/* About Me — Blockchain Visual Tabs */

.about-main {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem 1.5rem 3rem;
  max-width: 760px;
  margin: 0 auto;
  width: 100%;
}

/* ── Hero ── */
.about-hero {
  width: 100%;
  text-align: center;
  padding: 2rem 2rem 1.75rem;
  border-radius: 24px;
}

.about-logo {
  width: 56px;
  height: 56px;
  margin: 0 auto 0.75rem;
  border-radius: 14px;
  background: var(--w3-glass);
  border: 1px solid var(--w3-glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--w3-font-display);
  font-size: 1.75rem;
  font-weight: 600;
}

.about-name {
  margin: 0 0 0.4rem;
  font-family: var(--w3-font-display);
  font-size: clamp(1.6rem, 5vw, 2.2rem);
  font-weight: 600;
  letter-spacing: -0.02em;
}

.about-roles {
  margin: 0;
  font-size: 0.85rem;
  color: var(--w3-muted);
  font-weight: 400;
  letter-spacing: 0.04em;
}

/* ══════════════════════════════════
   CHAIN NAVIGATION
   ══════════════════════════════════ */

.chain-wrapper {
  width: 100%;
  overflow-x: auto;
  padding: 0.75rem 0;
  scrollbar-width: thin;
  scrollbar-color: rgba(192, 132, 252, 0.3) transparent;
  -webkit-overflow-scrolling: touch;
}

.chain-wrapper::-webkit-scrollbar { height: 4px; }
.chain-wrapper::-webkit-scrollbar-thumb {
  background: rgba(192, 132, 252, 0.3);
  border-radius: 4px;
}

.chain-track {
  display: flex;
  align-items: center;
  gap: 0;
  min-width: max-content;
  padding: 0.5rem 0.25rem;
}

/* Individual block */
.chain-block {
  flex-shrink: 0;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  width: 82px;
  padding: 0.75rem 0.5rem 0.6rem;
  border: 1.5px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  cursor: pointer;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  color: var(--w3-muted);
  font-family: var(--w3-font);
  overflow: hidden;
}

.chain-block::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 16px;
  background: radial-gradient(circle at 50% 0%, var(--block-color), transparent 70%);
  opacity: 0;
  transition: opacity 0.35s;
}

.chain-block:hover {
  border-color: var(--block-color);
  transform: translateY(-2px);
}

.chain-block:hover::before {
  opacity: 0.08;
}

/* Active block */
.chain-block.active {
  border-color: var(--block-color);
  color: var(--w3-text);
  transform: translateY(-3px);
  box-shadow:
    0 4px 24px color-mix(in srgb, var(--block-color) 30%, transparent),
    0 0 0 1px color-mix(in srgb, var(--block-color) 20%, transparent);
}

.chain-block.active::before {
  opacity: 0.15;
}

.chain-block.active::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: 16px;
  border: 1.5px solid var(--block-color);
  animation: blockPulse 2s ease-in-out infinite;
}

@keyframes blockPulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* Block icon */
.block-icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.06);
  padding: 5px;
  transition: all 0.35s;
}

.block-icon svg {
  width: 100%;
  height: 100%;
  stroke: currentColor;
}

.chain-block.active .block-icon {
  background: color-mix(in srgb, var(--block-color) 15%, transparent);
  border-color: color-mix(in srgb, var(--block-color) 30%, transparent);
  color: var(--block-color);
}

.chain-block:hover .block-icon {
  color: var(--block-color);
}

/* Block label */
.block-label {
  font-size: 0.65rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  white-space: nowrap;
  position: relative;
  z-index: 1;
}

.chain-block.active .block-label {
  color: var(--w3-text);
}

/* Block ID badge */
.block-id {
  font-size: 0.55rem;
  font-family: 'Courier New', monospace;
  font-weight: 700;
  letter-spacing: 0.08em;
  opacity: 0.4;
  position: relative;
  z-index: 1;
}

.chain-block.active .block-id {
  color: var(--block-color);
  opacity: 0.8;
}

/* ── Chain links (connectors) ── */
.chain-link {
  flex-shrink: 0;
  width: 24px;
  height: 3px;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.06);
  position: relative;
  overflow: hidden;
}

.chain-link-pulse {
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  border-radius: 3px;
  background: linear-gradient(90deg, transparent, var(--w3-purple), transparent);
  animation: linkFlow 3s ease-in-out infinite;
}

@keyframes linkFlow {
  0% { left: -100%; opacity: 0; }
  40% { opacity: 1; }
  100% { left: 100%; opacity: 0; }
}

.chain-link.confirmed {
  background: linear-gradient(90deg,
    color-mix(in srgb, var(--w3-purple) 40%, transparent),
    color-mix(in srgb, var(--w3-pink) 40%, transparent)
  );
}

.chain-link.confirmed .chain-link-pulse {
  background: linear-gradient(90deg, transparent, var(--w3-teal), transparent);
}

/* ══════════════════════════════════
   CONTENT PANELS
   ══════════════════════════════════ */

.chain-content {
  width: 100%;
}

.block-panel {
  display: none;
  padding: 2rem;
  border-radius: 20px;
  animation: panelIn 0.45s cubic-bezier(0.4, 0, 0.2, 1);
}

.block-panel.active {
  display: block;
}

@keyframes panelIn {
  from { opacity: 0; transform: translateY(12px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

/* Panel title with dot */
.panel-title {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin: 0 0 1.25rem;
  font-size: 0.75rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--w3-muted);
  font-weight: 600;
  font-family: var(--w3-font);
}

.panel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--dot-color);
  box-shadow: 0 0 8px var(--dot-color);
  flex-shrink: 0;
}

.block-sub {
  margin: 1.5rem 0 0.6rem;
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--w3-purple);
  font-weight: 600;
  font-family: var(--w3-font);
}

.block-sub:first-of-type { margin-top: 0.5rem; }

/* Text */
.block-panel p {
  margin: 0 0 0.85rem;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--w3-text);
  font-weight: 300;
}

.block-panel p:last-child { margin-bottom: 0; }

.block-panel strong {
  font-weight: 600;
  color: var(--w3-text);
}

.about-list {
  margin: 0 0 1rem;
  padding-left: 1.25rem;
  color: var(--w3-text);
  font-size: 0.95rem;
  line-height: 1.8;
  font-weight: 300;
}

.about-list li { margin-bottom: 0.2rem; }
.about-list li::marker { color: var(--w3-purple); }

.about-list a {
  color: var(--w3-purple);
  text-decoration: none;
  transition: color 0.2s;
}

.about-list a:hover { color: var(--w3-teal); }

/* Accent block */
.block-accent {
  padding: 1rem 1.25rem;
  margin: 1rem 0;
  border-left: 3px solid var(--w3-purple);
  border-radius: 0 12px 12px 0;
  background: rgba(192, 132, 252, 0.06);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--w3-text);
  line-height: 1.6;
}

.block-small {
  font-size: 0.85rem !important;
  color: var(--w3-muted) !important;
  font-style: italic;
}

/* Tags */
.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag {
  padding: 0.45rem 1rem;
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--w3-text);
  background: rgba(192, 132, 252, 0.1);
  border: 1px solid rgba(192, 132, 252, 0.2);
  transition: all 0.3s;
}

.tag:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(192, 132, 252, 0.15);
}

.tag:nth-child(even) {
  background: rgba(244, 114, 182, 0.08);
  border-color: rgba(244, 114, 182, 0.2);
}

.tag:nth-child(even):hover {
  box-shadow: 0 4px 12px rgba(244, 114, 182, 0.15);
}

.tag:nth-child(3n) {
  background: rgba(94, 234, 212, 0.08);
  border-color: rgba(94, 234, 212, 0.2);
}

.tag:nth-child(3n):hover {
  box-shadow: 0 4px 12px rgba(94, 234, 212, 0.15);
}

/* Blockquote */
.about-quote {
  margin: 0 0 1.25rem;
  padding: 1.25rem 1.5rem;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(192, 132, 252, 0.08), rgba(244, 114, 182, 0.06));
  border: 1px solid rgba(192, 132, 252, 0.15);
  font-family: var(--w3-font-display);
  font-size: 1.15rem;
  font-style: italic;
  font-weight: 400;
  line-height: 1.6;
  color: var(--w3-text);
}

/* ── Responsive ── */
@media (max-width: 600px) {
  .about-main {
    padding: 1rem 1rem 2rem;
    gap: 1rem;
  }

  .about-hero { padding: 1.5rem 1.25rem; }

  .chain-block {
    width: 68px;
    padding: 0.6rem 0.4rem 0.5rem;
  }

  .block-icon { width: 24px; height: 24px; padding: 4px; }
  .block-label { font-size: 0.58rem; }
  .chain-link { width: 16px; }
  .block-panel { padding: 1.5rem 1.25rem; }
}