:root {
  --ground: #0c0d10;
  --panel: #15171d;
  --panel-raised: #1a1d24;
  --ink: #e8e6e1;
  --muted: #8b8e96;
  --faint: #3c404a;
  --hairline: #262a33;
  --edge: #1d212a;

  --signal: #ffb000;
  --register: #4d7cfe;
  --accent: var(--register);

  --font-display: 'Archivo Black', 'Archivo', sans-serif;
  --font-body: 'Archivo', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'Space Mono', ui-monospace, monospace;

  --ease-snap: cubic-bezier(0.83, 0, 0.17, 1);
}

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

html {
  background: var(--ground);
  color: var(--ink);
  font-family: var(--font-body);
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  background: var(--ground);
  overflow-x: hidden;
}

::selection {
  background: var(--signal);
  color: var(--ground);
}

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 3px;
}

/* Drafting Frame — fixed corner ticks */
.draft-frame {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 90;
}
.draft-frame::before,
.draft-frame::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid var(--register);
  opacity: 0.6;
}
.draft-frame::before { top: 12px; left: 12px; border-right: none; border-bottom: none; }
.draft-frame::after { bottom: 12px; right: 12px; border-left: none; border-top: none; }

/* Signal Rail — vertical tracking rule */
.signal-rail {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 26px;
  width: 1px;
  background: var(--hairline);
  z-index: 80;
  pointer-events: none;
}
.signal-tick {
  position: absolute;
  left: -4px;
  top: 0;
  width: 9px;
  height: 9px;
  background: var(--signal);
  transition: top 0.1s linear;
}

/* Pinned Nav — printed header */
.showcase-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--ground);
  border-bottom: 1px solid var(--hairline);
}

.showcase-nav__inner {
  max-width: 1300px;
  margin: 0 auto;
  padding: 16px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.showcase-nav__brand {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
}

.showcase-nav__counter {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}
.showcase-nav__counter .faint {
  color: var(--faint);
}

.showcase-nav__github {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid var(--hairline);
  padding: 8px 14px;
  transition: color 0.2s ease, border-color 0.2s ease;
}
.showcase-nav__github:hover {
  color: var(--signal);
  border-color: var(--signal);
}

.scroll-progress-bar {
  position: absolute;
  left: 0;
  bottom: -1px;
  height: 2px;
  width: 0%;
  background: var(--signal);
  transition: width 0.1s linear;
}

/* Showcase Main Grid & Sections */
.showcase {
  position: relative;
  z-index: 1;
  padding-top: 56px;
}

.section {
  min-height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 96px 32px;
  opacity: 0.35;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease-snap), transform 0.7s var(--ease-snap);
}

.section.active {
  opacity: 1;
  transform: translateY(0);
}

/* Giant watermark index numeral */
.section::before {
  content: attr(data-index);
  position: absolute;
  top: 50%;
  left: 24px;
  transform: translateY(-50%);
  font-family: var(--font-display);
  font-size: clamp(220px, 32vw, 460px);
  line-height: 1;
  color: var(--accent);
  opacity: 0.07;
  pointer-events: none;
  user-select: none;
  white-space: nowrap;
}

.section__sticky {
  position: relative;
  max-width: 1240px;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 64px;
  align-items: center;
}

/* Metadata / Left Column */
.section__meta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.project-pill {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  padding: 6px 12px;
  margin-bottom: 28px;
  color: var(--accent);
  border: 1px solid var(--accent);
  background: transparent;
}
.project-pill::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--accent);
}

.project-title {
  font-family: var(--font-display);
  font-size: clamp(38px, 4.5vw, 58px);
  font-weight: 400;
  line-height: 1.04;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  margin-bottom: 24px;
}

.gradient-text {
  color: var(--accent);
  -webkit-text-fill-color: currentColor;
}

.project-description {
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
  margin-bottom: 30px;
  max-width: 460px;
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 40px;
}
.tech-stack span {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 400;
  padding: 4px 8px;
  color: var(--muted);
  border: 1px solid var(--hairline);
}

.action-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 20px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  text-decoration: none;
  color: var(--accent);
  border: 1px solid var(--accent);
  background: transparent;
  transition: background 0.2s var(--ease-snap), color 0.2s var(--ease-snap), transform 0.2s var(--ease-snap);
}
.action-btn:hover {
  background: var(--accent);
  color: var(--ground);
  transform: translate(2px, 2px);
}
.action-btn .arrow { transition: transform 0.2s ease; }
.action-btn:hover .arrow { transform: translateX(4px); }

/* Demo Plate / Right Column */
.section__interactive {
  display: flex;
  justify-content: center;
  align-items: center;
}

.glass-panel {
  background: var(--panel);
  border: 1px solid var(--hairline);
  width: 100%;
  overflow: hidden;
  box-shadow: 12px 12px 0 var(--edge);
}

.center-content {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 26px;
}

/* CARD BAR */
.card-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  background: var(--panel-raised);
  border-bottom: 1px solid var(--hairline);
}
.dot {
  width: 7px;
  height: 7px;
  background: var(--faint);
}
.card-bar-title {
  margin-left: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}

/* DEMO 1: RAG CHAT */
.chat-viewport {
  padding: 22px;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.chat-bubble {
  max-width: 85%;
  padding: 11px 14px;
  border: 1px solid var(--hairline);
  font-size: 13px;
  line-height: 1.5;
}
.chat-bubble.user {
  align-self: flex-end;
  background: var(--accent);
  color: var(--ground);
  border-color: var(--accent);
}
.chat-bubble.system {
  align-self: flex-start;
  background: var(--panel-raised);
  color: var(--ink);
}
.chat-bubble.thinking {
  color: var(--signal);
  display: flex;
  align-items: center;
  gap: 8px;
}
.spinner {
  width: 12px;
  height: 12px;
  border: 2px solid var(--hairline);
  border-top-color: var(--signal);
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.chat-controls {
  display: flex;
  gap: 8px;
  padding: 0 22px 18px;
}
.chat-btn {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 6px 12px;
  border: 1px solid var(--hairline);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.2s ease;
}
.chat-btn.active, .chat-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.chat-btn.active { background: var(--accent); color: var(--ground); }

.metrics-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--hairline);
  background: var(--panel-raised);
}
.metric {
  padding: 16px;
  text-align: center;
  border-right: 1px solid var(--hairline);
}
.metric:last-child { border-right: none; }
.metric-val {
  display: block;
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
}
.metric-lbl {
  font-size: 9px;
  text-transform: uppercase;
  color: var(--muted);
  letter-spacing: 0.1em;
}

/* DEMO 2: VISION / YOLO */
.vision-stage {
  padding: 22px;
}
.vision-viewport {
  position: relative;
  width: 100%;
  height: 180px;
  background: #0a0b0e;
  border: 1px solid var(--hairline);
  overflow: hidden;
  margin-bottom: 16px;
}
.radar-line {
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--accent);
  animation: scanRadar 3s ease-in-out infinite;
}
@keyframes scanRadar {
  0% { top: 0%; opacity: 0; }
  50% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}
.yolo-box {
  position: absolute;
  border: 1.5px solid var(--accent);
  background: rgba(255, 255, 255, 0.02);
  animation: floatBox 4s ease-in-out infinite alternate;
}
.box-1 { top: 25%; left: 15%; width: 35%; height: 50%; }
.box-2 { top: 35%; left: 60%; width: 25%; height: 40%; animation-delay: 2s; }
.yolo-tag {
  position: absolute;
  top: -16px; left: 0;
  background: var(--accent);
  color: var(--ground);
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  padding: 2px 5px;
}
@keyframes floatBox {
  0% { transform: translate(0, 0); }
  100% { transform: translate(8px, 6px); }
}

.blip-stream {
  background: var(--panel-raised);
  padding: 14px;
  border: 1px solid var(--hairline);
}
.blip-badge {
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}
.blip-text {
  font-size: 13px;
  color: var(--ink);
}

.pipeline-track {
  display: flex;
  border-top: 1px solid var(--hairline);
  background: var(--panel-raised);
}
.p-step {
  flex: 1;
  padding: 12px;
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  text-align: center;
  color: var(--faint);
  border-right: 1px solid var(--hairline);
}
.p-step:last-child { border-right: none; }
.p-step.active { color: var(--accent); background: rgba(255, 255, 255, 0.03); }

/* DEMO 3: CHART */
.chart-header {
  padding: 18px 22px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.chart-title {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  color: var(--ink);
}
.chart-tabs { display: flex; gap: 6px; }
.chart-tab {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 4px 10px;
  border: 1px solid var(--hairline);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.2s ease;
}
.chart-tab:hover { border-color: var(--accent); color: var(--accent); }
.chart-tab.active {
  background: var(--accent);
  color: var(--ground);
  border-color: var(--accent);
}

.chart-bars-container {
  display: flex;
  align-items: flex-end;
  gap: 8px;
  height: 140px;
  padding: 14px 22px;
}
.chart-bar-wrap {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  height: 100%;
  justify-content: flex-end;
}
.chart-bar-fill {
  width: 100%;
  background: var(--accent);
  transition: height 0.6s var(--ease-snap);
}
.chart-bar-label {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--faint);
  margin-top: 6px;
}

.chart-stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--hairline);
  background: var(--panel-raised);
}
.c-stat {
  padding: 16px;
  text-align: center;
  border-right: 1px solid var(--hairline);
}
.c-stat:last-child { border-right: none; }
.c-stat strong { display: block; font-family: var(--font-mono); font-size: 20px; color: var(--ink); }
.c-stat span { font-size: 9px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.06em; }

/* DEMO 4: IR HAND VISUALIZER */
.ir-hand-canvas-wrap {
  position: relative;
  width: 100%;
  max-width: 380px;
  background: #0a0b0e;
  border: 1px solid var(--hairline);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
}
#ir-canvas {
  width: 100%;
  height: auto;
  display: block;
}
.ir-hud {
  width: 100%;
  display: flex;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--panel-raised);
  border-top: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 9px;
  font-weight: 700;
  color: var(--accent);
}
.dot-live {
  display: inline-block;
  width: 6px; height: 6px;
  background: var(--signal);
  animation: pulse 1.2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.2; }
}

/* DEMO 5: WEB3 CARD */
.web3-interactive-card {
  perspective: 1200px;
  width: 100%;
  max-width: 380px;
}
.web3-card-inner {
  background: var(--panel-raised);
  border: 1px solid var(--hairline);
  padding: 24px;
  box-shadow: 10px 10px 0 var(--edge);
  transition: transform 0.4s var(--ease-snap);
}
.web3-card-inner:hover {
  transform: translateY(-4px) translateX(-4px);
}
.web3-chip {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 20px;
}
.web3-nodes {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}
.node-item {
  display: flex;
  justify-content: space-between;
  padding: 10px 14px;
  background: var(--panel);
  border: 1px solid var(--hairline);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}
.node-item strong { color: var(--ink); font-weight: 700; }
.node-item.glow {
  border-color: var(--accent);
  background: rgba(255, 255, 255, 0.03);
}
.web3-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}
.web3-status-dot {
  width: 8px; height: 8px;
  background: var(--accent);
  animation: pulse 1.2s ease-in-out infinite;
}

/* DEMO 6: ATTRACTOR */
.attractor-wrap {
  position: relative;
  width: 100%;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
#attractor-canvas-3d {
  width: 100%;
  aspect-ratio: 1;
  background: #0a0b0e;
  border: 1px solid var(--hairline);
}
.attractor-controls {
  display: flex;
  gap: 8px;
  margin-top: 14px;
}
.sys-btn {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 6px 14px;
  border: 1px solid var(--hairline);
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  transition: all 0.2s ease;
}
.sys-btn:hover { border-color: var(--accent); color: var(--accent); }
.sys-btn.active {
  background: var(--accent);
  color: var(--ground);
  border-color: var(--accent);
}

/* DEMO 7: THREE BODY */
.threebody-wrap {
  width: 100%;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
#threebody-canvas-2d {
  width: 100%;
  aspect-ratio: 1;
  background: #0a0b0e;
  border: 1px solid var(--hairline);
}
.threebody-legend {
  display: flex;
  gap: 14px;
  margin-top: 14px;
  font-family: var(--font-mono);
  font-size: 10px;
}
.legend-dot {
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 6px;
}
.legend-dot::before {
  content: '';
  width: 8px; height: 8px;
  background: var(--accent);
}
.legend-dot.body-a::before { background: #ffb000; }
.legend-dot.body-b::before { background: #8b5cf6; }
.legend-dot.body-c::before { background: #4ad970; }

/* RESPONSIVE DESIGN */
@media (max-width: 1024px) {
  .section__sticky {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .section {
    padding: 72px 24px;
    min-height: auto;
  }
  .section::before {
    font-size: clamp(160px, 30vw, 300px);
    left: 12px;
  }
  .signal-rail { left: 14px; }
  .signal-tick { left: -4px; }
}

@media (max-width: 600px) {
  .project-title { font-size: 32px; }
  .showcase-nav__inner { padding: 12px 16px; }
  .showcase-nav__github { padding: 6px 10px; font-size: 11px; }
  .section { padding: 48px 16px; }
  .action-btn { width: 100%; justify-content: center; }
  .section::before { font-size: 140px; }
  .draft-frame { display: none; }
  .signal-rail { display: none; }
}

/* REDUCED MOTION */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .section,
  .section.active {
    opacity: 1;
    transform: none;
    transition: none;
  }
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}