/* ============================================================
   EXPERTISE PAGE — expertise.html specific styles
   ============================================================ */

.expertise-header {
  padding-top: calc(var(--nav-h) + 4rem);
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--border);
}

.expertise-header__title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 700;
  color: var(--text);
  letter-spacing: -2px;
  margin-bottom: 0.75rem;
}

.expertise-header__sub {
  color: var(--text-muted);
  font-size: 1rem;
}

/* ---- CAPABILITY GROUPS ---- */

.capabilities {
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.cap-group {
  border-bottom: 1px solid var(--border);
  padding-bottom: 3rem;
}

.cap-group:last-child {
  border-bottom: none;
}

.cap-group__header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.cap-group__icon {
  width: 32px;
  height: 32px;
  background: var(--accent-dim);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}

.cap-group__title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text);
}

.cap-group__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.cap-group__tags .tag {
  font-size: 0.78rem;
  padding: 0.35rem 0.75rem;
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.cap-group__tags .tag:hover {
  background: rgba(0,194,168,0.2);
  border-color: var(--accent);
  transform: translateY(-1px);
}

/* Sub-group inside a cap-group */
.cap-subgroup {
  margin-top: 1.25rem;
}

.cap-subgroup__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.6rem;
}

/* ---- EVOLUTION FLOW ---- */

.evolution {
  margin-top: 4rem;
}

.evolution__title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 2.5rem;
}

.evo-flow {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
  position: relative;
  padding-left: 0;
}

.evo-step {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  position: relative;
}

.evo-step__connector {
  display: flex;
  flex-direction: column;
  align-items: center;
  flex-shrink: 0;
  width: 32px;
}

.evo-step__dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--surface);
  border: 2px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  color: var(--accent);
  flex-shrink: 0;
  position: relative;
  z-index: 1;
}

.evo-step__line {
  width: 1px;
  height: 56px;
  background: linear-gradient(180deg, var(--accent) 0%, var(--border-hover) 100%);
  margin: 4px 0;
}

.evo-step:last-child .evo-step__line {
  display: none;
}

.evo-step__content {
  padding-top: 0.4rem;
  padding-bottom: 1.5rem;
}

.evo-step__year {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  margin-bottom: 0.2rem;
}

.evo-step__label {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

.evo-step__desc {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.2rem;
}

/* ---- CURRENT EXPLORATION ---- */

.exploration {
  margin-top: 4rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-lg);
  padding: 2rem;
}

.exploration__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.75rem;
}

.exploration__title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 1rem;
}

@media (max-width: 600px) {
  .evo-step__line { height: 40px; }
}