/* ==========================================================================
   Search for Better Search — Bespoke CSS Stylesheet
   Theme: Civic-Tech Signal Observatory & Editorial Notebook
   ========================================================================== */

:root {
  /* HSL Color System — Slate & Technical Teal/Sky (Light Mode) */
  --bg-base: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-alt: #f1f5f9;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-inverse: #ffffff;
  --accent: #0284c7; /* Sky 600 */
  --accent-rgb: 2, 132, 199;
  --accent-hover: #0369a1;
  --border: #cbd5e1;
  --border-focus: #0f172a;
  --signal-green: #10b981;
  --grid-color: rgba(148, 163, 184, 0.08);

  /* Typography */
  --font-serif: Georgia, Cambria, "Times New Roman", Times, serif;
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.05), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.08);

  /* Transitions */
  --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

@media (prefers-color-scheme: dark) {
  :root {
    /* Color Palette — Deep Obsidian & Sky Blue Signals (Dark Mode) */
    --bg-base: #090d16;
    --bg-surface: #0f172a;
    --bg-surface-alt: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-inverse: #090d16;
    --accent: #38bdf8; /* Sky 400 */
    --accent-rgb: 56, 189, 248;
    --accent-hover: #7dd3fc;
    --border: #334155;
    --border-focus: #f8fafc;
    --signal-green: #34d399;
    --grid-color: rgba(51, 65, 85, 0.2);

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.4);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
  }
}

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

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

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-base);
  background-image: radial-gradient(var(--grid-color) 1px, transparent 1px);
  background-size: 24px 24px;
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.625;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Skip Link for Accessibility */
.skip-link {
  position: absolute;
  top: -60px;
  left: 1.5rem;
  background: var(--accent);
  color: var(--text-inverse);
  padding: 8px 16px;
  z-index: 1000;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-decoration: none;
  transition: top var(--transition-fast);
  border-radius: 0 0 4px 4px;
  border: 1px solid var(--border);
  border-top: none;
}

.skip-link:focus {
  top: 0;
  outline: none;
}

/* Global Focus Ring */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

/* Typography & Layout elements */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  color: var(--text-main);
  margin-top: 0;
  font-weight: 800;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

p, li, blockquote {
  text-wrap: pretty;
}

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

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

/* Structural Containers */
.header-container,
.main-container,
.footer-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Telemetry Status Bar */
.observatory-status-bar {
  background-color: var(--bg-surface-alt);
  border-bottom: 1px solid var(--border);
  padding: 0.6rem 0;
  font-size: 0.75rem;
}

.status-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.status-item {
  display: flex;
  align-items: center;
  font-family: var(--font-mono);
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.status-dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  background-color: var(--signal-green);
  border-radius: 50%;
  margin-right: 8px;
  box-shadow: 0 0 6px var(--signal-green);
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0% { transform: scale(0.9); opacity: 0.6; }
  50% { transform: scale(1.2); opacity: 1; }
  100% { transform: scale(0.9); opacity: 0.6; }
}

/* Header & Masthead */
.site-header {
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: 3.5rem 0 2rem 0;
  position: relative;
}

.site-header::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 0;
  width: 100%;
  height: 1px;
  background-color: var(--border);
}

.masthead {
  text-align: center;
  margin-bottom: 2.5rem;
}

.masthead-pre {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
  display: block;
  margin-bottom: 0.5rem;
}

.site-title {
  font-size: 2.75rem;
  margin: 0.5rem 0;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: -0.04em;
}

.site-title a {
  color: var(--text-main);
  transition: color var(--transition-fast);
}

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

.masthead-sub {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.15rem;
  color: var(--text-muted);
  display: block;
  max-width: 600px;
  margin: 0.5rem auto 0 auto;
  line-height: 1.4;
}

/* Navigation System */
.site-nav {
  display: flex;
  justify-content: center;
  border-top: 1px dashed var(--border);
  border-bottom: 1px dashed var(--border);
  padding: 0.75rem 0;
  margin-top: 2rem;
}

.nav-list {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 1.5rem;
}

.nav-item a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  padding: 0.4rem 0.8rem;
  border: 1px solid transparent;
  border-radius: 4px;
  transition: all var(--transition-fast);
}

.nav-item a:hover {
  color: var(--accent);
  background-color: var(--bg-surface-alt);
  border-color: var(--border);
}

.nav-item a.active {
  color: var(--text-main);
  background-color: var(--bg-surface-alt);
  border-color: var(--accent);
  box-shadow: 0 0 10px rgba(var(--accent-rgb), 0.1);
}

/* Main Content Area */
.site-main {
  padding: 4.5rem 0;
  min-height: calc(100vh - 450px);
}

/* Homepage Layout & Manifesto */
.homepage-article {
  max-width: 740px;
  margin: 0 auto 5rem auto;
}

.article-header {
  text-align: left;
  margin-bottom: 3rem;
}

.article-title {
  font-size: 2.75rem;
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 1rem;
}

.article-subtitle {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.25rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin: 0;
  border-left: 3px solid var(--accent);
  padding-left: 1.25rem;
}

.article-content {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--text-main);
}

.article-content p {
  margin-bottom: 1.75rem;
}

.article-content > p:first-of-type::first-letter {
  float: left;
  font-family: var(--font-serif);
  font-size: 4rem;
  line-height: 0.8;
  padding: 0.2rem 0.6rem 0 0;
  font-weight: 900;
  color: var(--accent);
}

/* Ordered list inside content */
.article-content ol {
  padding-left: 1.5rem;
  margin-bottom: 2rem;
  font-family: var(--font-sans);
  font-size: 1.05rem;
}

.article-content li {
  margin-bottom: 1rem;
  line-height: 1.6;
}

.article-content li strong {
  color: var(--accent);
}

/* Signal / Trust Registry Section */
.registry-section {
  border-top: 1px dashed var(--border);
  padding-top: 4.5rem;
}

.registry-header-block {
  text-align: left;
  margin-bottom: 3.5rem;
}

.registry-heading-title {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-main);
  margin-bottom: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.registry-heading-title::before {
  content: "";
  display: inline-block;
  width: 10px;
  height: 10px;
  background-color: var(--accent);
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
}

.registry-heading-subtitle {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 650px;
  margin: 0;
  line-height: 1.5;
}

/* Quote Dossier Grid */
.quotes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
  gap: 1.5rem;
}

.quote-card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 2rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  position: relative;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.quote-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: transparent;
  transition: background-color var(--transition-normal);
}

.quote-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent);
  box-shadow: var(--shadow-lg), 0 0 20px rgba(var(--accent-rgb), 0.08);
}

.quote-card:hover::before {
  background-color: var(--accent);
}

.quote-meta-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 0.75rem;
  margin-bottom: 1.25rem;
}

.record-id {
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.05em;
}

.record-source {
  color: var(--text-muted);
  text-transform: uppercase;
  font-size: 0.7rem;
  letter-spacing: 0.02em;
}

.quote-body {
  margin: 0;
  padding: 0;
  flex-grow: 1;
}

.quote-body p {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--text-main);
  margin: 0 0 1.5rem 0;
}

.quote-footer {
  margin-top: auto;
  border-top: 1px dashed var(--border);
  padding-top: 1rem;
  display: flex;
  justify-content: flex-end;
}

.quote-author {
  font-family: var(--font-mono);
  font-style: normal;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  background-color: var(--bg-surface-alt);
  padding: 0.25rem 0.6rem;
  border-radius: 4px;
  border: 1px solid var(--border);
}

/* Single Pages Layout */
.single-page {
  max-width: 700px;
  margin: 0 auto;
}

.page-header {
  border-bottom: 1px solid var(--border);
  padding-bottom: 2rem;
  margin-bottom: 3rem;
  text-align: left;
}

.page-title {
  font-size: 2.75rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 0.75rem;
}

.page-summary {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 1.2rem;
  color: var(--text-muted);
  margin: 0.5rem 0 1.5rem 0;
  line-height: 1.6;
  border-left: 3px solid var(--accent);
  padding-left: 1.25rem;
}

.page-metadata {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

.meta-label {
  color: var(--accent);
  font-weight: 700;
  margin-right: 0.5rem;
}

.page-content {
  font-size: 1.1rem;
  line-height: 1.8;
  color: var(--text-main);
}

.page-content p {
  margin-bottom: 1.5rem;
}

.page-content h3 {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  margin-top: 3rem;
  margin-bottom: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 1px dashed var(--border);
  padding-bottom: 0.5rem;
  color: var(--text-main);
}

.page-content ul {
  padding-left: 1.5rem;
  margin-bottom: 1.5rem;
}

.page-content li {
  margin-bottom: 0.5rem;
}

.page-content code {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background-color: var(--bg-surface-alt);
  padding: 0.15rem 0.35rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  color: var(--accent);
}

/* Dossier Stamp/PGP signature formatting */
.page-content ul li strong + code,
.page-content p strong + code {
  display: block;
  margin: 1rem 0;
  padding: 1.25rem;
  font-size: 0.85rem;
  background-color: var(--bg-surface-alt);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: 4px;
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
  color: var(--text-main);
}

/* Footer Section */
.site-footer {
  border-top: 1px solid var(--border);
  background-color: var(--bg-surface-alt);
  padding: 4rem 0 3rem 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.footer-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 3rem;
}

.footer-info {
  flex: 1 1 400px;
}

.footer-tagline {
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--text-main);
  margin-top: 0;
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: -0.02em;
}

.footer-meta {
  line-height: 1.6;
}

.footer-nav-container {
  flex: 1 1 300px;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1.5rem;
}

.footer-nav-list {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  gap: 2rem;
}

.footer-nav-list a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

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

.copyright {
  margin: 0;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.7rem;
}

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

  .site-header {
    padding: 2.5rem 0 1.5rem 0;
  }

  .masthead-sub {
    font-size: 1rem;
  }

  .site-nav {
    margin-top: 1.5rem;
    padding: 0.6rem 0;
  }

  .nav-list {
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  .nav-item a {
    font-size: 0.75rem;
    padding: 0.3rem 0.6rem;
  }

  .site-main {
    padding: 3rem 0;
  }

  .article-title, .page-title {
    font-size: 2.2rem;
  }

  .quotes-grid {
    grid-template-columns: 1fr;
  }

  .status-container {
    flex-direction: column;
    gap: 0.35rem;
    align-items: flex-start;
  }

  .footer-container {
    flex-direction: column;
    gap: 2rem;
  }

  .footer-nav-container {
    align-items: flex-start;
  }

  .copyright {
    text-align: left;
  }
}

@media (max-width: 480px) {
  .site-title {
    font-size: 1.75rem;
  }

  .nav-list {
    gap: 0.25rem;
  }

  .nav-item a {
    font-size: 0.7rem;
    padding: 0.25rem 0.5rem;
  }
}