/* ═══════════════════════════════════════════════════════════════════════════
   WEB3 ENGINEERING PAGE STYLES
   ═══════════════════════════════════════════════════════════════════════════ */

/* ─── Network Canvas ─────────────────────────────────────────────────────── */
#networkCanvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* ─── Hero ────────────────────────────────────────────────────────────────── */
.w3-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.w3-hero__gradient {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 20% 40%, rgba(139, 92, 246, 0.08), transparent),
    radial-gradient(ellipse 60% 50% at 80% 60%, rgba(59, 130, 246, 0.06), transparent);
  pointer-events: none;
}

.w3-hero__content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.w3-hero__title {
  font-size: clamp(3rem, 7vw, 5rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, #8b5cf6 0%, #3b82f6 40%, #06b6d4 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.w3-hero__subtitle {
  font-size: clamp(1rem, 2.5vw, 1.35rem);
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 1rem;
  font-family: var(--font-mono);
}

.w3-hero__desc {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2rem;
  max-width: 600px;
}

.w3-hero__actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 0;
}

.w3-hero__stats {
  display: flex;
  align-items: center;
  gap: 2rem;
  margin-top: 2.5rem;
  padding: 1.25rem 1.75rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
}

.w3-hero__stat { text-align: center; }

.w3-hero__stat-number {
  font-size: 2rem;
  font-weight: 900;
  font-family: var(--font-mono);
  background: linear-gradient(135deg, #8b5cf6, #3b82f6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.w3-hero__stat-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.2rem;
}

.w3-hero__stat-divider {
  width: 1px;
  height: 40px;
  background: var(--glass-border);
}

/* ─── Section Desc ───────────────────────────────────────────────────────── */
.w3-section-desc {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 2rem;
  max-width: 700px;
}

/* ─── AEDSC Intro ────────────────────────────────────────────────────────── */
.w3-aedsc-intro {
  margin-bottom: 2.5rem;
}

.w3-aedsc-intro p {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 1.25rem;
}

.w3-aedsc-intro strong {
  color: var(--text-primary);
}

.w3-aedsc-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.w3-badge {
  padding: 0.3rem 0.75rem;
  border-radius: 50px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
}

.w3-badge--purple {
  background: rgba(139, 92, 246, 0.1);
  border: 1px solid rgba(139, 92, 246, 0.2);
  color: var(--purple-light);
}

.w3-badge--blue {
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid rgba(59, 130, 246, 0.2);
  color: var(--blue);
}

.w3-badge--green {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.2);
  color: var(--green);
}

.w3-badge--gold {
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.2);
  color: var(--gold);
}

/* ─── Architecture Diagram ───────────────────────────────────────────────── */
.w3-arch {
  position: relative;
  margin-bottom: 2rem;
}

.w3-arch__flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: 2.5rem 1.5rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow-x: auto;
}

.w3-arch__node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 1.25rem 1rem;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  position: relative;
  min-width: 100px;
  text-align: center;
}

.w3-arch__node:hover {
  background: rgba(255, 255, 255, 0.04);
  transform: translateY(-4px);
}

.w3-arch__node--highlight {
  background: rgba(139, 92, 246, 0.06);
  border: 1px solid rgba(139, 92, 246, 0.15);
}

.w3-arch__node--highlight:hover {
  background: rgba(139, 92, 246, 0.1);
  border-color: rgba(139, 92, 246, 0.3);
  box-shadow: 0 0 25px rgba(139, 92, 246, 0.15);
}

.w3-arch__node-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  transition: all var(--transition-normal);
}

.w3-arch__node:hover .w3-arch__node-icon {
  transform: scale(1.08);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.w3-arch__node-label {
  font-weight: 700;
  font-size: 0.85rem;
}

.w3-arch__node-tech {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-muted);
}

.w3-arch__connector {
  display: flex;
  align-items: center;
  gap: 0;
  flex-shrink: 0;
  padding: 0 0.25rem;
}

.w3-arch__line {
  width: 24px;
  height: 1px;
  background: var(--glass-border);
}

.w3-arch__arrow {
  color: var(--purple-light);
  opacity: 0.5;
}

/* Popover */
.w3-arch__popover {
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%) translateY(100%);
  width: 380px;
  padding: 1rem 1.25rem;
  background: var(--bg-secondary);
  border: 1px solid rgba(139, 92, 246, 0.2);
  border-radius: var(--radius-md);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 20;
  pointer-events: none;
}

.w3-arch__popover.visible {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(calc(100% + 5px));
}

/* ─── AEDSC Links ────────────────────────────────────────────────────────── */
.w3-aedsc-links {
  text-align: center;
}

/* ─── Deep Dive Toggle Cards ─────────────────────────────────────────────── */
.w3-deepdive-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.w3-deepdive-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.w3-deepdive-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  background: rgba(255, 255, 255, 0.02);
  border-bottom: 1px solid var(--glass-border);
}

.w3-deepdive-card__header h3 {
  font-size: 1.05rem;
  font-weight: 700;
}

.w3-deepdive-toggle {
  display: flex;
  background: var(--bg-primary);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  overflow: hidden;
}

.w3-deepdive-toggle__btn {
  padding: 0.4rem 1rem;
  font-size: 0.72rem;
  font-weight: 600;
  font-family: var(--font-mono);
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.w3-deepdive-toggle__btn--active[data-mode="vuln"] {
  background: rgba(239, 68, 68, 0.15);
  color: var(--red);
}

.w3-deepdive-toggle__btn--active[data-mode="secure"] {
  background: rgba(16, 185, 129, 0.15);
  color: var(--green);
}

.w3-deepdive-card__body {
  padding: 1.5rem;
  position: relative;
}

.w3-deepdive-code {
  display: none;
}

.w3-deepdive-code.active {
  display: block;
}

.w3-deepdive-code .code-block {
  margin: 0;
}

.w3-deepdive-card__explain {
  padding: 0 1.5rem 1.5rem;
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
}

.w3-deepdive-card__explain code {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  background: rgba(139, 92, 246, 0.1);
  padding: 0.1rem 0.4rem;
  border-radius: 4px;
  color: var(--purple-light);
}

.w3-deepdive-card__explain strong {
  color: var(--text-primary);
}

.w3-deepdive-cta {
  text-align: center;
  margin-top: 2rem;
}

/* Vuln/Fix labels reused from security-lab */
.vuln-label, .fix-label {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.15rem 0.5rem;
  border-radius: 50px;
}

.vuln-label {
  background: rgba(239, 68, 68, 0.15);
  color: var(--red);
}

.fix-label {
  background: rgba(16, 185, 129, 0.15);
  color: var(--green);
}

.vuln-code { border-color: rgba(239, 68, 68, 0.2) !important; }
.fix-code { border-color: rgba(16, 185, 129, 0.2) !important; }

/* ─── Tokenomics ─────────────────────────────────────────────────────────── */
.w3-tokenomics {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 3rem;
  align-items: center;
}

.w3-tokenomics__chart {
  display: flex;
  justify-content: center;
}

.w3-tokenomics__ring {
  position: relative;
  width: 250px;
  height: 250px;
}

.w3-tokenomics__svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}

.w3-tokenomics__segment {
  transition: all 0.4s ease;
  cursor: pointer;
}

.w3-tokenomics__segment:hover {
  stroke-width: 25;
  filter: drop-shadow(0 0 8px currentColor);
}

.w3-tokenomics__center {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
}

.w3-tokenomics__center-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.w3-tokenomics__center-value {
  display: block;
  font-size: 1.5rem;
  font-weight: 900;
  font-family: var(--font-mono);
  background: linear-gradient(135deg, #8b5cf6, #3b82f6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-top: 0.2rem;
}

.w3-tokenomics__legend {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.w3-tokenomics__legend-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  cursor: default;
}

.w3-tokenomics__legend-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--glass-border-hover);
  transform: translateX(4px);
}

.w3-tokenomics__legend-color {
  width: 14px;
  height: 14px;
  border-radius: 4px;
  flex-shrink: 0;
  margin-top: 0.15rem;
}

.w3-tokenomics__legend-item strong {
  display: block;
  font-size: 0.9rem;
  margin-bottom: 0.2rem;
}

.w3-tokenomics__legend-item p {
  font-size: 0.78rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ─── Stack Pyramid ──────────────────────────────────────────────────────── */
.w3-pyramid {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  max-width: 700px;
  margin: 0 auto 2.5rem;
}

.w3-pyramid__layer {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.w3-pyramid__layer-label {
  width: 140px;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-align: right;
  flex-shrink: 0;
}

.w3-pyramid__layer-bar {
  flex: 1;
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
  transition: all var(--transition-normal);
}

.w3-pyramid__layer-bar:hover {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--glass-border-hover);
  transform: translateX(4px);
}

.w3-pyramid__layer-bar span {
  padding: 0.2rem 0.6rem;
  border-radius: 50px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
}

/* Layer colors */
.w3-pyramid__layer--1 .w3-pyramid__layer-bar {
  background: rgba(245, 158, 11, 0.04);
}
.w3-pyramid__layer--1 .w3-pyramid__layer-bar span {
  background: rgba(245, 158, 11, 0.1);
  color: var(--gold);
}

.w3-pyramid__layer--2 .w3-pyramid__layer-bar {
  background: rgba(59, 130, 246, 0.04);
}
.w3-pyramid__layer--2 .w3-pyramid__layer-bar span {
  background: rgba(59, 130, 246, 0.1);
  color: var(--blue);
}

.w3-pyramid__layer--3 .w3-pyramid__layer-bar {
  background: rgba(16, 185, 129, 0.04);
}
.w3-pyramid__layer--3 .w3-pyramid__layer-bar span {
  background: rgba(16, 185, 129, 0.1);
  color: var(--green);
}

.w3-pyramid__layer--4 .w3-pyramid__layer-bar {
  background: rgba(139, 92, 246, 0.04);
}
.w3-pyramid__layer--4 .w3-pyramid__layer-bar span {
  background: rgba(139, 92, 246, 0.1);
  color: var(--purple-light);
}

.w3-pyramid__layer--5 .w3-pyramid__layer-bar {
  background: rgba(6, 182, 212, 0.04);
}
.w3-pyramid__layer--5 .w3-pyramid__layer-bar span {
  background: rgba(6, 182, 212, 0.1);
  color: var(--cyan);
}

.w3-pyramid__layer--6 .w3-pyramid__layer-bar {
  background: rgba(236, 72, 153, 0.04);
}
.w3-pyramid__layer--6 .w3-pyramid__layer-bar span {
  background: rgba(236, 72, 153, 0.1);
  color: var(--pink);
}

/* ─── Concepts ───────────────────────────────────────────────────────────── */
.w3-concepts {
  text-align: center;
}

.w3-concepts__title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.w3-concepts__grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.5rem;
}

.w3-concept-tag {
  padding: 0.4rem 0.85rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 50px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition-normal);
}

.w3-concept-tag:hover {
  background: rgba(255, 255, 255, 0.06);
  border-color: var(--glass-border-hover);
  color: var(--text-primary);
  transform: translateY(-2px);
}

/* ─── Project Cards ──────────────────────────────────────────────────────── */
.w3-projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.w3-project-card {
  display: flex;
  gap: 1.25rem;
  padding: 1.5rem;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.w3-project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
}

.w3-project-card:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--glass-border-hover);
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.w3-project-card__icon {
  width: 50px;
  height: 50px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: #fff;
  flex-shrink: 0;
}

.w3-project-card__body h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.1rem;
}

.w3-project-card__sub {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 0.5rem;
}

.w3-project-card__body p {
  font-size: 0.82rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 0.75rem;
}

.w3-project-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
  margin-bottom: 0.75rem;
}

.w3-project-card__tags span {
  padding: 0.15rem 0.5rem;
  background: rgba(139, 92, 246, 0.08);
  border-radius: 50px;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--purple-light);
}

.w3-project-card__link {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--purple);
  font-family: var(--font-mono);
  transition: color 0.3s ease;
}

.w3-project-card__link:hover {
  color: var(--purple-light);
}

/* ─── Responsive ─────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  .w3-tokenomics {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .w3-tokenomics__chart {
    justify-content: center;
  }

  .w3-arch__flow {
    padding: 1.5rem 1rem;
    gap: 0;
  }

  .w3-deepdive-card__header {
    flex-direction: column;
    gap: 0.75rem;
    align-items: flex-start;
  }
}

@media (max-width: 768px) {
  .w3-hero {
    min-height: auto;
    padding: 7rem 0 3rem;
  }

  .w3-hero__stats {
    flex-direction: column;
    gap: 1rem;
    text-align: center;
  }

  .w3-hero__stat-divider {
    width: 40px;
    height: 1px;
  }

  .w3-arch__flow {
    flex-direction: column;
    gap: 0.5rem;
  }

  .w3-arch__connector {
    transform: rotate(90deg);
    padding: 0.25rem 0;
  }

  .w3-arch__popover {
    width: calc(100vw - 4rem);
    left: 0;
    transform: translateY(100%);
  }

  .w3-arch__popover.visible {
    transform: translateY(calc(100% + 5px));
  }

  .w3-pyramid__layer {
    flex-direction: column;
    gap: 0.25rem;
    align-items: stretch;
  }

  .w3-pyramid__layer-label {
    width: auto;
    text-align: left;
    font-size: 0.65rem;
  }

  .w3-projects-grid {
    grid-template-columns: 1fr;
  }

  .w3-project-card {
    flex-direction: column;
    gap: 0.75rem;
  }
}