.brand {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  gap: .7rem;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: .9rem;
  font-weight: 750;
  letter-spacing: .19em;
  text-decoration: none;
}

.brand-mark {
  display: block;
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  color: inherit;
}
.brand-mark path {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.8;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: .78rem 1.15rem;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: .89rem;
  font-weight: 700;
  line-height: 1.2;
  text-align: center;
  text-decoration: none;
  transition: transform var(--transition), border-color var(--transition), background var(--transition), box-shadow var(--transition);
}

.button:hover { transform: translateY(-2px); }

.button--primary {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-bright));
  box-shadow: 0 10px 30px rgba(45, 212, 191, .14);
  color: #03110f;
}

.button--primary:hover { box-shadow: 0 14px 36px rgba(45, 212, 191, .23); }

.button--quiet {
  border-color: var(--color-border-strong);
  background: rgba(255, 255, 255, .025);
  color: var(--color-text);
}

.button--quiet:hover { border-color: var(--color-border-active); background: rgba(45, 212, 191, .055); }

.button-row { display: flex; flex-wrap: wrap; gap: .75rem; }

.signal-dot {
  width: .48rem;
  height: .48rem;
  border-radius: 50%;
  background: var(--color-accent);
  box-shadow: 0 0 0 5px rgba(45, 212, 191, .1);
}

.card-grid { display: grid; gap: 1rem; }
.card-grid--three { grid-template-columns: repeat(3, minmax(0, 1fr)); }

.card, .system-card, .brief-card, .team-card {
  border: 1px solid var(--color-border);
  background: linear-gradient(145deg, rgba(17, 25, 37, .74), rgba(10, 15, 23, .88));
  box-shadow: var(--shadow-panel);
}

.card {
  min-height: 260px;
  padding: clamp(1.4rem, 3vw, 2rem);
  border-radius: var(--radius-md);
  transition: transform var(--transition), border-color var(--transition);
}

.card:hover { transform: translateY(-4px); border-color: var(--color-border-active); }
.card p { margin-bottom: 0; }

.card-index, .system-number {
  display: block;
  margin-bottom: 3.5rem;
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: .73rem;
  letter-spacing: .1em;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding: 0;
  margin: 1.8rem 0 0;
  list-style: none;
}

.tag-list li {
  padding: .38rem .58rem;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: .67rem;
  letter-spacing: .04em;
  text-transform: uppercase;
}

@media (max-width: 800px) {
  .card-grid--three { grid-template-columns: 1fr; }
  .card { min-height: 0; }
  .card-index { margin-bottom: 2rem; }
}

@media (max-width: 520px) {
  .button-row { align-items: stretch; flex-direction: column; }
  .button-row .button { width: 100%; }
}