/* Drumurile petrolului pe Valea Prahovei — Stylesheet */
/* Strict dual theming (WCAG AAA contrast) with semantic variables */

:root {
  /* Light Theme (Default) */
  --bg-app: #f7f5f0;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #efece4;
  --bg-surface-sunken: #e5e1d5;
  
  --text-primary: #191614;
  --text-secondary: #2b2622;
  --text-muted: #574f46;
  --text-accent: #9a3412;
  
  --border-subtle: #d8d2c4;
  --border-strong: #9e9483;
  --border-accent: #b45309;
  
  --badge-bg: #f5eedc;
  --badge-text: #78350f;
  --badge-border: #d97706;

  --tag-atestat-bg: #e2f0d9;
  --tag-atestat-text: #1b4d1b;
  --tag-atestat-border: #70ad47;

  --tag-legenda-bg: #fef0d9;
  --tag-legenda-text: #7f4b00;
  --tag-legenda-border: #ed7d31;

  --tag-interpretare-bg: #ece5f7;
  --tag-interpretare-text: #432874;
  --tag-interpretare-border: #9b7fd8;

  --accent-crude: #2a2521;
  --accent-rust: #9a3412;
  --accent-amber: #b45309;
  --accent-iridescent: #0f766e;
  
  --font-serif: "Spectral", Georgia, "Times New Roman", serif;
  --font-display: "Newsreader", "Fraunces", Georgia, serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "IBM Plex Mono", "Space Mono", ui-monospace, monospace;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 10px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.12);
  
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 14px;
}

[data-theme="dark"] {
  /* Dark Theme */
  --bg-app: #0e1117;
  --bg-surface: #161b22;
  --bg-surface-elevated: #1f2631;
  --bg-surface-sunken: #090c10;
  
  --text-primary: #f8fafc;
  --text-secondary: #e2e8f0;
  --text-muted: #94a3b8;
  --text-accent: #f97316;
  
  --border-subtle: #30363d;
  --border-strong: #4b5563;
  --border-accent: #ea580c;
  
  --badge-bg: #272115;
  --badge-text: #fde68a;
  --badge-border: #d97706;

  --tag-atestat-bg: #102a1c;
  --tag-atestat-text: #86efac;
  --tag-atestat-border: #22c55e;

  --tag-legenda-bg: #321c0e;
  --tag-legenda-text: #fed7aa;
  --tag-legenda-border: #f97316;

  --tag-interpretare-bg: #24163b;
  --tag-interpretare-text: #d8b4fe;
  --tag-interpretare-border: #a855f7;

  --accent-crude: #090c10;
  --accent-rust: #ea580c;
  --accent-amber: #f59e0b;
  --accent-iridescent: #14b8a6;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 10px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.6);
}

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

html {
  font-size: 18px;
  background-color: var(--bg-app);
  color: var(--text-primary);
  font-family: var(--font-serif);
  line-height: 1.72;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

body {
  min-height: 100vh;
  background-color: var(--bg-app);
  color: var(--text-primary);
  display: flex;
  flex-direction: column;
  position: relative;
}

/* Skip Link */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--text-primary);
  color: var(--bg-app);
  padding: 0.5rem 1rem;
  z-index: 1000;
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 600;
  transition: top 0.2s ease;
}
.skip-link:focus {
  top: 1rem;
}

/* Layout Containers */
.shell {
  max-width: 50rem;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.shell-wide {
  max-width: 66rem;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

/* Top Navigation Bar */
.topbar {
  border-bottom: 1px solid var(--border-subtle);
  background-color: var(--bg-surface);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 3.6rem;
}

.brand {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.95rem;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.brand:hover {
  color: var(--text-accent);
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.lang-switch {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.lang-switch a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 0.2rem 0.4rem;
  border-radius: var(--radius-sm);
  transition: all 0.15s ease;
}

.lang-switch a[aria-current="page"] {
  color: var(--text-primary);
  background-color: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
}

.lang-switch a:hover:not([aria-current="page"]) {
  color: var(--text-accent);
}

.theme-toggle {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 0.35rem 0.65rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.15s ease;
}
.theme-toggle:hover {
  border-color: var(--border-strong);
  color: var(--text-accent);
}

/* Hero Section */
.hero {
  padding-top: 4.5rem;
  padding-bottom: 3.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.kicker {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-accent);
  margin-bottom: 1rem;
  display: inline-block;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.3rem, 5.5vw, 3.5rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.hero-deck {
  font-size: clamp(1.15rem, 2.3vw, 1.35rem);
  line-height: 1.58;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  font-style: italic;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.25rem;
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.meta-label {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* Epistemic Switcher Toolbar */
.epistemic-toolbar {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.4rem;
  margin: 2.5rem 0 3.5rem;
  box-shadow: var(--shadow-sm);
}

.epistemic-toolbar-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 0.8rem;
}

.epistemic-title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--text-primary);
}

.epistemic-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
  margin-bottom: 1rem;
}

.epistemic-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.filter-btn {
  font-family: var(--font-sans);
  font-size: 0.84rem;
  font-weight: 600;
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface-elevated);
  color: var(--text-secondary);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: all 0.15s ease;
}

.filter-btn:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.filter-btn[aria-pressed="true"] {
  background: var(--text-primary);
  color: var(--bg-app);
  border-color: var(--text-primary);
}

/* Epistemic Badges inside copy */
.badge-epistemic {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  margin-right: 0.35rem;
  vertical-align: baseline;
  border: 1px solid transparent;
}

.badge-atestat {
  background-color: var(--tag-atestat-bg);
  color: var(--tag-atestat-text);
  border-color: var(--tag-atestat-border);
}

.badge-legenda {
  background-color: var(--tag-legenda-bg);
  color: var(--tag-legenda-text);
  border-color: var(--tag-legenda-border);
}

.badge-interpretare {
  background-color: var(--tag-interpretare-bg);
  color: var(--tag-interpretare-text);
  border-color: var(--tag-interpretare-border);
}

.dimmed-epistemic {
  opacity: 0.28;
  filter: grayscale(80%);
  transition: opacity 0.2s ease, filter 0.2s ease;
}

/* Archival Figures & Photographic Evidence */
figure.archival-figure {
  margin: 2.5rem 0;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

figure.archival-figure img {
  width: 100%;
  height: auto;
  display: block;
  border-bottom: 1px solid var(--border-subtle);
}

figure.archival-figure figcaption {
  padding: 1rem 1.4rem;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  line-height: 1.55;
  color: var(--text-secondary);
  background-color: var(--bg-surface-elevated);
}

figure.archival-figure .fig-attribution {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.4rem;
}

/* Prose Sections */
.article-chapter {
  padding-top: 3.5rem;
  padding-bottom: 3.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.chapter-number {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--text-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
  display: block;
}

.chapter-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin-bottom: 1.5rem;
}

.prose p {
  margin-bottom: 1.4rem;
  font-size: 1.05rem;
  color: var(--text-secondary);
}

.prose p.lead {
  font-size: 1.18rem;
  line-height: 1.65;
  color: var(--text-primary);
  font-weight: 500;
}

.prose h3 {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
  margin-top: 2.5rem;
  margin-bottom: 1rem;
}

.prose blockquote {
  border-left: 3px solid var(--border-accent);
  padding-left: 1.3rem;
  margin: 2rem 0;
  font-style: italic;
  color: var(--text-secondary);
}

.prose blockquote cite {
  display: block;
  font-family: var(--font-sans);
  font-size: 0.85rem;
  font-style: normal;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* Highlight box / archival vignette */
.archival-vignette {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  margin: 2rem 0;
  box-shadow: var(--shadow-sm);
}

.vignette-header {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-accent);
  margin-bottom: 0.75rem;
}

.vignette-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
}

.vignette-body {
  font-size: 0.98rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Interactive Component 1: Stratigraphy Cross Section */
.widget-box {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  margin: 3rem 0;
  box-shadow: var(--shadow-md);
}

.widget-title-bar {
  margin-bottom: 1.5rem;
}

.widget-badge {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-accent);
  margin-bottom: 0.35rem;
  display: block;
}

.widget-title {
  font-family: var(--font-display);
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--text-primary);
}

.stratigraphy-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 1.5rem;
  align-items: stretch;
}

.depth-selector {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  border-right: 1px solid var(--border-subtle);
  padding-right: 1.2rem;
}

.depth-btn {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.85rem;
  text-align: left;
  cursor: pointer;
  transition: all 0.15s ease;
  display: flex;
  flex-direction: column;
}

.depth-btn:hover {
  border-color: var(--border-strong);
  background: var(--bg-surface-sunken);
}

.depth-btn[aria-selected="true"] {
  background: var(--bg-surface);
  border-color: var(--border-accent);
  box-shadow: inset 3px 0 0 var(--border-accent);
}

.depth-meter {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text-accent);
}

.depth-name {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--text-secondary);
}

.depth-display {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.depth-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
  border-top: 1px solid var(--border-subtle);
  padding-top: 1.2rem;
}

.stat-block {
  display: flex;
  flex-direction: column;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  color: var(--text-muted);
}

.stat-val {
  font-family: var(--font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 0.2rem;
}

/* Interactive Component 2: Pipe Yard Map */
.yard-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.yard-visual {
  background: var(--bg-surface-sunken);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  position: relative;
  min-height: 380px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.yard-elements {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}

.yard-node-btn {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 0.65rem 0.9rem;
  text-align: left;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.15s ease;
}

.yard-node-btn:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.yard-node-btn[aria-pressed="true"] {
  background: var(--bg-surface-elevated);
  border-color: var(--border-accent);
  color: var(--text-primary);
  font-weight: 600;
  box-shadow: inset 4px 0 0 var(--border-accent);
}

.yard-detail {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

/* Interactive Component 3: 1 August 1943 Ground Timeline */
.timeline-stepper {
  display: flex;
  overflow-x: auto;
  gap: 0.5rem;
  padding-bottom: 0.75rem;
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.time-step-btn {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  font-weight: 700;
  padding: 0.45rem 0.85rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: var(--bg-surface-elevated);
  color: var(--text-secondary);
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.15s ease;
}

.time-step-btn:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
}

.time-step-btn[aria-selected="true"] {
  background: var(--text-accent);
  color: #ffffff;
  border-color: var(--text-accent);
}

.timeline-event-card {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.5rem;
}

.timeline-event-time {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-accent);
  margin-bottom: 0.4rem;
}

.timeline-event-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.8rem;
}

.timeline-event-desc {
  font-size: 1.02rem;
  line-height: 1.65;
  color: var(--text-secondary);
}

/* Sources & Methodology Ledger */
.ledger-section {
  background-color: var(--bg-surface-elevated);
  border-top: 1px solid var(--border-subtle);
  padding: 4rem 0 5rem;
}

.ledger-title {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 2rem;
}

.src-row {
  margin-bottom: 1.8rem;
  padding-bottom: 1.8rem;
  border-bottom: 1px solid var(--border-subtle);
}
.src-row:last-child {
  border-bottom: none;
}

.src-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-accent);
  margin-bottom: 0.4rem;
}

.src-text {
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0.4rem;
}

.src-meta {
  font-family: var(--font-sans);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Footer */
footer.site-footer {
  background: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 2.5rem 0 3.5rem;
  font-family: var(--font-sans);
  font-size: 0.88rem;
  color: var(--text-muted);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-inner a {
  color: var(--text-secondary);
  text-decoration: none;
  transition: color 0.15s ease;
}
.footer-inner a:hover {
  color: var(--text-accent);
}

/* Back to Top Button */
.totop {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: 50%;
  background: var(--text-primary);
  color: var(--bg-app);
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-size: 1.2rem;
  font-weight: 700;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  box-shadow: var(--shadow-md);
  z-index: 90;
  border: none;
  cursor: pointer;
}
.totop.visible {
  opacity: 0.9;
  pointer-events: auto;
}
.totop:hover {
  opacity: 1;
  transform: translateY(-2px);
}

/* Responsive Overrides */
@media (max-width: 768px) {
  html {
    font-size: 16.5px;
  }
  .stratigraphy-layout {
    grid-template-columns: 1fr;
  }
  .depth-selector {
    border-right: none;
    border-bottom: 1px solid var(--border-subtle);
    padding-right: 0;
    padding-bottom: 1.2rem;
    flex-direction: row;
    overflow-x: auto;
  }
  .depth-btn {
    min-width: 140px;
  }
  .yard-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero {
    padding-top: 3rem;
    padding-bottom: 2.5rem;
  }
  .hero-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.6rem;
  }
  .widget-box {
    padding: 1.2rem;
  }
}