/* ═══════════════════════════════════════════════════════════════════════════════════
   NEXUS CANVAS v2.0  —  Dynamic Knowledge Canvas Styles
   ═══════════════════════════════════════════════════════════════════════════════════
   Liquid-glass aesthetic with 3D depth, organic motion, and adaptive layouts.
   
   Design principles:
   1. Every surface is translucent glass with soft blur
   2. Depth conveyed through layered shadows (never flat)
   3. Accent glow on interactive elements
   4. Smooth spring-based animations
   5. Responsive: single-column on mobile, multi-column on desktop
   ═══════════════════════════════════════════════════════════════════════════════════ */

/* ── DESIGN TOKENS ── */
:root {
  --nx-glass-bg:         rgba(28, 28, 32, 0.55);
  --nx-glass-bg-hover:   rgba(38, 38, 44, 0.65);
  --nx-glass-border:     rgba(255,255,255, 0.08);
  --nx-glass-border-hi:  rgba(255,255,255, 0.14);
  --nx-blur:             20px;
  --nx-radius:           18px;
  --nx-radius-sm:        12px;
  --nx-radius-xs:        8px;

  --nx-accent:           #00f0ff;
  --nx-accent-dim:       rgba(0,240,255, 0.15);
  --nx-accent-glow:      rgba(0,240,255, 0.25);
  --nx-accent-secondary: #38bdf8;

  --nx-hero-gradient:    linear-gradient(135deg, rgba(0,240,255,0.12) 0%, rgba(56,189,248,0.06) 100%);

  --nx-shadow-sm:        0 2px 8px rgba(0,0,0,0.25);
  --nx-shadow-md:        0 4px 20px rgba(0,0,0,0.3), 0 0 0 1px var(--nx-glass-border);
  --nx-shadow-lg:        0 8px 40px rgba(0,0,0,0.35), 0 0 0 1px var(--nx-glass-border);
  --nx-shadow-glow:      0 0 30px rgba(0,240,255, 0.08);

  --nx-text:             #e8e8e8;
  --nx-text-secondary:   #b0b0b8;
  --nx-text-muted:       #808088;

  --nx-font-body:        'Poppins', -apple-system, sans-serif;
  --nx-font-mono:        'JetBrains Mono', 'Fira Code', monospace;
  --nx-font-display:     'Orbitron', 'Poppins', sans-serif;

  --nx-spring:           cubic-bezier(0.23, 1, 0.32, 1);
  --nx-spring-bouncy:    cubic-bezier(0.34, 1.56, 0.64, 1);
}


/* ═══════════════════════════════════════════════════
   CONVERSATIONAL REPLY
   ═══════════════════════════════════════════════════ */

.nx-reply {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 20px 24px;
  margin-bottom: 20px;
  background: var(--nx-glass-bg);
  backdrop-filter: blur(var(--nx-blur));
  -webkit-backdrop-filter: blur(var(--nx-blur));
  border: 1px solid var(--nx-glass-border);
  border-radius: var(--nx-radius);
  box-shadow: var(--nx-shadow-md);
  animation: nxFadeSlideUp 0.5s var(--nx-spring) both;
}

.nx-reply-icon {
  flex-shrink: 0;
  font-size: 18px;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--nx-accent-dim);
  border-radius: 50%;
  color: var(--nx-accent);
}

.nx-reply-text {
  font-family: var(--nx-font-body);
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--nx-text);
}

.nx-reply-text strong { color: #fff; font-weight: 600; }
.nx-reply-text code {
  background: rgba(255,255,255,0.06);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: var(--nx-font-mono);
  font-size: 13px;
  color: var(--nx-accent-secondary);
}


/* ═══════════════════════════════════════════════════
   CANVAS WRAPPER
   ═══════════════════════════════════════════════════ */

.nx-canvas {
  background: var(--nx-glass-bg);
  backdrop-filter: blur(var(--nx-blur));
  -webkit-backdrop-filter: blur(var(--nx-blur));
  border: 1px solid var(--nx-glass-border);
  border-radius: var(--nx-radius);
  box-shadow: var(--nx-shadow-lg), var(--nx-shadow-glow);
  padding: 28px;
  margin-bottom: 20px;
  position: relative;
  overflow: hidden;
  animation: nxFadeSlideUp 0.6s var(--nx-spring) both;
  animation-delay: 80ms;
}

/* Subtle inner glow line at top */
.nx-canvas::before {
  content: "";
  position: absolute;
  top: 0; left: 10%; right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--nx-accent-glow), transparent);
  pointer-events: none;
}


/* ═══════════════════════════════════════════════════
   CANVAS HEADER
   ═══════════════════════════════════════════════════ */

.nx-canvas-header {
  margin-bottom: 20px;
}

.nx-type-badge {
  display: inline-block;
  font-family: var(--nx-font-display);
  font-size: 10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--nx-accent);
  background: var(--nx-accent-dim);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 12px;
}

.nx-canvas-title {
  font-family: var(--nx-font-body);
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin: 0 0 6px;
  line-height: 1.3;
}

.nx-canvas-subtitle {
  font-size: 13.5px;
  color: var(--nx-text-secondary);
  margin: 0;
  line-height: 1.5;
}

.nx-canvas-description {
  font-family: var(--nx-font-body);
  font-size: 14px;
  line-height: 1.7;
  color: var(--nx-text-secondary);
  margin-bottom: 20px;
}

.nx-canvas-description strong { color: var(--nx-text); }


/* ═══════════════════════════════════════════════════
   HERO SECTION  (calculations, conversions, time)
   ═══════════════════════════════════════════════════ */

.nx-hero {
  background: var(--nx-hero-gradient);
  border: 1px solid var(--nx-glass-border-hi);
  border-radius: var(--nx-radius-sm);
  padding: 24px 28px;
  margin-bottom: 20px;
  text-align: center;
  position: relative;
}

.nx-hero-value {
  font-family: var(--nx-font-display);
  font-size: 38px;
  font-weight: 700;
  color: #fff;
  text-shadow: 0 0 40px var(--nx-accent-glow);
  line-height: 1.2;
}

.nx-hero-unit {
  font-size: 18px;
  font-weight: 400;
  color: var(--nx-accent);
  margin-left: 8px;
  vertical-align: baseline;
}

/* Type-specific hero accent colors */
.nx-hero--calculation { --nx-accent: #a78bfa; --nx-accent-glow: rgba(167,139,250,0.25); }
.nx-hero--conversion  { --nx-accent: #34d399; --nx-accent-glow: rgba(52,211,153,0.25); }
.nx-hero--time        { --nx-accent: #fbbf24; --nx-accent-glow: rgba(251,191,36,0.25); }
.nx-hero--translation { --nx-accent: #f472b6; --nx-accent-glow: rgba(244,114,182,0.25); }


/* ═══════════════════════════════════════════════════
   CARD BASE
   ═══════════════════════════════════════════════════ */

.nx-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--nx-glass-border);
  border-radius: var(--nx-radius-sm);
  padding: 16px 18px;
  transition: all 0.3s var(--nx-spring);
  opacity: 0;
  transform: translateY(12px);
}

.nx-card-enter {
  animation: nxCardEnter 0.5s var(--nx-spring) both;
}

.nx-card:hover {
  background: var(--nx-glass-bg-hover);
  border-color: var(--nx-glass-border-hi);
  box-shadow: var(--nx-shadow-sm);
  transform: translateY(-1px);
}

.nx-card[data-expandable] { cursor: pointer; }

.nx-card--expanded .nx-card-detail {
  max-height: 300px;
  opacity: 1;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--nx-glass-border);
}

.nx-card-detail {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: all 0.35s var(--nx-spring);
  font-size: 13px;
  line-height: 1.6;
  color: var(--nx-text-secondary);
}

.nx-card-link {
  display: inline-block;
  margin-top: 8px;
  font-size: 12px;
  color: var(--nx-accent);
  text-decoration: none;
  opacity: 0.7;
  transition: opacity 0.2s;
}
.nx-card-link:hover { opacity: 1; }


/* ═══════════════════════════════════════════════════
   FACT GRID  (entity, knowledge, default)
   ═══════════════════════════════════════════════════ */

.nx-fact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

.nx-fact-label {
  font-size: 11px;
  font-family: var(--nx-font-display);
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--nx-accent);
  margin-bottom: 6px;
}

.nx-fact-value {
  font-size: 15px;
  font-weight: 500;
  color: var(--nx-text);
  line-height: 1.4;
}


/* ═══════════════════════════════════════════════════
   DEFINITION CARDS
   ═══════════════════════════════════════════════════ */

.nx-def-card {
  margin-bottom: 8px;
}

.nx-def-pos {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: var(--nx-accent);
  background: var(--nx-accent-dim);
  padding: 2px 10px;
  border-radius: 12px;
  margin-bottom: 8px;
  font-style: italic;
}

.nx-def-text {
  font-size: 14.5px;
  line-height: 1.65;
  color: var(--nx-text);
}

.nx-def-example {
  font-size: 13px;
  color: var(--nx-text-muted);
  font-style: italic;
  margin-top: 6px;
  padding-left: 14px;
  border-left: 2px solid var(--nx-glass-border-hi);
}


/* ═══════════════════════════════════════════════════
   COMPARISON GRID
   ═══════════════════════════════════════════════════ */

.nx-compare-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 14px;
}

.nx-compare-label {
  font-family: var(--nx-font-display);
  font-size: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--nx-accent);
  margin-bottom: 10px;
}

.nx-compare-value {
  font-size: 14px;
  color: var(--nx-text);
  line-height: 1.6;
}


/* ═══════════════════════════════════════════════════
   TIMELINE
   ═══════════════════════════════════════════════════ */

.nx-timeline {
  position: relative;
  padding-left: 28px;
}

.nx-timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--nx-accent), transparent);
  border-radius: 1px;
}

.nx-timeline-item {
  position: relative;
  margin-bottom: 14px;
  padding: 14px 18px;
}

.nx-timeline-dot {
  position: absolute;
  left: -24px;
  top: 18px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--nx-accent);
  box-shadow: 0 0 10px var(--nx-accent-glow);
}

.nx-timeline-date {
  font-size: 12px;
  font-weight: 600;
  color: var(--nx-accent);
  margin-bottom: 4px;
}

.nx-timeline-text {
  font-size: 14px;
  color: var(--nx-text);
  line-height: 1.6;
}


/* ═══════════════════════════════════════════════════
   RANKED LIST
   ═══════════════════════════════════════════════════ */

.nx-ranked-list {
  list-style: none;
  counter-reset: rank;
  padding: 0;
  margin: 0;
}

.nx-ranked-item {
  counter-increment: rank;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 14px 16px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.nx-ranked-item::before {
  content: counter(rank);
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--nx-accent-dim);
  color: var(--nx-accent);
  border-radius: 50%;
  font-family: var(--nx-font-display);
  font-size: 12px;
  font-weight: 700;
}

.nx-ranked-label {
  font-size: 15px;
  font-weight: 500;
  color: var(--nx-text);
}

.nx-ranked-value {
  font-size: 13px;
  color: var(--nx-text-secondary);
  margin-left: auto;
}


/* ═══════════════════════════════════════════════════
   HOW-TO STEPS
   ═══════════════════════════════════════════════════ */

.nx-steps { display: flex; flex-direction: column; gap: 10px; }

.nx-step-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.nx-step-num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--nx-accent-dim);
  color: var(--nx-accent);
  border-radius: 50%;
  font-family: var(--nx-font-display);
  font-size: 13px;
  font-weight: 700;
}

.nx-step-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--nx-text);
  margin-bottom: 4px;
}

.nx-step-text {
  font-size: 13.5px;
  color: var(--nx-text-secondary);
  line-height: 1.6;
}


/* ═══════════════════════════════════════════════════
   CODE BLOCKS
   ═══════════════════════════════════════════════════ */

.nx-code-card {
  position: relative;
  padding: 0;
  overflow: hidden;
}

.nx-code-label {
  font-family: var(--nx-font-display);
  font-size: 10px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--nx-accent);
  padding: 10px 16px 6px;
}

.nx-code-pre {
  margin: 0;
  padding: 14px 16px 18px;
  overflow-x: auto;
}

.nx-code-block {
  font-family: var(--nx-font-mono);
  font-size: 13px;
  line-height: 1.65;
  color: var(--nx-text);
  white-space: pre;
}

.nx-code-copy {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--nx-glass-border);
  color: var(--nx-text-muted);
  font-size: 11px;
  padding: 4px 10px;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
}
.nx-code-copy:hover {
  background: var(--nx-accent-dim);
  color: var(--nx-accent);
}


/* ═══════════════════════════════════════════════════
   ACADEMIC PAPER CARDS
   ═══════════════════════════════════════════════════ */

.nx-paper-card {
  margin-bottom: 8px;
}

.nx-paper-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--nx-text);
  margin-bottom: 6px;
  line-height: 1.4;
}

.nx-paper-link {
  color: var(--nx-accent-secondary);
  text-decoration: none;
  transition: color 0.2s;
}
.nx-paper-link:hover { color: var(--nx-accent); }

.nx-paper-abstract {
  font-size: 13px;
  color: var(--nx-text-secondary);
  line-height: 1.55;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.nx-paper-meta {
  font-size: 11.5px;
  color: var(--nx-text-muted);
  font-family: var(--nx-font-mono);
}


/* ═══════════════════════════════════════════════════
   SOURCES BAR
   ═══════════════════════════════════════════════════ */

.nx-sources {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 0;
  margin-bottom: 16px;
  flex-wrap: wrap;
  animation: nxFadeSlideUp 0.5s var(--nx-spring) both;
  animation-delay: 200ms;
}

.nx-sources-label {
  font-family: var(--nx-font-display);
  font-size: 10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--nx-text-muted);
  flex-shrink: 0;
}

.nx-sources-list {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.nx-source-chip {
  display: inline-flex;
  align-items: center;
  padding: 5px 12px;
  background: var(--nx-glass-bg);
  backdrop-filter: blur(12px);
  border: 1px solid var(--nx-glass-border);
  border-radius: 20px;
  font-size: 12px;
  color: var(--nx-text-secondary);
  text-decoration: none;
  transition: all 0.25s var(--nx-spring);
  max-width: 200px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.nx-source-chip:hover {
  background: var(--nx-accent-dim);
  border-color: var(--nx-accent);
  color: var(--nx-accent);
  transform: translateY(-1px);
}


/* ═══════════════════════════════════════════════════
   RELATED SEARCHES
   ═══════════════════════════════════════════════════ */

.nx-related {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  flex-wrap: wrap;
  animation: nxFadeSlideUp 0.5s var(--nx-spring) both;
  animation-delay: 260ms;
}

.nx-related-label {
  font-family: var(--nx-font-display);
  font-size: 10px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--nx-text-muted);
  flex-shrink: 0;
}

.nx-related-pills {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.nx-related-pill {
  padding: 6px 14px;
  background: none;
  border: 1px solid var(--nx-glass-border);
  border-radius: 20px;
  font-family: var(--nx-font-body);
  font-size: 13px;
  color: var(--nx-text-secondary);
  cursor: pointer;
  transition: all 0.25s var(--nx-spring);
}

.nx-related-pill:hover {
  background: var(--nx-accent-dim);
  border-color: var(--nx-accent);
  color: var(--nx-accent);
  transform: translateY(-1px);
}


/* ═══════════════════════════════════════════════════
   ANIMATIONS
   ═══════════════════════════════════════════════════ */

@keyframes nxFadeSlideUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes nxCardEnter {
  from {
    opacity: 0;
    transform: translateY(14px) scale(0.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}


/* ═══════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════ */

@media (max-width: 768px) {
  .nx-canvas { padding: 18px; }
  .nx-canvas-title { font-size: 18px; }
  .nx-hero-value { font-size: 28px; }
  .nx-fact-grid { grid-template-columns: 1fr; }
  .nx-compare-grid { grid-template-columns: 1fr; }
  .nx-reply { padding: 14px 16px; }
}

@media (max-width: 480px) {
  .nx-canvas { padding: 14px; border-radius: 14px; }
  .nx-hero { padding: 16px; }
  .nx-hero-value { font-size: 24px; }
}