}

/* Research Question */
.research-question {
  font-size: 1.5rem;
  line-height: 1.5;
  color: var(--text-dark);
  border-left: 3px solid var(--border-color);
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.question-supporting-text {
  font-size: 1rem;
  color: var(--text-muted);
}

/* Method Overview Section & Diagram */
.method-diagram {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin: 2.5rem 0;
  border: 1px solid var(--border-color);
  padding: 1.5rem;
  background-color: #FAF8F5;
  border-radius: 4px;
}

.diagram-step {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1rem;
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: 4px;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--accent-color);
  font-weight: bold;
  background-color: var(--accent-bg);
  padding: 0.125rem 0.5rem;
  border-radius: 3px;
}

.step-label {
  font-size: 1rem;
  color: var(--text-dark);
  font-weight: 500;
}

.diagram-arrow {
  text-align: center;
  color: var(--text-muted);
  font-size: 1.25rem;
  line-height: 1;
  padding: 0.125rem 0;
}

.public-safe-callout {
  font-size: 0.9375rem;
  color: var(--text-muted);
  padding: 1rem;
  background-color: var(--accent-bg);
  border-radius: 4px;
  border-left: 3px solid var(--accent-color);
}

/* Current Evidence Section */
.claim-card {
  border-radius: 4px;
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}

.green-card {
  background-color: var(--green-bg);
  border: 1px solid var(--green-border);
}

.claim-card-title {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--green-text);
  margin-bottom: 0.5rem;
}

.claim-card-body {
  font-size: 1.25rem;
  line-height: 1.45;
  color: var(--text-dark);
}

.evidence-claim-ceiling {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  border-bottom: 1px dashed var(--border-color);
  padding-bottom: 1.25rem;
}

.evidence-labels-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.evidence-label-item {
  border: 1px solid var(--border-color);
  padding: 1rem;
  border-radius: 4px;
  background-color: #FFFFFF;
}

.label-heading {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.25rem;
}

.label-value {
  font-size: 1rem;
  color: var(--text-dark);
  font-weight: 500;
}

/* Daily Public Reports */
.reports-summary-list {
  list-style-type: square;
  margin-left: 1.5rem;
  margin-bottom: 1.5rem;
}

.reports-non-claim {
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
}

.report-placeholder-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  border: 1px solid var(--border-color);
  padding: 1.25rem;
  background-color: #FFFFFF;
  border-radius: 4px;
}

.placeholder-status-icon {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: #D3CFC9;
  display: inline-block;
}

.placeholder-text {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* Limitations Section (Prominent) */
.limitations-callout {
  border-radius: 4px;
  padding: 2rem;
  margin-top: 1rem;
}

.amber-card {
  background-color: var(--amber-bg);
  border: 1px solid var(--amber-border);
}

.limitations-callout-title {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--amber-text);
  margin-bottom: 0.75rem;
}

.limitations-callout-intro {
  font-size: 1.1875rem;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 1.25rem;
}

.limitations-list {
  margin-bottom: 0;
  padding-left: 1.25rem;
}

.limitations-list li {
  font-size: 1rem;
  color: var(--text-color);
  margin-bottom: 0.625rem;
}

.limitations-list li::marker {
  color: var(--amber-text);
}

/* Support Section */
.support-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}

.support-benefits-list {
  list-style-type: circle;
  margin-left: 1.5rem;
}

.support-target-card {
  border: 1px solid var(--border-color);
  background-color: #FFFFFF;
  border-radius: 4px;
  padding: 1.5rem;
}

.target-card-header {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 1rem;
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.target-title {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.target-amount {
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--text-dark);
}

.target-period {
  font-size: 0.9375rem;
  color: var(--text-muted);
  font-weight: normal;
}

.target-channel {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 1rem;
}

.channel-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.channel-name {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--accent-color);
}

.payment-note {
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

.support-disclaimer-box {
  background-color: var(--accent-bg);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 1.25rem;
}

.non-purchase-statement {
  font-size: 1rem;
  color: var(--text-dark);
  margin-bottom: 0.75rem;
}

.unsupported-channel-note {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* Future Product Section */
.product-banner {
  border-left: 3px solid var(--accent-color);
  padding-left: 1.25rem;
  margin-bottom: 1.5rem;
}

.product-name {
  font-size: 1.375rem;
  color: var(--text-dark);
  margin-bottom: 0.25rem;
}

.product-non-claim {
  font-size: 0.9375rem;
  color: var(--text-muted);
  margin-top: 1.25rem;
  border-top: 1px dashed var(--border-color);
  padding-top: 1rem;
}

/* Footer Styles */
.page-footer {
  border-top: 1px solid var(--border-color);
  padding: 3rem 0;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-primary {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  margin-bottom: 1.5rem;
}

.footer-brand {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-dark);
}

.footer-desc {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.footer-secondary {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border-top: 1px dashed var(--border-color);
  padding-top: 1.5rem;
}

.footer-product-line {
  font-weight: 500;
}

.footer-readiness-line {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--amber-text);
}

/* Reports Phase Updates styling */
.reports-intro {
  font-size: 1.125rem;
  color: var(--text-color);
  margin-bottom: 1rem;
}

.phase-system-intro-wrapper {
  margin-top: 2rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.75rem;
}

.phase-system-title {
  font-size: 1.375rem;
  color: var(--text-dark);
  margin-bottom: 0.25rem;
}

.phase-system-intro {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

.phase-stack {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.phase-card {
  background-color: #FFFFFF;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  padding: 1.5rem;
}

.phase-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.phase-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: bold;
  background-color: var(--accent-bg);
  color: var(--accent-color);
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 3px;
  text-transform: uppercase;
}

.phase-title {
  font-size: 1.25rem;
  margin-bottom: 0;
  color: var(--text-dark);
}

.phase-summary {
  font-size: 1rem;
  color: var(--text-color);
  margin-bottom: 1rem;
}

.phase-evidence-wrapper {
  margin-bottom: 1rem;
}

.phase-meta-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.phase-evidence-list {
  list-style-type: square;
  padding-left: 1.25rem;
  margin-bottom: 0;
}

.phase-evidence-list li {
  font-size: 0.9375rem;
  color: var(--text-color);
  margin-bottom: 0.25rem;
}

.phase-limitation-wrapper {
  background-color: var(--bg-color);
  border: 1px solid var(--border-color);
  padding: 0.75rem 1rem;
  border-radius: 4px;
}

.phase-limitation-text {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-bottom: 0;
  line-height: 1.5;
}

/* Responsive Tweaks */
@media (min-width: 600px) {
  body {
    padding: 6rem 4rem;
  }
  
  /* Horizontal layout for diagram on wider screens */
  .method-diagram {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
  }
  
  .diagram-step {
    flex-direction: column;
    text-align: center;
    gap: 0.375rem;
    padding: 0.75rem;
    flex: 1;
    min-width: 140px;
    align-self: stretch;
    justify-content: center;
  }
  
  .diagram-arrow {
    padding: 0 0.25rem;
  }
  
  .evidence-labels-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .support-grid {
    grid-template-columns: 1.2fr 0.8fr;
  }
}

/* ==========================================================================
   Tabbed System (CSS-only using radio button hack)
   ========================================================================== */

/* Hide radio inputs completely */
.tab-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

/* Tab Navigation Row */
.tab-nav {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.15rem;
  border-bottom: 2px solid var(--border-color);
  margin-bottom: 2.5rem;
}

/* Tab Labels Styling */
.tab-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  padding: 0.625rem 0.65rem;
  border: 1px solid transparent;
  border-bottom: none;
  border-radius: 4px 4px 0 0;
  cursor: pointer;
  transition: all 0.15s ease-in-out;
  user-select: none;
  margin-bottom: -2px; /* Pull down to overlap active border */
  white-space: nowrap;
}

.tab-label:hover {
  color: var(--text-dark);
  background-color: var(--accent-bg);
}

/* Active tab style for standard tabs */
#tab-start:checked ~ .tab-nav .label-start,
#tab-thesis:checked ~ .tab-nav .label-thesis,
#tab-method:checked ~ .tab-nav .label-method,
#tab-evidence:checked ~ .tab-nav .label-evidence,
#tab-reports:checked ~ .tab-nav .label-reports,
#tab-support:checked ~ .tab-nav .label-support,
#tab-future:checked ~ .tab-nav .label-future {
  color: var(--text-dark);
  font-weight: bold;
  background-color: var(--bg-color);
  border: 2px solid var(--border-color);
  border-bottom-color: var(--bg-color); /* Matches container background */
  z-index: 1;
}

/* Limitations Tab - Visually Prominent (Caution/Amber) */
.prominent-tab {
  color: var(--amber-text);
}

.prominent-tab:hover {
  background-color: var(--amber-bg);
}

#tab-limitations:checked ~ .tab-nav .prominent-tab {
  color: var(--amber-text);
  font-weight: bold;
  background-color: var(--amber-bg);
  border: 2px solid var(--amber-border);
  border-bottom-color: var(--amber-bg);
  z-index: 1;
}

/* Tab Panels Display */
.tab-panel {
  display: none;
  animation: tabFadeIn 0.25s ease-out;
}

/* Show panels when their radio button is checked */
#tab-start:checked ~ .tab-panels #panel-start,
#tab-thesis:checked ~ .tab-panels #panel-thesis,
#tab-method:checked ~ .tab-panels #panel-method,
#tab-evidence:checked ~ .tab-panels #panel-evidence,
#tab-reports:checked ~ .tab-panels #panel-reports,
#tab-limitations:checked ~ .tab-panels #panel-limitations,
#tab-support:checked ~ .tab-panels #panel-support,
#tab-future:checked ~ .tab-panels #panel-future {
  display: block;
}

/* Tab transition effect */
@keyframes tabFadeIn {
  from {
    opacity: 0;
    transform: translateY(4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Mobile Tweaks for Tabbed Interface */
@media (max-width: 600px) {
  .tab-nav {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.375rem;
    border-bottom: none;
    margin-bottom: 2rem;
  }

  .tab-label {
    border-radius: 4px;
    border: 1px solid var(--border-color) !important;
    text-align: center;
    padding: 0.75rem 0.5rem;
    margin-bottom: 0;
  }

  /* Distinct active color scheme on mobile grid */
  #tab-start:checked ~ .tab-nav .label-start,
  #tab-thesis:checked ~ .tab-nav .label-thesis,
  #tab-method:checked ~ .tab-nav .label-method,
  #tab-evidence:checked ~ .tab-nav .label-evidence,
  #tab-reports:checked ~ .tab-nav .label-reports,
  #tab-support:checked ~ .tab-nav .label-support,
  #tab-future:checked ~ .tab-nav .label-future {
    background-color: var(--accent-color);
    color: #FFFFFF;
    border-color: var(--accent-color) !important;
  }

  #tab-limitations:checked ~ .tab-nav .prominent-tab {
    background-color: var(--amber-text);
    color: #FFFFFF;
    border-color: var(--amber-text) !important;
  }
}

/* Short version box in Start Here panel */
.short-version-box {
  background-color: var(--accent-bg);
  border: 1px solid var(--border-color);
  border-left: 4px solid var(--accent-color);
  border-radius: 4px;
  padding: 1.5rem;
  margin-top: 2rem;
  margin-bottom: 2.5rem;
}

.short-version-title {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent-color);
  margin-bottom: 1rem;
  font-weight: bold;
}

.short-version-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

@media (min-width: 600px) {
  .short-version-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.short-version-item h4 {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.375rem;
}

.short-version-item p {
  font-size: 0.9375rem;
  line-height: 1.45;
  margin-bottom: 0;
  color: var(--text-color);
}