:root {
  --bg-abyss: #07080b;
  --bg-metal: #0d1117;
  --bg-card: #121720;
  --bg-dossier: #181f2a;
  
  --border-metal: #232d3b;
  --border-active: #d97736;
  --border-light: rgba(255, 255, 255, 0.08);

  --amber-glow: #e58e26;
  --amber-dim: #995b16;
  --red-soviet: #b33939;
  --red-bright: #e74c3c;
  --cyan-radio: #54a0ff;
  
  --text-main: #d2dae2;
  --text-dim: #718093;
  --text-bright: #f5f6fa;
  
  --font-mono: 'IBM Plex Mono', 'Courier New', monospace;
  --font-display: 'Oswald', 'Impact', sans-serif;
  --font-typewriter: 'Special Elite', 'Courier Prime', monospace;
  
  --header-height: 60px;
}

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

body {
  background-color: var(--bg-abyss);
  color: var(--text-main);
  font-family: var(--font-mono);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  background-image: 
    radial-gradient(ellipse at 50% 0%, rgba(20, 30, 45, 0.5) 0%, transparent 75%),
    linear-gradient(to bottom, #090c10 0%, #050608 100%);
}

/* CRT Scanline & Noise Overlays */
.crt-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9999;
  background: linear-gradient(
    rgba(18, 16, 16, 0) 50%, 
    rgba(0, 0, 0, 0.25) 50%
  );
  background-size: 100% 4px;
  opacity: 0.75;
  transition: opacity 0.3s ease;
}

body:not(.crt-enabled) .crt-overlay {
  opacity: 0;
}

.vignette-overlay {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 9998;
  background: radial-gradient(circle at center, transparent 60%, rgba(0, 0, 0, 0.75) 100%);
}

/* Telemetry Signal Line / Progress Bar */
.signal-line {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  background: var(--amber-glow);
  width: 0%;
  z-index: 2000;
  box-shadow: 0 0 12px var(--amber-glow), 0 0 4px #fff;
  transition: width 0.1s ease-out;
}

/* Terminal Header */
.terminal-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(10, 14, 20, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-metal);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  z-index: 1500;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.7);
}

.header-section {
  display: flex;
  align-items: center;
}

.branding {
  gap: 0.85rem;
}

.soviet-star {
  font-size: 1.5rem;
  color: var(--red-bright);
  text-shadow: 0 0 10px rgba(231, 76, 60, 0.6);
  cursor: default;
  line-height: 1;
}

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

.callsign {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--text-bright);
  line-height: 1.1;
}

.location {
  font-size: 0.65rem;
  color: var(--text-dim);
  letter-spacing: 1.5px;
}

.classification-tag {
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 1.5px;
  background: rgba(179, 57, 57, 0.2);
  color: var(--red-bright);
  border: 1px solid var(--red-soviet);
  padding: 0.2rem 0.45rem;
  text-transform: uppercase;
  margin-left: 0.5rem;
}

/* Center Telemetry */
.telemetry {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}

.frequency-indicator {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.72rem;
  color: var(--cyan-radio);
  letter-spacing: 1px;
}

.freq-led {
  width: 6px;
  height: 6px;
  background-color: var(--cyan-radio);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--cyan-radio);
  animation: pulse-led 1.8s infinite ease-in-out;
}

@keyframes pulse-led {
  0%, 100% { opacity: 0.4; transform: scale(0.9); }
  50% { opacity: 1; transform: scale(1.1); box-shadow: 0 0 12px var(--cyan-radio); }
}

.status-quote {
  font-size: 0.68rem;
  color: var(--amber-glow);
  letter-spacing: 1px;
  font-style: italic;
  opacity: 0.85;
}

/* Right Controls */
.terminal-controls {
  gap: 0.6rem;
}

.tape-deck {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  background: #070a0e;
  padding: 0.25rem 0.65rem;
  border: 1px solid var(--border-metal);
  margin-right: 0.5rem;
}

.tape-label {
  font-size: 0.6rem;
  color: var(--text-dim);
  letter-spacing: 1px;
}

.tape-counter {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--amber-glow);
  letter-spacing: 1.5px;
  text-shadow: 0 0 8px rgba(229, 142, 38, 0.4);
}

/* Analog Buttons */
.analog-btn {
  background: rgba(18, 23, 32, 0.7);
  color: var(--text-main);
  border: 1px solid var(--border-metal);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 1px;
  padding: 0.35rem 0.65rem;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 2px;
  transition: all 0.15s ease;
  user-select: none;
}

.analog-btn .btn-bracket {
  color: var(--text-dim);
}

.analog-btn:hover {
  background: #1e2634;
  border-color: var(--amber-glow);
  color: var(--amber-glow);
  box-shadow: 0 0 10px rgba(229, 142, 38, 0.25);
}

.analog-btn.active {
  border-color: var(--cyan-radio);
  color: var(--cyan-radio);
}

/* Main Viewport */
.terminal-viewport {
  margin-top: var(--header-height);
  min-height: calc(100vh - var(--header-height) - 40px);
  display: flex;
  justify-content: center;
}

/* Stream Layout (Film Strip) */
.stream-layout {
  width: 100%;
  max-width: 1060px;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 2rem 1.25rem 5rem 1.25rem;
  gap: 2rem;
}

.panel-card {
  width: 100%;
  background: #0a0d13;
  border: 1px solid #1e2735;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.85);
  position: relative;
  cursor: zoom-in;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.panel-card:hover {
  border-color: var(--amber-glow);
  transform: translateY(-2px);
  box-shadow: 0 15px 50px rgba(0, 0, 0, 0.95), 0 0 25px rgba(229, 142, 38, 0.15);
}

/* Industrial Corner Crosshairs */
.panel-card::before, .panel-card::after {
  content: '';
  position: absolute;
  width: 8px;
  height: 8px;
  pointer-events: none;
}

.panel-card::before {
  top: -1px; left: -1px;
  border-top: 2px solid var(--amber-dim);
  border-left: 2px solid var(--amber-dim);
}

.panel-card::after {
  bottom: -1px; right: -1px;
  border-bottom: 2px solid var(--amber-dim);
  border-right: 2px solid var(--amber-dim);
}

.panel-header-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.35rem 0.85rem;
  background: #0f141d;
  border-bottom: 1px solid #1a2230;
  font-size: 0.65rem;
  color: var(--text-dim);
  letter-spacing: 1px;
}

.panel-header-strip .sheet-num {
  color: var(--amber-glow);
  font-weight: 600;
}

.panel-img {
  width: 100%;
  height: auto;
  display: block;
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
  background-color: #0d1117;
}

.panel-img.loaded {
  opacity: 1;
}

/* Single Frame Mode */
.single-layout {
  width: 100%;
  height: calc(100vh - var(--header-height));
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.single-slide-wrapper {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.single-img-stage {
  max-width: 95%;
  max-height: 88vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-metal);
  background: #080b0f;
  padding: 8px;
  box-shadow: 0 10px 50px rgba(0, 0, 0, 0.9);
  cursor: zoom-in;
}

.reel-frame-corner {
  position: absolute;
  width: 12px;
  height: 12px;
  pointer-events: none;
}
.reel-frame-corner.top-left { top: 2px; left: 2px; border-top: 2px solid var(--amber-glow); border-left: 2px solid var(--amber-glow); }
.reel-frame-corner.top-right { top: 2px; right: 2px; border-top: 2px solid var(--amber-glow); border-right: 2px solid var(--amber-glow); }
.reel-frame-corner.bottom-left { bottom: 2px; left: 2px; border-bottom: 2px solid var(--amber-glow); border-left: 2px solid var(--amber-glow); }
.reel-frame-corner.bottom-right { bottom: 2px; right: 2px; border-bottom: 2px solid var(--amber-glow); border-right: 2px solid var(--amber-glow); }

.single-page-img {
  max-width: 100%;
  max-height: 84vh;
  object-fit: contain;
  display: block;
}

.slide-nav-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(13, 17, 23, 0.85);
  border: 1px solid var(--border-metal);
  color: var(--text-main);
  padding: 1.25rem 0.75rem;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  transition: all 0.2s ease;
  z-index: 10;
}

.slide-nav-btn .nav-arrow { font-size: 1.4rem; color: var(--amber-glow); }
.slide-nav-btn .nav-sub { font-size: 0.6rem; letter-spacing: 1px; color: var(--text-dim); }

.slide-nav-btn:hover {
  background: #18202c;
  border-color: var(--amber-glow);
  box-shadow: 0 0 15px rgba(229, 142, 38, 0.3);
}

.slide-nav-btn.prev { left: 1.5rem; }
.slide-nav-btn.next { right: 1.5rem; }

/* Dossier Drawer */
.dossier-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: min(100%, 460px);
  background: #0b0f16;
  border-left: 1px solid var(--border-metal);
  z-index: 2100;
  display: flex;
  flex-direction: column;
  box-shadow: -15px 0 40px rgba(0, 0, 0, 0.9);
  transform: translateX(0);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.dossier-drawer.hidden {
  transform: translateX(100%);
  display: flex;
}

.drawer-header {
  padding: 1.25rem;
  border-bottom: 1px solid var(--border-metal);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  background: #0f141d;
}

.stamp-red {
  font-size: 0.65rem;
  color: var(--red-bright);
  letter-spacing: 1.5px;
  font-weight: 700;
  border: 1px solid var(--red-soviet);
  padding: 2px 6px;
  display: inline-block;
  margin-bottom: 0.4rem;
}

.drawer-header h2 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 1.5px;
  color: var(--text-bright);
}

.drawer-info-bar {
  padding: 0.5rem 1.25rem;
  background: #07090e;
  border-bottom: 1px solid #18202c;
  font-size: 0.62rem;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
  letter-spacing: 1px;
}

.thumbnail-grid {
  flex: 1;
  overflow-y: auto;
  padding: 1rem;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.85rem;
}

.thumb-item {
  position: relative;
  background: #06080c;
  border: 1px solid #1c2432;
  cursor: pointer;
  aspect-ratio: 16/10;
  overflow: hidden;
  transition: all 0.2s ease;
}

.thumb-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  opacity: 0.7;
  transition: opacity 0.2s ease;
}

.thumb-item:hover img, .thumb-item.active img {
  opacity: 1;
}

.thumb-item:hover, .thumb-item.active {
  border-color: var(--amber-glow);
  box-shadow: 0 0 12px rgba(229, 142, 38, 0.35);
  transform: scale(1.02);
}

.thumb-item .thumb-label {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(7, 10, 14, 0.85);
  font-size: 0.65rem;
  padding: 2px 6px;
  display: flex;
  justify-content: space-between;
  color: var(--text-dim);
}

.drawer-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  backdrop-filter: blur(4px);
  z-index: 2050;
  opacity: 1;
  transition: opacity 0.3s ease;
}

.drawer-backdrop.hidden {
  opacity: 0;
  pointer-events: none;
}

/* Lightbox Modal */
.lightbox-overlay {
  position: fixed;
  inset: 0;
  background: rgba(4, 6, 9, 0.96);
  backdrop-filter: blur(16px);
  z-index: 2500;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-controls {
  position: absolute;
  top: 1.25rem;
  right: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  z-index: 2510;
}

.dossier-stamp {
  font-size: 0.7rem;
  color: var(--cyan-radio);
  border: 1px solid rgba(84, 160, 255, 0.4);
  padding: 0.25rem 0.55rem;
  letter-spacing: 1.5px;
}

.lightbox-counter {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--amber-glow);
  letter-spacing: 1.5px;
}

.lightbox-stage {
  max-width: 96vw;
  max-height: 92vh;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-metal);
  box-shadow: 0 0 60px rgba(0, 0, 0, 0.95);
  background: #080b0f;
  padding: 6px;
}

.lightbox-stage img {
  max-width: 100%;
  max-height: 90vh;
  object-fit: contain;
  display: block;
}

.lightbox-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(13, 17, 23, 0.8);
  border: 1px solid var(--border-metal);
  color: var(--amber-glow);
  font-size: 2rem;
  width: 50px;
  height: 80px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
  z-index: 2510;
}

.lightbox-nav:hover {
  background: #1a222e;
  border-color: var(--amber-glow);
}

.lightbox-nav.prev { left: 1.5rem; }
.lightbox-nav.next { right: 1.5rem; }

/* Footer */
.terminal-footer {
  border-top: 1px solid var(--border-metal);
  background: #080b0f;
  padding: 1.25rem 1rem;
  text-align: center;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.5rem;
  font-size: 0.68rem;
  color: var(--text-dim);
  letter-spacing: 1px;
}

.hidden {
  display: none !important;
}

@media (max-width: 768px) {
  .status-quote, .classification-tag { display: none; }
  .branding { gap: 0.5rem; }
  .callsign { font-size: 1.1rem; }
  .location { display: none; }
  .slide-nav-btn { padding: 0.75rem 0.4rem; }
  .slide-nav-btn.prev { left: 0.5rem; }
  .slide-nav-btn.next { right: 0.5rem; }
  .lightbox-nav { display: none; }
  .terminal-header { padding: 0 0.75rem; }
}