/* Bio Links — Blockchain Chain Visual */

.bio-main {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1.5rem 3rem;
}

.page {
  width: 100%;
  max-width: 420px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

/* ── Perfil ── */
.profile { text-align: center; }

.logo {
  width: 88px;
  height: 88px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: var(--w3-glass);
  border: 1px solid var(--w3-glass-border);
  backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--w3-glow), var(--w3-glow-pink);
  position: relative;
}

.logo::after {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  background: var(--w3-gradient);
  z-index: -1;
  opacity: 0.4;
  filter: blur(8px);
}

.logo-icon {
  font-size: 2.25rem;
  font-weight: 700;
  font-family: var(--w3-font-display);
  background-image: var(--w3-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand {
  margin: 0 0 0.25rem;
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  color: var(--w3-muted);
  font-weight: 400;
  text-transform: uppercase;
}

.name {
  margin: 0 0 0.25rem;
  font-family: var(--w3-font-display);
  font-size: 1.75rem;
  font-weight: 600;
  background-image: var(--w3-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.tagline {
  margin: 0;
  font-size: 0.85rem;
  color: var(--w3-muted);
  font-weight: 300;
}

/* ══════════════════════════════════
   CHAIN LINKS (vertical blockchain)
   ══════════════════════════════════ */

.link-chain {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
}

/* Chain card (each link = a block) */
.chain-card {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.9rem 1.1rem;
  border: 1.5px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  color: var(--w3-text);
  text-decoration: none;
  position: relative;
  overflow: hidden;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  -webkit-tap-highlight-color: transparent;
}

.chain-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 16px;
  background: radial-gradient(ellipse at 0% 50%, var(--card-color), transparent 65%);
  opacity: 0;
  transition: opacity 0.35s;
}

.chain-card:hover {
  border-color: var(--card-color);
  transform: translateY(-2px) scale(1.01);
  box-shadow:
    0 6px 28px color-mix(in srgb, var(--card-color) 25%, transparent),
    0 0 0 1px color-mix(in srgb, var(--card-color) 15%, transparent);
}

.chain-card:hover::before {
  opacity: 0.1;
}

.chain-card:active {
  transform: translateY(0) scale(1);
}

/* Icon */
.chain-card-icon {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: color-mix(in srgb, var(--card-color) 10%, transparent);
  border: 1px solid color-mix(in srgb, var(--card-color) 20%, transparent);
  padding: 9px;
  transition: all 0.35s;
  position: relative;
  z-index: 1;
}

.chain-card-icon svg {
  width: 100%;
  height: 100%;
  color: var(--card-color);
  fill: var(--card-color);
}

.chain-card-icon svg[stroke="currentColor"] {
  fill: none;
  stroke: var(--card-color);
}

.chain-card:hover .chain-card-icon {
  background: color-mix(in srgb, var(--card-color) 18%, transparent);
  border-color: color-mix(in srgb, var(--card-color) 35%, transparent);
  box-shadow: 0 0 14px color-mix(in srgb, var(--card-color) 25%, transparent);
}

/* Body */
.chain-card-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  position: relative;
  z-index: 1;
}

.chain-card-name {
  font-size: 0.95rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.chain-card-hash {
  font-size: 0.6rem;
  font-family: 'Courier New', monospace;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--card-color);
  opacity: 0.6;
}

/* Arrow */
.chain-card-arrow {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--w3-muted);
  opacity: 0;
  transform: translateX(-4px);
  transition: all 0.3s;
  position: relative;
  z-index: 1;
}

.chain-card-arrow svg {
  width: 100%;
  height: 100%;
}

.chain-card:hover .chain-card-arrow {
  opacity: 1;
  transform: translateX(0);
  color: var(--card-color);
}

/* ── Vertical chain connectors ── */
.chain-connector {
  width: 3px;
  height: 22px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.06);
  position: relative;
  overflow: hidden;
  flex-shrink: 0;
}

.chain-connector-pulse {
  position: absolute;
  left: 0;
  top: -100%;
  width: 100%;
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(180deg, transparent, var(--w3-purple), transparent);
  animation: connectorFlow 2.5s ease-in-out infinite;
}

@keyframes connectorFlow {
  0% { top: -100%; opacity: 0; }
  40% { opacity: 1; }
  100% { top: 100%; opacity: 0; }
}

/* Staggered animation delays per connector */
.chain-connector:nth-child(4) .chain-connector-pulse { animation-delay: 0.4s; }
.chain-connector:nth-child(6) .chain-connector-pulse { animation-delay: 0.8s; }
.chain-connector:nth-child(8) .chain-connector-pulse { animation-delay: 1.2s; }

/* Staggered card entrance */
.chain-card {
  animation: cardSlideIn 0.5s cubic-bezier(0.4, 0, 0.2, 1) backwards;
}

.chain-card:nth-child(1) { animation-delay: 0s; }
.chain-card:nth-child(3) { animation-delay: 0.08s; }
.chain-card:nth-child(5) { animation-delay: 0.16s; }
.chain-card:nth-child(7) { animation-delay: 0.24s; }
.chain-card:nth-child(9) { animation-delay: 0.32s; }

@keyframes cardSlideIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ── Responsive ── */
@media (max-width: 480px) {
  .bio-main {
    padding: 1.5rem 1rem 2rem;
  }

  .page {
    gap: 1.5rem;
  }

  .chain-card {
    padding: 0.8rem 1rem;
  }

  .chain-card-icon {
    width: 36px;
    height: 36px;
    padding: 8px;
  }

  .chain-connector {
    height: 16px;
  }
}