.btn {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .5rem 1rem;
  border-radius: 6px;
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: .01em;
  transition: transform .1s, box-shadow .1s;
  line-height: 1;
}

.btn:hover  { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,.14); }
.btn:active { transform: none; box-shadow: none; }

.btn-primary { background: var(--navy); color: #fff; }
.btn-teal    { background: var(--teal); color: #fff; }

.btn-danger {
  background: var(--red-light);
  color: var(--red);
}
.btn-danger:hover { box-shadow: 0 4px 12px rgba(185,28,28,.18); }

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-secondary:hover {
  border-color: var(--slate-300);
  background: var(--color-bg);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-muted);
  padding: .5rem .6rem;
}
.btn-ghost:hover {
  color: var(--color-text);
  background: var(--color-bg);
  transform: none;
  box-shadow: none;
}

.btn-sm { padding: .35rem .75rem; font-size: .74rem; }
.btn-lg { padding: .75rem 1.75rem; font-size: 1rem; }