@font-face {
  font-family: 'LXGW 975 Hei SC';
  src: local('LXGW 975 Hei SC'),
       local('975黑体 SC'),
       local('LXGW975HeiSC-Regular'),
       url('./fonts/LXGW975HeiSC-400W.ttf') format('truetype');
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'LXGW 975 Hei SC';
  src: local('LXGW 975 Hei SC Medium'),
       local('975黑体 SC Medium'),
       local('LXGW975HeiSC-Medium'),
       url('./fonts/LXGW975HeiSC-500W.ttf') format('truetype');
  font-weight: 500;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'LXGW 975 Hei SC';
  src: local('LXGW 975 Hei SC Bold'),
       local('975黑体 SC Bold'),
       local('LXGW975HeiSC-Bold'),
       url('./fonts/LXGW975HeiSC-700W.ttf') format('truetype');
  font-weight: 600 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg-void: #030305;
  --bg-card: rgba(14, 14, 22, 0.88);
  --border-dim: rgba(255, 255, 255, 0.16);
  --border-gold: rgba(255, 195, 110, 0.52);
  --gold-core: #ffb84d;
  --gold-bright: #ffedd5;
  --cyan-pass: #38bdf8;
  --emerald-ok: #34d399;
  --crimson-drop: #fb7185;
  --text-primary: #ffffff;
  --text-secondary: #c8c8d4;
  --text-muted: #8e8e9e;
  --font-display: 'Space Grotesk', 'LXGW 975 Hei SC', '975黑体 SC', 'LXGW975HeiSC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-sans: var(--font-display);
  --font-mono: 'JetBrains Mono', 'LXGW 975 Hei SC', '975黑体 SC', ui-monospace, SFMono-Regular, Menlo, monospace;
}

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

html {
  scroll-behavior: smooth;
  background-color: var(--bg-void);
  color: var(--text-primary);
  font-family: var(--font-display);
  -webkit-font-smoothing: antialiased;
}

body {
  background-color: var(--bg-void);
  overflow-x: hidden;
}

::selection {
  background: rgba(255, 174, 66, 0.28);
  color: #fff;
}

/* Top Bar */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 2.8rem;
  background: linear-gradient(180deg, rgba(3, 3, 5, 0.9) 0%, rgba(3, 3, 5, 0) 100%);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--text-primary);
  text-decoration: none;
}

.status-indicator-dot {
  width: 6px;
  height: 6px;
  background: var(--gold-core);
  box-shadow: 0 0 12px var(--gold-core);
}

body.airgap-active .status-indicator-dot {
  background: var(--crimson-drop);
  box-shadow: 0 0 14px var(--crimson-drop);
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.hud-btn {
  background: rgba(10, 10, 16, 0.75);
  border: 1px solid var(--border-dim);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  padding: 0.42rem 0.85rem;
  border-radius: 3px;
  cursor: pointer;
  text-decoration: none;
  backdrop-filter: blur(10px);
  transition: all 0.2s ease;
}

.hud-btn:hover {
  border-color: var(--border-gold);
  color: var(--gold-bright);
}

.hud-btn.active {
  background: rgba(244, 63, 94, 0.16);
  border-color: var(--crimson-drop);
  color: #fda4af;
}

/* ============================================================================
   HERO: Left (Host) -> Center (Black Hole Filter) -> Right (Claude Container)
   ============================================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  max-width: 1380px;
  margin: 0 auto;
  padding: 5.2rem 2.8rem 2.5rem;
  display: grid;
  grid-template-rows: auto 1fr auto;
  gap: 1.5rem;
}

.hero-header {
  text-align: center;
  position: relative;
  z-index: 10;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--gold-core);
  margin-bottom: 0.55rem;
}

.hero-title {
  font-size: clamp(2.1rem, 3.6vw, 3.35rem);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 0.5rem;
}

.hero-subtitle {
  font-size: 0.94rem;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.55;
}

/* 3-Column Interactive Singularity Diagram Stage */
.diagram-stage {
  position: relative;
  display: grid;
  grid-template-columns: 310px 1fr 310px;
  align-items: center;
  min-height: 460px;
}

/* WebGL Black Hole + Particle Stream Canvas sits behind the 3 columns */
#stage-canvas-wrap {
  position: absolute;
  inset: -30px -40px;
  z-index: 1;
  pointer-events: none;
}

#webgl-canvas, #flow-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

/* Left & Right Columns */
.stage-column {
  position: relative;
  z-index: 5;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.col-header {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-secondary);
  padding-bottom: 0.45rem;
  margin-bottom: 0.2rem;
  border-bottom: 1px solid var(--border-dim);
  display: flex;
  justify-content: space-between;
}

.stream-item {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: 4px;
  padding: 0.62rem 0.85rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  cursor: pointer;
  backdrop-filter: blur(12px);
  transition: all 0.2s ease;
}

.stream-item:hover, .stream-item.active {
  transform: translateX(4px);
}

.stream-item.swallowed {
  border-left: 3px solid var(--crimson-drop);
}

.stream-item.swallowed:hover, .stream-item.swallowed.active {
  border-color: var(--crimson-drop);
  background: rgba(244, 63, 94, 0.12);
}

.stream-item.passed {
  border-left: 3px solid var(--gold-core);
}

.stream-item.passed:hover, .stream-item.passed.active {
  border-color: var(--gold-core);
  background: rgba(255, 174, 66, 0.12);
}

.stream-name {
  color: var(--text-primary);
  font-weight: 500;
}

.stream-fate {
  font-size: 0.64rem;
  letter-spacing: 0.06em;
  padding: 0.15rem 0.42rem;
  border-radius: 2px;
}

.stream-fate.fate-swallowed {
  color: #fda4af;
  background: rgba(244, 63, 94, 0.16);
}

.stream-fate.fate-passed {
  color: var(--gold-bright);
  background: rgba(255, 174, 66, 0.16);
}

/* Center Singularity Caption */
.center-singularity-zone {
  position: relative;
  z-index: 4;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: center;
  padding-bottom: 0.5rem;
  pointer-events: none;
}

.singularity-caption {
  background: rgba(6, 6, 10, 0.82);
  border: 1px solid var(--border-dim);
  padding: 0.42rem 0.9rem;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  text-align: center;
  backdrop-filter: blur(8px);
}

.singularity-caption strong {
  color: var(--gold-bright);
}

/* Right Column: What Claude Sees Inside Colima Container */
.output-card {
  background: var(--bg-card);
  border: 1px solid var(--border-dim);
  border-radius: 4px;
  padding: 0.72rem 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  backdrop-filter: blur(12px);
}

.output-card.verified {
  border-right: 3px solid var(--emerald-ok);
}

.output-card.blinded {
  border-right: 3px solid var(--crimson-drop);
  background: rgba(20, 8, 14, 0.78);
}

.output-label {
  font-size: 0.63rem;
  color: var(--text-secondary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.22rem;
  display: flex;
  justify-content: space-between;
}

.output-val {
  color: var(--text-primary);
  font-weight: 500;
}

.output-val.highlight-gold {
  color: var(--gold-bright);
}

.output-val.highlight-green {
  color: #34d399;
}

.output-val.highlight-red {
  color: #fda4af;
}

/* Hero Footer: Install Bar */
.hero-bottom-bar {
  position: relative;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  padding-top: 0.75rem;
  border-top: 1px solid var(--border-dim);
}

.install-pill {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  background: rgba(8, 8, 12, 0.9);
  border: 1px solid var(--border-gold);
  padding: 0.6rem 0.8rem 0.6rem 1.05rem;
  border-radius: 3px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: #f4f4f5;
}

.install-pill .prompt {
  color: var(--gold-core);
  user-select: none;
}

.install-pill .copy-btn {
  background: rgba(255, 174, 66, 0.15);
  border: 1px solid var(--border-gold);
  color: var(--gold-bright);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  padding: 0.28rem 0.6rem;
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.2s;
}

.install-pill .copy-btn:hover {
  background: var(--gold-core);
  color: #000;
}

.legend-inline {
  display: flex;
  align-items: center;
  gap: 1.4rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
}

.legend-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  margin-right: 0.4rem;
}

.legend-dot.red {
  background: var(--crimson-drop);
  box-shadow: 0 0 8px var(--crimson-drop);
}

.legend-dot.gold {
  background: var(--gold-core);
  box-shadow: 0 0 8px var(--gold-core);
}

/* Below-the-fold Spacious Deck */
.content-deck {
  position: relative;
  z-index: 20;
  background: var(--bg-void);
}

.section {
  max-width: 1120px;
  margin: 0 auto;
  padding: 7.5rem 2.8rem;
}

.section-header {
  margin-bottom: 3rem;
}

.section-tag {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--gold-core);
  margin-bottom: 0.65rem;
  display: block;
}

.section-title {
  font-size: clamp(1.7rem, 2.5vw, 2.25rem);
  font-weight: 500;
  letter-spacing: -0.02em;
}

/* Interactive Terminal */
.terminal-shell {
  background: rgba(6, 6, 10, 0.95);
  border: 1px solid var(--border-dim);
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 0 25px 80px rgba(0, 0, 0, 0.9);
}

.terminal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1.25rem;
  background: rgba(12, 12, 18, 0.95);
  border-bottom: 1px solid var(--border-dim);
  flex-wrap: wrap;
  gap: 0.75rem;
}

.traffic-lights {
  display: flex;
  gap: 0.45rem;
}

.traffic-lights span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.16);
}

.terminal-tabs {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.term-tab {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 0.32rem 0.72rem;
  border-radius: 2px;
  cursor: pointer;
  transition: all 0.2s;
}

.term-tab:hover {
  color: var(--text-primary);
}

.term-tab.active {
  background: rgba(255, 174, 66, 0.14);
  border-color: var(--border-gold);
  color: var(--gold-bright);
}

.terminal-body {
  padding: 1.85rem;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.75;
  min-height: 260px;
  color: #f0f0f5;
  overflow-x: auto;
  white-space: pre-wrap;
}

.terminal-statusline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.5rem 1.25rem;
  background: rgba(10, 8, 14, 0.98);
  border-top: 1px solid var(--border-dim);
  font-family: var(--font-mono);
  font-size: 0.71rem;
}

.statusline-left {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.ansi-badge {
  background: #a21caf;
  color: #fff;
  font-weight: 700;
  padding: 0.1rem 0.45rem;
  border-radius: 2px;
  letter-spacing: 0.06em;
}

.ansi-magenta { color: #f0abfc; }
.ansi-cyan { color: var(--gold-bright); }
.ansi-dim { color: #8e8e9e; }
.ansi-green { color: #6ee7b7; }
.ansi-red { color: #fda4af; }
.ansi-yellow { color: #fcd34d; }

/* Monumental Benchmark Numbers */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 3rem;
  border-top: 1px solid var(--border-dim);
  padding-top: 3rem;
}

.stat-value {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(2.6rem, 3.8vw, 3.6rem);
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--gold-bright);
  margin-bottom: 0.65rem;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-primary);
  margin-bottom: 0.4rem;
}

.stat-sub {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Footer */
.footer {
  max-width: 1120px;
  margin: 0 auto;
  padding: 2.8rem 2.8rem 4rem;
  border-top: 1px solid var(--border-dim);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
}

.footer a {
  color: var(--text-secondary);
  text-decoration: none;
}

.footer a:hover {
  color: var(--gold-bright);
}

/* Blog / Essay Page */
.blog-shell {
  max-width: 780px;
  margin: 0 auto;
  padding: 6.8rem 2rem 5rem;
}

.blog-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gold-core);
  margin-bottom: 1.1rem;
}

.blog-title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(1.75rem, 3.2vw, 2.55rem);
  line-height: 1.25;
  letter-spacing: -0.025em;
  color: var(--text-primary);
  margin-bottom: 2.2rem;
}

.blog-article {
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.88;
  color: #ededf2;
  -webkit-font-smoothing: subpixel-antialiased;
}

.blog-article p {
  margin-bottom: 1.35rem;
}

.blog-article hr {
  border: 0;
  border-top: 1px solid var(--border-dim);
  margin: 2.8rem 0;
}

.blog-article h2 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.45rem;
  letter-spacing: -0.015em;
  color: var(--text-primary);
  margin: 2.6rem 0 1.1rem;
}

.blog-article h3 {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 1.12rem;
  color: var(--gold-bright);
  margin: 2rem 0 0.85rem;
}

.blog-article ul,
.blog-article ol {
  margin: 0 0 1.45rem 1.35rem;
}

.blog-article li {
  margin-bottom: 0.65rem;
}

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

.blog-article code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: rgba(255, 174, 66, 0.08);
  border: 1px solid rgba(255, 174, 66, 0.22);
  color: var(--gold-bright);
  padding: 0.12rem 0.4rem;
  border-radius: 3px;
}

.blog-article pre {
  background: rgba(8, 8, 12, 0.95);
  border: 1px solid var(--border-gold);
  border-radius: 4px;
  padding: 1rem 1.25rem;
  margin: 1.4rem 0;
  overflow-x: auto;
}

.blog-article pre code {
  background: transparent;
  border: 0;
  padding: 0;
  color: #f4f4f5;
  font-size: 0.85rem;
}

.blog-article blockquote {
  margin: 1.5rem 0;
  padding: 0.95rem 1.25rem;
  border-left: 2px solid var(--gold-core);
  background: rgba(255, 174, 66, 0.05);
  color: var(--text-primary);
}

.blog-article blockquote p:last-child {
  margin-bottom: 0;
}

.blog-article a {
  color: var(--gold-bright);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.blog-article a:hover {
  color: #fff;
}

.hud-btn.active-nav {
  border-color: var(--border-gold);
  color: var(--gold-bright);
  background: rgba(255, 174, 66, 0.12);
}

@media (max-width: 1024px) {
  .diagram-stage {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 2.2rem;
  }
}