/* ==========================================================================
   Stiluri pentru „Două căi ferate în aceeași companie” (Two Railways)
   Design System: Dispecerat feroviar tehnic / Panou de macaz & semnalizare
   ========================================================================== */

:root {
  --bg-main: #0c1017;
  --bg-surface: #151b23;
  --bg-card: #1c2430;
  --bg-card-hover: #232d3d;
  --bg-inset: #090d13;
  
  --border-subtle: #2d3748;
  --border-strong: #4a5568;
  
  --text-primary: #f0f6fc;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  
  --commercial-blue: #38bdf8;
  --commercial-glow: rgba(56, 189, 248, 0.25);
  
  --military-amber: #fbbf24;
  --military-glow: rgba(251, 191, 36, 0.25);
  
  --public-green: #34d399;
  --public-green-bg: rgba(52, 211, 153, 0.12);
  
  --opaque-red: #fb7185;
  --opaque-red-bg: rgba(251, 113, 133, 0.12);

  --accent-rail: #64748b;
  --track-active: #e2e8f0;
  
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
  
  --max-width: 860px;
  --wide-width: 1040px;
}

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

html {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image: 
    radial-gradient(circle at 50% 0%, rgba(56, 189, 248, 0.04) 0%, transparent 60%),
    linear-gradient(to bottom, transparent, var(--bg-main) 300px);
}

a {
  color: var(--commercial-blue);
  text-decoration: none;
  transition: color 0.15s ease, border-bottom 0.15s ease;
}

a:hover {
  color: #7dd3fc;
  text-decoration: underline;
}

/* Header & Top Bar */
.top-bar {
  border-bottom: 1px solid var(--border-subtle);
  background-color: rgba(12, 16, 23, 0.85);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 100;
}

.top-bar-inner {
  max-width: var(--wide-width);
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.brand-link {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand-link:hover {
  color: var(--text-primary);
  text-decoration: none;
}

.lang-switch {
  display: flex;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
}

.lang-btn {
  padding: 0.25rem 0.625rem;
  border-radius: 4px;
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  background: var(--bg-surface);
  text-decoration: none;
  font-weight: 500;
}

.lang-btn:hover {
  border-color: var(--border-strong);
  color: var(--text-primary);
  text-decoration: none;
}

.lang-btn.active {
  background: var(--bg-card);
  border-color: var(--commercial-blue);
  color: var(--commercial-blue);
  font-weight: 600;
}

/* Main Container */
main {
  flex: 1;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
  width: 100%;
}

.wide-container {
  max-width: var(--wide-width);
  margin-left: auto;
  margin-right: auto;
}

/* Hero Section */
.hero {
  margin-bottom: 3.5rem;
}

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.25rem 0.625rem;
  border-radius: 9999px;
  background: rgba(251, 191, 36, 0.12);
  color: var(--military-amber);
  border: 1px solid rgba(251, 191, 36, 0.3);
  margin-bottom: 1.25rem;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--military-amber);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.85); }
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: #ffffff;
  margin-bottom: 1.25rem;
}

.hero-subtitle {
  font-size: 1.25rem;
  line-height: 1.5;
  color: var(--text-secondary);
  font-weight: 400;
  margin-bottom: 2rem;
}

/* Key Metrics Grid */
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.metric-card {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 1.125rem 1rem;
  display: flex;
  flex-direction: column;
}

.metric-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.metric-value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.25rem;
}

.metric-value.highlight-blue {
  color: var(--commercial-blue);
}

.metric-value.highlight-amber {
  color: var(--military-amber);
}

.metric-footnote {
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.35;
}

/* Interactive Dispatch Board */
.interactive-section {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 1.75rem;
  margin-bottom: 3.5rem;
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.section-title-wrap {
  margin-bottom: 1.5rem;
}

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

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.section-desc {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  margin-top: 0.375rem;
}

/* Switchboard Container */
.switchboard {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  background: var(--bg-inset);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 1.25rem;
  margin-bottom: 1.5rem;
}

.track-line {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

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

.track-name {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.track-name.commercial {
  color: var(--commercial-blue);
}

.track-name.military {
  color: var(--military-amber);
}

.track-tag {
  font-size: 0.6875rem;
  padding: 0.125rem 0.375rem;
  border-radius: 4px;
  font-family: var(--font-mono);
}

.track-tag.commercial {
  background: rgba(56, 189, 248, 0.15);
  color: var(--commercial-blue);
  border: 1px solid rgba(56, 189, 248, 0.3);
}

.track-tag.military {
  background: rgba(251, 191, 36, 0.15);
  color: var(--military-amber);
  border: 1px solid rgba(251, 191, 36, 0.3);
}

.flow-nodes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 0.5rem;
  position: relative;
}

.flow-node {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 0.625rem 0.75rem;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
  text-align: left;
}

.flow-node:hover, .flow-node:focus-visible {
  background: var(--bg-card-hover);
  border-color: var(--track-active);
  transform: translateY(-2px);
  outline: none;
}

.flow-node.selected {
  border-color: var(--commercial-blue);
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.3);
}

.flow-node.selected.military-node {
  border-color: var(--military-amber);
  box-shadow: 0 0 0 2px rgba(251, 191, 36, 0.3);
}

.node-title {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 0.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.node-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.status-public {
  background: var(--public-green);
  box-shadow: 0 0 6px rgba(52, 211, 153, 0.6);
}

.status-opaque {
  background: var(--opaque-red);
  box-shadow: 0 0 6px rgba(251, 113, 133, 0.6);
}

.node-desc {
  font-size: 0.6875rem;
  color: var(--text-muted);
  line-height: 1.3;
}

.shared-base {
  border-top: 1px dashed var(--border-subtle);
  padding-top: 1rem;
}

.shared-title {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-secondary);
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Inspector Drawer */
.inspector-card {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 1.25rem;
  transition: opacity 0.2s ease;
}

.inspector-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 0.75rem;
  gap: 1rem;
}

.inspector-title {
  font-size: 1.0625rem;
  font-weight: 700;
  color: #ffffff;
}

.inspector-badge {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 600;
  padding: 0.25rem 0.5rem;
  border-radius: 4px;
  white-space: nowrap;
}

.badge-public {
  background: var(--public-green-bg);
  color: var(--public-green);
  border: 1px solid rgba(52, 211, 153, 0.3);
}

.badge-opaque {
  background: var(--opaque-red-bg);
  color: var(--opaque-red);
  border: 1px solid rgba(251, 113, 133, 0.3);
}

.inspector-body {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.55;
  margin-bottom: 0.75rem;
}

.inspector-source {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  padding-top: 0.5rem;
}

/* Simulator Section */
.simulator-container {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.sim-controls {
  background: var(--bg-inset);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 1.25rem;
}

.sim-control-group {
  margin-bottom: 1.25rem;
}

.sim-control-group:last-child {
  margin-bottom: 0;
}

.sim-label-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 0.5rem;
}

.sim-label {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-primary);
}

.sim-val-display {
  font-family: var(--font-mono);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--military-amber);
}

.sim-slider {
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: #334155;
  outline: none;
  -webkit-appearance: none;
  appearance: none;
  cursor: pointer;
}

.sim-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--military-amber);
  cursor: pointer;
  box-shadow: 0 0 8px rgba(251, 191, 36, 0.6);
  border: 2px solid #000;
}

.sim-slider::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--military-amber);
  cursor: pointer;
  box-shadow: 0 0 8px rgba(251, 191, 36, 0.6);
  border: 2px solid #000;
}

.model-toggle-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.model-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 6px;
  padding: 0.75rem;
  text-align: left;
  cursor: pointer;
  transition: all 0.2s ease;
}

.model-btn:hover {
  border-color: var(--border-strong);
}

.model-btn.active {
  background: var(--bg-card-hover);
  border-color: var(--commercial-blue);
  box-shadow: 0 0 0 1px var(--commercial-blue);
}

.model-btn-title {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.25rem;
}

.model-btn-desc {
  font-size: 0.6875rem;
  color: var(--text-muted);
  line-height: 1.35;
}

/* Simulator Readouts */
.sim-readout-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
}

.sim-readout-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 1.125rem 1rem;
}

.sim-readout-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 0.375rem;
}

.sim-readout-val {
  font-family: var(--font-mono);
  font-size: 1.375rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 0.25rem;
}

.sim-readout-note {
  font-size: 0.75rem;
  color: var(--text-secondary);
  line-height: 1.35;
}

/* Editorial Content */
.prose {
  margin-bottom: 3.5rem;
}

.prose h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: #ffffff;
  margin-top: 2.5rem;
  margin-bottom: 1rem;
  letter-spacing: -0.015em;
  border-bottom: 1px solid var(--border-subtle);
  padding-bottom: 0.5rem;
}

.prose h3 {
  font-size: 1.1875rem;
  font-weight: 600;
  color: #f1f5f9;
  margin-top: 1.5rem;
  margin-bottom: 0.75rem;
}

.prose p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 1.25rem;
}

.prose strong {
  color: var(--text-primary);
  font-weight: 600;
}

.prose ul, .prose ol {
  margin-bottom: 1.25rem;
  padding-left: 1.5rem;
  color: var(--text-secondary);
}

.prose li {
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

.quote-box {
  background: var(--bg-surface);
  border-left: 3px solid var(--military-amber);
  border-radius: 0 8px 8px 0;
  padding: 1rem 1.25rem;
  margin: 1.5rem 0;
  font-style: italic;
  color: var(--text-primary);
}

.quote-source {
  display: block;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* Comparison Table */
.table-wrapper {
  overflow-x: auto;
  margin: 1.5rem 0;
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  text-align: left;
}

th {
  background: var(--bg-inset);
  color: var(--text-primary);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
}

td {
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}

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

tr:hover td {
  background: rgba(255, 255, 255, 0.02);
}

/* Method Note Section */
.method-box {
  background: var(--bg-inset);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 1.5rem;
  margin-top: 3rem;
}

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

.method-content {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.method-content p {
  margin-bottom: 0.75rem;
}

.method-content p:last-child {
  margin-bottom: 0;
}

/* Footer */
footer {
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-surface);
  padding: 2rem 1.25rem;
  margin-top: auto;
}

.footer-inner {
  max-width: var(--wide-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

@media (min-width: 640px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

.footer-links {
  display: flex;
  gap: 1.25rem;
  list-style: none;
}

.footer-links a {
  color: var(--text-secondary);
}

.footer-links a:hover {
  color: var(--text-primary);
}

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

/* Mobile Adjustments (390px) */
@media (max-width: 640px) {
  main {
    padding: 1.5rem 1rem 3rem;
  }
  
  .interactive-section {
    padding: 1.25rem 1rem;
  }
  
  .flow-nodes {
    grid-template-columns: 1fr;
  }
  
  .model-toggle-row {
    grid-template-columns: 1fr;
  }
  
  .metrics-grid {
    grid-template-columns: 1fr 1fr;
  }
}