@import url('https://fonts.googleapis.com/css2?family=Space+Mono:wght@400;700&family=IBM+Plex+Mono:wght@400;500&family=Share+Tech+Mono&display=swap');

:root {
  --bunker-black: #0E0E12;
  --gunmetal-deep: #1A1A1E;
  --slate-oxide: #26262C;
  --chrome-bright: #C0C0C8;
  --dulled-nickel: #8A8A94;
  --tarnished-zinc: #5C5C66;
  --signal-red: #FF3B3B;
  --interference-blue: #3B8BFF;
  --phosphor-green: #3BFF7B;
  --brushed-steel: #3A3A42;
  --oxidized-chrome: #D4D4DC;
}

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

html, body {
  width: 100%;
  height: 100%;
  background: var(--bunker-black);
  color: var(--chrome-bright);
  font-family: 'IBM Plex Mono', monospace;
  overflow: hidden;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: repeating-linear-gradient(to bottom, transparent 0px, transparent 2px, rgba(0,0,0,0.08) 2px, rgba(0,0,0,0.04) 4px);
  pointer-events: none;
  z-index: 500;
}

/* Signal Bar */
.signal-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 2rem;
  background: var(--gunmetal-deep);
  border-bottom: 1px solid rgba(192, 197, 206, 0.2);
  z-index: 1000;
  font-family: 'Space Mono', monospace;
  font-size: 14px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.signal-left {
  font-weight: 400;
}

.signal-right {
  display: flex;
  gap: 0.8rem;
}

.frame-indicator {
  width: 12px;
  height: 4px;
  background: transparent;
  border: 1px solid var(--chrome-bright);
  border-color: rgba(192, 197, 206, 0.3);
  transition: all 0.3s ease;
}

.frame-indicator.active {
  background: var(--chrome-bright);
  width: 20px;
  border-color: var(--chrome-bright);
}

/* Tape Reel */
.tape-reel {
  position: fixed;
  inset: 48px 0 36px 0;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 100%;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
}

.tape-reel::-webkit-scrollbar {
  height: 6px;
}

.tape-reel::-webkit-scrollbar-track {
  background: var(--bunker-black);
}

.tape-reel::-webkit-scrollbar-thumb {
  background: var(--brushed-steel);
}

.tape-reel::-webkit-scrollbar-thumb:hover {
  background: var(--dulled-nickel);
}

/* Frames */
.frame {
  scroll-snap-align: start;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  padding: 3rem;
  background: var(--bunker-black);
  border-right: 2px solid rgba(192, 197, 206, 0.2);
}

.frame-hero {
  display: grid;
  place-items: center;
  grid-template-columns: 1fr;
}

.frame-content {
  grid-template-columns: 2fr 1fr;
}

.frame-closing {
  grid-template-columns: 1fr;
  place-items: center;
  text-align: center;
}

.frame-main {
  padding-right: 2rem;
  border-right: 2px solid var(--brushed-steel);
}

.frame-monitor {
  padding-left: 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* Content */
.frame-heading {
  font-family: 'Space Mono', monospace;
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: headingReveal 0.6s ease-out forwards;
}

@keyframes headingReveal {
  to { opacity: 1; }
}

.frame p {
  font-size: clamp(0.9rem, 1.6vw, 1.05rem);
  line-height: 1.75;
  margin-bottom: 1rem;
  opacity: 0;
  animation: textReveal 0.6s ease-out 0.2s forwards;
}

@keyframes textReveal {
  to { opacity: 1; }
}

.hero-title {
  font-family: 'Space Mono', monospace;
  font-size: clamp(2.2rem, 5vw, 4.5rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-align: center;
  line-height: 1.2;
  margin-bottom: 1rem;
}

.hero-title span {
  display: block;
  opacity: 0;
  animation: titleCharReveal 0.05s ease-out forwards;
}

.hero-title span:nth-child(1) {
  animation-delay: 0.3s;
}

.hero-title span:nth-child(2) {
  animation-delay: 0.5s;
}

@keyframes titleCharReveal {
  to { opacity: 1; }
}

.hero-subtitle {
  font-family: 'IBM Plex Mono', monospace;
  font-size: clamp(0.8rem, 1.4vw, 1rem);
  letter-spacing: 0.08em;
  color: var(--dulled-nickel);
  text-align: center;
  opacity: 0;
  animation: subtitleReveal 0.6s ease-out 0.7s forwards;
}

@keyframes subtitleReveal {
  to { opacity: 1; }
}

.frame-content {
  max-width: 95vw;
}

.closing-content {
  max-width: 600px;
}

.closing-content p {
  text-align: center;
  margin-bottom: 1rem;
}

/* Monitor Blocks */
.monitor-block {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: baseline;
  padding: 0.8rem;
  background: rgba(38, 38, 44, 0.5);
  border: 1px solid var(--brushed-steel);
  border-radius: 2px;
  opacity: 0;
  animation: monitorReveal 0.6s ease-out forwards;
}

@keyframes monitorReveal {
  to { opacity: 1; }
}

.monitor-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--dulled-nickel);
  white-space: nowrap;
}

.monitor-value {
  font-weight: 500;
  color: var(--chrome-bright);
  text-align: right;
}

/* Frequency Band */
.frequency-band {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 36px;
  background: var(--gunmetal-deep);
  border-top: 1px solid rgba(192, 197, 206, 0.2);
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 2px;
  padding: 6px;
  z-index: 1000;
}

.frequency-bar {
  width: 2px;
  background: var(--chrome-bright);
  opacity: 0.6;
  border-radius: 1px;
  animation: waveform 1.5s ease-in-out infinite;
}

@keyframes waveform {
  0%, 100% { height: 4px; }
  50% { height: 18px; }
}

/* Responsive */
@media (max-width: 768px) {
  .tape-reel {
    grid-auto-flow: row;
    grid-auto-rows: 100%;
    overflow-x: hidden;
    overflow-y: auto;
  }

  .frame {
    grid-template-columns: 1fr;
    border-right: none;
    border-bottom: 2px solid var(--brushed-steel);
  }

  .frame-main {
    border-right: none;
    border-bottom: 2px solid var(--brushed-steel);
    padding-right: 0;
    padding-bottom: 2rem;
  }

  .frame-monitor {
    padding-left: 0;
    padding-top: 2rem;
    border-top: 2px solid var(--brushed-steel);
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}